./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_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/safe004_power.opt_pso.opt_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/safe004_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/safe004_power.opt_pso.opt_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 20:56:24,498 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:56:24,539 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:56:24,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:56:24,542 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:56:24,555 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:56:24,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:56:24,555 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:56:24,555 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:56:24,556 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:56:24,556 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:56:24,556 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:56:24,557 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:56:24,557 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:56:24,557 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:56:24,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:56:24,558 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:56:24,558 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:56:24,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:56:24,558 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:56:24,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:56:24,559 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:56:24,559 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:56:24,559 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:56:24,560 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:56:24,560 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:56:24,560 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:56:24,560 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:56:24,561 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:56:24,561 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:56:24,561 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:56:24,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:56:24,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:56:24,562 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:56:24,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:56:24,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:56:24,562 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:56:24,562 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:56:24,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:56:24,563 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:56:24,563 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:56:24,576 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:56:24,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:56:24,576 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:56:24,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:56:24,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:56:24,819 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:56:24,820 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:56:24,821 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:56:24,822 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:56:25,780 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:56:26,015 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:56:26,016 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:56:26,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0507515cf/cf79965b26164538af251dea1fd24bc1/FLAG285e3e701 [2024-06-27 20:56:26,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0507515cf/cf79965b26164538af251dea1fd24bc1 [2024-06-27 20:56:26,038 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:56:26,038 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:56:26,039 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe004_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-27 20:56:26,142 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:56:26,143 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:56:26,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:56:26,144 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:56:26,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:56:26,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:56:26" (1/2) ... [2024-06-27 20:56:26,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688bf400 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:26, skipping insertion in model container [2024-06-27 20:56:26,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:56:26" (1/2) ... [2024-06-27 20:56:26,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@52eef428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:56:26, skipping insertion in model container [2024-06-27 20:56:26,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:26" (2/2) ... [2024-06-27 20:56:26,150 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@688bf400 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26, skipping insertion in model container [2024-06-27 20:56:26,150 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:26" (2/2) ... [2024-06-27 20:56:26,150 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:56:26,223 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:56:26,224 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 20:56:26,224 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 20:56:26,224 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 20:56:26,224 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:56:26,224 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-27 20:56:26,261 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:56:26,520 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:56:26,531 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:56:26,644 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:56:26,669 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:56:26,670 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26 WrapperNode [2024-06-27 20:56:26,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:56:26,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:56:26,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:56:26,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:56:26,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,739 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-27 20:56:26,742 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:56:26,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:56:26,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:56:26,743 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:56:26,752 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,784 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 20:56:26,796 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,796 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,802 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,834 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,835 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,838 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:56:26,838 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:56:26,838 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:56:26,839 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:56:26,839 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (1/1) ... [2024-06-27 20:56:26,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:56:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:56:26,907 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 20:56:26,922 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 20:56:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:56:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:56:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:56:26,946 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:56:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:56:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:56:26,958 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:56:26,958 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:56:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:56:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:56:26,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:56:26,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:56:26,960 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 20:56:27,072 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:56:27,074 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:56:27,333 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:56:27,333 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:56:27,489 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:56:27,489 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:56:27,491 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:56:27 BoogieIcfgContainer [2024-06-27 20:56:27,491 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:56:27,494 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:56:27,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:56:27,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:56:27,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:56:26" (1/4) ... [2024-06-27 20:56:27,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3abae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:56:27, skipping insertion in model container [2024-06-27 20:56:27,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:56:26" (2/4) ... [2024-06-27 20:56:27,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3abae8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:56:27, skipping insertion in model container [2024-06-27 20:56:27,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:56:26" (3/4) ... [2024-06-27 20:56:27,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c3abae8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:56:27, skipping insertion in model container [2024-06-27 20:56:27,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:56:27" (4/4) ... [2024-06-27 20:56:27,499 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.opt_pso.opt_rmo.opt.i [2024-06-27 20:56:27,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:56:27,512 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:56:27,512 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:56:27,599 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:56:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:56:27,642 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-27 20:56:27,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:56:27,644 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 63 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 20:56:27,644 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-27 20:56:27,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-27 20:56:27,653 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:56:27,658 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;@45827f5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:56:27,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:56:27,661 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:56:27,661 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:56:27,661 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:56:27,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:27,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:56:27,662 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 20:56:27,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 368623954, now seen corresponding path program 1 times [2024-06-27 20:56:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484024681] [2024-06-27 20:56:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:28,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484024681] [2024-06-27 20:56:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484024681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:28,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:56:28,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139670602] [2024-06-27 20:56:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:28,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:56:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:56:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:56:28,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-27 20:56:28,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:28,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:28,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-27 20:56:28,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:28,724 INFO L124 PetriNetUnfolderBase]: 1152/1755 cut-off events. [2024-06-27 20:56:28,725 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-27 20:56:28,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3595 conditions, 1755 events. 1152/1755 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8184 event pairs, 794 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-27 20:56:28,738 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:56:28,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 171 flow [2024-06-27 20:56:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:56:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:56:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-27 20:56:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-27 20:56:28,750 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-27 20:56:28,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 171 flow [2024-06-27 20:56:28,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:28,755 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-27 20:56:28,756 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 20:56:28,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-27 20:56:28,760 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-27 20:56:28,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:28,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:28,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:28,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:56:28,761 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 20:56:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:28,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2060553313, now seen corresponding path program 1 times [2024-06-27 20:56:28,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:28,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518803723] [2024-06-27 20:56:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:29,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:29,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518803723] [2024-06-27 20:56:29,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518803723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:29,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:29,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:56:29,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077508976] [2024-06-27 20:56:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:29,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:56:29,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:56:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:56:29,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:29,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:29,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:29,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:29,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:29,488 INFO L124 PetriNetUnfolderBase]: 1644/2456 cut-off events. [2024-06-27 20:56:29,488 INFO L125 PetriNetUnfolderBase]: For 375/375 co-relation queries the response was YES. [2024-06-27 20:56:29,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5637 conditions, 2456 events. 1644/2456 cut-off events. For 375/375 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11062 event pairs, 1035 based on Foata normal form. 3/2457 useless extension candidates. Maximal degree in co-relation 5625. Up to 2429 conditions per place. [2024-06-27 20:56:29,499 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 43 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 20:56:29,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 54 transitions, 254 flow [2024-06-27 20:56:29,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:56:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:56:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-27 20:56:29,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 20:56:29,501 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 86 transitions. [2024-06-27 20:56:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 54 transitions, 254 flow [2024-06-27 20:56:29,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:56:29,503 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-27 20:56:29,503 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-27 20:56:29,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-27 20:56:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-27 20:56:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:29,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:29,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:56:29,504 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 20:56:29,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash -547356015, now seen corresponding path program 1 times [2024-06-27 20:56:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766904442] [2024-06-27 20:56:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:29,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:29,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766904442] [2024-06-27 20:56:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766904442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:29,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:29,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:56:29,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484629053] [2024-06-27 20:56:29,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:29,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:56:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:29,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:56:29,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:56:29,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:29,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 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 20:56:29,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:29,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:29,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:30,167 INFO L124 PetriNetUnfolderBase]: 1632/2438 cut-off events. [2024-06-27 20:56:30,167 INFO L125 PetriNetUnfolderBase]: For 1217/1217 co-relation queries the response was YES. [2024-06-27 20:56:30,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 2438 events. 1632/2438 cut-off events. For 1217/1217 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10956 event pairs, 743 based on Foata normal form. 6/2442 useless extension candidates. Maximal degree in co-relation 6197. Up to 2381 conditions per place. [2024-06-27 20:56:30,178 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 20:56:30,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 65 transitions, 340 flow [2024-06-27 20:56:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:56:30,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:56:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-27 20:56:30,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 20:56:30,183 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 106 transitions. [2024-06-27 20:56:30,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 65 transitions, 340 flow [2024-06-27 20:56:30,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 338 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-27 20:56:30,186 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 196 flow [2024-06-27 20:56:30,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:56:30,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-27 20:56:30,188 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 196 flow [2024-06-27 20:56:30,188 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 20:56:30,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:30,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:56:30,189 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 20:56:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash -304157824, now seen corresponding path program 1 times [2024-06-27 20:56:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:30,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806358290] [2024-06-27 20:56:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:30,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:30,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:31,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806358290] [2024-06-27 20:56:31,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806358290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:31,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:31,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:31,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961450030] [2024-06-27 20:56:31,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:31,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:31,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:31,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:31,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:31,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 196 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 20:56:31,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:31,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:31,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:31,378 INFO L124 PetriNetUnfolderBase]: 1623/2423 cut-off events. [2024-06-27 20:56:31,378 INFO L125 PetriNetUnfolderBase]: For 2223/2223 co-relation queries the response was YES. [2024-06-27 20:56:31,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6779 conditions, 2423 events. 1623/2423 cut-off events. For 2223/2223 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 10845 event pairs, 579 based on Foata normal form. 6/2427 useless extension candidates. Maximal degree in co-relation 6761. Up to 2336 conditions per place. [2024-06-27 20:56:31,417 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 55 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-27 20:56:31,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 404 flow [2024-06-27 20:56:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:31,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 20:56:31,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-27 20:56:31,420 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 196 flow. Second operand 6 states and 121 transitions. [2024-06-27 20:56:31,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 404 flow [2024-06-27 20:56:31,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 71 transitions, 382 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:31,426 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 215 flow [2024-06-27 20:56:31,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=215, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-27 20:56:31,427 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-27 20:56:31,427 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 215 flow [2024-06-27 20:56:31,428 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 20:56:31,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:31,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:31,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:56:31,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:31,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:31,429 INFO L85 PathProgramCache]: Analyzing trace with hash -546325912, now seen corresponding path program 1 times [2024-06-27 20:56:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544088232] [2024-06-27 20:56:31,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544088232] [2024-06-27 20:56:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544088232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:31,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:31,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:56:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046437070] [2024-06-27 20:56:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:56:31,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:31,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:56:31,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:56:32,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-27 20:56:32,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:32,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:32,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-27 20:56:32,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:32,248 INFO L124 PetriNetUnfolderBase]: 1245/1943 cut-off events. [2024-06-27 20:56:32,248 INFO L125 PetriNetUnfolderBase]: For 2900/2936 co-relation queries the response was YES. [2024-06-27 20:56:32,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5722 conditions, 1943 events. 1245/1943 cut-off events. For 2900/2936 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9331 event pairs, 585 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 5702. Up to 1826 conditions per place. [2024-06-27 20:56:32,259 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 43 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-27 20:56:32,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 62 transitions, 375 flow [2024-06-27 20:56:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:56:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:56:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-27 20:56:32,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:56:32,261 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 215 flow. Second operand 5 states and 90 transitions. [2024-06-27 20:56:32,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 62 transitions, 375 flow [2024-06-27 20:56:32,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 344 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:32,266 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 255 flow [2024-06-27 20:56:32,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2024-06-27 20:56:32,268 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-06-27 20:56:32,269 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 255 flow [2024-06-27 20:56:32,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:32,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:32,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:32,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:56:32,272 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 20:56:32,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:32,273 INFO L85 PathProgramCache]: Analyzing trace with hash 243767570, now seen corresponding path program 1 times [2024-06-27 20:56:32,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:32,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459484276] [2024-06-27 20:56:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:32,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459484276] [2024-06-27 20:56:32,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459484276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:32,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675236034] [2024-06-27 20:56:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:32,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:32,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:32,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 255 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 20:56:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:33,151 INFO L124 PetriNetUnfolderBase]: 1626/2431 cut-off events. [2024-06-27 20:56:33,152 INFO L125 PetriNetUnfolderBase]: For 4634/4646 co-relation queries the response was YES. [2024-06-27 20:56:33,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 2431 events. 1626/2431 cut-off events. For 4634/4646 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10946 event pairs, 734 based on Foata normal form. 12/2439 useless extension candidates. Maximal degree in co-relation 7843. Up to 2346 conditions per place. [2024-06-27 20:56:33,165 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 58 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-27 20:56:33,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 77 transitions, 515 flow [2024-06-27 20:56:33,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:33,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:56:33,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 20:56:33,167 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 255 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:56:33,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 77 transitions, 515 flow [2024-06-27 20:56:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 77 transitions, 498 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 20:56:33,171 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 346 flow [2024-06-27 20:56:33,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=346, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2024-06-27 20:56:33,171 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-27 20:56:33,172 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 346 flow [2024-06-27 20:56:33,172 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 20:56:33,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:33,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:56:33,172 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 20:56:33,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 231276359, now seen corresponding path program 1 times [2024-06-27 20:56:33,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772470554] [2024-06-27 20:56:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:33,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:33,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:33,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772470554] [2024-06-27 20:56:33,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772470554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:33,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:33,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:33,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671475298] [2024-06-27 20:56:33,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:33,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:33,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:33,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:33,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 346 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 20:56:33,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:33,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:33,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:33,997 INFO L124 PetriNetUnfolderBase]: 1649/2465 cut-off events. [2024-06-27 20:56:33,998 INFO L125 PetriNetUnfolderBase]: For 6739/6739 co-relation queries the response was YES. [2024-06-27 20:56:34,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8891 conditions, 2465 events. 1649/2465 cut-off events. For 6739/6739 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11041 event pairs, 758 based on Foata normal form. 2/2465 useless extension candidates. Maximal degree in co-relation 8865. Up to 2422 conditions per place. [2024-06-27 20:56:34,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 69 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-27 20:56:34,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 626 flow [2024-06-27 20:56:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:56:34,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:56:34,016 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 346 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:56:34,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 626 flow [2024-06-27 20:56:34,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 88 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-27 20:56:34,022 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 427 flow [2024-06-27 20:56:34,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=427, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-06-27 20:56:34,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-06-27 20:56:34,023 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 427 flow [2024-06-27 20:56:34,023 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 20:56:34,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:34,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:34,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:56:34,024 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 20:56:34,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:34,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1038860089, now seen corresponding path program 2 times [2024-06-27 20:56:34,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:34,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257893675] [2024-06-27 20:56:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:34,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:34,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257893675] [2024-06-27 20:56:34,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257893675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:34,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537846639] [2024-06-27 20:56:34,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:34,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:34,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:34,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 427 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 20:56:34,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:34,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:34,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:34,919 INFO L124 PetriNetUnfolderBase]: 1660/2481 cut-off events. [2024-06-27 20:56:34,920 INFO L125 PetriNetUnfolderBase]: For 8271/8271 co-relation queries the response was YES. [2024-06-27 20:56:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9213 conditions, 2481 events. 1660/2481 cut-off events. For 8271/8271 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11147 event pairs, 754 based on Foata normal form. 2/2481 useless extension candidates. Maximal degree in co-relation 9184. Up to 2429 conditions per place. [2024-06-27 20:56:34,932 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-06-27 20:56:34,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 87 transitions, 677 flow [2024-06-27 20:56:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:34,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 20:56:34,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 20:56:34,937 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 427 flow. Second operand 6 states and 98 transitions. [2024-06-27 20:56:34,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 87 transitions, 677 flow [2024-06-27 20:56:34,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 636 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:34,950 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 468 flow [2024-06-27 20:56:34,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-27 20:56:34,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-27 20:56:34,952 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 468 flow [2024-06-27 20:56:34,952 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 20:56:34,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:34,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:56:34,952 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 20:56:34,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1033146169, now seen corresponding path program 3 times [2024-06-27 20:56:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491084568] [2024-06-27 20:56:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:35,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491084568] [2024-06-27 20:56:35,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491084568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:35,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:35,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:35,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057273125] [2024-06-27 20:56:35,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:35,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:35,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:35,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:35,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:35,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 468 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 20:56:35,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:35,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:35,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:35,770 INFO L124 PetriNetUnfolderBase]: 1647/2464 cut-off events. [2024-06-27 20:56:35,770 INFO L125 PetriNetUnfolderBase]: For 9961/9973 co-relation queries the response was YES. [2024-06-27 20:56:35,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9376 conditions, 2464 events. 1647/2464 cut-off events. For 9961/9973 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11101 event pairs, 759 based on Foata normal form. 12/2470 useless extension candidates. Maximal degree in co-relation 9347. Up to 2355 conditions per place. [2024-06-27 20:56:35,786 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 60 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-27 20:56:35,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 87 transitions, 699 flow [2024-06-27 20:56:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 20:56:35,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:56:35,788 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 468 flow. Second operand 6 states and 99 transitions. [2024-06-27 20:56:35,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 87 transitions, 699 flow [2024-06-27 20:56:35,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 87 transitions, 643 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:56:35,800 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 503 flow [2024-06-27 20:56:35,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=503, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-27 20:56:35,801 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-27 20:56:35,801 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 503 flow [2024-06-27 20:56:35,801 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 20:56:35,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:35,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:35,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:56:35,802 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 20:56:35,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138233, now seen corresponding path program 1 times [2024-06-27 20:56:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:35,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798692275] [2024-06-27 20:56:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:36,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:36,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798692275] [2024-06-27 20:56:36,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798692275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:36,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:36,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:36,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579276803] [2024-06-27 20:56:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:36,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:36,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:36,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:36,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 503 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 20:56:36,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:36,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:36,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:36,984 INFO L124 PetriNetUnfolderBase]: 1653/2473 cut-off events. [2024-06-27 20:56:36,985 INFO L125 PetriNetUnfolderBase]: For 9851/9863 co-relation queries the response was YES. [2024-06-27 20:56:36,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9455 conditions, 2473 events. 1653/2473 cut-off events. For 9851/9863 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11113 event pairs, 723 based on Foata normal form. 12/2479 useless extension candidates. Maximal degree in co-relation 9424. Up to 2346 conditions per place. [2024-06-27 20:56:36,995 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 30 changer transitions 0/95 dead transitions. [2024-06-27 20:56:36,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 95 transitions, 769 flow [2024-06-27 20:56:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:56:36,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-27 20:56:36,997 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 503 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:56:36,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 95 transitions, 769 flow [2024-06-27 20:56:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 733 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:37,006 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 568 flow [2024-06-27 20:56:37,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=568, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-27 20:56:37,007 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-27 20:56:37,010 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 568 flow [2024-06-27 20:56:37,010 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 20:56:37,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:37,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:37,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:56:37,010 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 20:56:37,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1905986761, now seen corresponding path program 1 times [2024-06-27 20:56:37,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:37,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230711786] [2024-06-27 20:56:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:37,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:37,592 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 20:56:37,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:37,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230711786] [2024-06-27 20:56:37,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230711786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:37,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:37,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:37,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406594166] [2024-06-27 20:56:37,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:37,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:37,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:37,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 568 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 20:56:37,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:37,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:37,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:38,124 INFO L124 PetriNetUnfolderBase]: 1675/2503 cut-off events. [2024-06-27 20:56:38,124 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2024-06-27 20:56:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10254 conditions, 2503 events. 1675/2503 cut-off events. For 12109/12109 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11226 event pairs, 575 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 10222. Up to 2415 conditions per place. [2024-06-27 20:56:38,138 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 85 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-06-27 20:56:38,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 888 flow [2024-06-27 20:56:38,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:56:38,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 20:56:38,140 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 568 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:56:38,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 888 flow [2024-06-27 20:56:38,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 108 transitions, 817 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:38,153 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 588 flow [2024-06-27 20:56:38,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-06-27 20:56:38,154 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-27 20:56:38,154 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 588 flow [2024-06-27 20:56:38,154 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 20:56:38,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:38,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:38,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:56:38,155 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 20:56:38,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:38,155 INFO L85 PathProgramCache]: Analyzing trace with hash -356135449, now seen corresponding path program 2 times [2024-06-27 20:56:38,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:38,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313221880] [2024-06-27 20:56:38,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:38,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313221880] [2024-06-27 20:56:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313221880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667513633] [2024-06-27 20:56:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:38,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:38,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 588 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 20:56:38,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:38,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:38,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:39,058 INFO L124 PetriNetUnfolderBase]: 1713/2558 cut-off events. [2024-06-27 20:56:39,059 INFO L125 PetriNetUnfolderBase]: For 15207/15207 co-relation queries the response was YES. [2024-06-27 20:56:39,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11138 conditions, 2558 events. 1713/2558 cut-off events. For 15207/15207 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11492 event pairs, 562 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 11104. Up to 2418 conditions per place. [2024-06-27 20:56:39,073 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 82 selfloop transitions, 29 changer transitions 0/114 dead transitions. [2024-06-27 20:56:39,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 982 flow [2024-06-27 20:56:39,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:56:39,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:56:39,075 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 588 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:56:39,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 982 flow [2024-06-27 20:56:39,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 948 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:39,087 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 679 flow [2024-06-27 20:56:39,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=679, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-27 20:56:39,088 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-27 20:56:39,088 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 679 flow [2024-06-27 20:56:39,088 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 20:56:39,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:39,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:39,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:56:39,090 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 20:56:39,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:39,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1962758695, now seen corresponding path program 3 times [2024-06-27 20:56:39,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637811969] [2024-06-27 20:56:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:39,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:39,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637811969] [2024-06-27 20:56:39,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637811969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:39,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:39,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30450373] [2024-06-27 20:56:39,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:39,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:39,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:39,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 679 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 20:56:39,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:39,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:39,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:40,152 INFO L124 PetriNetUnfolderBase]: 1785/2669 cut-off events. [2024-06-27 20:56:40,152 INFO L125 PetriNetUnfolderBase]: For 19649/19658 co-relation queries the response was YES. [2024-06-27 20:56:40,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12138 conditions, 2669 events. 1785/2669 cut-off events. For 19649/19658 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12091 event pairs, 510 based on Foata normal form. 16/2676 useless extension candidates. Maximal degree in co-relation 12103. Up to 2249 conditions per place. [2024-06-27 20:56:40,165 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 81 selfloop transitions, 43 changer transitions 0/127 dead transitions. [2024-06-27 20:56:40,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1197 flow [2024-06-27 20:56:40,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:40,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:56:40,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 20:56:40,167 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 679 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:56:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1197 flow [2024-06-27 20:56:40,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 1161 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:40,180 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 863 flow [2024-06-27 20:56:40,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=863, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-27 20:56:40,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-27 20:56:40,181 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 863 flow [2024-06-27 20:56:40,181 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 20:56:40,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:40,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:40,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:56:40,182 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 20:56:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1962512431, now seen corresponding path program 1 times [2024-06-27 20:56:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:40,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173292392] [2024-06-27 20:56:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:40,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:40,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173292392] [2024-06-27 20:56:40,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173292392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:40,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:40,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:40,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150323842] [2024-06-27 20:56:40,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:40,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:40,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:41,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:41,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 863 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 20:56:41,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:41,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:41,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:41,394 INFO L124 PetriNetUnfolderBase]: 1794/2681 cut-off events. [2024-06-27 20:56:41,395 INFO L125 PetriNetUnfolderBase]: For 23345/23360 co-relation queries the response was YES. [2024-06-27 20:56:41,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13311 conditions, 2681 events. 1794/2681 cut-off events. For 23345/23360 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12119 event pairs, 508 based on Foata normal form. 18/2693 useless extension candidates. Maximal degree in co-relation 13273. Up to 2518 conditions per place. [2024-06-27 20:56:41,413 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 91 selfloop transitions, 33 changer transitions 0/127 dead transitions. [2024-06-27 20:56:41,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1219 flow [2024-06-27 20:56:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:41,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:41,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:56:41,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-27 20:56:41,415 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 863 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:56:41,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1219 flow [2024-06-27 20:56:41,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 127 transitions, 1171 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 20:56:41,438 INFO L231 Difference]: Finished difference. Result has 91 places, 103 transitions, 931 flow [2024-06-27 20:56:41,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=931, PETRI_PLACES=91, PETRI_TRANSITIONS=103} [2024-06-27 20:56:41,439 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-27 20:56:41,439 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 103 transitions, 931 flow [2024-06-27 20:56:41,439 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 20:56:41,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:41,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:41,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:56:41,440 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 20:56:41,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1043863846, now seen corresponding path program 1 times [2024-06-27 20:56:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:41,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027351774] [2024-06-27 20:56:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:42,212 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 20:56:42,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027351774] [2024-06-27 20:56:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027351774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:42,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635623297] [2024-06-27 20:56:42,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:42,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:42,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:42,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:42,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:42,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 931 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 20:56:42,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:42,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:42,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:42,764 INFO L124 PetriNetUnfolderBase]: 1789/2672 cut-off events. [2024-06-27 20:56:42,769 INFO L125 PetriNetUnfolderBase]: For 25605/25605 co-relation queries the response was YES. [2024-06-27 20:56:42,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13677 conditions, 2672 events. 1789/2672 cut-off events. For 25605/25605 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12092 event pairs, 530 based on Foata normal form. 2/2672 useless extension candidates. Maximal degree in co-relation 13637. Up to 2575 conditions per place. [2024-06-27 20:56:42,801 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 22 changer transitions 0/128 dead transitions. [2024-06-27 20:56:42,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 128 transitions, 1259 flow [2024-06-27 20:56:42,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:42,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:42,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:56:42,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 20:56:42,803 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 931 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:56:42,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 128 transitions, 1259 flow [2024-06-27 20:56:42,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 1157 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:42,832 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 885 flow [2024-06-27 20:56:42,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=885, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-27 20:56:42,833 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-27 20:56:42,833 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 885 flow [2024-06-27 20:56:42,833 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 20:56:42,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:42,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:42,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:56:42,834 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 20:56:42,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1915804637, now seen corresponding path program 1 times [2024-06-27 20:56:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:42,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717837340] [2024-06-27 20:56:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:42,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:43,334 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 20:56:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717837340] [2024-06-27 20:56:43,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717837340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134958456] [2024-06-27 20:56:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:43,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:43,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:43,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 885 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:43,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:43,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:43,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:43,784 INFO L124 PetriNetUnfolderBase]: 1811/2708 cut-off events. [2024-06-27 20:56:43,784 INFO L125 PetriNetUnfolderBase]: For 28866/28887 co-relation queries the response was YES. [2024-06-27 20:56:43,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13865 conditions, 2708 events. 1811/2708 cut-off events. For 28866/28887 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12300 event pairs, 524 based on Foata normal form. 18/2718 useless extension candidates. Maximal degree in co-relation 13824. Up to 2593 conditions per place. [2024-06-27 20:56:43,796 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 22 changer transitions 0/130 dead transitions. [2024-06-27 20:56:43,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 130 transitions, 1247 flow [2024-06-27 20:56:43,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:56:43,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:56:43,798 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 885 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:56:43,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 130 transitions, 1247 flow [2024-06-27 20:56:43,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 130 transitions, 1191 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:43,815 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 919 flow [2024-06-27 20:56:43,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-06-27 20:56:43,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-06-27 20:56:43,816 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 919 flow [2024-06-27 20:56:43,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:43,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:43,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:43,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:56:43,817 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 20:56:43,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1047673281, now seen corresponding path program 2 times [2024-06-27 20:56:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391250820] [2024-06-27 20:56:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391250820] [2024-06-27 20:56:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391250820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:44,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:44,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:44,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698454811] [2024-06-27 20:56:44,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:44,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:44,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:44,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 919 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:44,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:44,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:44,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:44,823 INFO L124 PetriNetUnfolderBase]: 1881/2810 cut-off events. [2024-06-27 20:56:44,823 INFO L125 PetriNetUnfolderBase]: For 33671/33680 co-relation queries the response was YES. [2024-06-27 20:56:44,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14838 conditions, 2810 events. 1881/2810 cut-off events. For 33671/33680 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12828 event pairs, 508 based on Foata normal form. 8/2809 useless extension candidates. Maximal degree in co-relation 14796. Up to 2316 conditions per place. [2024-06-27 20:56:44,838 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 84 selfloop transitions, 53 changer transitions 0/140 dead transitions. [2024-06-27 20:56:44,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 140 transitions, 1481 flow [2024-06-27 20:56:44,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:44,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:56:44,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:56:44,840 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 919 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:56:44,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 140 transitions, 1481 flow [2024-06-27 20:56:44,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1419 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:44,864 INFO L231 Difference]: Finished difference. Result has 96 places, 113 transitions, 1076 flow [2024-06-27 20:56:44,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1076, PETRI_PLACES=96, PETRI_TRANSITIONS=113} [2024-06-27 20:56:44,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-27 20:56:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 113 transitions, 1076 flow [2024-06-27 20:56:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:44,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:56:44,865 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 20:56:44,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1552322645, now seen corresponding path program 3 times [2024-06-27 20:56:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:44,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432974786] [2024-06-27 20:56:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:45,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:45,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432974786] [2024-06-27 20:56:45,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432974786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:45,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:45,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:45,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745746038] [2024-06-27 20:56:45,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:45,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:45,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:45,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:45,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:45,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:45,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 113 transitions, 1076 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:45,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:45,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:45,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:45,908 INFO L124 PetriNetUnfolderBase]: 1861/2782 cut-off events. [2024-06-27 20:56:45,909 INFO L125 PetriNetUnfolderBase]: For 37796/37805 co-relation queries the response was YES. [2024-06-27 20:56:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15366 conditions, 2782 events. 