./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix042.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix042.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:30:11,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:30:11,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:30:11,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:30:11,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:30:11,670 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:30:11,671 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:30:11,671 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:30:11,672 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:30:11,674 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:30:11,675 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:30:11,675 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:30:11,676 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:30:11,677 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:30:11,677 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:30:11,677 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:30:11,677 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:30:11,677 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:30:11,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:30:11,678 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:30:11,678 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:30:11,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:30:11,679 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:30:11,679 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:30:11,679 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:30:11,679 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:30:11,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:30:11,680 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:30:11,680 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:30:11,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:30:11,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:30:11,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:30:11,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:30:11,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:30:11,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:30:11,682 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:30:11,682 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:30:11,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:30:11,682 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:30:11,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:30:11,683 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:30:11,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:30:11,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:30:11,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:30:11,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:30:11,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:30:11,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:30:11,911 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:30:11,911 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:30:11,912 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-27 20:30:12,845 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:30:13,069 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:30:13,069 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix042.oepc.i [2024-06-27 20:30:13,082 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6703b7db/d2e29020763146939311807f7f1830fd/FLAGddd10dce0 [2024-06-27 20:30:13,092 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6703b7db/d2e29020763146939311807f7f1830fd [2024-06-27 20:30:13,094 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:30:13,097 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:30:13,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix042.oepc.yml/witness.yml [2024-06-27 20:30:13,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:30:13,238 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:30:13,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:30:13,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:30:13,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:30:13,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:30:13" (1/2) ... [2024-06-27 20:30:13,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f81889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:30:13, skipping insertion in model container [2024-06-27 20:30:13,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:30:13" (1/2) ... [2024-06-27 20:30:13,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7ff9dc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:30:13, skipping insertion in model container [2024-06-27 20:30:13,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:13" (2/2) ... [2024-06-27 20:30:13,247 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f81889 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:13, skipping insertion in model container [2024-06-27 20:30:13,247 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:13" (2/2) ... [2024-06-27 20:30:13,247 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:30:13,317 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:30:13,318 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 20:30:13,319 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 20:30:13,319 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || a$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (x == 0 || x == 1)) [2024-06-27 20:30:13,319 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:30:13,319 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-27 20:30:13,361 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:30:13,652 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:30:13,662 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:30:13,792 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:30:13,835 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:30:13,835 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:30:13 WrapperNode [2024-06-27 20:30:13,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:30:13,836 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:30:13,836 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:30:13,836 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:30:13,843 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,871 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,906 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-27 20:30:13,907 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:30:13,908 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:30:13,908 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:30:13,908 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:30:13,917 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,917 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,931 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,958 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 20:30:13,958 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,959 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 08:30:13" (1/1) ... [2024-06-27 20:30:13,981 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 08:30:13" (1/1) ... [2024-06-27 20:30:14,005 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 08:30:13" (1/1) ... [2024-06-27 20:30:14,007 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 08:30:13" (1/1) ... [2024-06-27 20:30:14,016 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 08:30:13" (1/1) ... [2024-06-27 20:30:14,018 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:30:14,024 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:30:14,025 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:30:14,025 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:30:14,025 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 08:30:13" (1/1) ... [2024-06-27 20:30:14,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:30:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:30:14,052 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 20:30:14,054 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 20:30:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:30:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:30:14,077 