1861/2782 cut-off events. For 37796/37805 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12675 event pairs, 506 based on Foata normal form. 12/2785 useless extension candidates. Maximal degree in co-relation 15322. Up to 2304 conditions per place. [2024-06-27 20:56:45,924 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 82 selfloop transitions, 55 changer transitions 0/140 dead transitions. [2024-06-27 20:56:45,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1568 flow [2024-06-27 20:56:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:56:45,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45357142857142857 [2024-06-27 20:56:45,927 INFO L175 Difference]: Start difference. First operand has 96 places, 113 transitions, 1076 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:56:45,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1568 flow [2024-06-27 20:56:45,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 140 transitions, 1466 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:56:45,978 INFO L231 Difference]: Finished difference. Result has 100 places, 113 transitions, 1094 flow [2024-06-27 20:56:45,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1094, PETRI_PLACES=100, PETRI_TRANSITIONS=113} [2024-06-27 20:56:45,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-27 20:56:45,978 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 113 transitions, 1094 flow [2024-06-27 20:56:45,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:45,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:45,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:45,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:56:45,980 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 20:56:45,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -708618296, now seen corresponding path program 1 times [2024-06-27 20:56:45,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:45,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737140763] [2024-06-27 20:56:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:45,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:46,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737140763] [2024-06-27 20:56:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737140763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722235003] [2024-06-27 20:56:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:46,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 113 transitions, 1094 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:46,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:46,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:46,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:47,232 INFO L124 PetriNetUnfolderBase]: 1872/2795 cut-off events. [2024-06-27 20:56:47,232 INFO L125 PetriNetUnfolderBase]: For 40617/40632 co-relation queries the response was YES. [2024-06-27 20:56:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15646 conditions, 2795 events. 1872/2795 cut-off events. For 40617/40632 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12682 event pairs, 525 based on Foata normal form. 12/2801 useless extension candidates. Maximal degree in co-relation 15601. Up to 2677 conditions per place. [2024-06-27 20:56:47,250 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 105 selfloop transitions, 27 changer transitions 0/135 dead transitions. [2024-06-27 20:56:47,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 135 transitions, 1459 flow [2024-06-27 20:56:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:56:47,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:56:47,252 INFO L175 Difference]: Start difference. First operand has 100 places, 113 transitions, 1094 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:56:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 135 transitions, 1459 flow [2024-06-27 20:56:47,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 135 transitions, 1313 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:47,287 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 1059 flow [2024-06-27 20:56:47,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1059, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-06-27 20:56:47,287 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-27 20:56:47,287 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 1059 flow [2024-06-27 20:56:47,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:47,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:47,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:56:47,288 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 20:56:47,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash -708351386, now seen corresponding path program 2 times [2024-06-27 20:56:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708011183] [2024-06-27 20:56:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:48,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:48,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708011183] [2024-06-27 20:56:48,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708011183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:48,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:48,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:56:48,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616298153] [2024-06-27 20:56:48,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:48,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:56:48,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:56:48,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:56:48,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:48,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 1059 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:48,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:48,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:48,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:48,587 INFO L124 PetriNetUnfolderBase]: 1861/2778 cut-off events. [2024-06-27 20:56:48,587 INFO L125 PetriNetUnfolderBase]: For 43104/43119 co-relation queries the response was YES. [2024-06-27 20:56:48,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15496 conditions, 2778 events. 1861/2778 cut-off events. For 43104/43119 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12580 event pairs, 525 based on Foata normal form. 12/2784 useless extension candidates. Maximal degree in co-relation 15450. Up to 2633 conditions per place. [2024-06-27 20:56:48,602 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 104 selfloop transitions, 34 changer transitions 0/141 dead transitions. [2024-06-27 20:56:48,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 141 transitions, 1433 flow [2024-06-27 20:56:48,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:56:48,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:56:48,604 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 1059 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:56:48,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 141 transitions, 1433 flow [2024-06-27 20:56:48,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 141 transitions, 1365 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:48,637 INFO L231 Difference]: Finished difference. Result has 104 places, 118 transitions, 1103 flow [2024-06-27 20:56:48,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=991, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1103, PETRI_PLACES=104, PETRI_TRANSITIONS=118} [2024-06-27 20:56:48,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-27 20:56:48,638 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 118 transitions, 1103 flow [2024-06-27 20:56:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:48,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:48,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:48,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:56:48,639 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 20:56:48,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash -2000018058, now seen corresponding path program 1 times [2024-06-27 20:56:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:48,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588107878] [2024-06-27 20:56:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:48,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:49,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:49,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:49,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588107878] [2024-06-27 20:56:49,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588107878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:49,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:49,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:49,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252015754] [2024-06-27 20:56:49,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:49,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:49,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:49,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:49,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:49,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:49,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 118 transitions, 1103 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 20:56:49,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:49,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:49,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:49,992 INFO L124 PetriNetUnfolderBase]: 1878/2803 cut-off events. [2024-06-27 20:56:49,992 INFO L125 PetriNetUnfolderBase]: For 47429/47429 co-relation queries the response was YES. [2024-06-27 20:56:50,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15909 conditions, 2803 events. 1878/2803 cut-off events. For 47429/47429 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12740 event pairs, 361 based on Foata normal form. 4/2805 useless extension candidates. Maximal degree in co-relation 15862. Up to 2680 conditions per place. [2024-06-27 20:56:50,009 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 127 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-27 20:56:50,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1517 flow [2024-06-27 20:56:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:56:50,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:56:50,011 INFO L175 Difference]: Start difference. First operand has 104 places, 118 transitions, 1103 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:56:50,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1517 flow [2024-06-27 20:56:50,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 150 transitions, 1431 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:50,056 INFO L231 Difference]: Finished difference. Result has 106 places, 120 transitions, 1098 flow [2024-06-27 20:56:50,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=106, PETRI_TRANSITIONS=120} [2024-06-27 20:56:50,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2024-06-27 20:56:50,057 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 120 transitions, 1098 flow [2024-06-27 20:56:50,057 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 20:56:50,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:50,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:50,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:56:50,058 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 20:56:50,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:50,058 INFO L85 PathProgramCache]: Analyzing trace with hash 736798740, now seen corresponding path program 1 times [2024-06-27 20:56:50,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:50,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470857853] [2024-06-27 20:56:50,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:50,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:50,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470857853] [2024-06-27 20:56:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470857853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:50,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125475073] [2024-06-27 20:56:50,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:50,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:50,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:50,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:50,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:50,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:50,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 120 transitions, 1098 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 20:56:50,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:50,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:50,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:51,317 INFO L124 PetriNetUnfolderBase]: 1873/2798 cut-off events. [2024-06-27 20:56:51,317 INFO L125 PetriNetUnfolderBase]: For 47201/47216 co-relation queries the response was YES. [2024-06-27 20:56:51,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15896 conditions, 2798 events. 1873/2798 cut-off events. For 47201/47216 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12730 event pairs, 466 based on Foata normal form. 12/2804 useless extension candidates. Maximal degree in co-relation 15848. Up to 2667 conditions per place. [2024-06-27 20:56:51,333 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 117 selfloop transitions, 27 changer transitions 0/147 dead transitions. [2024-06-27 20:56:51,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 147 transitions, 1502 flow [2024-06-27 20:56:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:56:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:56:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:56:51,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:56:51,334 INFO L175 Difference]: Start difference. First operand has 106 places, 120 transitions, 1098 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:56:51,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 147 transitions, 1502 flow [2024-06-27 20:56:51,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 147 transitions, 1439 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:51,370 INFO L231 Difference]: Finished difference. Result has 107 places, 123 transitions, 1147 flow [2024-06-27 20:56:51,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1147, PETRI_PLACES=107, PETRI_TRANSITIONS=123} [2024-06-27 20:56:51,371 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-27 20:56:51,371 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 123 transitions, 1147 flow [2024-06-27 20:56:51,371 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 20:56:51,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:51,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:51,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:56:51,371 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 20:56:51,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:51,372 INFO L85 PathProgramCache]: Analyzing trace with hash -995625670, now seen corresponding path program 2 times [2024-06-27 20:56:51,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:51,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104475190] [2024-06-27 20:56:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:51,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:52,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:52,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104475190] [2024-06-27 20:56:52,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104475190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:52,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:52,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226924467] [2024-06-27 20:56:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:52,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:52,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:52,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:52,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 123 transitions, 1147 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 20:56:52,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:52,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:52,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:52,828 INFO L124 PetriNetUnfolderBase]: 1890/2823 cut-off events. [2024-06-27 20:56:52,829 INFO L125 PetriNetUnfolderBase]: For 52573/52573 co-relation queries the response was YES. [2024-06-27 20:56:52,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16368 conditions, 2823 events. 1890/2823 cut-off events. For 52573/52573 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12864 event pairs, 461 based on Foata normal form. 4/2825 useless extension candidates. Maximal degree in co-relation 16319. Up to 2703 conditions per place. [2024-06-27 20:56:52,845 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 24 changer transitions 0/155 dead transitions. [2024-06-27 20:56:52,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1577 flow [2024-06-27 20:56:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:56:52,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:56:52,847 INFO L175 Difference]: Start difference. First operand has 107 places, 123 transitions, 1147 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:56:52,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1577 flow [2024-06-27 20:56:52,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 155 transitions, 1499 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:56:52,889 INFO L231 Difference]: Finished difference. Result has 110 places, 125 transitions, 1163 flow [2024-06-27 20:56:52,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1163, PETRI_PLACES=110, PETRI_TRANSITIONS=125} [2024-06-27 20:56:52,891 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-27 20:56:52,891 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 125 transitions, 1163 flow [2024-06-27 20:56:52,891 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 20:56:52,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:52,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:56:52,891 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 20:56:52,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2054656250, now seen corresponding path program 1 times [2024-06-27 20:56:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:52,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969265383] [2024-06-27 20:56:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:52,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969265383] [2024-06-27 20:56:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969265383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:53,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:53,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:53,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215464061] [2024-06-27 20:56:53,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:53,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:53,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:53,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:53,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:53,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:53,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 1163 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 20:56:53,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:53,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:53,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:54,151 INFO L124 PetriNetUnfolderBase]: 1912/2859 cut-off events. [2024-06-27 20:56:54,152 INFO L125 PetriNetUnfolderBase]: For 53596/53617 co-relation queries the response was YES. [2024-06-27 20:56:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16525 conditions, 2859 events. 1912/2859 cut-off events. For 53596/53617 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13099 event pairs, 470 based on Foata normal form. 18/2869 useless extension candidates. Maximal degree in co-relation 16475. Up to 2721 conditions per place. [2024-06-27 20:56:54,169 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 129 selfloop transitions, 25 changer transitions 0/157 dead transitions. [2024-06-27 20:56:54,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 157 transitions, 1598 flow [2024-06-27 20:56:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:54,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:56:54,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:56:54,171 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 1163 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:56:54,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 157 transitions, 1598 flow [2024-06-27 20:56:54,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 157 transitions, 1524 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:54,211 INFO L231 Difference]: Finished difference. Result has 112 places, 128 transitions, 1188 flow [2024-06-27 20:56:54,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1188, PETRI_PLACES=112, PETRI_TRANSITIONS=128} [2024-06-27 20:56:54,212 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-27 20:56:54,212 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 128 transitions, 1188 flow [2024-06-27 20:56:54,213 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 20:56:54,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:54,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:54,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:56:54,213 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 20:56:54,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:54,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1881864968, now seen corresponding path program 2 times [2024-06-27 20:56:54,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:54,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140100064] [2024-06-27 20:56:54,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:54,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:54,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:54,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140100064] [2024-06-27 20:56:54,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140100064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:54,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:54,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:54,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387671773] [2024-06-27 20:56:54,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:54,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:54,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:54,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 128 transitions, 1188 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 20:56:54,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:54,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:54,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:55,298 INFO L124 PetriNetUnfolderBase]: 1934/2892 cut-off events. [2024-06-27 20:56:55,298 INFO L125 PetriNetUnfolderBase]: For 58074/58083 co-relation queries the response was YES. [2024-06-27 20:56:55,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16876 conditions, 2892 events. 1934/2892 cut-off events. For 58074/58083 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13265 event pairs, 474 based on Foata normal form. 8/2891 useless extension candidates. Maximal degree in co-relation 16825. Up to 2389 conditions per place. [2024-06-27 20:56:55,316 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 91 selfloop transitions, 66 changer transitions 0/160 dead transitions. [2024-06-27 20:56:55,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1717 flow [2024-06-27 20:56:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:56:55,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:56:55,318 INFO L175 Difference]: Start difference. First operand has 112 places, 128 transitions, 1188 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:56:55,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1717 flow [2024-06-27 20:56:55,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 160 transitions, 1651 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:55,368 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1303 flow [2024-06-27 20:56:55,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1303, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-27 20:56:55,369 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-27 20:56:55,369 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1303 flow [2024-06-27 20:56:55,369 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 20:56:55,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:55,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:55,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:56:55,370 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 20:56:55,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:55,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1881869928, now seen corresponding path program 3 times [2024-06-27 20:56:55,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:55,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265265466] [2024-06-27 20:56:55,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:55,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:56,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265265466] [2024-06-27 20:56:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265265466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:56,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:56,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:56,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916379047] [2024-06-27 20:56:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:56,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:56,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1303 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 20:56:56,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:56,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:56,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:56,688 INFO L124 PetriNetUnfolderBase]: 1951/2914 cut-off events. [2024-06-27 20:56:56,689 INFO L125 PetriNetUnfolderBase]: For 63121/63121 co-relation queries the response was YES. [2024-06-27 20:56:56,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17497 conditions, 2914 events. 1951/2914 cut-off events. For 63121/63121 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13373 event pairs, 453 based on Foata normal form. 4/2916 useless extension candidates. Maximal degree in co-relation 17445. Up to 2758 conditions per place. [2024-06-27 20:56:56,706 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 31 changer transitions 0/162 dead transitions. [2024-06-27 20:56:56,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 162 transitions, 1749 flow [2024-06-27 20:56:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:56:56,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:56:56,708 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1303 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:56:56,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 162 transitions, 1749 flow [2024-06-27 20:56:56,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1591 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:56,759 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1256 flow [2024-06-27 20:56:56,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1256, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-27 20:56:56,760 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-27 20:56:56,760 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1256 flow [2024-06-27 20:56:56,760 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 20:56:56,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:56,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:56,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:56:56,761 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 20:56:56,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:56,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1939192100, now seen corresponding path program 3 times [2024-06-27 20:56:56,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:56,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984731529] [2024-06-27 20:56:56,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:56,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:57,417 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 20:56:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:57,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984731529] [2024-06-27 20:56:57,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984731529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:57,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:57,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:56:57,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502844531] [2024-06-27 20:56:57,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:57,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:56:57,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:57,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:56:57,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:56:57,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:57,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1256 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 20:56:57,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:57,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:57,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:57,945 INFO L124 PetriNetUnfolderBase]: 1957/2928 cut-off events. [2024-06-27 20:56:57,946 INFO L125 PetriNetUnfolderBase]: For 67885/67894 co-relation queries the response was YES. [2024-06-27 20:56:57,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17582 conditions, 2928 events. 1957/2928 cut-off events. For 67885/67894 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13445 event pairs, 469 based on Foata normal form. 8/2927 useless extension candidates. Maximal degree in co-relation 17529. Up to 2425 conditions per place. [2024-06-27 20:56:57,964 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 94 selfloop transitions, 70 changer transitions 0/167 dead transitions. [2024-06-27 20:56:57,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 167 transitions, 1903 flow [2024-06-27 20:56:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:56:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:56:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:56:57,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:56:57,966 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1256 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:56:57,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 167 transitions, 1903 flow [2024-06-27 20:56:58,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 167 transitions, 1810 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:58,027 INFO L231 Difference]: Finished difference. Result has 118 places, 136 transitions, 1352 flow [2024-06-27 20:56:58,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=118, PETRI_TRANSITIONS=136} [2024-06-27 20:56:58,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-27 20:56:58,028 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 136 transitions, 1352 flow [2024-06-27 20:56:58,028 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 20:56:58,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:58,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:58,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:56:58,029 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:56:58,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1228395932, now seen corresponding path program 1 times [2024-06-27 20:56:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:58,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303862954] [2024-06-27 20:56:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:58,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:58,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303862954] [2024-06-27 20:56:58,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303862954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:58,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:58,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:56:58,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383833207] [2024-06-27 20:56:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:58,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:56:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:56:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:56:58,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:58,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 136 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:58,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:58,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:58,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:56:58,834 INFO L124 PetriNetUnfolderBase]: 1962/2930 cut-off events. [2024-06-27 20:56:58,834 INFO L125 PetriNetUnfolderBase]: For 71087/71087 co-relation queries the response was YES. [2024-06-27 20:56:58,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17984 conditions, 2930 events. 1962/2930 cut-off events. For 71087/71087 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13451 event pairs, 478 based on Foata normal form. 1/2929 useless extension candidates. Maximal degree in co-relation 17930. Up to 2884 conditions per place. [2024-06-27 20:56:58,853 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 138 selfloop transitions, 19 changer transitions 0/160 dead transitions. [2024-06-27 20:56:58,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1826 flow [2024-06-27 20:56:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:56:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:56:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 20:56:58,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-27 20:56:58,855 INFO L175 Difference]: Start difference. First operand has 118 places, 136 transitions, 1352 flow. Second operand 6 states and 97 transitions. [2024-06-27 20:56:58,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1826 flow [2024-06-27 20:56:58,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 160 transitions, 1660 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:56:58,925 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1315 flow [2024-06-27 20:56:58,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1315, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-27 20:56:58,926 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-27 20:56:58,926 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1315 flow [2024-06-27 20:56:58,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:56:58,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:56:58,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:56:58,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:56:58,927 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 20:56:58,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:56:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -720414824, now seen corresponding path program 4 times [2024-06-27 20:56:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:56:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933992690] [2024-06-27 20:56:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:56:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:56:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:56:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:56:59,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:56:59,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933992690] [2024-06-27 20:56:59,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933992690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:56:59,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:56:59,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:56:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256487454] [2024-06-27 20:56:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:56:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:56:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:56:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:56:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:56:59,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:56:59,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1315 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 20:56:59,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:56:59,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:56:59,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:00,306 INFO L124 PetriNetUnfolderBase]: 2046/3075 cut-off events. [2024-06-27 20:57:00,306 INFO L125 PetriNetUnfolderBase]: For 84848/84857 co-relation queries the response was YES. [2024-06-27 20:57:00,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18650 conditions, 3075 events. 2046/3075 cut-off events. For 84848/84857 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14307 event pairs, 494 based on Foata normal form. 32/3098 useless extension candidates. Maximal degree in co-relation 18594. Up to 2416 conditions per place. [2024-06-27 20:57:00,327 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 111 selfloop transitions, 69 changer transitions 0/183 dead transitions. [2024-06-27 20:57:00,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 183 transitions, 2039 flow [2024-06-27 20:57:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:00,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:00,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:57:00,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-27 20:57:00,328 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1315 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:57:00,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 183 transitions, 2039 flow [2024-06-27 20:57:00,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 183 transitions, 2017 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 20:57:00,400 INFO L231 Difference]: Finished difference. Result has 126 places, 148 transitions, 1500 flow [2024-06-27 20:57:00,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1500, PETRI_PLACES=126, PETRI_TRANSITIONS=148} [2024-06-27 20:57:00,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-27 20:57:00,401 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 148 transitions, 1500 flow [2024-06-27 20:57:00,401 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 20:57:00,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:00,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:00,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:57:00,402 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 20:57:00,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash -492335734, now seen corresponding path program 4 times [2024-06-27 20:57:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198162263] [2024-06-27 20:57:00,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:00,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:00,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198162263] [2024-06-27 20:57:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198162263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:00,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:00,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:00,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147929162] [2024-06-27 20:57:00,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:00,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:00,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:00,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:00,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:00,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:00,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 148 transitions, 1500 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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 20:57:00,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:01,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:01,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:01,433 INFO L124 PetriNetUnfolderBase]: 2036/3061 cut-off events. [2024-06-27 20:57:01,434 INFO L125 PetriNetUnfolderBase]: For 83634/83643 co-relation queries the response was YES. [2024-06-27 20:57:01,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3061 events. 2036/3061 cut-off events. For 83634/83643 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14287 event pairs, 492 based on Foata normal form. 8/3060 useless extension candidates. Maximal degree in co-relation 19289. Up to 2712 conditions per place. [2024-06-27 20:57:01,457 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 120 selfloop transitions, 51 changer transitions 0/174 dead transitions. [2024-06-27 20:57:01,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 174 transitions, 1945 flow [2024-06-27 20:57:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:57:01,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-27 20:57:01,459 INFO L175 Difference]: Start difference. First operand has 126 places, 148 transitions, 1500 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:57:01,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 174 transitions, 1945 flow [2024-06-27 20:57:01,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 174 transitions, 1757 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:01,541 INFO L231 Difference]: Finished difference. Result has 129 places, 152 transitions, 1508 flow [2024-06-27 20:57:01,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1508, PETRI_PLACES=129, PETRI_TRANSITIONS=152} [2024-06-27 20:57:01,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-27 20:57:01,542 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 152 transitions, 1508 flow [2024-06-27 20:57:01,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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 20:57:01,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:01,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:01,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:57:01,542 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 20:57:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash -492328976, now seen corresponding path program 1 times [2024-06-27 20:57:01,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:01,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342548341] [2024-06-27 20:57:01,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:01,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:02,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342548341] [2024-06-27 20:57:02,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342548341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:02,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:02,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:02,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822166713] [2024-06-27 20:57:02,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:02,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:02,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:02,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:02,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:02,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 152 transitions, 1508 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 20:57:02,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:02,727 INFO L124 PetriNetUnfolderBase]: 2053/3085 cut-off events. [2024-06-27 20:57:02,727 INFO L125 PetriNetUnfolderBase]: For 87350/87368 co-relation queries the response was YES. [2024-06-27 20:57:02,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19506 conditions, 3085 events. 2053/3085 cut-off events. For 87350/87368 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14400 event pairs, 503 based on Foata normal form. 16/3095 useless extension candidates. Maximal degree in co-relation 19444. Up to 2949 conditions per place. [2024-06-27 20:57:02,744 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 29 changer transitions 0/178 dead transitions. [2024-06-27 20:57:02,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 178 transitions, 1970 flow [2024-06-27 20:57:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:57:02,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:57:02,746 INFO L175 Difference]: Start difference. First operand has 129 places, 152 transitions, 1508 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:57:02,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 178 transitions, 1970 flow [2024-06-27 20:57:02,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1899 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:02,822 INFO L231 Difference]: Finished difference. Result has 133 places, 154 transitions, 1546 flow [2024-06-27 20:57:02,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1546, PETRI_PLACES=133, PETRI_TRANSITIONS=154} [2024-06-27 20:57:02,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-27 20:57:02,823 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 154 transitions, 1546 flow [2024-06-27 20:57:02,823 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 20:57:02,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:02,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:02,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:57:02,823 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 20:57:02,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -483758096, now seen corresponding path program 2 times [2024-06-27 20:57:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:02,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785551083] [2024-06-27 20:57:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:02,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:03,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:03,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785551083] [2024-06-27 20:57:03,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785551083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:03,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:03,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310754373] [2024-06-27 20:57:03,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:03,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:03,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:03,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 154 transitions, 1546 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 20:57:03,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:03,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:03,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:04,052 INFO L124 PetriNetUnfolderBase]: 2070/3112 cut-off events. [2024-06-27 20:57:04,052 INFO L125 PetriNetUnfolderBase]: For 94375/94393 co-relation queries the response was YES. [2024-06-27 20:57:04,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 3112 events. 2070/3112 cut-off events. For 94375/94393 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14606 event pairs, 468 based on Foata normal form. 16/3122 useless extension candidates. Maximal degree in co-relation 19904. Up to 2866 conditions per place. [2024-06-27 20:57:04,076 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 143 selfloop transitions, 39 changer transitions 0/185 dead transitions. [2024-06-27 20:57:04,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 185 transitions, 2186 flow [2024-06-27 20:57:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:04,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:57:04,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:57:04,078 INFO L175 Difference]: Start difference. First operand has 133 places, 154 transitions, 1546 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:57:04,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 185 transitions, 2186 flow [2024-06-27 20:57:04,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 185 transitions, 2095 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:04,176 INFO L231 Difference]: Finished difference. Result has 135 places, 158 transitions, 1632 flow [2024-06-27 20:57:04,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1632, PETRI_PLACES=135, PETRI_TRANSITIONS=158} [2024-06-27 20:57:04,177 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-27 20:57:04,177 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 158 transitions, 1632 flow [2024-06-27 20:57:04,177 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 20:57:04,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:04,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:57:04,178 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 20:57:04,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:04,178 INFO L85 PathProgramCache]: Analyzing trace with hash -484054766, now seen corresponding path program 3 times [2024-06-27 20:57:04,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:04,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192607235] [2024-06-27 20:57:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:04,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:04,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:04,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192607235] [2024-06-27 20:57:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192607235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:04,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:04,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625848987] [2024-06-27 20:57:04,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:04,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:04,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:04,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 158 transitions, 1632 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 20:57:04,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:04,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:04,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:05,455 INFO L124 PetriNetUnfolderBase]: 2062/3100 cut-off events. [2024-06-27 20:57:05,456 INFO L125 PetriNetUnfolderBase]: For 99329/99347 co-relation queries the response was YES. [2024-06-27 20:57:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20087 conditions, 3100 events. 2062/3100 cut-off events. For 99329/99347 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14504 event pairs, 501 based on Foata normal form. 16/3110 useless extension candidates. Maximal degree in co-relation 20023. Up to 2919 conditions per place. [2024-06-27 20:57:05,476 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 38 changer transitions 0/186 dead transitions. [2024-06-27 20:57:05,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 186 transitions, 2082 flow [2024-06-27 20:57:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:05,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:05,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 20:57:05,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-06-27 20:57:05,478 INFO L175 Difference]: Start difference. First operand has 135 places, 158 transitions, 1632 flow. Second operand 9 states and 142 transitions. [2024-06-27 20:57:05,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 186 transitions, 2082 flow [2024-06-27 20:57:05,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 186 transitions, 1974 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:05,576 INFO L231 Difference]: Finished difference. Result has 140 places, 158 transitions, 1610 flow [2024-06-27 20:57:05,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1610, PETRI_PLACES=140, PETRI_TRANSITIONS=158} [2024-06-27 20:57:05,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-27 20:57:05,577 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 158 transitions, 1610 flow [2024-06-27 20:57:05,577 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 20:57:05,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:57:05,578 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:05,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1809648722, now seen corresponding path program 2 times [2024-06-27 20:57:05,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:05,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395242076] [2024-06-27 20:57:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:05,979 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 20:57:05,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:05,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395242076] [2024-06-27 20:57:05,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395242076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:05,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:05,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:57:05,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445800325] [2024-06-27 20:57:05,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:05,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:57:05,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:05,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:57:05,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:57:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:06,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 158 transitions, 1610 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:06,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:06,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:06,543 INFO L124 PetriNetUnfolderBase]: 2069/3108 cut-off events. [2024-06-27 20:57:06,543 INFO L125 PetriNetUnfolderBase]: For 102650/102650 co-relation queries the response was YES. [2024-06-27 20:57:06,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20287 conditions, 3108 events. 2069/3108 cut-off events. For 102650/102650 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14568 event pairs, 499 based on Foata normal form. 3/3109 useless extension candidates. Maximal degree in co-relation 20221. Up to 3054 conditions per place. [2024-06-27 20:57:06,566 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 149 selfloop transitions, 23 changer transitions 0/175 dead transitions. [2024-06-27 20:57:06,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 175 transitions, 2034 flow [2024-06-27 20:57:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:57:06,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:57:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-06-27 20:57:06,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445 [2024-06-27 20:57:06,574 INFO L175 Difference]: Start difference. First operand has 140 places, 158 transitions, 1610 flow. Second operand 5 states and 89 transitions. [2024-06-27 20:57:06,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 175 transitions, 2034 flow [2024-06-27 20:57:06,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 1940 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:06,687 INFO L231 Difference]: Finished difference. Result has 137 places, 161 transitions, 1622 flow [2024-06-27 20:57:06,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1622, PETRI_PLACES=137, PETRI_TRANSITIONS=161} [2024-06-27 20:57:06,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-27 20:57:06,694 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 161 transitions, 1622 flow [2024-06-27 20:57:06,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:06,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:06,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:06,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:57:06,695 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 20:57:06,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1364048324, now seen corresponding path program 1 times [2024-06-27 20:57:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:06,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21250782] [2024-06-27 20:57:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:06,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:07,364 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 20:57:07,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:07,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21250782] [2024-06-27 20:57:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21250782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:07,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975886806] [2024-06-27 20:57:07,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:07,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:07,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:07,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:07,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 161 transitions, 1622 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 20:57:07,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:07,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:07,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:07,964 INFO L124 PetriNetUnfolderBase]: 2086/3137 cut-off events. [2024-06-27 20:57:07,964 INFO L125 PetriNetUnfolderBase]: For 109239/109260 co-relation queries the response was YES. [2024-06-27 20:57:07,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20824 conditions, 3137 events. 2086/3137 cut-off events. For 109239/109260 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14732 event pairs, 349 based on Foata normal form. 18/3149 useless extension candidates. Maximal degree in co-relation 20757. Up to 2989 conditions per place. [2024-06-27 20:57:07,987 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 168 selfloop transitions, 21 changer transitions 0/192 dead transitions. [2024-06-27 20:57:07,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 192 transitions, 2130 flow [2024-06-27 20:57:07,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:57:07,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:57:07,989 INFO L175 Difference]: Start difference. First operand has 137 places, 161 transitions, 1622 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:57:07,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 192 transitions, 2130 flow [2024-06-27 20:57:08,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 192 transitions, 2082 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:08,122 INFO L231 Difference]: Finished difference. Result has 142 places, 163 transitions, 1671 flow [2024-06-27 20:57:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1671, PETRI_PLACES=142, PETRI_TRANSITIONS=163} [2024-06-27 20:57:08,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-27 20:57:08,123 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 163 transitions, 1671 flow [2024-06-27 20:57:08,123 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 20:57:08,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:08,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:57:08,124 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 20:57:08,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash -799623040, now seen corresponding path program 2 times [2024-06-27 20:57:08,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:08,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944481008] [2024-06-27 20:57:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:08,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:08,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944481008] [2024-06-27 20:57:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944481008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:08,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:08,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:08,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121942344] [2024-06-27 20:57:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:08,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:08,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:08,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:08,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:08,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 163 transitions, 1671 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 20:57:08,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:08,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:08,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:09,555 INFO L124 PetriNetUnfolderBase]: 2128/3203 cut-off events. [2024-06-27 20:57:09,555 INFO L125 PetriNetUnfolderBase]: For 119253/119274 co-relation queries the response was YES. [2024-06-27 20:57:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21775 conditions, 3203 events. 2128/3203 cut-off events. For 119253/119274 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15204 event pairs, 462 based on Foata normal form. 18/3215 useless extension candidates. Maximal degree in co-relation 21707. Up to 2997 conditions per place. [2024-06-27 20:57:09,576 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 31 changer transitions 0/198 dead transitions. [2024-06-27 20:57:09,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 198 transitions, 2373 flow [2024-06-27 20:57:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:57:09,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:57:09,577 INFO L175 Difference]: Start difference. First operand has 142 places, 163 transitions, 1671 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:57:09,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 198 transitions, 2373 flow [2024-06-27 20:57:09,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 2294 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:09,680 INFO L231 Difference]: Finished difference. Result has 144 places, 167 transitions, 1761 flow [2024-06-27 20:57:09,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1761, PETRI_PLACES=144, PETRI_TRANSITIONS=167} [2024-06-27 20:57:09,681 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-27 20:57:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 167 transitions, 1761 flow [2024-06-27 20:57:09,681 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 20:57:09,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:09,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:09,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:57:09,681 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 20:57:09,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -799619165, now seen corresponding path program 1 times [2024-06-27 20:57:09,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:09,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320468111] [2024-06-27 20:57:09,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:09,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:10,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:10,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320468111] [2024-06-27 20:57:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320468111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:10,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747131819] [2024-06-27 20:57:10,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:10,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:10,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:10,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 167 transitions, 1761 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 20:57:10,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:10,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:10,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:11,230 INFO L124 PetriNetUnfolderBase]: 2123/3196 cut-off events. [2024-06-27 20:57:11,231 INFO L125 PetriNetUnfolderBase]: For 125643/125664 co-relation queries the response was YES. [2024-06-27 20:57:11,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21979 conditions, 3196 events. 