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:30:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:30:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:30:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:30:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:30:14,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:30:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:30:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:30:14,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:30:14,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:30:14,079 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 20:30:14,198 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:30:14,200 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:30:14,490 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:30:14,491 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:30:14,633 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:30:14,634 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:30:14,634 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:30:14 BoogieIcfgContainer [2024-06-27 20:30:14,634 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:30:14,637 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:30:14,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:30:14,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:30:14,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:30:13" (1/4) ... [2024-06-27 20:30:14,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0dc74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:30:14, skipping insertion in model container [2024-06-27 20:30:14,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:30:13" (2/4) ... [2024-06-27 20:30:14,641 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0dc74c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:30:14, skipping insertion in model container [2024-06-27 20:30:14,641 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 08:30:13" (3/4) ... [2024-06-27 20:30:14,642 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b0dc74c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:30:14, skipping insertion in model container [2024-06-27 20:30:14,642 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:30:14" (4/4) ... [2024-06-27 20:30:14,643 INFO L112 eAbstractionObserver]: Analyzing ICFG mix042.oepc.i [2024-06-27 20:30:14,656 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:30:14,656 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:30:14,656 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:30:14,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:30:14,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:30:14,755 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:30:14,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:30:14,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:30:14,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:30:14,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:30:14,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:30:14,771 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;@3ed2be28, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:30:14,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:30:14,774 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:30:14,774 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:30:14,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:30:14,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:14,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:30:14,776 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 20:30:14,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:14,780 INFO L85 PathProgramCache]: Analyzing trace with hash 377005303, now seen corresponding path program 1 times [2024-06-27 20:30:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614631799] [2024-06-27 20:30:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614631799] [2024-06-27 20:30:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614631799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:15,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:15,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:30:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050148061] [2024-06-27 20:30:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:30:15,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:15,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:30:15,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:30:15,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:30:15,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:15,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:15,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:30:15,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:15,964 INFO L124 PetriNetUnfolderBase]: 1566/2396 cut-off events. [2024-06-27 20:30:15,965 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-27 20:30:15,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4807 conditions, 2396 events. 1566/2396 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11486 event pairs, 1097 based on Foata normal form. 1/2328 useless extension candidates. Maximal degree in co-relation 4795. Up to 2326 conditions per place. [2024-06-27 20:30:15,979 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:30:15,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 175 flow [2024-06-27 20:30:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:30:15,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:30:15,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-06-27 20:30:15,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 20:30:15,989 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 76 transitions. [2024-06-27 20:30:15,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 175 flow [2024-06-27 20:30:15,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:15,993 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:30:15,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:30:15,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:30:15,997 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:30:15,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:15,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:15,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:15,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:30:15,997 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 20:30:15,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:15,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958000, now seen corresponding path program 1 times [2024-06-27 20:30:15,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:15,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127777908] [2024-06-27 20:30:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:15,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:16,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:16,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127777908] [2024-06-27 20:30:16,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127777908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:16,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:16,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:30:16,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847773413] [2024-06-27 20:30:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:16,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:30:16,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:16,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:30:16,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:30:16,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:30:16,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:16,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:16,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:30:16,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:16,942 INFO L124 PetriNetUnfolderBase]: 1560/2387 cut-off events. [2024-06-27 20:30:16,943 INFO L125 PetriNetUnfolderBase]: For 448/448 co-relation queries the response was YES. [2024-06-27 20:30:16,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5403 conditions, 2387 events. 