2123/3196 cut-off events. For 125643/125664 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15138 event pairs, 459 based on Foata normal form. 16/3206 useless extension candidates. Maximal degree in co-relation 21910. Up to 3033 conditions per place. [2024-06-27 20:57:11,258 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 33 changer transitions 0/196 dead transitions. [2024-06-27 20:57:11,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 196 transitions, 2239 flow [2024-06-27 20:57:11,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:57:11,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 20:57:11,264 INFO L175 Difference]: Start difference. First operand has 144 places, 167 transitions, 1761 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:57:11,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 196 transitions, 2239 flow [2024-06-27 20:57:11,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2143 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:11,419 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1743 flow [2024-06-27 20:57:11,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1743, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-27 20:57:11,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 20:57:11,420 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1743 flow [2024-06-27 20:57:11,420 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 20:57:11,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:11,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:11,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:57:11,421 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 20:57:11,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:11,421 INFO L85 PathProgramCache]: Analyzing trace with hash -799619320, now seen corresponding path program 3 times [2024-06-27 20:57:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616116108] [2024-06-27 20:57:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:12,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:12,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:12,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616116108] [2024-06-27 20:57:12,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616116108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:12,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:12,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:12,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627563062] [2024-06-27 20:57:12,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:12,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:12,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:12,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:12,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:12,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:12,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1743 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 20:57:12,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:12,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:12,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:12,835 INFO L124 PetriNetUnfolderBase]: 2115/3184 cut-off events. [2024-06-27 20:57:12,835 INFO L125 PetriNetUnfolderBase]: For 130011/130032 co-relation queries the response was YES. [2024-06-27 20:57:12,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21938 conditions, 3184 events. 2115/3184 cut-off events. For 130011/130032 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15080 event pairs, 457 based on Foata normal form. 18/3196 useless extension candidates. Maximal degree in co-relation 21867. Up to 3030 conditions per place. [2024-06-27 20:57:12,857 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 29 changer transitions 0/196 dead transitions. [2024-06-27 20:57:12,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 196 transitions, 2219 flow [2024-06-27 20:57:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:12,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:57:12,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:57:12,859 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1743 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:57:12,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 196 transitions, 2219 flow [2024-06-27 20:57:12,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 196 transitions, 2042 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:12,977 INFO L231 Difference]: Finished difference. Result has 148 places, 167 transitions, 1632 flow [2024-06-27 20:57:12,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1632, PETRI_PLACES=148, PETRI_TRANSITIONS=167} [2024-06-27 20:57:12,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 107 predicate places. [2024-06-27 20:57:12,978 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 167 transitions, 1632 flow [2024-06-27 20:57:12,978 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 20:57:12,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:12,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:12,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:57:12,979 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 20:57:12,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:12,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1782296414, now seen corresponding path program 1 times [2024-06-27 20:57:12,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:12,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310387852] [2024-06-27 20:57:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:12,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310387852] [2024-06-27 20:57:13,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310387852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:13,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:13,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:13,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703713647] [2024-06-27 20:57:13,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:13,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:13,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:13,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:13,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 167 transitions, 1632 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 20:57:13,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:13,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:13,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:14,320 INFO L124 PetriNetUnfolderBase]: 2207/3338 cut-off events. [2024-06-27 20:57:14,320 INFO L125 PetriNetUnfolderBase]: For 140954/140981 co-relation queries the response was YES. [2024-06-27 20:57:14,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22523 conditions, 3338 events. 2207/3338 cut-off events. For 140954/140981 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16119 event pairs, 475 based on Foata normal form. 38/3368 useless extension candidates. Maximal degree in co-relation 22451. Up to 3062 conditions per place. [2024-06-27 20:57:14,342 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 177 selfloop transitions, 28 changer transitions 0/208 dead transitions. [2024-06-27 20:57:14,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 208 transitions, 2220 flow [2024-06-27 20:57:14,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:14,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:57:14,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 20:57:14,345 INFO L175 Difference]: Start difference. First operand has 148 places, 167 transitions, 1632 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:57:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 208 transitions, 2220 flow [2024-06-27 20:57:14,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 208 transitions, 2150 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:14,467 INFO L231 Difference]: Finished difference. Result has 150 places, 170 transitions, 1684 flow [2024-06-27 20:57:14,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1684, PETRI_PLACES=150, PETRI_TRANSITIONS=170} [2024-06-27 20:57:14,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 20:57:14,468 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 170 transitions, 1684 flow [2024-06-27 20:57:14,468 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 20:57:14,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:14,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:14,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:57:14,468 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:14,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:14,469 INFO L85 PathProgramCache]: Analyzing trace with hash 597789520, now seen corresponding path program 1 times [2024-06-27 20:57:14,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:14,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370788554] [2024-06-27 20:57:14,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:14,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:14,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:14,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:14,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370788554] [2024-06-27 20:57:14,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370788554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:14,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:14,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:14,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163889916] [2024-06-27 20:57:14,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:14,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:14,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:14,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:14,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:14,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:14,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 170 transitions, 1684 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:14,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:14,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:14,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:15,506 INFO L124 PetriNetUnfolderBase]: 2217/3348 cut-off events. [2024-06-27 20:57:15,507 INFO L125 PetriNetUnfolderBase]: For 137818/137818 co-relation queries the response was YES. [2024-06-27 20:57:15,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22859 conditions, 3348 events. 2217/3348 cut-off events. For 137818/137818 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16141 event pairs, 485 based on Foata normal form. 2/3348 useless extension candidates. Maximal degree in co-relation 22786. Up to 3248 conditions per place. [2024-06-27 20:57:15,533 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 169 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-27 20:57:15,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 200 transitions, 2278 flow [2024-06-27 20:57:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:57:15,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 20:57:15,535 INFO L175 Difference]: Start difference. First operand has 150 places, 170 transitions, 1684 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:57:15,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 200 transitions, 2278 flow [2024-06-27 20:57:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 200 transitions, 2208 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:15,671 INFO L231 Difference]: Finished difference. Result has 150 places, 176 transitions, 1739 flow [2024-06-27 20:57:15,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1739, PETRI_PLACES=150, PETRI_TRANSITIONS=176} [2024-06-27 20:57:15,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-27 20:57:15,672 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 176 transitions, 1739 flow [2024-06-27 20:57:15,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:15,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:15,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:15,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:57:15,673 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:15,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:15,673 INFO L85 PathProgramCache]: Analyzing trace with hash 737398510, now seen corresponding path program 2 times [2024-06-27 20:57:15,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:15,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661456838] [2024-06-27 20:57:15,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:15,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:16,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:16,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661456838] [2024-06-27 20:57:16,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661456838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:16,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:16,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:16,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188143290] [2024-06-27 20:57:16,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:16,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:16,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:16,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:16,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 176 transitions, 1739 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:16,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:16,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:16,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:16,844 INFO L124 PetriNetUnfolderBase]: 2411/3671 cut-off events. [2024-06-27 20:57:16,845 INFO L125 PetriNetUnfolderBase]: For 172280/172289 co-relation queries the response was YES. [2024-06-27 20:57:16,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25807 conditions, 3671 events. 2411/3671 cut-off events. For 172280/172289 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18265 event pairs, 445 based on Foata normal form. 20/3682 useless extension candidates. Maximal degree in co-relation 25733. Up to 2623 conditions per place. [2024-06-27 20:57:16,878 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 79 changer transitions 0/215 dead transitions. [2024-06-27 20:57:16,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2519 flow [2024-06-27 20:57:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:57:16,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:57:16,879 INFO L175 Difference]: Start difference. First operand has 150 places, 176 transitions, 1739 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:57:16,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2519 flow [2024-06-27 20:57:17,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 215 transitions, 2473 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:17,038 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 1931 flow [2024-06-27 20:57:17,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1931, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2024-06-27 20:57:17,039 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-27 20:57:17,039 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 1931 flow [2024-06-27 20:57:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:17,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:17,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:57:17,040 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 20:57:17,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1797294046, now seen corresponding path program 3 times [2024-06-27 20:57:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:17,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77840685] [2024-06-27 20:57:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:17,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77840685] [2024-06-27 20:57:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77840685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:17,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007986299] [2024-06-27 20:57:17,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:17,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:17,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:17,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 1931 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:17,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:17,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:17,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:18,203 INFO L124 PetriNetUnfolderBase]: 2503/3823 cut-off events. [2024-06-27 20:57:18,203 INFO L125 PetriNetUnfolderBase]: For 191186/191195 co-relation queries the response was YES. [2024-06-27 20:57:18,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27418 conditions, 3823 events. 2503/3823 cut-off events. For 191186/191195 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 19393 event pairs, 537 based on Foata normal form. 28/3842 useless extension candidates. Maximal degree in co-relation 27342. Up to 3190 conditions per place. [2024-06-27 20:57:18,236 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 132 selfloop transitions, 76 changer transitions 0/211 dead transitions. [2024-06-27 20:57:18,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 211 transitions, 2511 flow [2024-06-27 20:57:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:18,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:57:18,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:57:18,238 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 1931 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:57:18,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 211 transitions, 2511 flow [2024-06-27 20:57:18,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 2398 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:18,390 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 2039 flow [2024-06-27 20:57:18,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1818, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2039, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-06-27 20:57:18,390 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-27 20:57:18,390 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 2039 flow [2024-06-27 20:57:18,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:18,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:18,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:18,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:57:18,391 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 20:57:18,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1791579754, now seen corresponding path program 4 times [2024-06-27 20:57:18,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:18,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880470395] [2024-06-27 20:57:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:18,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:18,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:19,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:19,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880470395] [2024-06-27 20:57:19,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880470395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:19,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:19,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:19,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616059791] [2024-06-27 20:57:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:19,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:19,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:19,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 2039 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 20:57:19,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:19,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:19,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:19,845 INFO L124 PetriNetUnfolderBase]: 2495/3811 cut-off events. [2024-06-27 20:57:19,845 INFO L125 PetriNetUnfolderBase]: For 183881/183890 co-relation queries the response was YES. [2024-06-27 20:57:19,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27695 conditions, 3811 events. 2495/3811 cut-off events. For 183881/183890 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19378 event pairs, 526 based on Foata normal form. 8/3810 useless extension candidates. Maximal degree in co-relation 27617. Up to 3298 conditions per place. [2024-06-27 20:57:19,876 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 75 changer transitions 0/209 dead transitions. [2024-06-27 20:57:19,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 209 transitions, 2595 flow [2024-06-27 20:57:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:57:19,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:57:19,878 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 2039 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:57:19,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 209 transitions, 2595 flow [2024-06-27 20:57:20,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2408 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:20,093 INFO L231 Difference]: Finished difference. Result has 161 places, 182 transitions, 2073 flow [2024-06-27 20:57:20,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2073, PETRI_PLACES=161, PETRI_TRANSITIONS=182} [2024-06-27 20:57:20,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-27 20:57:20,094 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 182 transitions, 2073 flow [2024-06-27 20:57:20,094 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 20:57:20,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:20,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:20,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:57:20,095 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 20:57:20,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1791729856, now seen corresponding path program 4 times [2024-06-27 20:57:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:20,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811145215] [2024-06-27 20:57:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:20,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:20,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811145215] [2024-06-27 20:57:20,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811145215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:20,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:20,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953412208] [2024-06-27 20:57:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:20,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:20,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 182 transitions, 2073 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 20:57:20,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:20,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:20,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:21,647 INFO L124 PetriNetUnfolderBase]: 2570/3936 cut-off events. [2024-06-27 20:57:21,647 INFO L125 PetriNetUnfolderBase]: For 204504/204513 co-relation queries the response was YES. [2024-06-27 20:57:21,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 3936 events. 2570/3936 cut-off events. For 204504/204513 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20279 event pairs, 565 based on Foata normal form. 24/3951 useless extension candidates. Maximal degree in co-relation 28380. Up to 3458 conditions per place. [2024-06-27 20:57:21,680 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 163 selfloop transitions, 53 changer transitions 0/219 dead transitions. [2024-06-27 20:57:21,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 219 transitions, 2671 flow [2024-06-27 20:57:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 20:57:21,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 20:57:21,682 INFO L175 Difference]: Start difference. First operand has 161 places, 182 transitions, 2073 flow. Second operand 9 states and 152 transitions. [2024-06-27 20:57:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 219 transitions, 2671 flow [2024-06-27 20:57:21,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 219 transitions, 2470 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:21,898 INFO L231 Difference]: Finished difference. Result has 164 places, 183 transitions, 2032 flow [2024-06-27 20:57:21,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2032, PETRI_PLACES=164, PETRI_TRANSITIONS=183} [2024-06-27 20:57:21,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-27 20:57:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 183 transitions, 2032 flow [2024-06-27 20:57:21,899 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 20:57:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:21,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:57:21,900 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 20:57:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1791576034, now seen corresponding path program 5 times [2024-06-27 20:57:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948999087] [2024-06-27 20:57:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948999087] [2024-06-27 20:57:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948999087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:22,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:22,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:22,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516350934] [2024-06-27 20:57:22,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:22,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:22,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:22,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:22,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 183 transitions, 2032 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 20:57:22,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:22,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:22,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:23,493 INFO L124 PetriNetUnfolderBase]: 2562/3924 cut-off events. [2024-06-27 20:57:23,493 INFO L125 PetriNetUnfolderBase]: For 198409/198418 co-relation queries the response was YES. [2024-06-27 20:57:23,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28231 conditions, 3924 events. 2562/3924 cut-off events. For 198409/198418 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20150 event pairs, 548 based on Foata normal form. 8/3923 useless extension candidates. Maximal degree in co-relation 28151. Up to 3066 conditions per place. [2024-06-27 20:57:23,525 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 131 selfloop transitions, 82 changer transitions 0/216 dead transitions. [2024-06-27 20:57:23,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 216 transitions, 2624 flow [2024-06-27 20:57:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:57:23,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 20:57:23,530 INFO L175 Difference]: Start difference. First operand has 164 places, 183 transitions, 2032 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:57:23,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 216 transitions, 2624 flow [2024-06-27 20:57:23,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2510 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:23,749 INFO L231 Difference]: Finished difference. Result has 166 places, 185 transitions, 2154 flow [2024-06-27 20:57:23,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1918, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2154, PETRI_PLACES=166, PETRI_TRANSITIONS=185} [2024-06-27 20:57:23,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-27 20:57:23,751 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 185 transitions, 2154 flow [2024-06-27 20:57:23,751 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 20:57:23,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:23,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:23,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:57:23,751 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 20:57:23,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1428356054, now seen corresponding path program 5 times [2024-06-27 20:57:23,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:23,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029662105] [2024-06-27 20:57:23,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:23,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:23,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:24,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:24,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029662105] [2024-06-27 20:57:24,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029662105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:24,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:24,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:57:24,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64820379] [2024-06-27 20:57:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:24,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:57:24,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:24,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:57:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:57:24,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:24,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 185 transitions, 2154 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 20:57:24,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:24,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:24,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:25,408 INFO L124 PetriNetUnfolderBase]: 2587/3971 cut-off events. [2024-06-27 20:57:25,408 INFO L125 PetriNetUnfolderBase]: For 213038/213047 co-relation queries the response was YES. [2024-06-27 20:57:25,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28477 conditions, 3971 events. 2587/3971 cut-off events. For 213038/213047 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20499 event pairs, 487 based on Foata normal form. 24/3986 useless extension candidates. Maximal degree in co-relation 28396. Up to 2904 conditions per place. [2024-06-27 20:57:25,441 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 142 selfloop transitions, 77 changer transitions 0/222 dead transitions. [2024-06-27 20:57:25,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2758 flow [2024-06-27 20:57:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:25,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:25,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:57:25,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 20:57:25,443 INFO L175 Difference]: Start difference. First operand has 166 places, 185 transitions, 2154 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:57:25,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2758 flow [2024-06-27 20:57:25,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 222 transitions, 2542 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:25,672 INFO L231 Difference]: Finished difference. Result has 169 places, 186 transitions, 2160 flow [2024-06-27 20:57:25,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2160, PETRI_PLACES=169, PETRI_TRANSITIONS=186} [2024-06-27 20:57:25,672 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-27 20:57:25,672 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 186 transitions, 2160 flow [2024-06-27 20:57:25,673 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 20:57:25,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:25,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:25,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:57:25,673 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:25,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:25,673 INFO L85 PathProgramCache]: Analyzing trace with hash -536000528, now seen corresponding path program 1 times [2024-06-27 20:57:25,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:25,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243100758] [2024-06-27 20:57:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:25,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:25,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:26,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:26,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243100758] [2024-06-27 20:57:26,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243100758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:26,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:26,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414833756] [2024-06-27 20:57:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:26,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:26,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:26,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:26,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 186 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:26,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:26,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:26,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:26,861 INFO L124 PetriNetUnfolderBase]: 2597/3980 cut-off events. [2024-06-27 20:57:26,861 INFO L125 PetriNetUnfolderBase]: For 206635/206635 co-relation queries the response was YES. [2024-06-27 20:57:26,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28785 conditions, 3980 events. 2597/3980 cut-off events. For 206635/206635 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20631 event pairs, 595 based on Foata normal form. 2/3980 useless extension candidates. Maximal degree in co-relation 28703. Up to 3906 conditions per place. [2024-06-27 20:57:26,896 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 176 selfloop transitions, 31 changer transitions 0/210 dead transitions. [2024-06-27 20:57:26,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 210 transitions, 2800 flow [2024-06-27 20:57:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:57:26,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:57:26,897 INFO L175 Difference]: Start difference. First operand has 169 places, 186 transitions, 2160 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:57:26,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 210 transitions, 2800 flow [2024-06-27 20:57:27,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 210 transitions, 2595 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:27,225 INFO L231 Difference]: Finished difference. Result has 168 places, 192 transitions, 2119 flow [2024-06-27 20:57:27,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1957, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=168, PETRI_TRANSITIONS=192} [2024-06-27 20:57:27,226 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-27 20:57:27,226 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 192 transitions, 2119 flow [2024-06-27 20:57:27,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:27,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:27,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:57:27,227 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:27,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:27,227 INFO L85 PathProgramCache]: Analyzing trace with hash 254359026, now seen corresponding path program 2 times [2024-06-27 20:57:27,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:27,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661086651] [2024-06-27 20:57:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661086651] [2024-06-27 20:57:27,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661086651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:27,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:27,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:27,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579348535] [2024-06-27 20:57:27,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:27,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:27,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:27,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:27,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 192 transitions, 2119 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:27,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:27,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:27,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:28,420 INFO L124 PetriNetUnfolderBase]: 2607/3994 cut-off events. [2024-06-27 20:57:28,420 INFO L125 PetriNetUnfolderBase]: For 203653/203653 co-relation queries the response was YES. [2024-06-27 20:57:28,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28427 conditions, 3994 events. 2607/3994 cut-off events. For 203653/203653 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20672 event pairs, 593 based on Foata normal form. 2/3994 useless extension candidates. Maximal degree in co-relation 28346. Up to 3890 conditions per place. [2024-06-27 20:57:28,458 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 182 selfloop transitions, 30 changer transitions 0/215 dead transitions. [2024-06-27 20:57:28,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 215 transitions, 2719 flow [2024-06-27 20:57:28,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:28,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:57:28,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-27 20:57:28,459 INFO L175 Difference]: Start difference. First operand has 168 places, 192 transitions, 2119 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:57:28,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 215 transitions, 2719 flow [2024-06-27 20:57:28,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 215 transitions, 2662 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:28,742 INFO L231 Difference]: Finished difference. Result has 172 places, 195 transitions, 2158 flow [2024-06-27 20:57:28,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2158, PETRI_PLACES=172, PETRI_TRANSITIONS=195} [2024-06-27 20:57:28,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-27 20:57:28,743 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 195 transitions, 2158 flow [2024-06-27 20:57:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:28,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:28,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:28,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:57:28,743 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 20:57:28,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1917463150, now seen corresponding path program 6 times [2024-06-27 20:57:28,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:28,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672225667] [2024-06-27 20:57:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:28,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:29,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672225667] [2024-06-27 20:57:29,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672225667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:29,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:29,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:29,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717979685] [2024-06-27 20:57:29,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:29,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:29,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:29,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:29,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:29,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 195 transitions, 2158 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:29,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:29,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:29,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:30,050 INFO L124 PetriNetUnfolderBase]: 2682/4124 cut-off events. [2024-06-27 20:57:30,050 INFO L125 PetriNetUnfolderBase]: For 230199/230208 co-relation queries the response was YES. [2024-06-27 20:57:30,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29394 conditions, 4124 events. 2682/4124 cut-off events. For 230199/230208 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 21603 event pairs, 576 based on Foata normal form. 24/4139 useless extension candidates. Maximal degree in co-relation 29311. Up to 3637 conditions per place. [2024-06-27 20:57:30,088 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 170 selfloop transitions, 54 changer transitions 0/227 dead transitions. [2024-06-27 20:57:30,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 227 transitions, 2754 flow [2024-06-27 20:57:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:57:30,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-27 20:57:30,089 INFO L175 Difference]: Start difference. First operand has 172 places, 195 transitions, 2158 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:57:30,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 227 transitions, 2754 flow [2024-06-27 20:57:30,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 227 transitions, 2696 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:30,348 INFO L231 Difference]: Finished difference. Result has 176 places, 196 transitions, 2260 flow [2024-06-27 20:57:30,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2260, PETRI_PLACES=176, PETRI_TRANSITIONS=196} [2024-06-27 20:57:30,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 135 predicate places. [2024-06-27 20:57:30,349 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 196 transitions, 2260 flow [2024-06-27 20:57:30,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:30,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:30,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:30,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:57:30,349 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 20:57:30,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:30,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1917672400, now seen corresponding path program 7 times [2024-06-27 20:57:30,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:30,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630947260] [2024-06-27 20:57:30,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:30,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:30,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:30,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630947260] [2024-06-27 20:57:30,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630947260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:30,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:30,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:30,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12912936] [2024-06-27 20:57:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:30,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:30,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:30,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:30,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:30,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:30,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 196 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:30,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:30,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:30,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:31,683 INFO L124 PetriNetUnfolderBase]: 2801/4325 cut-off events. [2024-06-27 20:57:31,683 INFO L125 PetriNetUnfolderBase]: For 252794/252803 co-relation queries the response was YES. [2024-06-27 20:57:31,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31543 conditions, 4325 events. 2801/4325 cut-off events. For 252794/252803 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 23023 event pairs, 610 based on Foata normal form. 20/4336 useless extension candidates. Maximal degree in co-relation 31459. Up to 3321 conditions per place. [2024-06-27 20:57:31,716 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 75 changer transitions 0/234 dead transitions. [2024-06-27 20:57:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 234 transitions, 3100 flow [2024-06-27 20:57:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:57:31,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-27 20:57:31,718 INFO L175 Difference]: Start difference. First operand has 176 places, 196 transitions, 2260 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:57:31,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 234 transitions, 3100 flow [2024-06-27 20:57:31,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 234 transitions, 2974 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:31,972 INFO L231 Difference]: Finished difference. Result has 178 places, 198 transitions, 2377 flow [2024-06-27 20:57:31,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2134, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2377, PETRI_PLACES=178, PETRI_TRANSITIONS=198} [2024-06-27 20:57:31,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-27 20:57:31,973 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 198 transitions, 2377 flow [2024-06-27 20:57:31,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:31,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:31,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:31,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:57:31,974 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 20:57:31,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2111597616, now seen corresponding path program 8 times [2024-06-27 20:57:31,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:31,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830317806] [2024-06-27 20:57:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:31,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:32,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:32,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:32,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830317806] [2024-06-27 20:57:32,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830317806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:32,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:32,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:32,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981053814] [2024-06-27 20:57:32,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:32,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:32,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:32,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:32,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:32,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:32,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 198 transitions, 2377 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:32,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:32,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:32,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:33,259 INFO L124 PetriNetUnfolderBase]: 2870/4448 cut-off events. [2024-06-27 20:57:33,259 INFO L125 PetriNetUnfolderBase]: For 269860/269869 co-relation queries the response was YES. [2024-06-27 20:57:33,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32654 conditions, 4448 events. 2870/4448 cut-off events. For 269860/269869 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23932 event pairs, 576 based on Foata normal form. 20/4459 useless extension candidates. Maximal degree in co-relation 32569. Up to 2312 conditions per place. [2024-06-27 20:57:33,299 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 86 changer transitions 0/236 dead transitions. [2024-06-27 20:57:33,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 3227 flow [2024-06-27 20:57:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:57:33,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-27 20:57:33,300 INFO L175 Difference]: Start difference. First operand has 178 places, 198 transitions, 2377 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:57:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 3227 flow [2024-06-27 20:57:33,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 236 transitions, 3112 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:33,642 INFO L231 Difference]: Finished difference. Result has 182 places, 200 transitions, 2530 flow [2024-06-27 20:57:33,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=182, PETRI_TRANSITIONS=200} [2024-06-27 20:57:33,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-27 20:57:33,643 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 200 transitions, 2530 flow [2024-06-27 20:57:33,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:33,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:33,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:33,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:57:33,643 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:33,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:33,644 INFO L85 PathProgramCache]: Analyzing trace with hash 264536016, now seen corresponding path program 3 times [2024-06-27 20:57:33,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841317460] [2024-06-27 20:57:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:34,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:34,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841317460] [2024-06-27 20:57:34,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841317460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:34,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:34,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:34,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555914540] [2024-06-27 20:57:34,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:34,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:34,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:34,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:34,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:34,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:34,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 200 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:34,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:34,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:34,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:34,846 INFO L124 PetriNetUnfolderBase]: 2884/4463 cut-off events. [2024-06-27 20:57:34,846 INFO L125 PetriNetUnfolderBase]: For 267215/267215 co-relation queries the response was YES. [2024-06-27 20:57:34,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33168 conditions, 4463 events. 2884/4463 cut-off events. For 267215/267215 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24144 event pairs, 694 based on Foata normal form. 6/4467 useless extension candidates. Maximal degree in co-relation 33081. Up to 4351 conditions per place. [2024-06-27 20:57:34,886 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 189 selfloop transitions, 34 changer transitions 0/226 dead transitions. [2024-06-27 20:57:34,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 226 transitions, 3090 flow [2024-06-27 20:57:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:57:34,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:57:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 20:57:34,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:57:34,888 INFO L175 Difference]: Start difference. First operand has 182 places, 200 transitions, 2530 flow. Second operand 6 states and 110 transitions. [2024-06-27 20:57:34,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 226 transitions, 3090 flow [2024-06-27 20:57:35,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 226 transitions, 2970 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:35,336 INFO L231 Difference]: Finished difference. Result has 184 places, 203 transitions, 2541 flow [2024-06-27 20:57:35,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2541, PETRI_PLACES=184, PETRI_TRANSITIONS=203} [2024-06-27 20:57:35,345 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-27 20:57:35,346 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 203 transitions, 2541 flow [2024-06-27 20:57:35,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:35,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:35,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:35,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:57:35,347 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:35,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:35,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1381001468, now seen corresponding path program 2 times [2024-06-27 20:57:35,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:35,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813291576] [2024-06-27 20:57:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:35,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:35,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:35,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813291576] [2024-06-27 20:57:35,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813291576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:35,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:35,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051871172] [2024-06-27 20:57:35,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:35,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:35,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:35,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:35,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 203 transitions, 2541 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:35,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:35,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:35,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:36,612 INFO L124 PetriNetUnfolderBase]: 2878/4455 cut-off events. [2024-06-27 20:57:36,613 INFO L125 PetriNetUnfolderBase]: For 265232/265232 co-relation queries the response was YES. [2024-06-27 20:57:36,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 4455 events. 2878/4455 cut-off events. For 265232/265232 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 24072 event pairs, 693 based on Foata normal form. 2/4455 useless extension candidates. Maximal degree in co-relation 33261. Up to 4395 conditions per place. [2024-06-27 20:57:36,651 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 190 selfloop transitions, 26 changer transitions 0/219 dead transitions. [2024-06-27 20:57:36,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 219 transitions, 3023 flow [2024-06-27 20:57:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:57:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:57:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:57:36,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-27 20:57:36,653 INFO L175 Difference]: Start difference. First operand has 184 places, 203 transitions, 2541 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:57:36,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 219 transitions, 3023 flow [2024-06-27 20:57:37,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 219 transitions, 2932 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 20:57:37,052 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2508 flow [2024-06-27 20:57:37,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2508, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-27 20:57:37,053 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-27 20:57:37,053 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2508 flow [2024-06-27 20:57:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:37,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:57:37,053 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:37,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1962599474, now seen corresponding path program 1 times [2024-06-27 20:57:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216371075] [2024-06-27 20:57:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:37,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:37,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216371075] [2024-06-27 20:57:37,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216371075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:37,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:37,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:37,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364014212] [2024-06-27 20:57:37,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:37,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:37,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:37,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2508 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:37,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:37,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:37,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:38,232 INFO L124 PetriNetUnfolderBase]: 2896/4482 cut-off events. [2024-06-27 20:57:38,233 INFO L125 PetriNetUnfolderBase]: For 274029/274050 co-relation queries the response was YES. [2024-06-27 20:57:38,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33692 conditions, 4482 events. 2896/4482 cut-off events. For 274029/274050 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 24199 event pairs, 695 based on Foata normal form. 16/4492 useless extension candidates. Maximal degree in co-relation 33602. Up to 4319 conditions per place. [2024-06-27 20:57:38,268 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 40 changer transitions 0/235 dead transitions. [2024-06-27 20:57:38,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 235 transitions, 3428 flow [2024-06-27 20:57:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:57:38,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:57:38,269 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2508 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:57:38,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 235 transitions, 3428 flow [2024-06-27 20:57:38,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 235 transitions, 3342 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:38,711 INFO L231 Difference]: Finished difference. Result has 189 places, 216 transitions, 2749 flow [2024-06-27 20:57:38,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2749, PETRI_PLACES=189, PETRI_TRANSITIONS=216} [2024-06-27 20:57:38,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-27 20:57:38,712 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 216 transitions, 2749 flow [2024-06-27 20:57:38,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:38,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:38,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:38,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:57:38,712 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:38,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:38,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1962719444, now seen corresponding path program 2 times [2024-06-27 20:57:38,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:38,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914833617] [2024-06-27 20:57:38,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:38,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:39,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:39,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914833617] [2024-06-27 20:57:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914833617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:39,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:39,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397914900] [2024-06-27 20:57:39,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:39,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:39,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:39,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:39,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 216 transitions, 2749 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:39,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:39,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:39,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:39,924 INFO L124 PetriNetUnfolderBase]: 2995/4619 cut-off events. [2024-06-27 20:57:39,924 INFO L125 PetriNetUnfolderBase]: For 300440/300440 co-relation queries the response was YES. [2024-06-27 20:57:39,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35844 conditions, 4619 events. 2995/4619 cut-off events. For 300440/300440 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24998 event pairs, 694 based on Foata normal form. 6/4623 useless extension candidates. Maximal degree in co-relation 35752. Up to 4513 conditions per place. [2024-06-27 20:57:39,967 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 218 selfloop transitions, 36 changer transitions 0/257 dead transitions. [2024-06-27 20:57:39,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 257 transitions, 3775 flow [2024-06-27 20:57:39,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:39,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:57:39,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:57:39,969 INFO L175 Difference]: Start difference. First operand has 189 places, 216 transitions, 2749 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:57:39,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 257 transitions, 3775 flow [2024-06-27 20:57:40,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 3635 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-27 20:57:40,591 INFO L231 Difference]: Finished difference. Result has 196 places, 236 transitions, 3084 flow [2024-06-27 20:57:40,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2647, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3084, PETRI_PLACES=196, PETRI_TRANSITIONS=236} [2024-06-27 20:57:40,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-27 20:57:40,592 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 236 transitions, 3084 flow [2024-06-27 20:57:40,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:40,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:40,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:57:40,592 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:40,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1380817142, now seen corresponding path program 3 times [2024-06-27 20:57:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586940857] [2024-06-27 20:57:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:40,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586940857] [2024-06-27 20:57:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586940857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:41,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929062423] [2024-06-27 20:57:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:41,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:41,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 236 transitions, 3084 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:41,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:41,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:41,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:41,841 INFO L124 PetriNetUnfolderBase]: 3081/4738 cut-off events. [2024-06-27 20:57:41,842 INFO L125 PetriNetUnfolderBase]: For 318333/318333 co-relation queries the response was YES. [2024-06-27 20:57:41,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37744 conditions, 4738 events. 