1560/2387 cut-off events. For 448/448 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11430 event pairs, 930 based on Foata normal form. 3/2354 useless extension candidates. Maximal degree in co-relation 5391. Up to 2302 conditions per place. [2024-06-27 20:30:16,956 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:30:16,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 242 flow [2024-06-27 20:30:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:30:16,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:30:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-27 20:30:16,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 20:30:16,960 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 98 transitions. [2024-06-27 20:30:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 242 flow [2024-06-27 20:30:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:30:16,964 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:30:16,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:30:16,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:30:16,965 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:30:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:16,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:16,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:16,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:30:16,968 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 20:30:16,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:16,975 INFO L85 PathProgramCache]: Analyzing trace with hash 900820239, now seen corresponding path program 1 times [2024-06-27 20:30:16,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:16,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978356322] [2024-06-27 20:30:16,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:16,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:17,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978356322] [2024-06-27 20:30:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978356322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:17,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:30:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379405103] [2024-06-27 20:30:17,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:17,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:30:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:30:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:30:17,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:30:17,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:17,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:17,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:30:17,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:18,177 INFO L124 PetriNetUnfolderBase]: 1893/2870 cut-off events. [2024-06-27 20:30:18,177 INFO L125 PetriNetUnfolderBase]: For 1453/1453 co-relation queries the response was YES. [2024-06-27 20:30:18,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7157 conditions, 2870 events. 1893/2870 cut-off events. For 1453/1453 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13632 event pairs, 878 based on Foata normal form. 3/2830 useless extension candidates. Maximal degree in co-relation 7143. Up to 2753 conditions per place. [2024-06-27 20:30:18,191 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 13 changer transitions 0/73 dead transitions. [2024-06-27 20:30:18,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 73 transitions, 376 flow [2024-06-27 20:30:18,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:18,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-27 20:30:18,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-27 20:30:18,193 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 137 transitions. [2024-06-27 20:30:18,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 73 transitions, 376 flow [2024-06-27 20:30:18,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 356 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 20:30:18,196 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-27 20:30:18,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 20:30:18,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:30:18,197 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-27 20:30:18,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:18,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:18,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:18,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:30:18,198 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 20:30:18,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:18,198 INFO L85 PathProgramCache]: Analyzing trace with hash -420998953, now seen corresponding path program 1 times [2024-06-27 20:30:18,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:18,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319797557] [2024-06-27 20:30:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:18,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:19,142 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 20:30:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319797557] [2024-06-27 20:30:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319797557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:19,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972694901] [2024-06-27 20:30:19,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:19,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:19,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:19,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:19,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:19,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:30:19,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:19,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:19,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:30:19,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:19,610 INFO L124 PetriNetUnfolderBase]: 1884/2855 cut-off events. [2024-06-27 20:30:19,610 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2024-06-27 20:30:19,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7926 conditions, 2855 events. 1884/2855 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13519 event pairs, 690 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 7910. Up to 2708 conditions per place. [2024-06-27 20:30:19,625 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 15 changer transitions 0/79 dead transitions. [2024-06-27 20:30:19,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 436 flow [2024-06-27 20:30:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-27 20:30:19,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-27 20:30:19,627 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 7 states and 154 transitions. [2024-06-27 20:30:19,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 436 flow [2024-06-27 20:30:19,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 79 transitions, 408 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:19,630 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 217 flow [2024-06-27 20:30:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=217, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-27 20:30:19,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-27 20:30:19,631 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 217 flow [2024-06-27 20:30:19,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:19,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:19,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:30:19,632 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 20:30:19,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:19,632 INFO L85 PathProgramCache]: Analyzing trace with hash -856809485, now seen corresponding path program 1 times [2024-06-27 20:30:19,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:19,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763338576] [2024-06-27 20:30:19,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:19,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:20,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:20,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763338576] [2024-06-27 20:30:20,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763338576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:20,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:20,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:30:20,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207821083] [2024-06-27 20:30:20,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:30:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:20,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:30:20,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:30:20,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:20,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 217 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 20:30:20,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:20,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:20,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:20,566 INFO L124 PetriNetUnfolderBase]: 1879/2860 cut-off events. [2024-06-27 20:30:20,566 INFO L125 PetriNetUnfolderBase]: For 4336/4336 co-relation queries the response was YES. [2024-06-27 20:30:20,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8416 conditions, 2860 events. 1879/2860 cut-off events. For 4336/4336 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13588 event pairs, 812 based on Foata normal form. 2/2825 useless extension candidates. Maximal degree in co-relation 8398. Up to 2767 conditions per place. [2024-06-27 20:30:20,579 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-27 20:30:20,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 373 flow [2024-06-27 20:30:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:30:20,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:30:20,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 20:30:20,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 20:30:20,580 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 217 flow. Second operand 5 states and 92 transitions. [2024-06-27 20:30:20,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 373 flow [2024-06-27 20:30:20,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 334 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:20,584 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-27 20:30:20,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-06-27 20:30:20,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 11 predicate places. [2024-06-27 20:30:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-27 20:30:20,585 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 20:30:20,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:20,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:20,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:30:20,585 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 20:30:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash -819888251, now seen corresponding path program 1 times [2024-06-27 20:30:20,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:20,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653316703] [2024-06-27 20:30:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:20,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653316703] [2024-06-27 20:30:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653316703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:21,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:21,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:21,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919367015] [2024-06-27 20:30:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:21,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:21,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:21,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:21,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:21,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:21,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:21,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:21,692 INFO L124 PetriNetUnfolderBase]: 1883/2867 cut-off events. [2024-06-27 20:30:21,693 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-27 20:30:21,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8976 conditions, 2867 events. 1883/2867 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13569 event pairs, 763 based on Foata normal form. 6/2872 useless extension candidates. Maximal degree in co-relation 8956. Up to 2725 conditions per place. [2024-06-27 20:30:21,713 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2024-06-27 20:30:21,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 494 flow [2024-06-27 20:30:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:30:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:30:21,714 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:30:21,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 494 flow [2024-06-27 20:30:21,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 472 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:21,719 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 327 flow [2024-06-27 20:30:21,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2024-06-27 20:30:21,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:30:21,721 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 327 flow [2024-06-27 20:30:21,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:21,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:21,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:21,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:30:21,722 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 20:30:21,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:21,722 INFO L85 PathProgramCache]: Analyzing trace with hash 347547538, now seen corresponding path program 1 times [2024-06-27 20:30:21,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066947997] [2024-06-27 20:30:21,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:21,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:22,380 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 20:30:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066947997] [2024-06-27 20:30:22,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066947997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:22,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:22,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248236727] [2024-06-27 20:30:22,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:22,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:22,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:22,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:22,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 327 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:22,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:22,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:22,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:22,886 INFO L124 PetriNetUnfolderBase]: 1894/2918 cut-off events. [2024-06-27 20:30:22,886 INFO L125 PetriNetUnfolderBase]: For 9080/9084 co-relation queries the response was YES. [2024-06-27 20:30:22,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10162 conditions, 2918 events. 1894/2918 cut-off events. For 9080/9084 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14000 event pairs, 771 based on Foata normal form. 6/2922 useless extension candidates. Maximal degree in co-relation 10139. Up to 2754 conditions per place. [2024-06-27 20:30:22,899 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-27 20:30:22,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 613 flow [2024-06-27 20:30:22,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:30:22,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:30:22,901 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 327 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:30:22,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 613 flow [2024-06-27 20:30:22,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 86 transitions, 597 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 20:30:22,907 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 405 flow [2024-06-27 20:30:22,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 20:30:22,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:30:22,908 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 405 flow [2024-06-27 20:30:22,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:22,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:22,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:22,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:30:22,909 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 20:30:22,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1269334708, now seen corresponding path program 2 times [2024-06-27 20:30:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:22,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262146448] [2024-06-27 20:30:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:22,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:23,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:23,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262146448] [2024-06-27 20:30:23,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262146448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:23,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:23,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:23,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856225987] [2024-06-27 20:30:23,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:23,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:23,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:23,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:23,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:23,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:23,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:23,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:23,927 INFO L124 PetriNetUnfolderBase]: 1889/2910 cut-off events. [2024-06-27 20:30:23,928 INFO L125 PetriNetUnfolderBase]: For 11512/11512 co-relation queries the response was YES. [2024-06-27 20:30:23,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10762 conditions, 2910 events. 