3081/4738 cut-off events. For 318333/318333 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25617 event pairs, 706 based on Foata normal form. 6/4742 useless extension candidates. Maximal degree in co-relation 37649. Up to 4550 conditions per place. [2024-06-27 20:57:41,887 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 222 selfloop transitions, 56 changer transitions 0/281 dead transitions. [2024-06-27 20:57:41,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 281 transitions, 4168 flow [2024-06-27 20:57:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:57:41,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:57:41,889 INFO L175 Difference]: Start difference. First operand has 196 places, 236 transitions, 3084 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:57:41,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 281 transitions, 4168 flow [2024-06-27 20:57:42,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 281 transitions, 4000 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:42,503 INFO L231 Difference]: Finished difference. Result has 202 places, 256 transitions, 3479 flow [2024-06-27 20:57:42,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3479, PETRI_PLACES=202, PETRI_TRANSITIONS=256} [2024-06-27 20:57:42,503 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 161 predicate places. [2024-06-27 20:57:42,503 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 256 transitions, 3479 flow [2024-06-27 20:57:42,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:42,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:42,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:42,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:57:42,504 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:42,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:42,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1380570878, now seen corresponding path program 1 times [2024-06-27 20:57:42,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:42,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143146175] [2024-06-27 20:57:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:42,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:43,417 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 20:57:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:43,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143146175] [2024-06-27 20:57:43,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143146175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:43,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:43,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225002700] [2024-06-27 20:57:43,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:43,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:43,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:43,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:43,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 256 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:43,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:43,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:43,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:44,196 INFO L124 PetriNetUnfolderBase]: 3076/4732 cut-off events. [2024-06-27 20:57:44,196 INFO L125 PetriNetUnfolderBase]: For 326057/326057 co-relation queries the response was YES. [2024-06-27 20:57:44,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38423 conditions, 4732 events. 3076/4732 cut-off events. For 326057/326057 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25566 event pairs, 716 based on Foata normal form. 2/4732 useless extension candidates. Maximal degree in co-relation 38324. Up to 4702 conditions per place. [2024-06-27 20:57:44,243 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 251 selfloop transitions, 13 changer transitions 0/267 dead transitions. [2024-06-27 20:57:44,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 267 transitions, 4071 flow [2024-06-27 20:57:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:57:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:57:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-06-27 20:57:44,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:57:44,244 INFO L175 Difference]: Start difference. First operand has 202 places, 256 transitions, 3479 flow. Second operand 5 states and 80 transitions. [2024-06-27 20:57:44,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 267 transitions, 4071 flow [2024-06-27 20:57:44,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 267 transitions, 3933 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-06-27 20:57:44,791 INFO L231 Difference]: Finished difference. Result has 205 places, 258 transitions, 3414 flow [2024-06-27 20:57:44,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3341, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3414, PETRI_PLACES=205, PETRI_TRANSITIONS=258} [2024-06-27 20:57:44,792 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-27 20:57:44,792 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 258 transitions, 3414 flow [2024-06-27 20:57:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:44,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:44,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:44,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:57:44,792 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 20:57:44,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1598377293, now seen corresponding path program 1 times [2024-06-27 20:57:44,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:44,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184368195] [2024-06-27 20:57:44,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:44,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:45,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184368195] [2024-06-27 20:57:45,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184368195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:45,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:45,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:45,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623472239] [2024-06-27 20:57:45,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:45,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:45,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:45,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:45,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:45,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:45,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 258 transitions, 3414 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:45,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:45,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:45,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:46,378 INFO L124 PetriNetUnfolderBase]: 3056/4704 cut-off events. [2024-06-27 20:57:46,378 INFO L125 PetriNetUnfolderBase]: For 333115/333124 co-relation queries the response was YES. [2024-06-27 20:57:46,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37687 conditions, 4704 events. 3056/4704 cut-off events. For 333115/333124 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25215 event pairs, 560 based on Foata normal form. 16/4711 useless extension candidates. Maximal degree in co-relation 37586. Up to 4484 conditions per place. [2024-06-27 20:57:46,426 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 264 selfloop transitions, 20 changer transitions 0/287 dead transitions. [2024-06-27 20:57:46,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 287 transitions, 4068 flow [2024-06-27 20:57:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:57:46,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:57:46,428 INFO L175 Difference]: Start difference. First operand has 205 places, 258 transitions, 3414 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:57:46,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 287 transitions, 4068 flow [2024-06-27 20:57:46,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 287 transitions, 4011 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:57:46,984 INFO L231 Difference]: Finished difference. Result has 210 places, 258 transitions, 3403 flow [2024-06-27 20:57:46,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=210, PETRI_TRANSITIONS=258} [2024-06-27 20:57:46,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-27 20:57:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 258 transitions, 3403 flow [2024-06-27 20:57:46,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:46,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:46,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:57:46,985 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:46,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1255436147, now seen corresponding path program 2 times [2024-06-27 20:57:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:46,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166262209] [2024-06-27 20:57:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:46,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:47,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:47,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166262209] [2024-06-27 20:57:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166262209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725001902] [2024-06-27 20:57:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:47,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:47,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:47,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 258 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:47,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:47,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:47,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:48,697 INFO L124 PetriNetUnfolderBase]: 3036/4672 cut-off events. [2024-06-27 20:57:48,698 INFO L125 PetriNetUnfolderBase]: For 329807/329813 co-relation queries the response was YES. [2024-06-27 20:57:48,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37144 conditions, 4672 events. 3036/4672 cut-off events. For 329807/329813 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25149 event pairs, 608 based on Foata normal form. 14/4677 useless extension candidates. Maximal degree in co-relation 37042. Up to 4071 conditions per place. [2024-06-27 20:57:48,743 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 225 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-27 20:57:48,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 289 transitions, 4101 flow [2024-06-27 20:57:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:57:48,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:57:48,745 INFO L175 Difference]: Start difference. First operand has 210 places, 258 transitions, 3403 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:57:48,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 289 transitions, 4101 flow [2024-06-27 20:57:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 289 transitions, 3972 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:57:49,421 INFO L231 Difference]: Finished difference. Result has 212 places, 260 transitions, 3468 flow [2024-06-27 20:57:49,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3468, PETRI_PLACES=212, PETRI_TRANSITIONS=260} [2024-06-27 20:57:49,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 20:57:49,422 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 260 transitions, 3468 flow [2024-06-27 20:57:49,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:49,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:49,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:49,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:57:49,423 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:49,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1255320827, now seen corresponding path program 3 times [2024-06-27 20:57:49,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:49,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353579464] [2024-06-27 20:57:49,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:49,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:50,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:50,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353579464] [2024-06-27 20:57:50,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353579464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:50,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:50,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:50,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125733733] [2024-06-27 20:57:50,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:50,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:50,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:50,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:50,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:50,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:50,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 260 transitions, 3468 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:50,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:50,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:50,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:51,209 INFO L124 PetriNetUnfolderBase]: 3016/4640 cut-off events. [2024-06-27 20:57:51,209 INFO L125 PetriNetUnfolderBase]: For 328540/328546 co-relation queries the response was YES. [2024-06-27 20:57:51,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36402 conditions, 4640 events. 3016/4640 cut-off events. For 328540/328546 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 24921 event pairs, 604 based on Foata normal form. 14/4645 useless extension candidates. Maximal degree in co-relation 36299. Up to 4152 conditions per place. [2024-06-27 20:57:51,255 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 227 selfloop transitions, 59 changer transitions 0/289 dead transitions. [2024-06-27 20:57:51,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 4130 flow [2024-06-27 20:57:51,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:57:51,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-27 20:57:51,256 INFO L175 Difference]: Start difference. First operand has 212 places, 260 transitions, 3468 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:57:51,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 4130 flow [2024-06-27 20:57:51,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 3803 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 20:57:51,959 INFO L231 Difference]: Finished difference. Result has 212 places, 260 transitions, 3268 flow [2024-06-27 20:57:51,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3268, PETRI_PLACES=212, PETRI_TRANSITIONS=260} [2024-06-27 20:57:51,961 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-27 20:57:51,961 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 260 transitions, 3268 flow [2024-06-27 20:57:51,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:51,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:51,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:51,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:57:51,962 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:51,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1721289976, now seen corresponding path program 1 times [2024-06-27 20:57:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:51,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808049507] [2024-06-27 20:57:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:52,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:52,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808049507] [2024-06-27 20:57:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808049507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:52,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:52,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:52,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074578369] [2024-06-27 20:57:52,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:52,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:52,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:52,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 260 transitions, 3268 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:52,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:52,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:52,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:53,354 INFO L124 PetriNetUnfolderBase]: 3083/4734 cut-off events. [2024-06-27 20:57:53,354 INFO L125 PetriNetUnfolderBase]: For 327471/327471 co-relation queries the response was YES. [2024-06-27 20:57:53,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36118 conditions, 4734 events. 3083/4734 cut-off events. For 327471/327471 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25377 event pairs, 663 based on Foata normal form. 4/4736 useless extension candidates. Maximal degree in co-relation 36016. Up to 4500 conditions per place. [2024-06-27 20:57:53,400 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 251 selfloop transitions, 68 changer transitions 0/322 dead transitions. [2024-06-27 20:57:53,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 322 transitions, 4543 flow [2024-06-27 20:57:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:57:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:57:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:57:53,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-06-27 20:57:53,401 INFO L175 Difference]: Start difference. First operand has 212 places, 260 transitions, 3268 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:57:53,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 322 transitions, 4543 flow [2024-06-27 20:57:54,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 322 transitions, 4410 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:57:54,220 INFO L231 Difference]: Finished difference. Result has 219 places, 286 transitions, 3625 flow [2024-06-27 20:57:54,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3625, PETRI_PLACES=219, PETRI_TRANSITIONS=286} [2024-06-27 20:57:54,221 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-27 20:57:54,221 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 286 transitions, 3625 flow [2024-06-27 20:57:54,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:54,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:54,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:54,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:57:54,222 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:54,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:54,222 INFO L85 PathProgramCache]: Analyzing trace with hash 477888582, now seen corresponding path program 2 times [2024-06-27 20:57:54,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:54,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293665545] [2024-06-27 20:57:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:54,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:54,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:54,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293665545] [2024-06-27 20:57:54,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293665545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:54,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:54,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:57:54,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861180388] [2024-06-27 20:57:54,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:54,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:57:54,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:54,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:57:54,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:57:54,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:54,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 286 transitions, 3625 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:54,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:54,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:55,737 INFO L124 PetriNetUnfolderBase]: 3103/4762 cut-off events. [2024-06-27 20:57:55,737 INFO L125 PetriNetUnfolderBase]: For 340236/340236 co-relation queries the response was YES. [2024-06-27 20:57:55,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37383 conditions, 4762 events. 3103/4762 cut-off events. For 340236/340236 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25576 event pairs, 668 based on Foata normal form. 4/4764 useless extension candidates. Maximal degree in co-relation 37277. Up to 4516 conditions per place. [2024-06-27 20:57:55,792 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 249 selfloop transitions, 70 changer transitions 0/322 dead transitions. [2024-06-27 20:57:55,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 322 transitions, 4601 flow [2024-06-27 20:57:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:57:55,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:57:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:57:55,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:57:55,793 INFO L175 Difference]: Start difference. First operand has 219 places, 286 transitions, 3625 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:57:55,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 322 transitions, 4601 flow [2024-06-27 20:57:56,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 322 transitions, 4513 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-27 20:57:56,357 INFO L231 Difference]: Finished difference. Result has 225 places, 290 transitions, 3775 flow [2024-06-27 20:57:56,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3547, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3775, PETRI_PLACES=225, PETRI_TRANSITIONS=290} [2024-06-27 20:57:56,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-27 20:57:56,357 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 290 transitions, 3775 flow [2024-06-27 20:57:56,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:56,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:56,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:56,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:57:56,358 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:56,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash 481432719, now seen corresponding path program 1 times [2024-06-27 20:57:56,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:56,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476800316] [2024-06-27 20:57:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:56,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476800316] [2024-06-27 20:57:56,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476800316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:56,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:56,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:56,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895002462] [2024-06-27 20:57:56,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:56,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:56,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:56,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:56,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:56,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:56,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 290 transitions, 3775 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:56,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:56,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:56,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:57,563 INFO L124 PetriNetUnfolderBase]: 3124/4791 cut-off events. [2024-06-27 20:57:57,563 INFO L125 PetriNetUnfolderBase]: For 349822/349822 co-relation queries the response was YES. [2024-06-27 20:57:57,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38065 conditions, 4791 events. 3124/4791 cut-off events. For 349822/349822 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 25739 event pairs, 672 based on Foata normal form. 1/4790 useless extension candidates. Maximal degree in co-relation 37957. Up to 4712 conditions per place. [2024-06-27 20:57:57,612 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 283 selfloop transitions, 32 changer transitions 0/318 dead transitions. [2024-06-27 20:57:57,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 318 transitions, 4760 flow [2024-06-27 20:57:57,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:57:57,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:57:57,614 INFO L175 Difference]: Start difference. First operand has 225 places, 290 transitions, 3775 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:57:57,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 318 transitions, 4760 flow [2024-06-27 20:57:58,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 318 transitions, 4587 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 20:57:58,158 INFO L231 Difference]: Finished difference. Result has 227 places, 299 transitions, 3880 flow [2024-06-27 20:57:58,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3604, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3880, PETRI_PLACES=227, PETRI_TRANSITIONS=299} [2024-06-27 20:57:58,158 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-27 20:57:58,158 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 299 transitions, 3880 flow [2024-06-27 20:57:58,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:58,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:57:58,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:57:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:57:58,159 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:57:58,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:57:58,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1283560867, now seen corresponding path program 2 times [2024-06-27 20:57:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:57:58,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83129883] [2024-06-27 20:57:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:57:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:57:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:57:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:57:58,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:57:58,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83129883] [2024-06-27 20:57:58,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83129883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:57:58,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:57:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:57:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224464101] [2024-06-27 20:57:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:57:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:57:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:57:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:57:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:57:58,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:57:58,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 299 transitions, 3880 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:57:58,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:57:58,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:57:58,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:57:59,457 INFO L124 PetriNetUnfolderBase]: 3121/4787 cut-off events. [2024-06-27 20:57:59,458 INFO L125 PetriNetUnfolderBase]: For 348012/348012 co-relation queries the response was YES. [2024-06-27 20:57:59,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37775 conditions, 4787 events. 3121/4787 cut-off events. For 348012/348012 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25737 event pairs, 672 based on Foata normal form. 1/4786 useless extension candidates. Maximal degree in co-relation 37666. Up to 4736 conditions per place. [2024-06-27 20:57:59,503 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 22 changer transitions 0/314 dead transitions. [2024-06-27 20:57:59,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 314 transitions, 4552 flow [2024-06-27 20:57:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:57:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:57:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-27 20:57:59,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-27 20:57:59,504 INFO L175 Difference]: Start difference. First operand has 227 places, 299 transitions, 3880 flow. Second operand 7 states and 107 transitions. [2024-06-27 20:57:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 314 transitions, 4552 flow [2024-06-27 20:58:00,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 314 transitions, 4478 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:58:00,057 INFO L231 Difference]: Finished difference. Result has 231 places, 299 transitions, 3856 flow [2024-06-27 20:58:00,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3856, PETRI_PLACES=231, PETRI_TRANSITIONS=299} [2024-06-27 20:58:00,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-27 20:58:00,057 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 299 transitions, 3856 flow [2024-06-27 20:58:00,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:00,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:00,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:00,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:58:00,058 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:00,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:00,058 INFO L85 PathProgramCache]: Analyzing trace with hash 487143012, now seen corresponding path program 3 times [2024-06-27 20:58:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:00,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977117418] [2024-06-27 20:58:00,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:00,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:00,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:00,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:00,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977117418] [2024-06-27 20:58:00,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977117418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:00,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:00,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:00,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257379410] [2024-06-27 20:58:00,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:00,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:00,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:00,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:00,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:00,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:00,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 299 transitions, 3856 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:00,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:00,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:00,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:01,574 INFO L124 PetriNetUnfolderBase]: 3181/4870 cut-off events. [2024-06-27 20:58:01,574 INFO L125 PetriNetUnfolderBase]: For 373720/373720 co-relation queries the response was YES. [2024-06-27 20:58:01,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38839 conditions, 4870 events. 3181/4870 cut-off events. For 373720/373720 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26151 event pairs, 671 based on Foata normal form. 4/4872 useless extension candidates. Maximal degree in co-relation 38728. Up to 4587 conditions per place. [2024-06-27 20:58:01,631 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 264 selfloop transitions, 74 changer transitions 0/341 dead transitions. [2024-06-27 20:58:01,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 341 transitions, 5078 flow [2024-06-27 20:58:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:58:01,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-27 20:58:01,633 INFO L175 Difference]: Start difference. First operand has 231 places, 299 transitions, 3856 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:58:01,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 341 transitions, 5078 flow [2024-06-27 20:58:02,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 341 transitions, 5002 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:02,309 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4095 flow [2024-06-27 20:58:02,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4095, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-27 20:58:02,310 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-27 20:58:02,310 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4095 flow [2024-06-27 20:58:02,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:02,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:02,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:02,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:58:02,311 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:02,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash 487154172, now seen corresponding path program 4 times [2024-06-27 20:58:02,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:02,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987233915] [2024-06-27 20:58:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:02,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:02,863 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 20:58:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:02,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987233915] [2024-06-27 20:58:02,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987233915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:02,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:02,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:02,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956737006] [2024-06-27 20:58:02,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:02,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:02,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:02,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:02,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:02,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:02,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4095 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:02,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:02,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:02,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:03,984 INFO L124 PetriNetUnfolderBase]: 3166/4850 cut-off events. [2024-06-27 20:58:03,984 INFO L125 PetriNetUnfolderBase]: For 378868/378868 co-relation queries the response was YES. [2024-06-27 20:58:04,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38782 conditions, 4850 events. 3166/4850 cut-off events. For 378868/378868 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26074 event pairs, 668 based on Foata normal form. 5/4853 useless extension candidates. Maximal degree in co-relation 38670. Up to 4577 conditions per place. [2024-06-27 20:58:04,037 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 259 selfloop transitions, 76 changer transitions 0/338 dead transitions. [2024-06-27 20:58:04,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 338 transitions, 5022 flow [2024-06-27 20:58:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:58:04,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:58:04,038 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4095 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:58:04,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 338 transitions, 5022 flow [2024-06-27 20:58:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 338 transitions, 4821 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:04,689 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 4054 flow [2024-06-27 20:58:04,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4054, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-27 20:58:04,690 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-27 20:58:04,690 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 4054 flow [2024-06-27 20:58:04,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:04,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:04,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:58:04,691 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:04,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:04,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1677542543, now seen corresponding path program 3 times [2024-06-27 20:58:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:04,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642497106] [2024-06-27 20:58:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:04,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:05,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642497106] [2024-06-27 20:58:05,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642497106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:05,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:05,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:58:05,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456551391] [2024-06-27 20:58:05,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:05,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:58:05,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:05,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:58:05,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:58:05,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:05,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 4054 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:05,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:05,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:05,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:06,271 INFO L124 PetriNetUnfolderBase]: 3168/4855 cut-off events. [2024-06-27 20:58:06,271 INFO L125 PetriNetUnfolderBase]: For 383535/383562 co-relation queries the response was YES. [2024-06-27 20:58:06,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38784 conditions, 4855 events. 3168/4855 cut-off events. For 383535/383562 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26135 event pairs, 681 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 38671. Up to 4657 conditions per place. [2024-06-27 20:58:06,334 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 265 selfloop transitions, 65 changer transitions 0/333 dead transitions. [2024-06-27 20:58:06,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 333 transitions, 5113 flow [2024-06-27 20:58:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:58:06,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:58:06,336 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 4054 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:58:06,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 333 transitions, 5113 flow [2024-06-27 20:58:07,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 333 transitions, 4950 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:07,062 INFO L231 Difference]: Finished difference. Result has 239 places, 315 transitions, 4172 flow [2024-06-27 20:58:07,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4172, PETRI_PLACES=239, PETRI_TRANSITIONS=315} [2024-06-27 20:58:07,063 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-27 20:58:07,063 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 315 transitions, 4172 flow [2024-06-27 20:58:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:07,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:07,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:07,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:58:07,064 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:07,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:07,064 INFO L85 PathProgramCache]: Analyzing trace with hash -566295405, now seen corresponding path program 4 times [2024-06-27 20:58:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:07,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893370113] [2024-06-27 20:58:07,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:07,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:07,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:07,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893370113] [2024-06-27 20:58:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893370113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:07,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:07,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:58:07,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111162501] [2024-06-27 20:58:07,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:07,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:58:07,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:07,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:58:07,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:58:07,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:07,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 315 transitions, 4172 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:07,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:07,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:07,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:08,573 INFO L124 PetriNetUnfolderBase]: 3144/4821 cut-off events. [2024-06-27 20:58:08,573 INFO L125 PetriNetUnfolderBase]: For 390267/390267 co-relation queries the response was YES. [2024-06-27 20:58:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38446 conditions, 4821 events. 3144/4821 cut-off events. For 390267/390267 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25945 event pairs, 665 based on Foata normal form. 6/4825 useless extension candidates. Maximal degree in co-relation 38331. Up to 4720 conditions per place. [2024-06-27 20:58:08,623 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 290 selfloop transitions, 40 changer transitions 0/333 dead transitions. [2024-06-27 20:58:08,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 333 transitions, 4910 flow [2024-06-27 20:58:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:08,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:58:08,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 20:58:08,624 INFO L175 Difference]: Start difference. First operand has 239 places, 315 transitions, 4172 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:58:08,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 333 transitions, 4910 flow [2024-06-27 20:58:09,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 333 transitions, 4672 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-27 20:58:09,352 INFO L231 Difference]: Finished difference. Result has 244 places, 315 transitions, 4028 flow [2024-06-27 20:58:09,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=244, PETRI_TRANSITIONS=315} [2024-06-27 20:58:09,354 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-27 20:58:09,354 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 315 transitions, 4028 flow [2024-06-27 20:58:09,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:09,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:09,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:58:09,354 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:09,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:09,355 INFO L85 PathProgramCache]: Analyzing trace with hash 354590759, now seen corresponding path program 5 times [2024-06-27 20:58:09,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:09,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397072167] [2024-06-27 20:58:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:09,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397072167] [2024-06-27 20:58:09,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397072167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:09,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:09,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:58:09,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779238984] [2024-06-27 20:58:09,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:58:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:58:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:58:09,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:09,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 315 transitions, 4028 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:09,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:09,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:09,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:10,734 INFO L124 PetriNetUnfolderBase]: 3142/4818 cut-off events. [2024-06-27 20:58:10,735 INFO L125 PetriNetUnfolderBase]: For 392586/392586 co-relation queries the response was YES. [2024-06-27 20:58:10,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38070 conditions, 4818 events. 3142/4818 cut-off events. For 392586/392586 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25914 event pairs, 669 based on Foata normal form. 6/4822 useless extension candidates. Maximal degree in co-relation 37954. Up to 4620 conditions per place. [2024-06-27 20:58:10,787 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 281 selfloop transitions, 59 changer transitions 0/343 dead transitions. [2024-06-27 20:58:10,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 343 transitions, 4997 flow [2024-06-27 20:58:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:58:10,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:58:10,788 INFO L175 Difference]: Start difference. First operand has 244 places, 315 transitions, 4028 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:58:10,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 343 transitions, 4997 flow [2024-06-27 20:58:11,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 343 transitions, 4915 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:58:11,646 INFO L231 Difference]: Finished difference. Result has 245 places, 319 transitions, 4197 flow [2024-06-27 20:58:11,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4197, PETRI_PLACES=245, PETRI_TRANSITIONS=319} [2024-06-27 20:58:11,646 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 204 predicate places. [2024-06-27 20:58:11,647 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 319 transitions, 4197 flow [2024-06-27 20:58:11,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:11,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:11,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:58:11,647 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:11,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:11,648 INFO L85 PathProgramCache]: Analyzing trace with hash -893366769, now seen corresponding path program 6 times [2024-06-27 20:58:11,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:11,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721754351] [2024-06-27 20:58:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:11,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:11,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:12,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:12,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721754351] [2024-06-27 20:58:12,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721754351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:12,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:12,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:58:12,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176153680] [2024-06-27 20:58:12,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:12,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:58:12,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:58:12,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:58:12,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:12,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 319 transitions, 4197 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:12,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:12,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:12,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:12,950 INFO L124 PetriNetUnfolderBase]: 3127/4797 cut-off events. [2024-06-27 20:58:12,950 INFO L125 PetriNetUnfolderBase]: For 393039/393039 co-relation queries the response was YES. [2024-06-27 20:58:12,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38128 conditions, 4797 events. 3127/4797 cut-off events. For 393039/393039 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25839 event pairs, 671 based on Foata normal form. 3/4798 useless extension candidates. Maximal degree in co-relation 38010. Up to 4721 conditions per place. [2024-06-27 20:58:13,007 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 301 selfloop transitions, 33 changer transitions 0/337 dead transitions. [2024-06-27 20:58:13,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 337 transitions, 4933 flow [2024-06-27 20:58:13,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:58:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:58:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 20:58:13,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-27 20:58:13,009 INFO L175 Difference]: Start difference. First operand has 245 places, 319 transitions, 4197 flow. Second operand 6 states and 104 transitions. [2024-06-27 20:58:13,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 337 transitions, 4933 flow [2024-06-27 20:58:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 337 transitions, 4719 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:13,790 INFO L231 Difference]: Finished difference. Result has 247 places, 319 transitions, 4067 flow [2024-06-27 20:58:13,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3983, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4067, PETRI_PLACES=247, PETRI_TRANSITIONS=319} [2024-06-27 20:58:13,790 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-27 20:58:13,790 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 319 transitions, 4067 flow [2024-06-27 20:58:13,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:13,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:13,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:58:13,791 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:13,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash -688367317, now seen corresponding path program 4 times [2024-06-27 20:58:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183649862] [2024-06-27 20:58:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:14,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:14,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183649862] [2024-06-27 20:58:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183649862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:14,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:14,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:58:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793008459] [2024-06-27 20:58:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:14,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:58:14,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:58:14,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:58:14,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:14,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 319 transitions, 4067 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:14,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:14,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:14,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:15,856 INFO L124 PetriNetUnfolderBase]: 3107/4771 cut-off events. [2024-06-27 20:58:15,857 INFO L125 PetriNetUnfolderBase]: For 397929/397932 co-relation queries the response was YES. [2024-06-27 20:58:15,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37206 conditions, 4771 events. 3107/4771 cut-off events. For 397929/397932 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 25549 event pairs, 596 based on Foata normal form. 14/4772 useless extension candidates. Maximal degree in co-relation 37087. Up to 4021 conditions per place. [2024-06-27 20:58:15,910 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 273 selfloop transitions, 80 changer transitions 0/356 dead transitions. [2024-06-27 20:58:15,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 356 transitions, 4839 flow [2024-06-27 20:58:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:15,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:58:15,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 20:58:15,912 INFO L175 Difference]: Start difference. First operand has 247 places, 319 transitions, 4067 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:58:15,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 356 transitions, 4839 flow [2024-06-27 20:58:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 356 transitions, 4727 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:16,587 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 4029 flow [2024-06-27 20:58:16,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4029, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-27 20:58:16,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 20:58:16,587 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 4029 flow [2024-06-27 20:58:16,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:16,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:16,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:16,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:58:16,588 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:16,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:16,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1002843118, now seen corresponding path program 5 times [2024-06-27 20:58:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:16,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149419490] [2024-06-27 20:58:16,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:16,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:17,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:17,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149419490] [2024-06-27 20:58:17,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149419490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:17,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:17,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:17,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618899210] [2024-06-27 20:58:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:17,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:17,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:17,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:17,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:17,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:17,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 4029 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:17,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:17,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:17,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:18,046 INFO L124 PetriNetUnfolderBase]: 3127/4793 cut-off events. [2024-06-27 20:58:18,046 INFO L125 PetriNetUnfolderBase]: For 353769/353769 co-relation queries the response was YES. [2024-06-27 20:58:18,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36866 conditions, 4793 events. 3127/4793 cut-off events. For 353769/353769 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25723 event pairs, 654 based on Foata normal form. 4/4795 useless extension candidates. Maximal degree in co-relation 36748. Up to 4608 conditions per place. [2024-06-27 20:58:18,102 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 295 selfloop transitions, 55 changer transitions 0/353 dead transitions. [2024-06-27 20:58:18,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 353 transitions, 5060 flow [2024-06-27 20:58:18,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:18,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:18,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:58:18,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392857142857143 [2024-06-27 20:58:18,104 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 4029 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:58:18,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 353 transitions, 5060 flow [2024-06-27 20:58:18,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 353 transitions, 4862 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 20:58:18,663 INFO L231 Difference]: Finished difference. Result has 248 places, 322 transitions, 4021 flow [2024-06-27 20:58:18,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3831, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4021, PETRI_PLACES=248, PETRI_TRANSITIONS=322} [2024-06-27 20:58:18,663 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-27 20:58:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 322 transitions, 4021 flow [2024-06-27 20:58:18,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:18,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:18,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:58:18,664 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash 138627934, now seen corresponding path program 6 times [2024-06-27 20:58:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880193492] [2024-06-27 20:58:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:18,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:18,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:19,210 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 20:58:19,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:19,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880193492] [2024-06-27 20:58:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880193492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:19,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:19,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:19,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479629716] [2024-06-27 20:58:19,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:19,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:19,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:19,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:19,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:19,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:19,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 322 transitions, 4021 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:19,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:20,141 INFO L124 PetriNetUnfolderBase]: 3112/4773 cut-off events. [2024-06-27 20:58:20,141 INFO L125 PetriNetUnfolderBase]: For 355011/355011 co-relation queries the response was YES. [2024-06-27 20:58:20,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36239 conditions, 4773 events. 3112/4773 cut-off events. For 355011/355011 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 25590 event pairs, 647 based on Foata normal form. 5/4776 useless extension candidates. Maximal degree in co-relation 36120. Up to 4598 conditions per place. [2024-06-27 20:58:20,202 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 296 selfloop transitions, 51 changer transitions 0/350 dead transitions. [2024-06-27 20:58:20,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 350 transitions, 4849 flow [2024-06-27 20:58:20,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:58:20,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:58:20,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:58:20,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-27 20:58:20,203 INFO L175 Difference]: Start difference. First operand has 248 places, 322 transitions, 4021 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:58:20,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 350 transitions, 4849 flow [2024-06-27 20:58:20,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 350 transitions, 4608 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:20,935 INFO L231 Difference]: Finished difference. Result has 249 places, 322 transitions, 3890 flow [2024-06-27 20:58:20,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3890, PETRI_PLACES=249, PETRI_TRANSITIONS=322} [2024-06-27 20:58:20,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-27 20:58:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 322 transitions, 3890 flow [2024-06-27 20:58:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:20,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:20,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:20,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:58:20,937 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:20,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1685169039, now seen corresponding path program 1 times [2024-06-27 20:58:20,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:20,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694615000] [2024-06-27 20:58:20,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:20,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:21,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:21,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:21,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694615000] [2024-06-27 20:58:21,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694615000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:21,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531798001] [2024-06-27 20:58:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:21,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:21,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:21,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 322 transitions, 3890 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:21,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:21,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:21,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:22,658 INFO L124 PetriNetUnfolderBase]: 3130/4800 cut-off events. [2024-06-27 20:58:22,659 INFO L125 PetriNetUnfolderBase]: For 360353/360380 co-relation queries the response was YES. [2024-06-27 20:58:22,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36457 conditions, 4800 events. 3130/4800 cut-off events. For 360353/360380 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 25823 event pairs, 660 based on Foata normal form. 20/4814 useless extension candidates. Maximal degree in co-relation 36337. Up to 4567 conditions per place. [2024-06-27 20:58:22,712 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 269 selfloop transitions, 82 changer transitions 0/354 dead transitions. [2024-06-27 20:58:22,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 354 transitions, 5164 flow [2024-06-27 20:58:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:58:22,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 20:58:22,714 INFO L175 Difference]: Start difference. First operand has 249 places, 322 transitions, 3890 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:58:22,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 354 transitions, 5164 flow [2024-06-27 20:58:23,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 354 transitions, 5012 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:23,479 INFO L231 Difference]: Finished difference. Result has 252 places, 330 transitions, 4034 flow [2024-06-27 20:58:23,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3738, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4034, PETRI_PLACES=252, PETRI_TRANSITIONS=330} [2024-06-27 20:58:23,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-27 20:58:23,480 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 330 transitions, 4034 flow [2024-06-27 20:58:23,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:23,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:23,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:58:23,481 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:23,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 809122816, now seen corresponding path program 1 times [2024-06-27 20:58:23,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:23,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163332181] [2024-06-27 20:58:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:23,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:23,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:23,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163332181] [2024-06-27 20:58:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163332181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:23,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735813320] [2024-06-27 20:58:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:23,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:24,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:24,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 330 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:24,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:24,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:24,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:24,872 INFO L124 PetriNetUnfolderBase]: 3190/4883 cut-off events. [2024-06-27 20:58:24,872 INFO L125 PetriNetUnfolderBase]: For 387819/387846 co-relation queries the response was YES. [2024-06-27 20:58:24,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38298 conditions, 4883 events. 3190/4883 cut-off events. For 387819/387846 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 26263 event pairs, 652 based on Foata normal form. 22/4899 useless extension candidates. Maximal degree in co-relation 38177. Up to 4489 conditions per place. [2024-06-27 20:58:24,930 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 264 selfloop transitions, 102 changer transitions 0/369 dead transitions. [2024-06-27 20:58:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 369 transitions, 5442 flow [2024-06-27 20:58:24,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:58:24,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:58:24,940 INFO L175 Difference]: Start difference. First operand has 252 places, 330 transitions, 4034 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:58:24,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 369 transitions, 5442 flow [2024-06-27 20:58:25,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 369 transitions, 5303 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:25,852 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4547 flow [2024-06-27 20:58:25,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3895, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4547, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-27 20:58:25,852 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-27 20:58:25,852 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4547 flow [2024-06-27 20:58:25,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:25,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:25,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:25,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:58:25,853 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:25,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:25,853 INFO L85 PathProgramCache]: Analyzing trace with hash 714761474, now seen corresponding path program 2 times [2024-06-27 20:58:25,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:25,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562298347] [2024-06-27 20:58:25,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:25,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:26,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562298347] [2024-06-27 20:58:26,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562298347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:26,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:26,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428077951] [2024-06-27 20:58:26,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:26,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:26,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:26,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:26,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4547 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:27,481 INFO L124 PetriNetUnfolderBase]: 3258/4976 cut-off events. [2024-06-27 20:58:27,481 INFO L125 PetriNetUnfolderBase]: For 418492/418492 co-relation queries the response was YES. [2024-06-27 20:58:27,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41026 conditions, 4976 events. 3258/4976 cut-off events. For 418492/418492 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26775 event pairs, 643 based on Foata normal form. 4/4978 useless extension candidates. Maximal degree in co-relation 40901. Up to 4828 conditions per place. [2024-06-27 20:58:27,538 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 326 selfloop transitions, 51 changer transitions 0/380 dead transitions. [2024-06-27 20:58:27,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5962 flow [2024-06-27 20:58:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 20:58:27,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:58:27,540 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4547 flow. Second operand 9 states and 140 transitions. [2024-06-27 20:58:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5962 flow [2024-06-27 20:58:28,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 380 transitions, 5783 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-27 20:58:28,337 INFO L231 Difference]: Finished difference. Result has 266 places, 358 transitions, 4808 flow [2024-06-27 20:58:28,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4408, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4808, PETRI_PLACES=266, PETRI_TRANSITIONS=358} [2024-06-27 20:58:28,338 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-27 20:58:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 358 transitions, 4808 flow [2024-06-27 20:58:28,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:28,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:28,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:58:28,339 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:28,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1688978319, now seen corresponding path program 2 times [2024-06-27 20:58:28,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:28,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212770912] [2024-06-27 20:58:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:28,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:29,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:29,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212770912] [2024-06-27 20:58:29,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212770912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:29,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:29,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:29,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314937051] [2024-06-27 20:58:29,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:29,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:29,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:29,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:29,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 358 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:29,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:29,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:29,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:30,286 INFO L124 PetriNetUnfolderBase]: 3288/5018 cut-off events. [2024-06-27 20:58:30,286 INFO L125 PetriNetUnfolderBase]: For 427229/427229 co-relation queries the response was YES. [2024-06-27 20:58:30,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40647 conditions, 5018 events. 3288/5018 cut-off events. For 427229/427229 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26996 event pairs, 649 based on Foata normal form. 6/5022 useless extension candidates. Maximal degree in co-relation 40518. Up to 4895 conditions per place. [2024-06-27 20:58:30,358 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 49 changer transitions 0/386 dead transitions. [2024-06-27 20:58:30,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 386 transitions, 5788 flow [2024-06-27 20:58:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:58:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:58:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-27 20:58:30,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-27 20:58:30,359 INFO L175 Difference]: Start difference. First operand has 266 places, 358 transitions, 4808 flow. Second operand 9 states and 139 transitions. [2024-06-27 20:58:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 386 transitions, 5788 flow [2024-06-27 20:58:31,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 386 transitions, 5654 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:31,501 INFO L231 Difference]: Finished difference. Result has 271 places, 366 transitions, 4916 flow [2024-06-27 20:58:31,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4674, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4916, PETRI_PLACES=271, PETRI_TRANSITIONS=366} [2024-06-27 20:58:31,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-27 20:58:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 366 transitions, 4916 flow [2024-06-27 20:58:31,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:31,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:31,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:31,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:58:31,502 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:31,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 144557459, now seen corresponding path program 1 times [2024-06-27 20:58:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677116368] [2024-06-27 20:58:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:32,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677116368] [2024-06-27 20:58:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677116368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:32,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:32,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:32,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473998657] [2024-06-27 20:58:32,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:32,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:32,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:32,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:32,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 366 transitions, 4916 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:32,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:32,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:32,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:33,235 INFO L124 PetriNetUnfolderBase]: 3285/5014 cut-off events. [2024-06-27 20:58:33,235 INFO L125 PetriNetUnfolderBase]: For 425286/425286 co-relation queries the response was YES. [2024-06-27 20:58:33,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41034 conditions, 5014 events. 3285/5014 cut-off events. For 425286/425286 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27020 event pairs, 651 based on Foata normal form. 1/5013 useless extension candidates. Maximal degree in co-relation 40903. Up to 4951 conditions per place. [2024-06-27 20:58:33,293 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 349 selfloop transitions, 29 changer transitions 0/381 dead transitions. [2024-06-27 20:58:33,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 381 transitions, 5784 flow [2024-06-27 20:58:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:58:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:58:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-06-27 20:58:33,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 20:58:33,295 INFO L175 Difference]: Start difference. First operand has 271 places, 366 transitions, 4916 flow. Second operand 5 states and 85 transitions. [2024-06-27 20:58:33,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 381 transitions, 5784 flow [2024-06-27 20:58:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 381 transitions, 5622 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:34,362 INFO L231 Difference]: Finished difference. Result has 270 places, 369 transitions, 4904 flow [2024-06-27 20:58:34,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4754, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4904, PETRI_PLACES=270, PETRI_TRANSITIONS=369} [2024-06-27 20:58:34,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-27 20:58:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 369 transitions, 4904 flow [2024-06-27 20:58:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:34,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:34,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:34,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:58:34,363 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash 144347992, now seen corresponding path program 3 times [2024-06-27 20:58:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:34,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810397951] [2024-06-27 20:58:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:34,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:34,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810397951] [2024-06-27 20:58:34,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810397951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:34,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:34,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:34,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872706575] [2024-06-27 20:58:34,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:34,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:34,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:34,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:34,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 369 transitions, 4904 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:34,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:34,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:35,981 INFO L124 PetriNetUnfolderBase]: 3341/5092 cut-off events. [2024-06-27 20:58:35,981 INFO L125 PetriNetUnfolderBase]: For 452840/452840 co-relation queries the response was YES. [2024-06-27 20:58:36,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42432 conditions, 5092 events. 3341/5092 cut-off events. For 452840/452840 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 27468 event pairs, 649 based on Foata normal form. 4/5094 useless extension candidates. Maximal degree in co-relation 42300. Up to 4962 conditions per place. [2024-06-27 20:58:36,048 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 351 selfloop transitions, 42 changer transitions 0/396 dead transitions. [2024-06-27 20:58:36,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 6121 flow [2024-06-27 20:58:36,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:58:36,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:58:36,049 INFO L175 Difference]: Start difference. First operand has 270 places, 369 transitions, 4904 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:58:36,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 6121 flow [2024-06-27 20:58:37,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 396 transitions, 6045 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:58:37,115 INFO L231 Difference]: Finished difference. Result has 276 places, 377 transitions, 5161 flow [2024-06-27 20:58:37,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4828, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=276, PETRI_TRANSITIONS=377} [2024-06-27 20:58:37,115 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2024-06-27 20:58:37,115 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 377 transitions, 5161 flow [2024-06-27 20:58:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:37,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:37,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:37,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:58:37,116 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:37,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 144342257, now seen corresponding path program 3 times [2024-06-27 20:58:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:37,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809736612] [2024-06-27 20:58:37,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:37,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:37,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809736612] [2024-06-27 20:58:37,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809736612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:37,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:37,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:37,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995834026] [2024-06-27 20:58:37,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:37,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:37,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:37,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:37,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 377 transitions, 5161 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:37,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:37,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:38,975 INFO L124 PetriNetUnfolderBase]: 3363/5122 cut-off events. [2024-06-27 20:58:38,975 INFO L125 PetriNetUnfolderBase]: For 469993/469993 co-relation queries the response was YES. [2024-06-27 20:58:39,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43014 conditions, 5122 events. 3363/5122 cut-off events. For 469993/469993 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27617 event pairs, 673 based on Foata normal form. 6/5126 useless extension candidates. Maximal degree in co-relation 42880. Up to 4892 conditions per place. [2024-06-27 20:58:39,046 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 334 selfloop transitions, 75 changer transitions 0/412 dead transitions. [2024-06-27 20:58:39,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 412 transitions, 6213 flow [2024-06-27 20:58:39,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:58:39,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440625 [2024-06-27 20:58:39,047 INFO L175 Difference]: Start difference. First operand has 276 places, 377 transitions, 5161 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:58:39,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 412 transitions, 6213 flow [2024-06-27 20:58:40,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 412 transitions, 5976 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:40,162 INFO L231 Difference]: Finished difference. Result has 278 places, 384 transitions, 5221 flow [2024-06-27 20:58:40,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4924, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5221, PETRI_PLACES=278, PETRI_TRANSITIONS=384} [2024-06-27 20:58:40,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-27 20:58:40,163 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 384 transitions, 5221 flow [2024-06-27 20:58:40,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:40,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:40,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:40,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:58:40,164 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:40,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 144342412, now seen corresponding path program 4 times [2024-06-27 20:58:40,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:40,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987257368] [2024-06-27 20:58:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:40,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:40,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:40,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987257368] [2024-06-27 20:58:40,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987257368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:40,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:40,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:40,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578363694] [2024-06-27 20:58:40,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:40,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:40,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 384 transitions, 5221 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:40,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:40,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:40,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:41,777 INFO L124 PetriNetUnfolderBase]: 3415/5194 cut-off events. [2024-06-27 20:58:41,777 INFO L125 PetriNetUnfolderBase]: For 488430/488430 co-relation queries the response was YES. [2024-06-27 20:58:41,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44374 conditions, 5194 events. 3415/5194 cut-off events. For 488430/488430 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 27959 event pairs, 669 based on Foata normal form. 4/5196 useless extension candidates. Maximal degree in co-relation 44242. Up to 4903 conditions per place. [2024-06-27 20:58:41,841 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 336 selfloop transitions, 83 changer transitions 0/422 dead transitions. [2024-06-27 20:58:41,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 422 transitions, 6736 flow [2024-06-27 20:58:41,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:41,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:58:41,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 20:58:41,843 INFO L175 Difference]: Start difference. First operand has 278 places, 384 transitions, 5221 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:58:41,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 422 transitions, 6736 flow [2024-06-27 20:58:43,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 422 transitions, 6537 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:43,052 INFO L231 Difference]: Finished difference. Result has 283 places, 395 transitions, 5565 flow [2024-06-27 20:58:43,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5022, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5565, PETRI_PLACES=283, PETRI_TRANSITIONS=395} [2024-06-27 20:58:43,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-27 20:58:43,053 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 395 transitions, 5565 flow [2024-06-27 20:58:43,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:43,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:43,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:58:43,053 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:43,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 848374749, now seen corresponding path program 1 times [2024-06-27 20:58:43,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:43,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825081646] [2024-06-27 20:58:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:43,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:43,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:43,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825081646] [2024-06-27 20:58:43,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825081646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:43,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:43,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:43,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013718015] [2024-06-27 20:58:43,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:43,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:43,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:43,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:43,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 395 transitions, 5565 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:43,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:43,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:43,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:45,120 INFO L124 PetriNetUnfolderBase]: 3423/5206 cut-off events. [2024-06-27 20:58:45,120 INFO L125 PetriNetUnfolderBase]: For 496682/496682 co-relation queries the response was YES. [2024-06-27 20:58:45,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44892 conditions, 5206 events. 3423/5206 cut-off events. For 496682/496682 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27887 event pairs, 564 based on Foata normal form. 2/5206 useless extension candidates. Maximal degree in co-relation 44757. Up to 5019 conditions per place. [2024-06-27 20:58:45,180 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 382 selfloop transitions, 44 changer transitions 0/429 dead transitions. [2024-06-27 20:58:45,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 429 transitions, 6730 flow [2024-06-27 20:58:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:45,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:58:45,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:58:45,182 INFO L175 Difference]: Start difference. First operand has 283 places, 395 transitions, 5565 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:58:45,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 429 transitions, 6730 flow [2024-06-27 20:58:46,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 429 transitions, 6584 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-27 20:58:46,490 INFO L231 Difference]: Finished difference. Result has 289 places, 399 transitions, 5580 flow [2024-06-27 20:58:46,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5419, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5580, PETRI_PLACES=289, PETRI_TRANSITIONS=399} [2024-06-27 20:58:46,491 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-27 20:58:46,491 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 399 transitions, 5580 flow [2024-06-27 20:58:46,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:46,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:46,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:46,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:58:46,491 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:46,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -669314639, now seen corresponding path program 2 times [2024-06-27 20:58:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:46,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780369832] [2024-06-27 20:58:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:47,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:47,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780369832] [2024-06-27 20:58:47,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780369832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:47,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:47,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:58:47,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498559294] [2024-06-27 20:58:47,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:47,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:58:47,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:47,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:58:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:58:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:47,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 399 transitions, 5580 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:47,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:47,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:48,525 INFO L124 PetriNetUnfolderBase]: 3431/5218 cut-off events. [2024-06-27 20:58:48,526 INFO L125 PetriNetUnfolderBase]: For 508110/508110 co-relation queries the response was YES. [2024-06-27 20:58:48,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45069 conditions, 5218 events. 3431/5218 cut-off events. For 508110/508110 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28115 event pairs, 676 based on Foata normal form. 2/5218 useless extension candidates. Maximal degree in co-relation 44932. Up to 5082 conditions per place. [2024-06-27 20:58:48,585 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 380 selfloop transitions, 44 changer transitions 0/427 dead transitions. [2024-06-27 20:58:48,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 427 transitions, 6562 flow [2024-06-27 20:58:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:58:48,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 20:58:48,596 INFO L175 Difference]: Start difference. First operand has 289 places, 399 transitions, 5580 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:58:48,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 427 transitions, 6562 flow [2024-06-27 20:58:49,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 427 transitions, 6457 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 20:58:49,669 INFO L231 Difference]: Finished difference. Result has 293 places, 401 transitions, 5609 flow [2024-06-27 20:58:49,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5609, PETRI_PLACES=293, PETRI_TRANSITIONS=401} [2024-06-27 20:58:49,670 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 252 predicate places. [2024-06-27 20:58:49,670 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 401 transitions, 5609 flow [2024-06-27 20:58:49,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:49,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:49,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:49,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:58:49,671 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:49,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:49,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1149879245, now seen corresponding path program 1 times [2024-06-27 20:58:49,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:49,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087901133] [2024-06-27 20:58:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:49,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:50,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:50,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087901133] [2024-06-27 20:58:50,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087901133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:50,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:50,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:50,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492471389] [2024-06-27 20:58:50,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:50,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:50,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:50,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:50,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:50,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:50,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 401 transitions, 5609 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:50,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:50,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:50,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:51,549 INFO L124 PetriNetUnfolderBase]: 3457/5255 cut-off events. [2024-06-27 20:58:51,549 INFO L125 PetriNetUnfolderBase]: For 526460/526460 co-relation queries the response was YES. [2024-06-27 20:58:51,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45667 conditions, 5255 events. 3457/5255 cut-off events. For 526460/526460 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 28362 event pairs, 653 based on Foata normal form. 2/5255 useless extension candidates. Maximal degree in co-relation 45528. Up to 5080 conditions per place. [2024-06-27 20:58:51,648 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 383 selfloop transitions, 56 changer transitions 0/442 dead transitions. [2024-06-27 20:58:51,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 442 transitions, 6907 flow [2024-06-27 20:58:51,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:51,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:58:51,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:58:51,650 INFO L175 Difference]: Start difference. First operand has 293 places, 401 transitions, 5609 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:58:51,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 442 transitions, 6907 flow [2024-06-27 20:58:53,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 442 transitions, 6801 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:58:53,572 INFO L231 Difference]: Finished difference. Result has 296 places, 414 transitions, 5821 flow [2024-06-27 20:58:53,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5821, PETRI_PLACES=296, PETRI_TRANSITIONS=414} [2024-06-27 20:58:53,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-27 20:58:53,573 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 414 transitions, 5821 flow [2024-06-27 20:58:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:53,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:58:53,574 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:53,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash 848674395, now seen corresponding path program 2 times [2024-06-27 20:58:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990440131] [2024-06-27 20:58:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990440131] [2024-06-27 20:58:54,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990440131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:54,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:54,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:54,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327330159] [2024-06-27 20:58:54,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:54,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:54,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:54,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 414 transitions, 5821 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:54,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:54,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:55,177 INFO L124 PetriNetUnfolderBase]: 3467/5269 cut-off events. [2024-06-27 20:58:55,177 INFO L125 PetriNetUnfolderBase]: For 542978/542978 co-relation queries the response was YES. [2024-06-27 20:58:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46654 conditions, 5269 events. 3467/5269 cut-off events. For 542978/542978 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28416 event pairs, 674 based on Foata normal form. 2/5269 useless extension candidates. Maximal degree in co-relation 46513. Up to 5132 conditions per place. [2024-06-27 20:58:55,247 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 385 selfloop transitions, 53 changer transitions 0/441 dead transitions. [2024-06-27 20:58:55,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 441 transitions, 6847 flow [2024-06-27 20:58:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:58:55,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39375 [2024-06-27 20:58:55,248 INFO L175 Difference]: Start difference. First operand has 296 places, 414 transitions, 5821 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:58:55,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 441 transitions, 6847 flow [2024-06-27 20:58:56,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 441 transitions, 6763 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-27 20:58:56,373 INFO L231 Difference]: Finished difference. Result has 303 places, 418 transitions, 5924 flow [2024-06-27 20:58:56,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5924, PETRI_PLACES=303, PETRI_TRANSITIONS=418} [2024-06-27 20:58:56,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-27 20:58:56,374 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 418 transitions, 5924 flow [2024-06-27 20:58:56,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:56,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:56,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:56,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:58:56,375 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:56,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:56,375 INFO L85 PathProgramCache]: Analyzing trace with hash 2039214353, now seen corresponding path program 3 times [2024-06-27 20:58:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:56,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821463880] [2024-06-27 20:58:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:58:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:58:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:58:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821463880] [2024-06-27 20:58:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821463880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:58:56,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:58:56,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:58:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921802368] [2024-06-27 20:58:56,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:58:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:58:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:58:56,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:58:56,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:58:56,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:58:56,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 418 transitions, 5924 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:56,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:58:56,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:58:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:58:57,911 INFO L124 PetriNetUnfolderBase]: 3501/5315 cut-off events. [2024-06-27 20:58:57,912 INFO L125 PetriNetUnfolderBase]: For 565294/565294 co-relation queries the response was YES. [2024-06-27 20:58:57,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47222 conditions, 5315 events. 3501/5315 cut-off events. For 565294/565294 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28733 event pairs, 641 based on Foata normal form. 2/5315 useless extension candidates. Maximal degree in co-relation 47078. Up to 5038 conditions per place. [2024-06-27 20:58:57,984 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 375 selfloop transitions, 77 changer transitions 0/455 dead transitions. [2024-06-27 20:58:57,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 455 transitions, 7400 flow [2024-06-27 20:58:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:58:57,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:58:57,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:58:57,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-27 20:58:57,986 INFO L175 Difference]: Start difference. First operand has 303 places, 418 transitions, 5924 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:58:57,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 455 transitions, 7400 flow [2024-06-27 20:58:59,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 455 transitions, 7271 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:58:59,544 INFO L231 Difference]: Finished difference. Result has 306 places, 427 transitions, 6129 flow [2024-06-27 20:58:59,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5795, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6129, PETRI_PLACES=306, PETRI_TRANSITIONS=427} [2024-06-27 20:58:59,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-27 20:58:59,544 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 427 transitions, 6129 flow [2024-06-27 20:58:59,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:58:59,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:58:59,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:58:59,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:58:59,545 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:58:59,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:58:59,545 INFO L85 PathProgramCache]: Analyzing trace with hash -551103641, now seen corresponding path program 1 times [2024-06-27 20:58:59,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:58:59,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275776580] [2024-06-27 20:58:59,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:58:59,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:58:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:00,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:00,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275776580] [2024-06-27 20:59:00,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275776580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:00,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:00,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:00,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681788620] [2024-06-27 20:59:00,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:00,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:00,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:00,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:00,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 427 transitions, 6129 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:00,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:00,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:00,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:01,220 INFO L124 PetriNetUnfolderBase]: 3543/5373 cut-off events. [2024-06-27 20:59:01,221 INFO L125 PetriNetUnfolderBase]: For 597452/597452 co-relation queries the response was YES. [2024-06-27 20:59:01,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48841 conditions, 5373 events. 3543/5373 cut-off events. For 597452/597452 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29073 event pairs, 685 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 48696. Up to 5250 conditions per place. [2024-06-27 20:59:01,291 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 404 selfloop transitions, 51 changer transitions 0/458 dead transitions. [2024-06-27 20:59:01,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 458 transitions, 7539 flow [2024-06-27 20:59:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:59:01,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-27 20:59:01,293 INFO L175 Difference]: Start difference. First operand has 306 places, 427 transitions, 6129 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:59:01,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 458 transitions, 7539 flow [2024-06-27 20:59:03,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 458 transitions, 7403 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:03,112 INFO L231 Difference]: Finished difference. Result has 311 places, 436 transitions, 6401 flow [2024-06-27 20:59:03,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6401, PETRI_PLACES=311, PETRI_TRANSITIONS=436} [2024-06-27 20:59:03,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-27 20:59:03,113 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 436 transitions, 6401 flow [2024-06-27 20:59:03,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:03,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:03,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:03,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:59:03,114 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:03,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -551103827, now seen corresponding path program 1 times [2024-06-27 20:59:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:03,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708184551] [2024-06-27 20:59:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:03,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:03,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:03,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:03,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708184551] [2024-06-27 20:59:03,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708184551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:03,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:03,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:03,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848883544] [2024-06-27 20:59:03,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:03,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:03,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:03,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:03,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 436 transitions, 6401 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:03,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:03,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:03,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:04,831 INFO L124 PetriNetUnfolderBase]: 3548/5380 cut-off events. [2024-06-27 20:59:04,832 INFO L125 PetriNetUnfolderBase]: For 606837/606837 co-relation queries the response was YES. [2024-06-27 20:59:04,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48915 conditions, 5380 events. 3548/5380 cut-off events. For 606837/606837 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29103 event pairs, 684 based on Foata normal form. 1/5379 useless extension candidates. Maximal degree in co-relation 48768. Up to 5300 conditions per place. [2024-06-27 20:59:04,897 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 420 selfloop transitions, 35 changer transitions 0/458 dead transitions. [2024-06-27 20:59:04,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 458 transitions, 7445 flow [2024-06-27 20:59:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-27 20:59:04,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.378125 [2024-06-27 20:59:04,898 INFO L175 Difference]: Start difference. First operand has 311 places, 436 transitions, 6401 flow. Second operand 8 states and 121 transitions. [2024-06-27 20:59:04,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 458 transitions, 7445 flow [2024-06-27 20:59:06,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 458 transitions, 7300 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:06,585 INFO L231 Difference]: Finished difference. Result has 315 places, 439 transitions, 6408 flow [2024-06-27 20:59:06,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6256, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6408, PETRI_PLACES=315, PETRI_TRANSITIONS=439} [2024-06-27 20:59:06,586 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 274 predicate places. [2024-06-27 20:59:06,586 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 439 transitions, 6408 flow [2024-06-27 20:59:06,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:06,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:06,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:06,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:59:06,587 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:06,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:06,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2039512883, now seen corresponding path program 4 times [2024-06-27 20:59:06,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:06,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813153639] [2024-06-27 20:59:06,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:06,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:07,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:07,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813153639] [2024-06-27 20:59:07,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813153639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:07,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:07,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975946618] [2024-06-27 20:59:07,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:07,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:07,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:07,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:07,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:07,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 439 transitions, 6408 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:07,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:07,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:07,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:08,288 INFO L124 PetriNetUnfolderBase]: 3566/5405 cut-off events. [2024-06-27 20:59:08,289 INFO L125 PetriNetUnfolderBase]: For 625704/625704 co-relation queries the response was YES. [2024-06-27 20:59:08,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49264 conditions, 5405 events. 3566/5405 cut-off events. For 625704/625704 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29260 event pairs, 635 based on Foata normal form. 2/5405 useless extension candidates. Maximal degree in co-relation 49116. Up to 5122 conditions per place. [2024-06-27 20:59:08,350 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 384 selfloop transitions, 83 changer transitions 0/470 dead transitions. [2024-06-27 20:59:08,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 470 transitions, 7838 flow [2024-06-27 20:59:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:08,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:59:08,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2024-06-27 20:59:08,352 INFO L175 Difference]: Start difference. First operand has 315 places, 439 transitions, 6408 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:59:08,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 470 transitions, 7838 flow [2024-06-27 20:59:10,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 470 transitions, 7730 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:10,007 INFO L231 Difference]: Finished difference. Result has 317 places, 445 transitions, 6564 flow [2024-06-27 20:59:10,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6300, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6564, PETRI_PLACES=317, PETRI_TRANSITIONS=445} [2024-06-27 20:59:10,008 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 276 predicate places. [2024-06-27 20:59:10,008 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 445 transitions, 6564 flow [2024-06-27 20:59:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:10,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:10,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:10,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:59:10,009 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:10,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:10,009 INFO L85 PathProgramCache]: Analyzing trace with hash -373734971, now seen corresponding path program 2 times [2024-06-27 20:59:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:10,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577597348] [2024-06-27 20:59:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:10,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:10,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:10,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577597348] [2024-06-27 20:59:10,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577597348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:10,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:10,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:10,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493332949] [2024-06-27 20:59:10,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:10,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:10,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:10,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:10,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:10,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:10,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 445 transitions, 6564 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:10,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:10,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:10,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:11,585 INFO L124 PetriNetUnfolderBase]: 3576/5419 cut-off events. [2024-06-27 20:59:11,585 INFO L125 PetriNetUnfolderBase]: For 642723/642723 co-relation queries the response was YES. [2024-06-27 20:59:11,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49772 conditions, 5419 events. 3576/5419 cut-off events. For 642723/642723 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29349 event pairs, 685 based on Foata normal form. 2/5419 useless extension candidates. Maximal degree in co-relation 49623. Up to 5353 conditions per place. [2024-06-27 20:59:11,656 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 430 selfloop transitions, 32 changer transitions 0/465 dead transitions. [2024-06-27 20:59:11,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 465 transitions, 7628 flow [2024-06-27 20:59:11,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:59:11,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:59:11,657 INFO L175 Difference]: Start difference. First operand has 317 places, 445 transitions, 6564 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:59:11,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 465 transitions, 7628 flow [2024-06-27 20:59:13,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 465 transitions, 7494 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:13,494 INFO L231 Difference]: Finished difference. Result has 321 places, 448 transitions, 6584 flow [2024-06-27 20:59:13,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6430, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6584, PETRI_PLACES=321, PETRI_TRANSITIONS=448} [2024-06-27 20:59:13,495 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 280 predicate places. [2024-06-27 20:59:13,495 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 448 transitions, 6584 flow [2024-06-27 20:59:13,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:13,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:13,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:13,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:59:13,495 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:13,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:13,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681881, now seen corresponding path program 2 times [2024-06-27 20:59:13,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:13,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940074821] [2024-06-27 20:59:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:13,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:13,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:13,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940074821] [2024-06-27 20:59:13,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940074821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:13,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:13,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048783771] [2024-06-27 20:59:13,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:13,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:13,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:13,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:13,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 448 transitions, 6584 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:13,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:13,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:13,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:15,140 INFO L124 PetriNetUnfolderBase]: 3581/5426 cut-off events. [2024-06-27 20:59:15,141 INFO L125 PetriNetUnfolderBase]: For 654609/654609 co-relation queries the response was YES. [2024-06-27 20:59:15,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49896 conditions, 5426 events. 3581/5426 cut-off events. For 654609/654609 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29343 event pairs, 684 based on Foata normal form. 1/5425 useless extension candidates. Maximal degree in co-relation 49746. Up to 5372 conditions per place. [2024-06-27 20:59:15,215 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 439 selfloop transitions, 25 changer transitions 0/467 dead transitions. [2024-06-27 20:59:15,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 467 transitions, 7640 flow [2024-06-27 20:59:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:15,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-27 20:59:15,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2024-06-27 20:59:15,217 INFO L175 Difference]: Start difference. First operand has 321 places, 448 transitions, 6584 flow. Second operand 8 states and 117 transitions. [2024-06-27 20:59:15,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 467 transitions, 7640 flow [2024-06-27 20:59:16,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 467 transitions, 7487 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-27 20:59:16,981 INFO L231 Difference]: Finished difference. Result has 322 places, 451 transitions, 6569 flow [2024-06-27 20:59:16,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6431, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6569, PETRI_PLACES=322, PETRI_TRANSITIONS=451} [2024-06-27 20:59:16,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-27 20:59:16,981 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 451 transitions, 6569 flow [2024-06-27 20:59:16,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:16,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:16,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:16,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:59:16,982 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:16,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:16,982 INFO L85 PathProgramCache]: Analyzing trace with hash -374092463, now seen corresponding path program 5 times [2024-06-27 20:59:16,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:16,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429388285] [2024-06-27 20:59:16,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:16,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:17,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:17,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429388285] [2024-06-27 20:59:17,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429388285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:17,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:17,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:17,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105753146] [2024-06-27 20:59:17,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:17,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:17,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:17,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:17,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:17,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:17,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 451 transitions, 6569 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:17,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:17,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:17,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:18,571 INFO L124 PetriNetUnfolderBase]: 3591/5440 cut-off events. [2024-06-27 20:59:18,572 INFO L125 PetriNetUnfolderBase]: For 672318/672318 co-relation queries the response was YES. [2024-06-27 20:59:18,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50038 conditions, 5440 events. 3591/5440 cut-off events. For 672318/672318 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 29426 event pairs, 678 based on Foata normal form. 2/5440 useless extension candidates. Maximal degree in co-relation 49888. Up to 5306 conditions per place. [2024-06-27 20:59:18,647 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 420 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-27 20:59:18,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 473 transitions, 7638 flow [2024-06-27 20:59:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:59:18,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:59:18,649 INFO L175 Difference]: Start difference. First operand has 322 places, 451 transitions, 6569 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:59:18,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 473 transitions, 7638 flow [2024-06-27 20:59:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 473 transitions, 7544 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:20,699 INFO L231 Difference]: Finished difference. Result has 325 places, 455 transitions, 6658 flow [2024-06-27 20:59:20,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6475, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6658, PETRI_PLACES=325, PETRI_TRANSITIONS=455} [2024-06-27 20:59:20,700 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-27 20:59:20,700 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 455 transitions, 6658 flow [2024-06-27 20:59:20,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:20,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:20,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:20,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:59:20,701 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:20,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1135681695, now seen corresponding path program 6 times [2024-06-27 20:59:20,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:20,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132156794] [2024-06-27 20:59:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:20,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:21,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:21,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:21,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132156794] [2024-06-27 20:59:21,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132156794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:21,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:21,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:21,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135280112] [2024-06-27 20:59:21,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:21,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:21,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:21,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:21,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:21,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:21,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 455 transitions, 6658 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:21,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:21,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:21,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:22,368 INFO L124 PetriNetUnfolderBase]: 3609/5465 cut-off events. [2024-06-27 20:59:22,369 INFO L125 PetriNetUnfolderBase]: For 691610/691610 co-relation queries the response was YES. [2024-06-27 20:59:22,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50545 conditions, 5465 events. 