1889/2910 cut-off events. For 11512/11512 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13984 event pairs, 767 based on Foata normal form. 2/2910 useless extension candidates. Maximal degree in co-relation 10736. Up to 2773 conditions per place. [2024-06-27 20:30:23,943 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 66 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 20:30:23,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 597 flow [2024-06-27 20:30:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:30:23,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:30:23,945 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 405 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:30:23,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 597 flow [2024-06-27 20:30:23,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 555 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 20:30:23,954 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 393 flow [2024-06-27 20:30:23,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-27 20:30:23,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 20:30:23,954 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 393 flow [2024-06-27 20:30:23,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:23,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:23,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:23,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:30:23,955 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 20:30:23,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:23,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2111046998, now seen corresponding path program 1 times [2024-06-27 20:30:23,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:23,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511005915] [2024-06-27 20:30:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:23,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:24,718 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 20:30:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511005915] [2024-06-27 20:30:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511005915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600427731] [2024-06-27 20:30:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:24,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:24,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:24,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 393 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:24,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:24,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:24,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:25,305 INFO L124 PetriNetUnfolderBase]: 1900/2926 cut-off events. [2024-06-27 20:30:25,306 INFO L125 PetriNetUnfolderBase]: For 13299/13299 co-relation queries the response was YES. [2024-06-27 20:30:25,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 conditions, 2926 events. 1900/2926 cut-off events. For 13299/13299 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14057 event pairs, 746 based on Foata normal form. 2/2926 useless extension candidates. Maximal degree in co-relation 10940. Up to 2768 conditions per place. [2024-06-27 20:30:25,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-27 20:30:25,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 94 transitions, 665 flow [2024-06-27 20:30:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:25,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:30:25,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:30:25,325 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 393 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:30:25,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 94 transitions, 665 flow [2024-06-27 20:30:25,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 631 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:25,334 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 429 flow [2024-06-27 20:30:25,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 20:30:25,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-27 20:30:25,335 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 429 flow [2024-06-27 20:30:25,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:25,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:25,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:30:25,335 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 20:30:25,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2110926842, now seen corresponding path program 1 times [2024-06-27 20:30:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:25,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442601672] [2024-06-27 20:30:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:25,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:26,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:26,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442601672] [2024-06-27 20:30:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442601672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:26,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:26,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112189071] [2024-06-27 20:30:26,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:26,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:26,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:26,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:26,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:26,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 429 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:26,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:26,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:26,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:26,584 INFO L124 PetriNetUnfolderBase]: 1984/3043 cut-off events. [2024-06-27 20:30:26,584 INFO L125 PetriNetUnfolderBase]: For 16952/16956 co-relation queries the response was YES. [2024-06-27 20:30:26,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12028 conditions, 3043 events. 1984/3043 cut-off events. For 16952/16956 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14606 event pairs, 682 based on Foata normal form. 7/3049 useless extension candidates. Maximal degree in co-relation 12000. Up to 2747 conditions per place. [2024-06-27 20:30:26,601 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 86 selfloop transitions, 28 changer transitions 0/118 dead transitions. [2024-06-27 20:30:26,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 118 transitions, 935 flow [2024-06-27 20:30:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:30:26,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-27 20:30:26,603 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 429 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:30:26,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 118 transitions, 935 flow [2024-06-27 20:30:26,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 118 transitions, 889 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:26,615 INFO L231 Difference]: Finished difference. Result has 74 places, 86 transitions, 604 flow [2024-06-27 20:30:26,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=604, PETRI_PLACES=74, PETRI_TRANSITIONS=86} [2024-06-27 20:30:26,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-27 20:30:26,618 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 86 transitions, 604 flow [2024-06-27 20:30:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:26,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:26,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:26,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:30:26,619 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 20:30:26,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2110927028, now seen corresponding path program 2 times [2024-06-27 