3609/5465 cut-off events. For 691610/691610 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29565 event pairs, 678 based on Foata normal form. 2/5465 useless extension candidates. Maximal degree in co-relation 50393. Up to 5306 conditions per place. [2024-06-27 20:59:22,446 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 418 selfloop transitions, 60 changer transitions 0/481 dead transitions. [2024-06-27 20:59:22,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 481 transitions, 7948 flow [2024-06-27 20:59:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:59:22,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-06-27 20:59:22,447 INFO L175 Difference]: Start difference. First operand has 325 places, 455 transitions, 6658 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:59:22,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 481 transitions, 7948 flow [2024-06-27 20:59:24,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 481 transitions, 7843 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:24,467 INFO L231 Difference]: Finished difference. Result has 330 places, 461 transitions, 6808 flow [2024-06-27 20:59:24,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6808, PETRI_PLACES=330, PETRI_TRANSITIONS=461} [2024-06-27 20:59:24,467 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 289 predicate places. [2024-06-27 20:59:24,467 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 461 transitions, 6808 flow [2024-06-27 20:59:24,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:24,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:24,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:24,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:59:24,468 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -373972121, now seen corresponding path program 3 times [2024-06-27 20:59:24,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:24,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793868081] [2024-06-27 20:59:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:24,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793868081] [2024-06-27 20:59:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793868081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:24,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:24,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673405584] [2024-06-27 20:59:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:24,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:24,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 461 transitions, 6808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:24,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:24,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:24,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:26,261 INFO L124 PetriNetUnfolderBase]: 3603/5457 cut-off events. [2024-06-27 20:59:26,261 INFO L125 PetriNetUnfolderBase]: For 700405/700405 co-relation queries the response was YES. [2024-06-27 20:59:26,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50540 conditions, 5457 events. 3603/5457 cut-off events. For 700405/700405 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 29481 event pairs, 684 based on Foata normal form. 2/5457 useless extension candidates. Maximal degree in co-relation 50386. Up to 5382 conditions per place. [2024-06-27 20:59:26,336 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 439 selfloop transitions, 37 changer transitions 0/479 dead transitions. [2024-06-27 20:59:26,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 479 transitions, 7832 flow [2024-06-27 20:59:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:59:26,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:59:26,337 INFO L175 Difference]: Start difference. First operand has 330 places, 461 transitions, 6808 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:59:26,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 479 transitions, 7832 flow [2024-06-27 20:59:28,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 479 transitions, 7701 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 20:59:28,428 INFO L231 Difference]: Finished difference. Result has 333 places, 461 transitions, 6757 flow [2024-06-27 20:59:28,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6757, PETRI_PLACES=333, PETRI_TRANSITIONS=461} [2024-06-27 20:59:28,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 292 predicate places. [2024-06-27 20:59:28,429 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 461 transitions, 6757 flow [2024-06-27 20:59:28,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:28,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:28,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:59:28,430 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:28,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2078445839, now seen corresponding path program 3 times [2024-06-27 20:59:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:28,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996624071] [2024-06-27 20:59:28,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:28,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:29,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:29,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996624071] [2024-06-27 20:59:29,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996624071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:29,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:29,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:29,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305906875] [2024-06-27 20:59:29,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:29,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:29,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:29,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:29,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:29,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:29,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 461 transitions, 6757 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:29,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:29,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:29,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:30,810 INFO L124 PetriNetUnfolderBase]: 3611/5469 cut-off events. [2024-06-27 20:59:30,811 INFO L125 PetriNetUnfolderBase]: For 715603/715603 co-relation queries the response was YES. [2024-06-27 20:59:30,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50701 conditions, 5469 events. 3611/5469 cut-off events. For 715603/715603 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29572 event pairs, 677 based on Foata normal form. 2/5469 useless extension candidates. Maximal degree in co-relation 50546. Up to 5335 conditions per place. [2024-06-27 20:59:30,885 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 430 selfloop transitions, 48 changer transitions 0/481 dead transitions. [2024-06-27 20:59:30,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 481 transitions, 7797 flow [2024-06-27 20:59:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:59:30,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:59:30,886 INFO L175 Difference]: Start difference. First operand has 333 places, 461 transitions, 6757 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:59:30,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 481 transitions, 7797 flow [2024-06-27 20:59:33,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 481 transitions, 7667 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:33,694 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 6756 flow [2024-06-27 20:59:33,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6627, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6756, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-27 20:59:33,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 294 predicate places. [2024-06-27 20:59:33,697 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 6756 flow [2024-06-27 20:59:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:33,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:33,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:33,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:59:33,697 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:33,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:33,698 INFO L85 PathProgramCache]: Analyzing trace with hash -2078076443, now seen corresponding path program 1 times [2024-06-27 20:59:33,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:33,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422831797] [2024-06-27 20:59:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:33,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:34,382 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 20:59:34,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:34,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422831797] [2024-06-27 20:59:34,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422831797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:34,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:34,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:59:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933789701] [2024-06-27 20:59:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:34,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:59:34,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:34,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:59:34,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:59:34,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:34,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 6756 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:34,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:34,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:34,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:35,739 INFO L124 PetriNetUnfolderBase]: 3619/5481 cut-off events. [2024-06-27 20:59:35,739 INFO L125 PetriNetUnfolderBase]: For 731764/731764 co-relation queries the response was YES. [2024-06-27 20:59:35,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50962 conditions, 5481 events. 3619/5481 cut-off events. For 731764/731764 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 29665 event pairs, 685 based on Foata normal form. 2/5481 useless extension candidates. Maximal degree in co-relation 50806. Up to 5401 conditions per place. [2024-06-27 20:59:35,823 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 440 selfloop transitions, 39 changer transitions 0/482 dead transitions. [2024-06-27 20:59:35,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 482 transitions, 7822 flow [2024-06-27 20:59:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 20:59:35,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 20:59:35,825 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 6756 flow. Second operand 8 states and 122 transitions. [2024-06-27 20:59:35,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 482 transitions, 7822 flow [2024-06-27 20:59:38,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 482 transitions, 7713 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:38,213 INFO L231 Difference]: Finished difference. Result has 337 places, 465 transitions, 6788 flow [2024-06-27 20:59:38,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6788, PETRI_PLACES=337, PETRI_TRANSITIONS=465} [2024-06-27 20:59:38,214 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-27 20:59:38,214 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 465 transitions, 6788 flow [2024-06-27 20:59:38,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:38,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:38,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:59:38,215 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:38,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:38,215 INFO L85 PathProgramCache]: Analyzing trace with hash 463913233, now seen corresponding path program 7 times [2024-06-27 20:59:38,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:38,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297228932] [2024-06-27 20:59:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:38,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:38,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297228932] [2024-06-27 20:59:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297228932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:38,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:38,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:38,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965822191] [2024-06-27 20:59:38,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:38,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:38,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:38,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:38,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 465 transitions, 6788 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:38,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:38,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:38,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:39,991 INFO L124 PetriNetUnfolderBase]: 3697/5595 cut-off events. [2024-06-27 20:59:39,991 INFO L125 PetriNetUnfolderBase]: For 789417/789420 co-relation queries the response was YES. [2024-06-27 20:59:40,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52534 conditions, 5595 events. 3697/5595 cut-off events. For 789417/789420 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30394 event pairs, 631 based on Foata normal form. 8/5590 useless extension candidates. Maximal degree in co-relation 52377. Up to 4621 conditions per place. [2024-06-27 20:59:40,073 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 357 selfloop transitions, 150 changer transitions 0/510 dead transitions. [2024-06-27 20:59:40,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 510 transitions, 8758 flow [2024-06-27 20:59:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:40,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:59:40,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-27 20:59:40,096 INFO L175 Difference]: Start difference. First operand has 337 places, 465 transitions, 6788 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:59:40,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 510 transitions, 8758 flow [2024-06-27 20:59:42,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 510 transitions, 8633 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:42,644 INFO L231 Difference]: Finished difference. Result has 341 places, 482 transitions, 7355 flow [2024-06-27 20:59:42,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7355, PETRI_PLACES=341, PETRI_TRANSITIONS=482} [2024-06-27 20:59:42,645 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 300 predicate places. [2024-06-27 20:59:42,645 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 482 transitions, 7355 flow [2024-06-27 20:59:42,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:42,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:42,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:42,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:59:42,646 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:42,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash 464211949, now seen corresponding path program 3 times [2024-06-27 20:59:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:42,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122132856] [2024-06-27 20:59:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:42,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:43,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:43,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122132856] [2024-06-27 20:59:43,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122132856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:43,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:43,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:43,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351389915] [2024-06-27 20:59:43,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:43,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:43,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:43,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:43,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 482 transitions, 7355 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:43,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:43,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:43,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:44,521 INFO L124 PetriNetUnfolderBase]: 3694/5587 cut-off events. [2024-06-27 20:59:44,521 INFO L125 PetriNetUnfolderBase]: For 788804/788831 co-relation queries the response was YES. [2024-06-27 20:59:44,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53965 conditions, 5587 events. 3694/5587 cut-off events. For 788804/788831 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 30303 event pairs, 702 based on Foata normal form. 19/5600 useless extension candidates. Maximal degree in co-relation 53805. Up to 5396 conditions per place. [2024-06-27 20:59:44,591 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 426 selfloop transitions, 71 changer transitions 0/500 dead transitions. [2024-06-27 20:59:44,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 500 transitions, 8583 flow [2024-06-27 20:59:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:59:44,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-27 20:59:44,593 INFO L175 Difference]: Start difference. First operand has 341 places, 482 transitions, 7355 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:59:44,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 500 transitions, 8583 flow [2024-06-27 20:59:46,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 500 transitions, 8363 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-06-27 20:59:46,911 INFO L231 Difference]: Finished difference. Result has 347 places, 482 transitions, 7283 flow [2024-06-27 20:59:46,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7283, PETRI_PLACES=347, PETRI_TRANSITIONS=482} [2024-06-27 20:59:46,912 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 306 predicate places. [2024-06-27 20:59:46,912 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 482 transitions, 7283 flow [2024-06-27 20:59:46,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:46,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:46,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:46,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:59:46,913 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:46,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:46,913 INFO L85 PathProgramCache]: Analyzing trace with hash 464212135, now seen corresponding path program 4 times [2024-06-27 20:59:46,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:46,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473965578] [2024-06-27 20:59:46,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:46,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:47,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:47,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473965578] [2024-06-27 20:59:47,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473965578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:47,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:47,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12426925] [2024-06-27 20:59:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:47,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:47,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:47,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:47,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 482 transitions, 7283 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:47,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:47,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:47,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:48,752 INFO L124 PetriNetUnfolderBase]: 3698/5593 cut-off events. [2024-06-27 20:59:48,752 INFO L125 PetriNetUnfolderBase]: For 806560/806587 co-relation queries the response was YES. [2024-06-27 20:59:48,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53472 conditions, 5593 events. 3698/5593 cut-off events. For 806560/806587 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 30354 event pairs, 674 based on Foata normal form. 22/5609 useless extension candidates. Maximal degree in co-relation 53310. Up to 5061 conditions per place. [2024-06-27 20:59:48,824 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 141 changer transitions 0/507 dead transitions. [2024-06-27 20:59:48,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 507 transitions, 8830 flow [2024-06-27 20:59:48,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:48,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:48,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:59:48,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 20:59:48,826 INFO L175 Difference]: Start difference. First operand has 347 places, 482 transitions, 7283 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:59:48,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 507 transitions, 8830 flow [2024-06-27 20:59:50,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 507 transitions, 8658 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:59:51,000 INFO L231 Difference]: Finished difference. Result has 349 places, 485 transitions, 7495 flow [2024-06-27 20:59:51,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7495, PETRI_PLACES=349, PETRI_TRANSITIONS=485} [2024-06-27 20:59:51,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-27 20:59:51,001 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 485 transitions, 7495 flow [2024-06-27 20:59:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:51,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:51,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:51,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:59:51,001 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:51,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:51,002 INFO L85 PathProgramCache]: Analyzing trace with hash 328255835, now seen corresponding path program 8 times [2024-06-27 20:59:51,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:51,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142629462] [2024-06-27 20:59:51,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:51,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:51,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:51,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142629462] [2024-06-27 20:59:51,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142629462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:51,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:51,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:51,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492609429] [2024-06-27 20:59:51,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:51,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:51,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:51,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:51,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:51,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 485 transitions, 7495 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:51,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:51,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:51,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:52,939 INFO L124 PetriNetUnfolderBase]: 3756/5678 cut-off events. [2024-06-27 20:59:52,939 INFO L125 PetriNetUnfolderBase]: For 844152/844155 co-relation queries the response was YES. [2024-06-27 20:59:52,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54824 conditions, 5678 events. 3756/5678 cut-off events. For 844152/844155 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30849 event pairs, 656 based on Foata normal form. 8/5673 useless extension candidates. Maximal degree in co-relation 54661. Up to 4674 conditions per place. [2024-06-27 20:59:53,010 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 363 selfloop transitions, 153 changer transitions 0/519 dead transitions. [2024-06-27 20:59:53,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 519 transitions, 9326 flow [2024-06-27 20:59:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:59:53,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:59:53,012 INFO L175 Difference]: Start difference. First operand has 349 places, 485 transitions, 7495 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:59:53,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 519 transitions, 9326 flow [2024-06-27 20:59:55,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 519 transitions, 8814 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-27 20:59:55,501 INFO L231 Difference]: Finished difference. Result has 350 places, 494 transitions, 7465 flow [2024-06-27 20:59:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7465, PETRI_PLACES=350, PETRI_TRANSITIONS=494} [2024-06-27 20:59:55,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-27 20:59:55,501 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 494 transitions, 7465 flow [2024-06-27 20:59:55,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:55,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:55,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:55,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:59:55,502 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:55,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:55,502 INFO L85 PathProgramCache]: Analyzing trace with hash 556365491, now seen corresponding path program 4 times [2024-06-27 20:59:55,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:55,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632369784] [2024-06-27 20:59:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:55,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:59:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:59:56,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:59:56,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632369784] [2024-06-27 20:59:56,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632369784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:59:56,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:59:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:59:56,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679391809] [2024-06-27 20:59:56,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:59:56,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:59:56,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:59:56,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:59:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:59:56,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 20:59:56,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 494 transitions, 7465 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:56,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:59:56,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 20:59:56,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:59:57,476 INFO L124 PetriNetUnfolderBase]: 3753/5670 cut-off events. [2024-06-27 20:59:57,476 INFO L125 PetriNetUnfolderBase]: For 833900/833927 co-relation queries the response was YES. [2024-06-27 20:59:57,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54528 conditions, 5670 events. 3753/5670 cut-off events. For 833900/833927 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 30821 event pairs, 706 based on Foata normal form. 19/5683 useless extension candidates. Maximal degree in co-relation 54365. Up to 5480 conditions per place. [2024-06-27 20:59:57,547 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 432 selfloop transitions, 76 changer transitions 0/511 dead transitions. [2024-06-27 20:59:57,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 511 transitions, 8539 flow [2024-06-27 20:59:57,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:59:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:59:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:59:57,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2024-06-27 20:59:57,549 INFO L175 Difference]: Start difference. First operand has 350 places, 494 transitions, 7465 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:59:57,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 511 transitions, 8539 flow [2024-06-27 20:59:59,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 511 transitions, 8212 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:59:59,889 INFO L231 Difference]: Finished difference. Result has 354 places, 494 transitions, 7296 flow [2024-06-27 20:59:59,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7138, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7296, PETRI_PLACES=354, PETRI_TRANSITIONS=494} [2024-06-27 20:59:59,890 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 313 predicate places. [2024-06-27 20:59:59,890 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 494 transitions, 7296 flow [2024-06-27 20:59:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:59:59,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:59:59,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:59:59,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:59:59,891 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:59:59,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:59:59,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2079638289, now seen corresponding path program 9 times [2024-06-27 20:59:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:59:59,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602240384] [2024-06-27 20:59:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:59:59,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:59:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:00,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602240384] [2024-06-27 21:00:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602240384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:00,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979138928] [2024-06-27 21:00:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:00,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:00,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:00,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:00,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:00,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 494 transitions, 7296 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:00,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:00,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:02,070 INFO L124 PetriNetUnfolderBase]: 4023/6044 cut-off events. [2024-06-27 21:00:02,070 INFO L125 PetriNetUnfolderBase]: For 1004886/1004886 co-relation queries the response was YES. [2024-06-27 21:00:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59021 conditions, 6044 events. 4023/6044 cut-off events. For 1004886/1004886 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 32806 event pairs, 679 based on Foata normal form. 18/6060 useless extension candidates. Maximal degree in co-relation 58857. Up to 5685 conditions per place. [2024-06-27 21:00:02,156 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 471 selfloop transitions, 70 changer transitions 0/544 dead transitions. [2024-06-27 21:00:02,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 544 transitions, 9342 flow [2024-06-27 21:00:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:00:02,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:00:02,158 INFO L175 Difference]: Start difference. First operand has 354 places, 494 transitions, 7296 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:00:02,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 544 transitions, 9342 flow [2024-06-27 21:00:05,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 544 transitions, 9170 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:05,459 INFO L231 Difference]: Finished difference. Result has 359 places, 518 transitions, 7808 flow [2024-06-27 21:00:05,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7124, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7808, PETRI_PLACES=359, PETRI_TRANSITIONS=518} [2024-06-27 21:00:05,459 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-27 21:00:05,459 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 518 transitions, 7808 flow [2024-06-27 21:00:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:05,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:05,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:05,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 21:00:05,460 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:05,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:05,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2079637917, now seen corresponding path program 5 times [2024-06-27 21:00:05,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:05,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909607569] [2024-06-27 21:00:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:05,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:06,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909607569] [2024-06-27 21:00:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909607569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:06,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607144512] [2024-06-27 21:00:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:06,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:06,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:06,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 518 transitions, 7808 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:06,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:06,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:06,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:07,779 INFO L124 PetriNetUnfolderBase]: 4027/6050 cut-off events. [2024-06-27 21:00:07,780 INFO L125 PetriNetUnfolderBase]: For 964493/964493 co-relation queries the response was YES. [2024-06-27 21:00:07,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60277 conditions, 6050 events. 4027/6050 cut-off events. For 964493/964493 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32890 event pairs, 685 based on Foata normal form. 4/6052 useless extension candidates. Maximal degree in co-relation 60110. Up to 5903 conditions per place. [2024-06-27 21:00:07,871 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 486 selfloop transitions, 54 changer transitions 0/543 dead transitions. [2024-06-27 21:00:07,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 543 transitions, 9426 flow [2024-06-27 21:00:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:00:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:00:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-27 21:00:07,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 21:00:07,873 INFO L175 Difference]: Start difference. First operand has 359 places, 518 transitions, 7808 flow. Second operand 9 states and 140 transitions. [2024-06-27 21:00:07,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 543 transitions, 9426 flow [2024-06-27 21:00:11,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 543 transitions, 9182 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:11,441 INFO L231 Difference]: Finished difference. Result has 364 places, 521 transitions, 7747 flow [2024-06-27 21:00:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7747, PETRI_PLACES=364, PETRI_TRANSITIONS=521} [2024-06-27 21:00:11,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 21:00:11,442 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 521 transitions, 7747 flow [2024-06-27 21:00:11,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:11,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 21:00:11,442 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:11,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1899016595, now seen corresponding path program 6 times [2024-06-27 21:00:11,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:11,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077334774] [2024-06-27 21:00:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:11,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:11,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077334774] [2024-06-27 21:00:11,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077334774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:11,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:11,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681992151] [2024-06-27 21:00:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:12,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:12,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 521 transitions, 7747 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:12,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:12,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:12,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:13,512 INFO L124 PetriNetUnfolderBase]: 4037/6063 cut-off events. [2024-06-27 21:00:13,513 INFO L125 PetriNetUnfolderBase]: For 979643/979643 co-relation queries the response was YES. [2024-06-27 21:00:13,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60016 conditions, 6063 events. 4037/6063 cut-off events. For 979643/979643 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32907 event pairs, 753 based on Foata normal form. 2/6063 useless extension candidates. Maximal degree in co-relation 59847. Up to 5969 conditions per place. [2024-06-27 21:00:13,615 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 501 selfloop transitions, 41 changer transitions 0/545 dead transitions. [2024-06-27 21:00:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 545 transitions, 9173 flow [2024-06-27 21:00:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 21:00:13,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 21:00:13,629 INFO L175 Difference]: Start difference. First operand has 364 places, 521 transitions, 7747 flow. Second operand 7 states and 116 transitions. [2024-06-27 21:00:13,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 545 transitions, 9173 flow [2024-06-27 21:00:17,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 545 transitions, 9007 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:17,038 INFO L231 Difference]: Finished difference. Result has 364 places, 524 transitions, 7741 flow [2024-06-27 21:00:17,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7581, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7741, PETRI_PLACES=364, PETRI_TRANSITIONS=524} [2024-06-27 21:00:17,038 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-27 21:00:17,038 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 524 transitions, 7741 flow [2024-06-27 21:00:17,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:17,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:17,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:17,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 21:00:17,039 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:17,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:17,040 INFO L85 PathProgramCache]: Analyzing trace with hash 179813219, now seen corresponding path program 7 times [2024-06-27 21:00:17,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:17,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800340299] [2024-06-27 21:00:17,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:17,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:17,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:17,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800340299] [2024-06-27 21:00:17,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800340299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:17,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:17,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:17,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074473072] [2024-06-27 21:00:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:17,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:17,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 524 transitions, 7741 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:17,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:17,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:17,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:19,081 INFO L124 PetriNetUnfolderBase]: 4021/6042 cut-off events. [2024-06-27 21:00:19,081 INFO L125 PetriNetUnfolderBase]: For 991430/991430 co-relation queries the response was YES. [2024-06-27 21:00:19,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59438 conditions, 6042 events. 4021/6042 cut-off events. For 991430/991430 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32845 event pairs, 684 based on Foata normal form. 4/6044 useless extension candidates. Maximal degree in co-relation 59269. Up to 5921 conditions per place. [2024-06-27 21:00:19,174 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 497 selfloop transitions, 42 changer transitions 0/542 dead transitions. [2024-06-27 21:00:19,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 542 transitions, 8905 flow [2024-06-27 21:00:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-27 21:00:19,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38125 [2024-06-27 21:00:19,175 INFO L175 Difference]: Start difference. First operand has 364 places, 524 transitions, 7741 flow. Second operand 8 states and 122 transitions. [2024-06-27 21:00:19,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 542 transitions, 8905 flow [2024-06-27 21:00:21,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 542 transitions, 8721 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:21,827 INFO L231 Difference]: Finished difference. Result has 367 places, 524 transitions, 7655 flow [2024-06-27 21:00:21,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7655, PETRI_PLACES=367, PETRI_TRANSITIONS=524} [2024-06-27 21:00:21,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 326 predicate places. [2024-06-27 21:00:21,828 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 524 transitions, 7655 flow [2024-06-27 21:00:21,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:21,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:21,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 21:00:21,828 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:21,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash 179397509, now seen corresponding path program 8 times [2024-06-27 21:00:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:21,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27029823] [2024-06-27 21:00:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27029823] [2024-06-27 21:00:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27029823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:22,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:22,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:22,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396546574] [2024-06-27 21:00:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:22,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 524 transitions, 7655 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:22,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:22,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:23,885 INFO L124 PetriNetUnfolderBase]: 4025/6047 cut-off events. [2024-06-27 21:00:23,886 INFO L125 PetriNetUnfolderBase]: For 1002628/1002628 co-relation queries the response was YES. [2024-06-27 21:00:23,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59424 conditions, 6047 events. 4025/6047 cut-off events. For 1002628/1002628 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 32870 event pairs, 732 based on Foata normal form. 4/6049 useless extension candidates. Maximal degree in co-relation 59254. Up to 5745 conditions per place. [2024-06-27 21:00:23,985 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 465 selfloop transitions, 86 changer transitions 0/554 dead transitions. [2024-06-27 21:00:23,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 554 transitions, 9335 flow [2024-06-27 21:00:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 21:00:23,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 21:00:23,987 INFO L175 Difference]: Start difference. First operand has 367 places, 524 transitions, 7655 flow. Second operand 8 states and 138 transitions. [2024-06-27 21:00:23,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 554 transitions, 9335 flow [2024-06-27 21:00:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 554 transitions, 9251 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 21:00:27,639 INFO L231 Difference]: Finished difference. Result has 368 places, 527 transitions, 7838 flow [2024-06-27 21:00:27,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7838, PETRI_PLACES=368, PETRI_TRANSITIONS=527} [2024-06-27 21:00:27,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-27 21:00:27,640 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 527 transitions, 7838 flow [2024-06-27 21:00:27,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:27,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:27,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 21:00:27,641 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:27,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash 179397137, now seen corresponding path program 10 times [2024-06-27 21:00:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271950218] [2024-06-27 21:00:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271950218] [2024-06-27 21:00:28,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271950218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:28,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:28,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348891051] [2024-06-27 21:00:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:28,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:28,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:28,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:28,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 527 transitions, 7838 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:28,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:28,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:28,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:29,918 INFO L124 PetriNetUnfolderBase]: 4367/6522 cut-off events. [2024-06-27 21:00:29,918 INFO L125 PetriNetUnfolderBase]: For 1222304/1222304 co-relation queries the response was YES. [2024-06-27 21:00:30,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66973 conditions, 6522 events. 4367/6522 cut-off events. For 1222304/1222304 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35539 event pairs, 694 based on Foata normal form. 18/6538 useless extension candidates. Maximal degree in co-relation 66802. Up to 5490 conditions per place. [2024-06-27 21:00:30,036 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 438 selfloop transitions, 153 changer transitions 0/594 dead transitions. [2024-06-27 21:00:30,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 594 transitions, 10234 flow [2024-06-27 21:00:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:00:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:00:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 21:00:30,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-06-27 21:00:30,037 INFO L175 Difference]: Start difference. First operand has 368 places, 527 transitions, 7838 flow. Second operand 8 states and 155 transitions. [2024-06-27 21:00:30,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 594 transitions, 10234 flow [2024-06-27 21:00:34,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 594 transitions, 9940 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 21:00:34,362 INFO L231 Difference]: Finished difference. Result has 372 places, 552 transitions, 8574 flow [2024-06-27 21:00:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8574, PETRI_PLACES=372, PETRI_TRANSITIONS=552} [2024-06-27 21:00:34,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-27 21:00:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 552 transitions, 8574 flow [2024-06-27 21:00:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:34,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:34,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 21:00:34,364 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2145647, now seen corresponding path program 11 times [2024-06-27 21:00:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:34,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504354229] [2024-06-27 21:00:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:34,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:34,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:34,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504354229] [2024-06-27 21:00:34,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504354229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:34,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:34,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:34,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199345063] [2024-06-27 21:00:34,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:34,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:34,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:34,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:34,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 552 transitions, 8574 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:34,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:34,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:34,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:36,646 INFO L124 PetriNetUnfolderBase]: 4381/6543 cut-off events. [2024-06-27 21:00:36,646 INFO L125 PetriNetUnfolderBase]: For 1185118/1185118 co-relation queries the response was YES. [2024-06-27 21:00:36,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69072 conditions, 6543 events. 4381/6543 cut-off events. For 1185118/1185118 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35645 event pairs, 766 based on Foata normal form. 6/6547 useless extension candidates. Maximal degree in co-relation 68898. Up to 6363 conditions per place. [2024-06-27 21:00:36,751 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 523 selfloop transitions, 59 changer transitions 0/585 dead transitions. [2024-06-27 21:00:36,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 585 transitions, 9948 flow [2024-06-27 21:00:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:00:36,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 21:00:36,752 INFO L175 Difference]: Start difference. First operand has 372 places, 552 transitions, 8574 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:00:36,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 585 transitions, 9948 flow [2024-06-27 21:00:40,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 585 transitions, 9689 flow, removed 107 selfloop flow, removed 3 redundant places. [2024-06-27 21:00:40,821 INFO L231 Difference]: Finished difference. Result has 377 places, 557 transitions, 8568 flow [2024-06-27 21:00:40,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8321, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8568, PETRI_PLACES=377, PETRI_TRANSITIONS=557} [2024-06-27 21:00:40,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-27 21:00:40,821 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 557 transitions, 8568 flow [2024-06-27 21:00:40,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:40,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:40,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:40,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 21:00:40,822 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:40,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:40,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2503139, now seen corresponding path program 9 times [2024-06-27 21:00:40,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:40,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889808245] [2024-06-27 21:00:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:40,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889808245] [2024-06-27 21:00:41,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889808245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:41,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:41,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123492843] [2024-06-27 21:00:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:41,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:41,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:41,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:41,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 557 transitions, 8568 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:41,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:41,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:41,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:43,140 INFO L124 PetriNetUnfolderBase]: 4375/6534 cut-off events. [2024-06-27 21:00:43,140 INFO L125 PetriNetUnfolderBase]: For 1180862/1180862 co-relation queries the response was YES. [2024-06-27 21:00:43,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68452 conditions, 6534 events. 4375/6534 cut-off events. For 1180862/1180862 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35648 event pairs, 790 based on Foata normal form. 2/6534 useless extension candidates. Maximal degree in co-relation 68275. Up to 6476 conditions per place. [2024-06-27 21:00:43,238 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 543 selfloop transitions, 27 changer transitions 0/573 dead transitions. [2024-06-27 21:00:43,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 573 transitions, 9768 flow [2024-06-27 21:00:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 21:00:43,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-27 21:00:43,239 INFO L175 Difference]: Start difference. First operand has 377 places, 557 transitions, 8568 flow. Second operand 7 states and 109 transitions. [2024-06-27 21:00:43,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 573 transitions, 9768 flow [2024-06-27 21:00:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 573 transitions, 9620 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 21:00:47,130 INFO L231 Difference]: Finished difference. Result has 380 places, 557 transitions, 8480 flow [2024-06-27 21:00:47,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8420, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8480, PETRI_PLACES=380, PETRI_TRANSITIONS=557} [2024-06-27 21:00:47,131 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-27 21:00:47,131 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 557 transitions, 8480 flow [2024-06-27 21:00:47,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:47,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:47,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:47,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 21:00:47,132 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2265617, now seen corresponding path program 12 times [2024-06-27 21:00:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792688115] [2024-06-27 21:00:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:47,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:47,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792688115] [2024-06-27 21:00:47,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792688115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:47,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:47,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:00:47,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781983935] [2024-06-27 21:00:47,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:47,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:00:47,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:47,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:00:47,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:00:47,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:47,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 557 transitions, 8480 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:47,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:47,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:47,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:49,324 INFO L124 PetriNetUnfolderBase]: 4385/6549 cut-off events. [2024-06-27 21:00:49,324 INFO L125 PetriNetUnfolderBase]: For 1207397/1207397 co-relation queries the response was YES. [2024-06-27 21:00:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 6549 events. 4385/6549 cut-off events. For 1207397/1207397 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35687 event pairs, 739 based on Foata normal form. 6/6553 useless extension candidates. Maximal degree in co-relation 68169. Up to 6254 conditions per place. [2024-06-27 21:00:49,433 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 510 selfloop transitions, 80 changer transitions 0/593 dead transitions. [2024-06-27 21:00:49,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 593 transitions, 10186 flow [2024-06-27 21:00:49,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:00:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:00:49,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 21:00:49,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 21:00:49,435 INFO L175 Difference]: Start difference. First operand has 380 places, 557 transitions, 8480 flow. Second operand 7 states and 128 transitions. [2024-06-27 21:00:49,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 593 transitions, 10186 flow [2024-06-27 21:00:53,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 593 transitions, 10074 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:53,394 INFO L231 Difference]: Finished difference. Result has 383 places, 564 transitions, 8794 flow [2024-06-27 21:00:53,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8368, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8794, PETRI_PLACES=383, PETRI_TRANSITIONS=564} [2024-06-27 21:00:53,394 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-27 21:00:53,395 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 564 transitions, 8794 flow [2024-06-27 21:00:53,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:53,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:53,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:53,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 21:00:53,395 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:53,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:53,412 INFO L85 PathProgramCache]: Analyzing trace with hash 14130557, now seen corresponding path program 2 times [2024-06-27 21:00:53,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:53,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182887653] [2024-06-27 21:00:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:00:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:00:54,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:00:54,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182887653] [2024-06-27 21:00:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182887653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:00:54,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:00:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:00:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717501102] [2024-06-27 21:00:54,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:00:54,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:00:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:00:54,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:00:54,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:00:54,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:00:54,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 564 transitions, 8794 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:54,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:00:54,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:00:54,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:00:55,905 INFO L124 PetriNetUnfolderBase]: 4393/6561 cut-off events. [2024-06-27 21:00:55,905 INFO L125 PetriNetUnfolderBase]: For 1221083/1221083 co-relation queries the response was YES. [2024-06-27 21:00:56,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69231 conditions, 6561 events. 4393/6561 cut-off events. For 1221083/1221083 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35819 event pairs, 807 based on Foata normal form. 2/6561 useless extension candidates. Maximal degree in co-relation 69052. Up to 6498 conditions per place. [2024-06-27 21:00:56,035 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 551 selfloop transitions, 27 changer transitions 0/581 dead transitions. [2024-06-27 21:00:56,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 581 transitions, 10066 flow [2024-06-27 21:00:56,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:00:56,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:00:56,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-27 21:00:56,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-27 21:00:56,037 INFO L175 Difference]: Start difference. First operand has 383 places, 564 transitions, 8794 flow. Second operand 6 states and 99 transitions. [2024-06-27 21:00:56,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 581 transitions, 10066 flow [2024-06-27 21:00:59,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 581 transitions, 9905 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 21:00:59,554 INFO L231 Difference]: Finished difference. Result has 384 places, 566 transitions, 8762 flow [2024-06-27 21:00:59,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8633, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8762, PETRI_PLACES=384, PETRI_TRANSITIONS=566} [2024-06-27 21:00:59,555 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 343 predicate places. [2024-06-27 21:00:59,555 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 566 transitions, 8762 flow [2024-06-27 21:00:59,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:00:59,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:00:59,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:00:59,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 21:00:59,556 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:00:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:00:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1912283071, now seen corresponding path program 3 times [2024-06-27 21:00:59,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:00:59,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394396125] [2024-06-27 21:00:59,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:00:59,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:00:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:00,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394396125] [2024-06-27 21:01:00,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394396125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:00,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:00,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:00,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728936093] [2024-06-27 21:01:00,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:00,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:00,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:00,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:00,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:00,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:00,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 566 transitions, 8762 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:00,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:00,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:00,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:02,131 INFO L124 PetriNetUnfolderBase]: 4401/6573 cut-off events. [2024-06-27 21:01:02,131 INFO L125 PetriNetUnfolderBase]: For 1220142/1220142 co-relation queries the response was YES. [2024-06-27 21:01:02,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69226 conditions, 6573 events. 