20:30:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:26,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249547074] [2024-06-27 20:30:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:26,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:27,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:27,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249547074] [2024-06-27 20:30:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249547074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:27,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98494009] [2024-06-27 20:30:27,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:27,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:27,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:27,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:27,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 86 transitions, 604 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:27,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:27,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:27,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:27,853 INFO L124 PetriNetUnfolderBase]: 1995/3062 cut-off events. [2024-06-27 20:30:27,853 INFO L125 PetriNetUnfolderBase]: For 21866/21870 co-relation queries the response was YES. [2024-06-27 20:30:27,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13521 conditions, 3062 events. 1995/3062 cut-off events. For 21866/21870 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 14633 event pairs, 719 based on Foata normal form. 6/3066 useless extension candidates. Maximal degree in co-relation 13489. Up to 2856 conditions per place. [2024-06-27 20:30:27,876 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 26 changer transitions 0/116 dead transitions. [2024-06-27 20:30:27,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1004 flow [2024-06-27 20:30:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:30:27,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:30:27,878 INFO L175 Difference]: Start difference. First operand has 74 places, 86 transitions, 604 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:30:27,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1004 flow [2024-06-27 20:30:27,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 968 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-27 20:30:27,896 INFO L231 Difference]: Finished difference. Result has 80 places, 92 transitions, 710 flow [2024-06-27 20:30:27,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=710, PETRI_PLACES=80, PETRI_TRANSITIONS=92} [2024-06-27 20:30:27,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 20:30:27,897 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 92 transitions, 710 flow [2024-06-27 20:30:27,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:27,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:27,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:27,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:30:27,898 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 20:30:27,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:27,898 INFO L85 PathProgramCache]: Analyzing trace with hash -673940364, now seen corresponding path program 2 times [2024-06-27 20:30:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:27,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224990381] [2024-06-27 20:30:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:27,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:28,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:28,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224990381] [2024-06-27 20:30:28,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224990381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:28,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:28,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:28,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329185039] [2024-06-27 20:30:28,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:28,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:28,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:28,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:28,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:28,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:28,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 92 transitions, 710 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:28,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:28,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:28,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:29,066 INFO L124 PetriNetUnfolderBase]: 2031/3111 cut-off events. [2024-06-27 20:30:29,067 INFO L125 PetriNetUnfolderBase]: For 26464/26464 co-relation queries the response was YES. [2024-06-27 20:30:29,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14381 conditions, 3111 events. 2031/3111 cut-off events. For 26464/26464 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14870 event pairs, 706 based on Foata normal form. 6/3116 useless extension candidates. Maximal degree in co-relation 14346. Up to 2931 conditions per place. [2024-06-27 20:30:29,084 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 21 changer transitions 0/120 dead transitions. [2024-06-27 20:30:29,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 120 transitions, 1092 flow [2024-06-27 20:30:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:29,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:30:29,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:30:29,086 INFO L175 Difference]: Start difference. First operand has 80 places, 92 transitions, 710 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:30:29,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 120 transitions, 1092 flow [2024-06-27 20:30:29,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 1040 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:29,105 INFO L231 Difference]: Finished difference. Result has 85 places, 98 transitions, 775 flow [2024-06-27 20:30:29,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=775, PETRI_PLACES=85, PETRI_TRANSITIONS=98} [2024-06-27 20:30:29,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 20:30:29,106 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 98 transitions, 775 flow [2024-06-27 20:30:29,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:29,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:29,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:29,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:30:29,107 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 20:30:29,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:29,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1933795508, now seen corresponding path program 3 times [2024-06-27 20:30:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:29,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017200192] [2024-06-27 20:30:29,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:29,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017200192] [2024-06-27 20:30:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017200192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:29,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:29,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:29,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241658520] [2024-06-27 20:30:29,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:29,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:29,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:29,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:29,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:29,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:29,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 98 transitions, 775 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:29,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:29,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:29,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:30,249 INFO L124 PetriNetUnfolderBase]: 2026/3106 cut-off events. [2024-06-27 20:30:30,249 INFO L125 PetriNetUnfolderBase]: For 29589/29589 co-relation queries the response was YES. [2024-06-27 20:30:30,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14809 conditions, 3106 events. 