4401/6573 cut-off events. For 1220142/1220142 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35879 event pairs, 798 based on Foata normal form. 2/6573 useless extension candidates. Maximal degree in co-relation 69047. Up to 6496 conditions per place. [2024-06-27 21:01:02,229 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 551 selfloop transitions, 31 changer transitions 0/585 dead transitions. [2024-06-27 21:01:02,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 585 transitions, 10050 flow [2024-06-27 21:01:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:01:02,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:01:02,231 INFO L175 Difference]: Start difference. First operand has 384 places, 566 transitions, 8762 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:01:02,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 585 transitions, 10050 flow [2024-06-27 21:01:05,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 585 transitions, 9937 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 21:01:05,874 INFO L231 Difference]: Finished difference. Result has 387 places, 568 transitions, 8790 flow [2024-06-27 21:01:05,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8649, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8790, PETRI_PLACES=387, PETRI_TRANSITIONS=568} [2024-06-27 21:01:05,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 346 predicate places. [2024-06-27 21:01:05,875 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 568 transitions, 8790 flow [2024-06-27 21:01:05,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:05,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:05,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 21:01:05,875 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:05,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1924688527, now seen corresponding path program 4 times [2024-06-27 21:01:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:05,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549160229] [2024-06-27 21:01:05,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:05,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:06,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:06,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549160229] [2024-06-27 21:01:06,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549160229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:06,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:06,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:06,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588763469] [2024-06-27 21:01:06,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:06,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:06,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:06,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:06,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:06,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 568 transitions, 8790 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:06,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:06,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:06,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:08,540 INFO L124 PetriNetUnfolderBase]: 4440/6634 cut-off events. [2024-06-27 21:01:08,540 INFO L125 PetriNetUnfolderBase]: For 1296936/1296936 co-relation queries the response was YES. [2024-06-27 21:01:08,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69817 conditions, 6634 events. 4440/6634 cut-off events. For 1296936/1296936 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36187 event pairs, 685 based on Foata normal form. 14/6646 useless extension candidates. Maximal degree in co-relation 69637. Up to 6404 conditions per place. [2024-06-27 21:01:08,636 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 548 selfloop transitions, 50 changer transitions 0/601 dead transitions. [2024-06-27 21:01:08,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 601 transitions, 10186 flow [2024-06-27 21:01:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 21:01:08,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-06-27 21:01:08,637 INFO L175 Difference]: Start difference. First operand has 387 places, 568 transitions, 8790 flow. Second operand 7 states and 129 transitions. [2024-06-27 21:01:08,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 601 transitions, 10186 flow [2024-06-27 21:01:12,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 601 transitions, 10051 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:12,193 INFO L231 Difference]: Finished difference. Result has 389 places, 569 transitions, 8800 flow [2024-06-27 21:01:12,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8800, PETRI_PLACES=389, PETRI_TRANSITIONS=569} [2024-06-27 21:01:12,196 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 348 predicate places. [2024-06-27 21:01:12,196 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 569 transitions, 8800 flow [2024-06-27 21:01:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:12,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:12,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:12,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 21:01:12,197 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:12,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:12,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1924319131, now seen corresponding path program 4 times [2024-06-27 21:01:12,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:12,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765379984] [2024-06-27 21:01:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:12,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:12,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765379984] [2024-06-27 21:01:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765379984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:13,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:13,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591786733] [2024-06-27 21:01:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:13,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:13,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 569 transitions, 8800 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:13,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:13,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:13,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:15,023 INFO L124 PetriNetUnfolderBase]: 4435/6627 cut-off events. [2024-06-27 21:01:15,024 INFO L125 PetriNetUnfolderBase]: For 1241963/1241963 co-relation queries the response was YES. [2024-06-27 21:01:15,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69790 conditions, 6627 events. 4435/6627 cut-off events. For 1241963/1241963 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36273 event pairs, 818 based on Foata normal form. 2/6627 useless extension candidates. Maximal degree in co-relation 69609. Up to 6558 conditions per place. [2024-06-27 21:01:15,113 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 552 selfloop transitions, 32 changer transitions 0/587 dead transitions. [2024-06-27 21:01:15,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 587 transitions, 10096 flow [2024-06-27 21:01:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:01:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:01:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 21:01:15,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3964285714285714 [2024-06-27 21:01:15,115 INFO L175 Difference]: Start difference. First operand has 389 places, 569 transitions, 8800 flow. Second operand 7 states and 111 transitions. [2024-06-27 21:01:15,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 587 transitions, 10096 flow [2024-06-27 21:01:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 587 transitions, 9983 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:18,345 INFO L231 Difference]: Finished difference. Result has 391 places, 571 transitions, 8836 flow [2024-06-27 21:01:18,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8689, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8836, PETRI_PLACES=391, PETRI_TRANSITIONS=571} [2024-06-27 21:01:18,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 350 predicate places. [2024-06-27 21:01:18,346 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 571 transitions, 8836 flow [2024-06-27 21:01:18,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:18,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:18,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 21:01:18,347 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:18,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 564617009, now seen corresponding path program 1 times [2024-06-27 21:01:18,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:18,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565373868] [2024-06-27 21:01:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565373868] [2024-06-27 21:01:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565373868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233703834] [2024-06-27 21:01:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:19,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:19,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 571 transitions, 8836 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:19,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:19,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:19,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:20,753 INFO L124 PetriNetUnfolderBase]: 4464/6672 cut-off events. [2024-06-27 21:01:20,753 INFO L125 PetriNetUnfolderBase]: For 1273104/1273131 co-relation queries the response was YES. [2024-06-27 21:01:20,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70303 conditions, 6672 events. 4464/6672 cut-off events. For 1273104/1273131 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36714 event pairs, 718 based on Foata normal form. 22/6688 useless extension candidates. Maximal degree in co-relation 70121. Up to 6353 conditions per place. [2024-06-27 21:01:20,873 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 500 selfloop transitions, 102 changer transitions 0/605 dead transitions. [2024-06-27 21:01:20,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 605 transitions, 10720 flow [2024-06-27 21:01:20,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:01:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:01:20,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 21:01:20,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40555555555555556 [2024-06-27 21:01:20,874 INFO L175 Difference]: Start difference. First operand has 391 places, 571 transitions, 8836 flow. Second operand 9 states and 146 transitions. [2024-06-27 21:01:20,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 605 transitions, 10720 flow [2024-06-27 21:01:25,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 605 transitions, 10587 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:25,094 INFO L231 Difference]: Finished difference. Result has 395 places, 577 transitions, 9099 flow [2024-06-27 21:01:25,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9099, PETRI_PLACES=395, PETRI_TRANSITIONS=577} [2024-06-27 21:01:25,095 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-27 21:01:25,095 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 577 transitions, 9099 flow [2024-06-27 21:01:25,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:25,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:25,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:25,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 21:01:25,096 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:25,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 700633511, now seen corresponding path program 1 times [2024-06-27 21:01:25,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:25,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236131959] [2024-06-27 21:01:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:25,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:25,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:25,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236131959] [2024-06-27 21:01:25,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236131959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:25,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:25,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:25,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746955677] [2024-06-27 21:01:25,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:25,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:25,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:25,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:25,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:25,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 577 transitions, 9099 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:25,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:25,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:25,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:27,562 INFO L124 PetriNetUnfolderBase]: 4500/6722 cut-off events. [2024-06-27 21:01:27,562 INFO L125 PetriNetUnfolderBase]: For 1306060/1306087 co-relation queries the response was YES. [2024-06-27 21:01:27,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71644 conditions, 6722 events. 4500/6722 cut-off events. For 1306060/1306087 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 36959 event pairs, 749 based on Foata normal form. 22/6738 useless extension candidates. Maximal degree in co-relation 71461. Up to 6033 conditions per place. [2024-06-27 21:01:27,676 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 421 selfloop transitions, 192 changer transitions 0/616 dead transitions. [2024-06-27 21:01:27,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 616 transitions, 11323 flow [2024-06-27 21:01:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 176 transitions. [2024-06-27 21:01:27,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:01:27,677 INFO L175 Difference]: Start difference. First operand has 395 places, 577 transitions, 9099 flow. Second operand 11 states and 176 transitions. [2024-06-27 21:01:27,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 616 transitions, 11323 flow [2024-06-27 21:01:31,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 616 transitions, 11074 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 21:01:31,604 INFO L231 Difference]: Finished difference. Result has 401 places, 585 transitions, 9498 flow [2024-06-27 21:01:31,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8850, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9498, PETRI_PLACES=401, PETRI_TRANSITIONS=585} [2024-06-27 21:01:31,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 360 predicate places. [2024-06-27 21:01:31,605 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 585 transitions, 9498 flow [2024-06-27 21:01:31,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:31,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:31,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:31,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 21:01:31,605 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:31,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:31,606 INFO L85 PathProgramCache]: Analyzing trace with hash 700633387, now seen corresponding path program 2 times [2024-06-27 21:01:31,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:31,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898975285] [2024-06-27 21:01:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:31,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:32,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:32,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:32,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898975285] [2024-06-27 21:01:32,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898975285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:32,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:32,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:32,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453657420] [2024-06-27 21:01:32,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:32,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:32,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:32,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:32,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:32,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:32,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 585 transitions, 9498 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:32,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:32,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:32,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:34,146 INFO L124 PetriNetUnfolderBase]: 4516/6746 cut-off events. [2024-06-27 21:01:34,146 INFO L125 PetriNetUnfolderBase]: For 1338732/1338759 co-relation queries the response was YES. [2024-06-27 21:01:34,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72735 conditions, 6746 events. 4516/6746 cut-off events. For 1338732/1338759 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37166 event pairs, 812 based on Foata normal form. 22/6762 useless extension candidates. Maximal degree in co-relation 72550. Up to 6496 conditions per place. [2024-06-27 21:01:34,250 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 511 selfloop transitions, 98 changer transitions 0/612 dead transitions. [2024-06-27 21:01:34,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 612 transitions, 11056 flow [2024-06-27 21:01:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:01:34,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-27 21:01:34,252 INFO L175 Difference]: Start difference. First operand has 401 places, 585 transitions, 9498 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:01:34,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 612 transitions, 11056 flow [2024-06-27 21:01:37,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 612 transitions, 10694 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-27 21:01:37,743 INFO L231 Difference]: Finished difference. Result has 404 places, 588 transitions, 9398 flow [2024-06-27 21:01:37,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9136, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9398, PETRI_PLACES=404, PETRI_TRANSITIONS=588} [2024-06-27 21:01:37,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 363 predicate places. [2024-06-27 21:01:37,743 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 588 transitions, 9398 flow [2024-06-27 21:01:37,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:37,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:37,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:37,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 21:01:37,744 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:37,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:37,744 INFO L85 PathProgramCache]: Analyzing trace with hash 818721067, now seen corresponding path program 3 times [2024-06-27 21:01:37,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:37,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669357815] [2024-06-27 21:01:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:37,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:38,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:38,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:38,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669357815] [2024-06-27 21:01:38,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669357815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:38,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:38,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:38,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529355227] [2024-06-27 21:01:38,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:38,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:38,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:38,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:38,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 588 transitions, 9398 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:38,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:38,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:38,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:40,383 INFO L124 PetriNetUnfolderBase]: 4620/6905 cut-off events. [2024-06-27 21:01:40,384 INFO L125 PetriNetUnfolderBase]: For 1494451/1494451 co-relation queries the response was YES. [2024-06-27 21:01:40,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74537 conditions, 6905 events. 4620/6905 cut-off events. For 1494451/1494451 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38186 event pairs, 763 based on Foata normal form. 28/6931 useless extension candidates. Maximal degree in co-relation 74350. Up to 6666 conditions per place. [2024-06-27 21:01:40,486 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 563 selfloop transitions, 54 changer transitions 0/620 dead transitions. [2024-06-27 21:01:40,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 620 transitions, 10974 flow [2024-06-27 21:01:40,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:40,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:40,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-27 21:01:40,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-06-27 21:01:40,488 INFO L175 Difference]: Start difference. First operand has 404 places, 588 transitions, 9398 flow. Second operand 10 states and 156 transitions. [2024-06-27 21:01:40,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 620 transitions, 10974 flow [2024-06-27 21:01:44,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 620 transitions, 10707 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 21:01:44,938 INFO L231 Difference]: Finished difference. Result has 405 places, 593 transitions, 9404 flow [2024-06-27 21:01:44,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9131, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9404, PETRI_PLACES=405, PETRI_TRANSITIONS=593} [2024-06-27 21:01:44,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 364 predicate places. [2024-06-27 21:01:44,939 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 593 transitions, 9404 flow [2024-06-27 21:01:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:44,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:44,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:44,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 21:01:44,939 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:44,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:44,940 INFO L85 PathProgramCache]: Analyzing trace with hash 682769913, now seen corresponding path program 2 times [2024-06-27 21:01:44,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:44,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485720146] [2024-06-27 21:01:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:44,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:45,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485720146] [2024-06-27 21:01:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485720146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:45,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:45,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239006474] [2024-06-27 21:01:45,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:45,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:45,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 593 transitions, 9404 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:45,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:45,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:45,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:47,635 INFO L124 PetriNetUnfolderBase]: 4640/6933 cut-off events. [2024-06-27 21:01:47,635 INFO L125 PetriNetUnfolderBase]: For 1393704/1393704 co-relation queries the response was YES. [2024-06-27 21:01:47,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75056 conditions, 6933 events. 4640/6933 cut-off events. For 1393704/1393704 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 38387 event pairs, 735 based on Foata normal form. 4/6935 useless extension candidates. Maximal degree in co-relation 74868. Up to 6770 conditions per place. [2024-06-27 21:01:47,737 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 560 selfloop transitions, 58 changer transitions 0/621 dead transitions. [2024-06-27 21:01:47,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 621 transitions, 11280 flow [2024-06-27 21:01:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:01:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:01:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:01:47,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-27 21:01:47,739 INFO L175 Difference]: Start difference. First operand has 405 places, 593 transitions, 9404 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:01:47,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 621 transitions, 11280 flow [2024-06-27 21:01:51,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 621 transitions, 11117 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 21:01:51,888 INFO L231 Difference]: Finished difference. Result has 407 places, 597 transitions, 9474 flow [2024-06-27 21:01:51,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9241, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9474, PETRI_PLACES=407, PETRI_TRANSITIONS=597} [2024-06-27 21:01:51,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 366 predicate places. [2024-06-27 21:01:51,889 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 597 transitions, 9474 flow [2024-06-27 21:01:51,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:51,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:51,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:51,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 21:01:51,889 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:51,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:51,890 INFO L85 PathProgramCache]: Analyzing trace with hash 818721191, now seen corresponding path program 3 times [2024-06-27 21:01:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:51,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325882271] [2024-06-27 21:01:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:51,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:01:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:01:52,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:01:52,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325882271] [2024-06-27 21:01:52,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325882271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:01:52,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:01:52,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:01:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171042507] [2024-06-27 21:01:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:01:52,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:01:52,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:01:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:01:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:01:52,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:01:52,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 597 transitions, 9474 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:52,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:01:52,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:01:52,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:01:54,826 INFO L124 PetriNetUnfolderBase]: 4676/6983 cut-off events. [2024-06-27 21:01:54,826 INFO L125 PetriNetUnfolderBase]: For 1421955/1421955 co-relation queries the response was YES. [2024-06-27 21:01:54,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75624 conditions, 6983 events. 4676/6983 cut-off events. For 1421955/1421955 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38645 event pairs, 755 based on Foata normal form. 4/6985 useless extension candidates. Maximal degree in co-relation 75435. Up to 6773 conditions per place. [2024-06-27 21:01:54,932 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 555 selfloop transitions, 73 changer transitions 0/631 dead transitions. [2024-06-27 21:01:54,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 631 transitions, 11688 flow [2024-06-27 21:01:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 21:01:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 21:01:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 168 transitions. [2024-06-27 21:01:54,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-27 21:01:54,934 INFO L175 Difference]: Start difference. First operand has 407 places, 597 transitions, 9474 flow. Second operand 11 states and 168 transitions. [2024-06-27 21:01:54,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 631 transitions, 11688 flow [2024-06-27 21:01:59,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 631 transitions, 11491 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 21:01:59,484 INFO L231 Difference]: Finished difference. Result has 410 places, 604 transitions, 9631 flow [2024-06-27 21:01:59,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9277, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9631, PETRI_PLACES=410, PETRI_TRANSITIONS=604} [2024-06-27 21:01:59,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 369 predicate places. [2024-06-27 21:01:59,485 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 604 transitions, 9631 flow [2024-06-27 21:01:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:01:59,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:01:59,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:01:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 21:01:59,486 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:01:59,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:01:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash 818905765, now seen corresponding path program 1 times [2024-06-27 21:01:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:01:59,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066801426] [2024-06-27 21:01:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:01:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:01:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:00,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:00,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066801426] [2024-06-27 21:02:00,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066801426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:00,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:00,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:00,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465551950] [2024-06-27 21:02:00,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:00,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:00,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:00,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:00,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:00,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 604 transitions, 9631 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:00,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:00,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:00,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:02,160 INFO L124 PetriNetUnfolderBase]: 4684/6995 cut-off events. [2024-06-27 21:02:02,161 INFO L125 PetriNetUnfolderBase]: For 1434512/1434512 co-relation queries the response was YES. [2024-06-27 21:02:02,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75954 conditions, 6995 events. 4684/6995 cut-off events. For 1434512/1434512 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38766 event pairs, 761 based on Foata normal form. 2/6995 useless extension candidates. Maximal degree in co-relation 75764. Up to 6932 conditions per place. [2024-06-27 21:02:02,266 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 592 selfloop transitions, 28 changer transitions 0/623 dead transitions. [2024-06-27 21:02:02,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 623 transitions, 11009 flow [2024-06-27 21:02:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:02:02,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:02:02,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-27 21:02:02,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36875 [2024-06-27 21:02:02,267 INFO L175 Difference]: Start difference. First operand has 410 places, 604 transitions, 9631 flow. Second operand 8 states and 118 transitions. [2024-06-27 21:02:02,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 623 transitions, 11009 flow [2024-06-27 21:02:06,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 623 transitions, 10845 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:06,604 INFO L231 Difference]: Finished difference. Result has 411 places, 606 transitions, 9602 flow [2024-06-27 21:02:06,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9467, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9602, PETRI_PLACES=411, PETRI_TRANSITIONS=606} [2024-06-27 21:02:06,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-27 21:02:06,605 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 606 transitions, 9602 flow [2024-06-27 21:02:06,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:06,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:06,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:06,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 21:02:06,606 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:06,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash 416003211, now seen corresponding path program 1 times [2024-06-27 21:02:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:06,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461145228] [2024-06-27 21:02:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:06,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:06,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:07,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:07,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461145228] [2024-06-27 21:02:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461145228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:07,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818534944] [2024-06-27 21:02:07,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:07,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:07,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:07,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:07,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 606 transitions, 9602 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:07,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:07,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:07,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:09,400 INFO L124 PetriNetUnfolderBase]: 4680/6989 cut-off events. [2024-06-27 21:02:09,401 INFO L125 PetriNetUnfolderBase]: For 1453329/1453329 co-relation queries the response was YES. [2024-06-27 21:02:09,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75843 conditions, 6989 events. 4680/6989 cut-off events. For 1453329/1453329 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 38753 event pairs, 829 based on Foata normal form. 2/6989 useless extension candidates. Maximal degree in co-relation 75651. Up to 6766 conditions per place. [2024-06-27 21:02:09,512 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 556 selfloop transitions, 80 changer transitions 0/639 dead transitions. [2024-06-27 21:02:09,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 639 transitions, 11487 flow [2024-06-27 21:02:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 21:02:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 21:02:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 21:02:09,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:02:09,514 INFO L175 Difference]: Start difference. First operand has 411 places, 606 transitions, 9602 flow. Second operand 7 states and 126 transitions. [2024-06-27 21:02:09,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 639 transitions, 11487 flow [2024-06-27 21:02:14,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 639 transitions, 11328 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 21:02:14,973 INFO L231 Difference]: Finished difference. Result has 413 places, 615 transitions, 10001 flow [2024-06-27 21:02:14,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9443, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10001, PETRI_PLACES=413, PETRI_TRANSITIONS=615} [2024-06-27 21:02:14,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 372 predicate places. [2024-06-27 21:02:14,974 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 615 transitions, 10001 flow [2024-06-27 21:02:14,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:14,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:14,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:14,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 21:02:14,975 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:14,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:14,976 INFO L85 PathProgramCache]: Analyzing trace with hash 407729249, now seen corresponding path program 2 times [2024-06-27 21:02:14,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:14,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992472376] [2024-06-27 21:02:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:15,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:15,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992472376] [2024-06-27 21:02:15,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992472376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:15,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:15,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:15,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152003663] [2024-06-27 21:02:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:15,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:15,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:15,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:15,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 615 transitions, 10001 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:15,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:15,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:15,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:17,641 INFO L124 PetriNetUnfolderBase]: 4688/7002 cut-off events. [2024-06-27 21:02:17,642 INFO L125 PetriNetUnfolderBase]: For 1480082/1480082 co-relation queries the response was YES. [2024-06-27 21:02:17,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76647 conditions, 7002 events. 4688/7002 cut-off events. For 1480082/1480082 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38792 event pairs, 744 based on Foata normal form. 2/7002 useless extension candidates. Maximal degree in co-relation 76454. Up to 6931 conditions per place. [2024-06-27 21:02:17,752 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 600 selfloop transitions, 28 changer transitions 0/631 dead transitions. [2024-06-27 21:02:17,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 631 transitions, 11385 flow [2024-06-27 21:02:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:02:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:02:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 21:02:17,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 21:02:17,753 INFO L175 Difference]: Start difference. First operand has 413 places, 615 transitions, 10001 flow. Second operand 6 states and 95 transitions. [2024-06-27 21:02:17,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 631 transitions, 11385 flow [2024-06-27 21:02:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 631 transitions, 11245 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 21:02:23,710 INFO L231 Difference]: Finished difference. Result has 416 places, 617 transitions, 10004 flow [2024-06-27 21:02:23,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9861, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10004, PETRI_PLACES=416, PETRI_TRANSITIONS=617} [2024-06-27 21:02:23,711 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 375 predicate places. [2024-06-27 21:02:23,711 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 617 transitions, 10004 flow [2024-06-27 21:02:23,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:23,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:23,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:23,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 21:02:23,712 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:23,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash 416300129, now seen corresponding path program 3 times [2024-06-27 21:02:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:23,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509282923] [2024-06-27 21:02:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:23,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:24,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509282923] [2024-06-27 21:02:24,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509282923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:24,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:24,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505778450] [2024-06-27 21:02:24,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:24,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:24,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:24,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:24,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:24,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:24,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 617 transitions, 10004 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:24,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:24,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:24,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:26,549 INFO L124 PetriNetUnfolderBase]: 4696/7027 cut-off events. [2024-06-27 21:02:26,550 INFO L125 PetriNetUnfolderBase]: For 1514804/1514804 co-relation queries the response was YES. [2024-06-27 21:02:26,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77058 conditions, 7027 events. 4696/7027 cut-off events. For 1514804/1514804 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39144 event pairs, 1488 based on Foata normal form. 2/7027 useless extension candidates. Maximal degree in co-relation 76863. Up to 6973 conditions per place. [2024-06-27 21:02:26,665 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 611 selfloop transitions, 19 changer transitions 0/633 dead transitions. [2024-06-27 21:02:26,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 633 transitions, 11410 flow [2024-06-27 21:02:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-27 21:02:26,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277777777777778 [2024-06-27 21:02:26,666 INFO L175 Difference]: Start difference. First operand has 416 places, 617 transitions, 10004 flow. Second operand 9 states and 118 transitions. [2024-06-27 21:02:26,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 633 transitions, 11410 flow [2024-06-27 21:02:31,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 633 transitions, 11283 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:31,609 INFO L231 Difference]: Finished difference. Result has 422 places, 621 transitions, 10043 flow [2024-06-27 21:02:31,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10043, PETRI_PLACES=422, PETRI_TRANSITIONS=621} [2024-06-27 21:02:31,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 381 predicate places. [2024-06-27 21:02:31,609 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 621 transitions, 10043 flow [2024-06-27 21:02:31,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:31,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:31,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:31,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 21:02:31,610 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:31,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:31,610 INFO L85 PathProgramCache]: Analyzing trace with hash -520219995, now seen corresponding path program 4 times [2024-06-27 21:02:31,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:31,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096243495] [2024-06-27 21:02:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:31,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:32,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096243495] [2024-06-27 21:02:32,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096243495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:32,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:32,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:32,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129214600] [2024-06-27 21:02:32,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:32,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:32,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:32,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:32,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:32,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:32,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 621 transitions, 10043 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:32,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:32,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:32,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:34,227 INFO L124 PetriNetUnfolderBase]: 4691/7020 cut-off events. [2024-06-27 21:02:34,227 INFO L125 PetriNetUnfolderBase]: For 1503311/1503311 co-relation queries the response was YES. [2024-06-27 21:02:34,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76591 conditions, 7020 events. 4691/7020 cut-off events. For 1503311/1503311 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39174 event pairs, 1398 based on Foata normal form. 2/7020 useless extension candidates. Maximal degree in co-relation 76394. Up to 6924 conditions per place. [2024-06-27 21:02:34,335 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 597 selfloop transitions, 36 changer transitions 0/636 dead transitions. [2024-06-27 21:02:34,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 636 transitions, 11435 flow [2024-06-27 21:02:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 21:02:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 21:02:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-27 21:02:34,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:02:34,336 INFO L175 Difference]: Start difference. First operand has 422 places, 621 transitions, 10043 flow. Second operand 6 states and 96 transitions. [2024-06-27 21:02:34,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 636 transitions, 11435 flow [2024-06-27 21:02:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 636 transitions, 11292 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 21:02:39,662 INFO L231 Difference]: Finished difference. Result has 420 places, 623 transitions, 10066 flow [2024-06-27 21:02:39,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9900, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10066, PETRI_PLACES=420, PETRI_TRANSITIONS=623} [2024-06-27 21:02:39,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 379 predicate places. [2024-06-27 21:02:39,663 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 623 transitions, 10066 flow [2024-06-27 21:02:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:39,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:39,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:39,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 21:02:39,663 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:39,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 179648175, now seen corresponding path program 4 times [2024-06-27 21:02:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:39,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374162339] [2024-06-27 21:02:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374162339] [2024-06-27 21:02:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374162339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:40,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794709087] [2024-06-27 21:02:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:40,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:40,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 623 transitions, 10066 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:40,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:40,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:40,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:42,396 INFO L124 PetriNetUnfolderBase]: 4711/7046 cut-off events. [2024-06-27 21:02:42,397 INFO L125 PetriNetUnfolderBase]: For 1542080/1542084 co-relation queries the response was YES. [2024-06-27 21:02:42,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77147 conditions, 7046 events. 4711/7046 cut-off events. For 1542080/1542084 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 39343 event pairs, 1183 based on Foata normal form. 8/7052 useless extension candidates. Maximal degree in co-relation 76953. Up to 6721 conditions per place. [2024-06-27 21:02:42,512 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 555 selfloop transitions, 97 changer transitions 0/655 dead transitions. [2024-06-27 21:02:42,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 655 transitions, 12052 flow [2024-06-27 21:02:42,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:42,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:02:42,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 21:02:42,513 INFO L175 Difference]: Start difference. First operand has 420 places, 623 transitions, 10066 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:02:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 655 transitions, 12052 flow [2024-06-27 21:02:47,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 655 transitions, 11910 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 21:02:47,545 INFO L231 Difference]: Finished difference. Result has 425 places, 627 transitions, 10255 flow [2024-06-27 21:02:47,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9928, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10255, PETRI_PLACES=425, PETRI_TRANSITIONS=627} [2024-06-27 21:02:47,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 384 predicate places. [2024-06-27 21:02:47,546 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 627 transitions, 10255 flow [2024-06-27 21:02:47,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:47,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:47,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:47,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 21:02:47,546 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:47,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash 179643401, now seen corresponding path program 4 times [2024-06-27 21:02:47,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:47,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150225128] [2024-06-27 21:02:47,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:47,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:48,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:48,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150225128] [2024-06-27 21:02:48,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150225128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:48,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:48,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:48,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929450777] [2024-06-27 21:02:48,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:48,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:48,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:48,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:48,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:48,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:48,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 627 transitions, 10255 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:48,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:48,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:48,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:50,329 INFO L124 PetriNetUnfolderBase]: 4802/7187 cut-off events. [2024-06-27 21:02:50,330 INFO L125 PetriNetUnfolderBase]: For 1687710/1687714 co-relation queries the response was YES. [2024-06-27 21:02:50,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78772 conditions, 7187 events. 4802/7187 cut-off events. For 1687710/1687714 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 40218 event pairs, 1122 based on Foata normal form. 32/7217 useless extension candidates. Maximal degree in co-relation 78577. Up to 6793 conditions per place. [2024-06-27 21:02:50,446 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 581 selfloop transitions, 84 changer transitions 0/668 dead transitions. [2024-06-27 21:02:50,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 668 transitions, 11943 flow [2024-06-27 21:02:50,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:02:50,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:02:50,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 21:02:50,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 21:02:50,447 INFO L175 Difference]: Start difference. First operand has 425 places, 627 transitions, 10255 flow. Second operand 9 states and 162 transitions. [2024-06-27 21:02:50,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 668 transitions, 11943 flow [2024-06-27 21:02:55,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 668 transitions, 11652 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 21:02:55,149 INFO L231 Difference]: Finished difference. Result has 427 places, 631 transitions, 10287 flow [2024-06-27 21:02:55,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9964, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10287, PETRI_PLACES=427, PETRI_TRANSITIONS=631} [2024-06-27 21:02:55,149 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 386 predicate places. [2024-06-27 21:02:55,150 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 631 transitions, 10287 flow [2024-06-27 21:02:55,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:55,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:02:55,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:02:55,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 21:02:55,152 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:02:55,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:02:55,152 INFO L85 PathProgramCache]: Analyzing trace with hash 179643525, now seen corresponding path program 5 times [2024-06-27 21:02:55,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:02:55,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065894172] [2024-06-27 21:02:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:02:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:02:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:02:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:02:55,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:02:55,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065894172] [2024-06-27 21:02:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065894172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:02:55,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:02:55,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:02:55,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098677122] [2024-06-27 21:02:55,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:02:55,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:02:55,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:02:55,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:02:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:02:56,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:02:56,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 631 transitions, 10287 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:02:56,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:02:56,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:02:56,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:02:57,964 INFO L124 PetriNetUnfolderBase]: 4838/7237 cut-off events. [2024-06-27 21:02:57,965 INFO L125 PetriNetUnfolderBase]: For 1576575/1576579 co-relation queries the response was YES. [2024-06-27 21:02:58,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79813 conditions, 7237 events. 4838/7237 cut-off events. For 1576575/1576579 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 40530 event pairs, 1162 based on Foata normal form. 8/7243 useless extension candidates. Maximal degree in co-relation 79617. Up to 6832 conditions per place. [2024-06-27 21:02:58,084 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 552 selfloop transitions, 117 changer transitions 0/672 dead transitions. [2024-06-27 21:02:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 672 transitions, 12661 flow [2024-06-27 21:02:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:02:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:02:58,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-27 21:02:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 21:02:58,088 INFO L175 Difference]: Start difference. First operand has 427 places, 631 transitions, 10287 flow. Second operand 10 states and 170 transitions. [2024-06-27 21:02:58,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 672 transitions, 12661 flow [2024-06-27 21:03:03,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 672 transitions, 12438 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 21:03:03,345 INFO L231 Difference]: Finished difference. Result has 430 places, 638 transitions, 10532 flow [2024-06-27 21:03:03,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10532, PETRI_PLACES=430, PETRI_TRANSITIONS=638} [2024-06-27 21:03:03,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 389 predicate places. [2024-06-27 21:03:03,347 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 638 transitions, 10532 flow [2024-06-27 21:03:03,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:03,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:03,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:03,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 21:03:03,349 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:03,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:03,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1893407693, now seen corresponding path program 6 times [2024-06-27 21:03:03,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:03,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902102306] [2024-06-27 21:03:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902102306] [2024-06-27 21:03:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902102306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:04,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283090906] [2024-06-27 21:03:04,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:04,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:04,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:04,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 638 transitions, 10532 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:04,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:04,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:06,122 INFO L124 PetriNetUnfolderBase]: 4994/7457 cut-off events. [2024-06-27 21:03:06,122 INFO L125 PetriNetUnfolderBase]: For 1707138/1707138 co-relation queries the response was YES. [2024-06-27 21:03:06,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83019 conditions, 7457 events. 4994/7457 cut-off events. For 1707138/1707138 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 41717 event pairs, 1411 based on Foata normal form. 12/7467 useless extension candidates. Maximal degree in co-relation 82822. Up to 7081 conditions per place. [2024-06-27 21:03:06,246 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 608 selfloop transitions, 71 changer transitions 0/682 dead transitions. [2024-06-27 21:03:06,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 682 transitions, 12935 flow [2024-06-27 21:03:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 21:03:06,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:03:06,247 INFO L175 Difference]: Start difference. First operand has 430 places, 638 transitions, 10532 flow. Second operand 9 states and 144 transitions. [2024-06-27 21:03:06,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 682 transitions, 12935 flow [2024-06-27 21:03:12,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 682 transitions, 12686 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 21:03:12,608 INFO L231 Difference]: Finished difference. Result has 434 places, 658 transitions, 10963 flow [2024-06-27 21:03:12,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10293, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10963, PETRI_PLACES=434, PETRI_TRANSITIONS=658} [2024-06-27 21:03:12,609 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-27 21:03:12,609 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 658 transitions, 10963 flow [2024-06-27 21:03:12,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:12,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:12,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:12,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 21:03:12,610 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:12,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:12,610 INFO L85 PathProgramCache]: Analyzing trace with hash -789372032, now seen corresponding path program 1 times [2024-06-27 21:03:12,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:12,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942251302] [2024-06-27 21:03:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:12,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942251302] [2024-06-27 21:03:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942251302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:13,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:13,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:13,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854090594] [2024-06-27 21:03:13,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:13,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:13,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:13,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-27 21:03:13,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 658 transitions, 10963 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:13,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:13,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-27 21:03:13,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:15,318 INFO L124 PetriNetUnfolderBase]: 5018/7569 cut-off events. [2024-06-27 21:03:15,318 INFO L125 PetriNetUnfolderBase]: For 1698003/1698065 co-relation queries the response was YES. [2024-06-27 21:03:15,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85010 conditions, 7569 events. 5018/7569 cut-off events. For 1698003/1698065 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 43393 event pairs, 841 based on Foata normal form. 51/7592 useless extension candidates. Maximal degree in co-relation 84810. Up to 6873 conditions per place. [2024-06-27 21:03:15,460 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 551 selfloop transitions, 122 changer transitions 0/770 dead transitions. [2024-06-27 21:03:15,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 770 transitions, 13945 flow [2024-06-27 21:03:15,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:03:15,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 21:03:15,462 INFO L175 Difference]: Start difference. First operand has 434 places, 658 transitions, 10963 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:03:15,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 770 transitions, 13945 flow [2024-06-27 21:03:21,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 770 transitions, 13670 flow, removed 127 selfloop flow, removed 3 redundant places. [2024-06-27 21:03:21,819 INFO L231 Difference]: Finished difference. Result has 443 places, 736 transitions, 12313 flow [2024-06-27 21:03:21,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10688, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12313, PETRI_PLACES=443, PETRI_TRANSITIONS=736} [2024-06-27 21:03:21,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2024-06-27 21:03:21,820 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 736 transitions, 12313 flow [2024-06-27 21:03:21,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:21,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:21,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:21,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 21:03:21,821 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:21,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:21,821 INFO L85 PathProgramCache]: Analyzing trace with hash 266673054, now seen corresponding path program 2 times [2024-06-27 21:03:21,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:21,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545347544] [2024-06-27 21:03:21,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:21,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:22,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545347544] [2024-06-27 21:03:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545347544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:22,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:22,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:22,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720456240] [2024-06-27 21:03:22,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:22,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:22,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:22,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:22,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:22,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:22,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 736 transitions, 12313 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:22,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:22,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:22,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:24,786 INFO L124 PetriNetUnfolderBase]: 5385/8022 cut-off events. [2024-06-27 21:03:24,786 INFO L125 PetriNetUnfolderBase]: For 1732114/1732118 co-relation queries the response was YES. [2024-06-27 21:03:24,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89633 conditions, 8022 events. 5385/8022 cut-off events. For 1732114/1732118 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 45241 event pairs, 1236 based on Foata normal form. 5/8025 useless extension candidates. Maximal degree in co-relation 89428. Up to 7758 conditions per place. [2024-06-27 21:03:24,932 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 700 selfloop transitions, 100 changer transitions 0/803 dead transitions. [2024-06-27 21:03:24,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 803 transitions, 14994 flow [2024-06-27 21:03:24,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 21:03:24,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2024-06-27 21:03:24,933 INFO L175 Difference]: Start difference. First operand has 443 places, 736 transitions, 12313 flow. Second operand 9 states and 149 transitions. [2024-06-27 21:03:24,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 803 transitions, 14994 flow [2024-06-27 21:03:31,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 803 transitions, 14931 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 21:03:31,568 INFO L231 Difference]: Finished difference. Result has 452 places, 772 transitions, 13308 flow [2024-06-27 21:03:31,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12274, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13308, PETRI_PLACES=452, PETRI_TRANSITIONS=772} [2024-06-27 21:03:31,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-27 21:03:31,569 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 772 transitions, 13308 flow [2024-06-27 21:03:31,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:31,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:31,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:31,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 21:03:31,570 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:31,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:31,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1503053184, now seen corresponding path program 3 times [2024-06-27 21:03:31,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:31,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804156168] [2024-06-27 21:03:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:31,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:32,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:32,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804156168] [2024-06-27 21:03:32,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804156168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:32,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:03:32,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608926397] [2024-06-27 21:03:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:32,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:03:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:03:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:03:32,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:32,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 772 transitions, 13308 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:32,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:32,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:32,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:34,399 INFO L124 PetriNetUnfolderBase]: 5402/8036 cut-off events. [2024-06-27 21:03:34,399 INFO L125 PetriNetUnfolderBase]: For 1763609/1763615 co-relation queries the response was YES. [2024-06-27 21:03:34,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90907 conditions, 8036 events. 5402/8036 cut-off events. For 1763609/1763615 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 45136 event pairs, 939 based on Foata normal form. 7/8041 useless extension candidates. Maximal degree in co-relation 90698. Up to 7820 conditions per place. [2024-06-27 21:03:34,551 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 710 selfloop transitions, 100 changer transitions 0/813 dead transitions. [2024-06-27 21:03:34,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 813 transitions, 15390 flow [2024-06-27 21:03:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:34,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:03:34,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 21:03:34,553 INFO L175 Difference]: Start difference. First operand has 452 places, 772 transitions, 13308 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:03:34,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 813 transitions, 15390 flow [2024-06-27 21:03:41,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 813 transitions, 15208 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:41,165 INFO L231 Difference]: Finished difference. Result has 459 places, 787 transitions, 13750 flow [2024-06-27 21:03:41,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13145, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13750, PETRI_PLACES=459, PETRI_TRANSITIONS=787} [2024-06-27 21:03:41,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-27 21:03:41,166 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 787 transitions, 13750 flow [2024-06-27 21:03:41,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:41,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:41,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:41,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 21:03:41,167 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:41,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 264975959, now seen corresponding path program 1 times [2024-06-27 21:03:41,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:41,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428330800] [2024-06-27 21:03:41,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:41,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:41,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:41,774 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 21:03:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:41,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428330800] [2024-06-27 21:03:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428330800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:41,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185411621] [2024-06-27 21:03:41,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:41,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:41,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:41,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:41,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 787 transitions, 13750 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:41,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:41,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:41,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:44,142 INFO L124 PetriNetUnfolderBase]: 5627/8377 cut-off events. [2024-06-27 21:03:44,142 INFO L125 PetriNetUnfolderBase]: For 1929961/1929965 co-relation queries the response was YES. [2024-06-27 21:03:44,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94810 conditions, 8377 events. 5627/8377 cut-off events. For 1929961/1929965 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 47412 event pairs, 1001 based on Foata normal form. 12/8387 useless extension candidates. Maximal degree in co-relation 94598. Up to 7760 conditions per place. [2024-06-27 21:03:44,297 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 736 selfloop transitions, 122 changer transitions 0/861 dead transitions. [2024-06-27 21:03:44,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 861 transitions, 16280 flow [2024-06-27 21:03:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:44,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 21:03:44,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-06-27 21:03:44,298 INFO L175 Difference]: Start difference. First operand has 459 places, 787 transitions, 13750 flow. Second operand 9 states and 157 transitions. [2024-06-27 21:03:44,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 861 transitions, 16280 flow [2024-06-27 21:03:51,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 861 transitions, 16095 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 21:03:51,641 INFO L231 Difference]: Finished difference. Result has 465 places, 812 transitions, 14078 flow [2024-06-27 21:03:51,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13565, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14078, PETRI_PLACES=465, PETRI_TRANSITIONS=812} [2024-06-27 21:03:51,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 424 predicate places. [2024-06-27 21:03:51,642 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 812 transitions, 14078 flow [2024-06-27 21:03:51,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:51,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:03:51,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:03:51,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 21:03:51,643 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:03:51,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:03:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1503060779, now seen corresponding path program 2 times [2024-06-27 21:03:51,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:03:51,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297928958] [2024-06-27 21:03:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:03:51,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:03:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:03:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:03:52,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:03:52,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297928958] [2024-06-27 21:03:52,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297928958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:03:52,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:03:52,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:03:52,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763086601] [2024-06-27 21:03:52,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:03:52,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:03:52,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:03:52,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:03:52,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:03:52,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:03:52,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 812 transitions, 14078 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:03:52,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:03:52,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:03:52,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:03:55,252 INFO L124 PetriNetUnfolderBase]: 5645/8407 cut-off events. [2024-06-27 21:03:55,253 INFO L125 PetriNetUnfolderBase]: For 1960146/1960152 co-relation queries the response was YES. [2024-06-27 21:03:55,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95251 conditions, 8407 events. 5645/8407 cut-off events. For 1960146/1960152 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 47598 event pairs, 966 based on Foata normal form. 18/8423 useless extension candidates. Maximal degree in co-relation 95036. Up to 7921 conditions per place. [2024-06-27 21:03:55,391 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 716 selfloop transitions, 131 changer transitions 0/850 dead transitions. [2024-06-27 21:03:55,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 850 transitions, 16082 flow [2024-06-27 21:03:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:03:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:03:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:03:55,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:03:55,393 INFO L175 Difference]: Start difference. First operand has 465 places, 812 transitions, 14078 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:03:55,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 850 transitions, 16082 flow [2024-06-27 21:04:01,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 850 transitions, 16045 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:01,333 INFO L231 Difference]: Finished difference. Result has 473 places, 814 transitions, 14402 flow [2024-06-27 21:04:01,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14043, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14402, PETRI_PLACES=473, PETRI_TRANSITIONS=814} [2024-06-27 21:04:01,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-27 21:04:01,334 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 814 transitions, 14402 flow [2024-06-27 21:04:01,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:01,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:01,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:01,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 21:04:01,335 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:01,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:01,335 INFO L85 PathProgramCache]: Analyzing trace with hash 272385269, now seen corresponding path program 3 times [2024-06-27 21:04:01,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:01,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615174752] [2024-06-27 21:04:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:01,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:02,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:02,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615174752] [2024-06-27 21:04:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615174752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:02,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:02,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:02,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791253121] [2024-06-27 21:04:02,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:02,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:02,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:02,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:02,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 814 transitions, 14402 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:02,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:02,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:02,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:05,377 INFO L124 PetriNetUnfolderBase]: 5627/8381 cut-off events. [2024-06-27 21:04:05,377 INFO L125 PetriNetUnfolderBase]: For 1906801/1906809 co-relation queries the response was YES. [2024-06-27 21:04:05,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94653 conditions, 8381 events. 5627/8381 cut-off events. For 1906801/1906809 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 47446 event pairs, 950 based on Foata normal form. 16/8395 useless extension candidates. Maximal degree in co-relation 94435. Up to 7841 conditions per place. [2024-06-27 21:04:05,526 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 726 selfloop transitions, 127 changer transitions 0/856 dead transitions. [2024-06-27 21:04:05,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 856 transitions, 16417 flow [2024-06-27 21:04:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-27 21:04:05,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-06-27 21:04:05,527 INFO L175 Difference]: Start difference. First operand has 473 places, 814 transitions, 14402 flow. Second operand 9 states and 152 transitions. [2024-06-27 21:04:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 856 transitions, 16417 flow [2024-06-27 21:04:12,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 856 transitions, 16179 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 21:04:12,342 INFO L231 Difference]: Finished difference. Result has 478 places, 816 transitions, 14460 flow [2024-06-27 21:04:12,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14164, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14460, PETRI_PLACES=478, PETRI_TRANSITIONS=816} [2024-06-27 21:04:12,342 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-27 21:04:12,342 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 816 transitions, 14460 flow [2024-06-27 21:04:12,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:12,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:12,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:12,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 21:04:12,353 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:12,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2019265147, now seen corresponding path program 4 times [2024-06-27 21:04:12,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:12,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840041772] [2024-06-27 21:04:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:12,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:12,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840041772] [2024-06-27 21:04:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840041772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:12,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:12,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:12,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437447223] [2024-06-27 21:04:12,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:12,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:12,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:13,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:13,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 816 transitions, 14460 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:13,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:13,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:13,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:16,373 INFO L124 PetriNetUnfolderBase]: 5774/8612 cut-off events. [2024-06-27 21:04:16,374 INFO L125 PetriNetUnfolderBase]: For 2001812/2001820 co-relation queries the response was YES. [2024-06-27 21:04:16,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97440 conditions, 8612 events. 5774/8612 cut-off events. For 2001812/2001820 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48973 event pairs, 914 based on Foata normal form. 16/8626 useless extension candidates. Maximal degree in co-relation 97220. Up to 7618 conditions per place. [2024-06-27 21:04:16,542 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 725 selfloop transitions, 137 changer transitions 0/865 dead transitions. [2024-06-27 21:04:16,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 865 transitions, 16829 flow [2024-06-27 21:04:16,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 21:04:16,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41944444444444445 [2024-06-27 21:04:16,544 INFO L175 Difference]: Start difference. First operand has 478 places, 816 transitions, 14460 flow. Second operand 9 states and 151 transitions. [2024-06-27 21:04:16,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 865 transitions, 16829 flow [2024-06-27 21:04:23,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 865 transitions, 16587 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:23,064 INFO L231 Difference]: Finished difference. Result has 484 places, 828 transitions, 14758 flow [2024-06-27 21:04:23,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14218, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=816, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14758, PETRI_PLACES=484, PETRI_TRANSITIONS=828} [2024-06-27 21:04:23,064 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-27 21:04:23,064 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 828 transitions, 14758 flow [2024-06-27 21:04:23,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:23,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:23,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:23,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 21:04:23,065 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:23,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -158097732, now seen corresponding path program 4 times [2024-06-27 21:04:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:23,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912081941] [2024-06-27 21:04:23,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:23,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:23,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:23,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912081941] [2024-06-27 21:04:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912081941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:23,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382675191] [2024-06-27 21:04:23,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:23,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:23,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:23,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:23,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:23,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:23,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 828 transitions, 14758 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:23,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:23,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:23,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:26,798 INFO L124 PetriNetUnfolderBase]: 5771/8617 cut-off events. [2024-06-27 21:04:26,798 INFO L125 PetriNetUnfolderBase]: For 1977207/1977211 co-relation queries the response was YES. [2024-06-27 21:04:26,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98162 conditions, 8617 events. 5771/8617 cut-off events. For 1977207/1977211 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49370 event pairs, 1379 based on Foata normal form. 5/8620 useless extension candidates. Maximal degree in co-relation 97938. Up to 8402 conditions per place. [2024-06-27 21:04:26,980 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 762 selfloop transitions, 88 changer transitions 0/853 dead transitions. [2024-06-27 21:04:26,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 853 transitions, 16564 flow [2024-06-27 21:04:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 21:04:26,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972222222222222 [2024-06-27 21:04:26,982 INFO L175 Difference]: Start difference. First operand has 484 places, 828 transitions, 14758 flow. Second operand 9 states and 143 transitions. [2024-06-27 21:04:26,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 853 transitions, 16564 flow [2024-06-27 21:04:34,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 853 transitions, 16394 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 21:04:34,652 INFO L231 Difference]: Finished difference. Result has 489 places, 828 transitions, 14779 flow [2024-06-27 21:04:34,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14588, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14779, PETRI_PLACES=489, PETRI_TRANSITIONS=828} [2024-06-27 21:04:34,653 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-27 21:04:34,653 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 828 transitions, 14779 flow [2024-06-27 21:04:34,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:34,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:34,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:34,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 21:04:34,653 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:34,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:34,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1897118131, now seen corresponding path program 1 times [2024-06-27 21:04:34,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:34,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899262689] [2024-06-27 21:04:34,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:34,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:35,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899262689] [2024-06-27 21:04:35,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899262689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:35,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683726336] [2024-06-27 21:04:35,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:35,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:35,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:35,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:35,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 828 transitions, 14779 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:35,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:35,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:35,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:38,405 INFO L124 PetriNetUnfolderBase]: 5814/8675 cut-off events. [2024-06-27 21:04:38,405 INFO L125 PetriNetUnfolderBase]: For 2023285/2023330 co-relation queries the response was YES. [2024-06-27 21:04:38,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99002 conditions, 8675 events. 5814/8675 cut-off events. For 2023285/2023330 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49576 event pairs, 1105 based on Foata normal form. 32/8693 useless extension candidates. Maximal degree in co-relation 98777. Up to 8420 conditions per place. [2024-06-27 21:04:38,600 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 779 selfloop transitions, 98 changer transitions 0/880 dead transitions. [2024-06-27 21:04:38,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 880 transitions, 17321 flow [2024-06-27 21:04:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:04:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:04:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-27 21:04:38,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2024-06-27 21:04:38,601 INFO L175 Difference]: Start difference. First operand has 489 places, 828 transitions, 14779 flow. Second operand 10 states and 158 transitions. [2024-06-27 21:04:38,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 880 transitions, 17321 flow [2024-06-27 21:04:47,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 880 transitions, 17160 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 21:04:47,055 INFO L231 Difference]: Finished difference. Result has 496 places, 848 transitions, 15238 flow [2024-06-27 21:04:47,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14620, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15238, PETRI_PLACES=496, PETRI_TRANSITIONS=848} [2024-06-27 21:04:47,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 455 predicate places. [2024-06-27 21:04:47,056 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 848 transitions, 15238 flow [2024-06-27 21:04:47,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:47,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:47,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:47,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 21:04:47,056 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:47,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:47,056 INFO L85 PathProgramCache]: Analyzing trace with hash 419788573, now seen corresponding path program 2 times [2024-06-27 21:04:47,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:47,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142469210] [2024-06-27 21:04:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:47,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:47,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142469210] [2024-06-27 21:04:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142469210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:47,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:47,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:04:47,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567884940] [2024-06-27 21:04:47,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:47,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:04:47,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:04:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:04:47,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:47,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 848 transitions, 15238 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:47,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:47,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:47,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:04:50,573 INFO L124 PetriNetUnfolderBase]: 5843/8717 cut-off events. [2024-06-27 21:04:50,573 INFO L125 PetriNetUnfolderBase]: For 2069387/2069432 co-relation queries the response was YES. [2024-06-27 21:04:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101325 conditions, 8717 events. 5843/8717 cut-off events. For 2069387/2069432 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 49856 event pairs, 1107 based on Foata normal form. 32/8735 useless extension candidates. Maximal degree in co-relation 101096. Up to 8400 conditions per place. [2024-06-27 21:04:50,881 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 766 selfloop transitions, 119 changer transitions 0/888 dead transitions. [2024-06-27 21:04:50,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 888 transitions, 17670 flow [2024-06-27 21:04:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:04:50,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:04:50,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 21:04:50,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4083333333333333 [2024-06-27 21:04:50,883 INFO L175 Difference]: Start difference. First operand has 496 places, 848 transitions, 15238 flow. Second operand 9 states and 147 transitions. [2024-06-27 21:04:50,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 888 transitions, 17670 flow [2024-06-27 21:04:58,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 888 transitions, 17479 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-27 21:04:58,827 INFO L231 Difference]: Finished difference. Result has 504 places, 859 transitions, 15604 flow [2024-06-27 21:04:58,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15073, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15604, PETRI_PLACES=504, PETRI_TRANSITIONS=859} [2024-06-27 21:04:58,841 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-27 21:04:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 859 transitions, 15604 flow [2024-06-27 21:04:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:04:58,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:04:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 21:04:58,841 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:04:58,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:04:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1068917329, now seen corresponding path program 1 times [2024-06-27 21:04:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:04:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323794597] [2024-06-27 21:04:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:04:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:04:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:04:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:04:59,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:04:59,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323794597] [2024-06-27 21:04:59,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323794597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:04:59,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:04:59,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:04:59,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899415999] [2024-06-27 21:04:59,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:04:59,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:04:59,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:04:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:04:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:04:59,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:04:59,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 859 transitions, 15604 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:04:59,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:04:59,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:04:59,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:02,473 INFO L124 PetriNetUnfolderBase]: 5895/8786 cut-off events. [2024-06-27 21:05:02,474 INFO L125 PetriNetUnfolderBase]: For 2151594/2151604 co-relation queries the response was YES. [2024-06-27 21:05:02,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103255 conditions, 8786 events. 5895/8786 cut-off events. For 2151594/2151604 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50297 event pairs, 1109 based on Foata normal form. 14/8798 useless extension candidates. Maximal degree in co-relation 103023. Up to 8289 conditions per place. [2024-06-27 21:05:02,634 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 738 selfloop transitions, 163 changer transitions 0/904 dead transitions. [2024-06-27 21:05:02,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 904 transitions, 18064 flow [2024-06-27 21:05:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:02,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-27 21:05:02,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4275 [2024-06-27 21:05:02,636 INFO L175 Difference]: Start difference. First operand has 504 places, 859 transitions, 15604 flow. Second operand 10 states and 171 transitions. [2024-06-27 21:05:02,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 904 transitions, 18064 flow [2024-06-27 21:05:10,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 904 transitions, 17847 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-27 21:05:10,909 INFO L231 Difference]: Finished difference. Result has 511 places, 868 transitions, 15959 flow [2024-06-27 21:05:10,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15387, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15959, PETRI_PLACES=511, PETRI_TRANSITIONS=868} [2024-06-27 21:05:10,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 470 predicate places. [2024-06-27 21:05:10,910 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 868 transitions, 15959 flow [2024-06-27 21:05:10,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:10,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:10,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 21:05:10,911 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:10,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2007047817, now seen corresponding path program 3 times [2024-06-27 21:05:10,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746104381] [2024-06-27 21:05:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:10,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:11,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:11,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746104381] [2024-06-27 21:05:11,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746104381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:11,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:11,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:11,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463205084] [2024-06-27 21:05:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:11,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:11,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:11,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:11,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 868 transitions, 15959 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:11,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:11,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:11,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:14,706 INFO L124 PetriNetUnfolderBase]: 5905/8800 cut-off events. [2024-06-27 21:05:14,707 INFO L125 PetriNetUnfolderBase]: For 2172803/2172813 co-relation queries the response was YES. [2024-06-27 21:05:14,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105308 conditions, 8800 events. 5905/8800 cut-off events. For 2172803/2172813 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 50402 event pairs, 1080 based on Foata normal form. 12/8810 useless extension candidates. Maximal degree in co-relation 105073. Up to 8545 conditions per place. [2024-06-27 21:05:14,870 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 791 selfloop transitions, 109 changer transitions 0/903 dead transitions. [2024-06-27 21:05:14,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 903 transitions, 17998 flow [2024-06-27 21:05:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 21:05:14,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975 [2024-06-27 21:05:14,872 INFO L175 Difference]: Start difference. First operand has 511 places, 868 transitions, 15959 flow. Second operand 10 states and 159 transitions. [2024-06-27 21:05:14,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 903 transitions, 17998 flow [2024-06-27 21:05:23,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 903 transitions, 17819 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 21:05:23,860 INFO L231 Difference]: Finished difference. Result has 518 places, 873 transitions, 16124 flow [2024-06-27 21:05:23,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15780, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16124, PETRI_PLACES=518, PETRI_TRANSITIONS=873} [2024-06-27 21:05:23,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-27 21:05:23,861 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 873 transitions, 16124 flow [2024-06-27 21:05:23,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:23,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:23,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:23,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 21:05:23,862 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:23,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:23,862 INFO L85 PathProgramCache]: Analyzing trace with hash -803615917, now seen corresponding path program 2 times [2024-06-27 21:05:23,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:23,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80137350] [2024-06-27 21:05:23,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:23,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:24,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80137350] [2024-06-27 21:05:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80137350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:24,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:24,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485389906] [2024-06-27 21:05:24,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:24,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:24,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:24,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:24,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:24,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:24,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 873 transitions, 16124 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:24,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:24,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:24,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:27,800 INFO L124 PetriNetUnfolderBase]: 5925/8828 cut-off events. [2024-06-27 21:05:27,801 INFO L125 PetriNetUnfolderBase]: For 2225119/2225129 co-relation queries the response was YES. [2024-06-27 21:05:27,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105804 conditions, 8828 events. 5925/8828 cut-off events. For 2225119/2225129 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50522 event pairs, 1138 based on Foata normal form. 14/8840 useless extension candidates. Maximal degree in co-relation 105567. Up to 8410 conditions per place. [2024-06-27 21:05:27,971 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 761 selfloop transitions, 141 changer transitions 0/905 dead transitions. [2024-06-27 21:05:27,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 905 transitions, 18158 flow [2024-06-27 21:05:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 21:05:27,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:05:27,972 INFO L175 Difference]: Start difference. First operand has 518 places, 873 transitions, 16124 flow. Second operand 10 states and 160 transitions. [2024-06-27 21:05:27,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 905 transitions, 18158 flow [2024-06-27 21:05:37,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 905 transitions, 17911 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 21:05:37,870 INFO L231 Difference]: Finished difference. Result has 522 places, 876 transitions, 16245 flow [2024-06-27 21:05:37,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15877, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16245, PETRI_PLACES=522, PETRI_TRANSITIONS=876} [2024-06-27 21:05:37,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-27 21:05:37,871 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 876 transitions, 16245 flow [2024-06-27 21:05:37,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:37,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:37,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 21:05:37,872 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:37,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:37,872 INFO L85 PathProgramCache]: Analyzing trace with hash -810974263, now seen corresponding path program 4 times [2024-06-27 21:05:37,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:37,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130795395] [2024-06-27 21:05:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:37,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130795395] [2024-06-27 21:05:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130795395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263407042] [2024-06-27 21:05:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:38,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:38,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 876 transitions, 16245 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:38,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:38,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:38,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:41,491 INFO L124 PetriNetUnfolderBase]: 5919/8820 cut-off events. [2024-06-27 21:05:41,491 INFO L125 PetriNetUnfolderBase]: For 2222504/2222514 co-relation queries the response was YES. [2024-06-27 21:05:41,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105922 conditions, 8820 events. 5919/8820 cut-off events. For 2222504/2222514 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50479 event pairs, 1109 based on Foata normal form. 12/8830 useless extension candidates. Maximal degree in co-relation 105684. Up to 8610 conditions per place. [2024-06-27 21:05:41,673 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 808 selfloop transitions, 92 changer transitions 0/903 dead transitions. [2024-06-27 21:05:41,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 903 transitions, 18165 flow [2024-06-27 21:05:41,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-27 21:05:41,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2024-06-27 21:05:41,674 INFO L175 Difference]: Start difference. First operand has 522 places, 876 transitions, 16245 flow. Second operand 10 states and 153 transitions. [2024-06-27 21:05:41,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 903 transitions, 18165 flow [2024-06-27 21:05:51,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 903 transitions, 17755 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 21:05:51,364 INFO L231 Difference]: Finished difference. Result has 524 places, 876 transitions, 16028 flow [2024-06-27 21:05:51,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15835, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16028, PETRI_PLACES=524, PETRI_TRANSITIONS=876} [2024-06-27 21:05:51,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-27 21:05:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 876 transitions, 16028 flow [2024-06-27 21:05:51,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:51,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:05:51,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:05:51,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 21:05:51,366 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:05:51,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:05:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1846113523, now seen corresponding path program 3 times [2024-06-27 21:05:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:05:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849454080] [2024-06-27 21:05:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:05:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:05:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:05:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:05:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:05:51,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849454080] [2024-06-27 21:05:51,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849454080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:05:51,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:05:51,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:05:51,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474535079] [2024-06-27 21:05:51,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:05:51,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:05:51,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:05:51,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:05:51,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:05:52,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:05:52,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 876 transitions, 16028 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:05:52,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:05:52,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:05:52,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:05:55,238 INFO L124 PetriNetUnfolderBase]: 5907/8804 cut-off events. [2024-06-27 21:05:55,238 INFO L125 PetriNetUnfolderBase]: For 2238198/2238208 co-relation queries the response was YES. [2024-06-27 21:05:55,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105025 conditions, 8804 events. 5907/8804 cut-off events. For 2238198/2238208 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 50388 event pairs, 1132 based on Foata normal form. 14/8816 useless extension candidates. Maximal degree in co-relation 104786. Up to 8364 conditions per place. [2024-06-27 21:05:55,408 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 757 selfloop transitions, 148 changer transitions 0/908 dead transitions. [2024-06-27 21:05:55,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 908 transitions, 18025 flow [2024-06-27 21:05:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:05:55,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:05:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 21:05:55,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2024-06-27 21:05:55,409 INFO L175 Difference]: Start difference. First operand has 524 places, 876 transitions, 16028 flow. Second operand 10 states and 164 transitions. [2024-06-27 21:05:55,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 908 transitions, 18025 flow [2024-06-27 21:06:04,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 908 transitions, 17846 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:04,741 INFO L231 Difference]: Finished difference. Result has 528 places, 876 transitions, 16152 flow [2024-06-27 21:06:04,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15849, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16152, PETRI_PLACES=528, PETRI_TRANSITIONS=876} [2024-06-27 21:06:04,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 487 predicate places. [2024-06-27 21:06:04,742 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 876 transitions, 16152 flow [2024-06-27 21:06:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:04,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:04,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:04,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 21:06:04,743 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:04,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1201443048, now seen corresponding path program 5 times [2024-06-27 21:06:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:04,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075342591] [2024-06-27 21:06:04,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:04,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075342591] [2024-06-27 21:06:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075342591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:05,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324539215] [2024-06-27 21:06:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:05,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:05,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:05,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 876 transitions, 16152 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:05,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:05,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:08,692 INFO L124 PetriNetUnfolderBase]: 5996/8926 cut-off events. [2024-06-27 21:06:08,693 INFO L125 PetriNetUnfolderBase]: For 2233399/2233409 co-relation queries the response was YES. [2024-06-27 21:06:08,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107057 conditions, 8926 events. 5996/8926 cut-off events. For 2233399/2233409 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 51084 event pairs, 1037 based on Foata normal form. 11/8935 useless extension candidates. Maximal degree in co-relation 106817. Up to 8597 conditions per place. [2024-06-27 21:06:08,866 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 805 selfloop transitions, 145 changer transitions 0/953 dead transitions. [2024-06-27 21:06:08,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 953 transitions, 19763 flow [2024-06-27 21:06:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-27 21:06:08,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 21:06:08,867 INFO L175 Difference]: Start difference. First operand has 528 places, 876 transitions, 16152 flow. Second operand 9 states and 150 transitions. [2024-06-27 21:06:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 953 transitions, 19763 flow [2024-06-27 21:06:19,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 953 transitions, 19379 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-27 21:06:19,591 INFO L231 Difference]: Finished difference. Result has 530 places, 918 transitions, 17404 flow [2024-06-27 21:06:19,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15813, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=876, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17404, PETRI_PLACES=530, PETRI_TRANSITIONS=918} [2024-06-27 21:06:19,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 489 predicate places. [2024-06-27 21:06:19,591 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 918 transitions, 17404 flow [2024-06-27 21:06:19,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:19,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:19,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:19,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 21:06:19,592 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:19,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1257052382, now seen corresponding path program 6 times [2024-06-27 21:06:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:19,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362449122] [2024-06-27 21:06:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362449122] [2024-06-27 21:06:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362449122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:20,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:20,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434933653] [2024-06-27 21:06:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:20,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:20,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:20,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 918 transitions, 17404 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:20,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:20,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:20,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:23,810 INFO L124 PetriNetUnfolderBase]: 6001/8936 cut-off events. [2024-06-27 21:06:23,810 INFO L125 PetriNetUnfolderBase]: For 2271801/2271811 co-relation queries the response was YES. [2024-06-27 21:06:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107471 conditions, 8936 events. 6001/8936 cut-off events. For 2271801/2271811 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 51174 event pairs, 1053 based on Foata normal form. 11/8945 useless extension candidates. Maximal degree in co-relation 107228. Up to 8700 conditions per place. [2024-06-27 21:06:23,996 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 839 selfloop transitions, 108 changer transitions 0/950 dead transitions. [2024-06-27 21:06:23,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 950 transitions, 19614 flow [2024-06-27 21:06:23,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 21:06:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 21:06:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 21:06:23,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 21:06:23,997 INFO L175 Difference]: Start difference. First operand has 530 places, 918 transitions, 17404 flow. Second operand 9 states and 145 transitions. [2024-06-27 21:06:23,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 950 transitions, 19614 flow [2024-06-27 21:06:35,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 950 transitions, 19409 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 21:06:35,049 INFO L231 Difference]: Finished difference. Result has 536 places, 924 transitions, 17646 flow [2024-06-27 21:06:35,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17208, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17646, PETRI_PLACES=536, PETRI_TRANSITIONS=924} [2024-06-27 21:06:35,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2024-06-27 21:06:35,050 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 924 transitions, 17646 flow [2024-06-27 21:06:35,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:35,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:35,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:35,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 21:06:35,051 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:35,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:35,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1338179227, now seen corresponding path program 5 times [2024-06-27 21:06:35,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:35,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481334339] [2024-06-27 21:06:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:35,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:35,552 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 21:06:35,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:35,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481334339] [2024-06-27 21:06:35,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481334339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:35,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:35,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 21:06:35,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262560990] [2024-06-27 21:06:35,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:35,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 21:06:35,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:35,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 21:06:35,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 21:06:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 924 transitions, 17646 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:35,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:38,735 INFO L124 PetriNetUnfolderBase]: 6043/9000 cut-off events. [2024-06-27 21:06:38,735 INFO L125 PetriNetUnfolderBase]: For 2355375/2355396 co-relation queries the response was YES. [2024-06-27 21:06:39,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108934 conditions, 9000 events. 6043/9000 cut-off events. For 2355375/2355396 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 51614 event pairs, 1130 based on Foata normal form. 16/9002 useless extension candidates. Maximal degree in co-relation 108689. Up to 8432 conditions per place. [2024-06-27 21:06:39,075 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 767 selfloop transitions, 189 changer transitions 0/959 dead transitions. [2024-06-27 21:06:39,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 959 transitions, 20187 flow [2024-06-27 21:06:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 21:06:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 21:06:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 21:06:39,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2024-06-27 21:06:39,076 INFO L175 Difference]: Start difference. First operand has 536 places, 924 transitions, 17646 flow. Second operand 8 states and 131 transitions. [2024-06-27 21:06:39,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 959 transitions, 20187 flow [2024-06-27 21:06:48,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 959 transitions, 19981 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 21:06:48,809 INFO L231 Difference]: Finished difference. Result has 539 places, 932 transitions, 18100 flow [2024-06-27 21:06:48,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=17440, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18100, PETRI_PLACES=539, PETRI_TRANSITIONS=932} [2024-06-27 21:06:48,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 498 predicate places. [2024-06-27 21:06:48,810 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 932 transitions, 18100 flow [2024-06-27 21:06:48,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:48,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 21:06:48,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 21:06:48,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 21:06:48,811 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 21:06:48,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 21:06:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash -2018543377, now seen corresponding path program 6 times [2024-06-27 21:06:48,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 21:06:48,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150267219] [2024-06-27 21:06:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 21:06:48,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 21:06:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 21:06:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 21:06:49,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 21:06:49,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150267219] [2024-06-27 21:06:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150267219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 21:06:49,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 21:06:49,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 21:06:49,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938425189] [2024-06-27 21:06:49,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 21:06:49,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 21:06:49,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 21:06:49,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 21:06:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 21:06:49,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 21:06:49,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 932 transitions, 18100 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 21:06:49,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 21:06:49,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 21:06:49,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 21:06:52,768 INFO L124 PetriNetUnfolderBase]: 6063/9022 cut-off events. [2024-06-27 21:06:52,768 INFO L125 PetriNetUnfolderBase]: For 2393116/2393124 co-relation queries the response was YES. [2024-06-27 21:06:52,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110075 conditions, 9022 events. 6063/9022 cut-off events. For 2393116/2393124 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 51691 event pairs, 1029 based on Foata normal form. 10/9030 useless extension candidates. Maximal degree in co-relation 109828. Up to 8710 conditions per place. [2024-06-27 21:06:52,942 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 840 selfloop transitions, 131 changer transitions 0/974 dead transitions. [2024-06-27 21:06:52,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 974 transitions, 20400 flow [2024-06-27 21:06:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 21:06:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 21:06:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-27 21:06:52,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 21:06:52,944 INFO L175 Difference]: Start difference. First operand has 539 places, 932 transitions, 18100 flow. Second operand 10 states and 160 transitions. [2024-06-27 21:06:52,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 974 transitions, 20400 flow