2026/3106 cut-off events. For 29589/29589 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14865 event pairs, 712 based on Foata normal form. 2/3106 useless extension candidates. Maximal degree in co-relation 14771. Up to 2960 conditions per place. [2024-06-27 20:30:30,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 14 changer transitions 0/117 dead transitions. [2024-06-27 20:30:30,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 1049 flow [2024-06-27 20:30:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:30:30,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:30:30,270 INFO L175 Difference]: Start difference. First operand has 85 places, 98 transitions, 775 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:30:30,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 1049 flow [2024-06-27 20:30:30,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 974 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:30,294 INFO L231 Difference]: Finished difference. Result has 88 places, 98 transitions, 736 flow [2024-06-27 20:30:30,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=736, PETRI_PLACES=88, PETRI_TRANSITIONS=98} [2024-06-27 20:30:30,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-27 20:30:30,295 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 98 transitions, 736 flow [2024-06-27 20:30:30,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:30,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:30,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:30,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:30:30,295 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 20:30:30,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash -219614138, now seen corresponding path program 3 times [2024-06-27 20:30:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:30,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961203874] [2024-06-27 20:30:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:30,970 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 20:30:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:30,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961203874] [2024-06-27 20:30:30,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961203874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:30,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:30,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62293545] [2024-06-27 20:30:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:30,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:30,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:30,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:31,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:31,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 98 transitions, 736 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:31,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:31,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:31,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:31,525 INFO L124 PetriNetUnfolderBase]: 2030/3110 cut-off events. [2024-06-27 20:30:31,525 INFO L125 PetriNetUnfolderBase]: For 32344/32344 co-relation queries the response was YES. [2024-06-27 20:30:31,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14946 conditions, 3110 events. 2030/3110 cut-off events. For 32344/32344 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14879 event pairs, 699 based on Foata normal form. 6/3115 useless extension candidates. Maximal degree in co-relation 14908. Up to 2870 conditions per place. [2024-06-27 20:30:31,542 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-27 20:30:31,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 129 transitions, 1203 flow [2024-06-27 20:30:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-27 20:30:31,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-27 20:30:31,543 INFO L175 Difference]: Start difference. First operand has 88 places, 98 transitions, 736 flow. Second operand 7 states and 135 transitions. [2024-06-27 20:30:31,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 129 transitions, 1203 flow [2024-06-27 20:30:31,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1159 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:31,566 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 854 flow [2024-06-27 20:30:31,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=854, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-27 20:30:31,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 20:30:31,567 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 854 flow [2024-06-27 20:30:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:31,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:31,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:31,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:30:31,568 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 20:30:31,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:31,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1933549244, now seen corresponding path program 1 times [2024-06-27 20:30:31,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:31,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679423985] [2024-06-27 20:30:31,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:31,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:32,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:32,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679423985] [2024-06-27 20:30:32,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679423985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:32,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:32,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:30:32,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511565573] [2024-06-27 20:30:32,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:32,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:30:32,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:30:32,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:30:32,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:32,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 854 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:32,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:32,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:32,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:33,026 INFO L124 PetriNetUnfolderBase]: 2033/3114 cut-off events. [2024-06-27 20:30:33,026 INFO L125 PetriNetUnfolderBase]: For 37304/37304 co-relation queries the response was YES. [2024-06-27 20:30:33,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 3114 events. 2033/3114 cut-off events. For 37304/37304 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14871 event pairs, 679 based on Foata normal form. 6/3119 useless extension candidates. Maximal degree in co-relation 15508. Up to 2915 conditions per place. [2024-06-27 20:30:33,044 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 101 selfloop transitions, 25 changer transitions 0/130 dead transitions. [2024-06-27 20:30:33,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 130 transitions, 1256 flow [2024-06-27 20:30:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:30:33,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:30:33,046 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 854 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:30:33,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 130 transitions, 1256 flow [2024-06-27 20:30:33,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 130 transitions, 1205 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:33,066 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 907 flow [2024-06-27 20:30:33,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=907, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-27 20:30:33,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-27 20:30:33,067 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 907 flow [2024-06-27 20:30:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:33,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:33,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:30:33,068 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:33,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1517442386, now seen corresponding path program 1 times [2024-06-27 20:30:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:33,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080821345] [2024-06-27 20:30:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:33,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:33,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:33,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:33,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:33,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080821345] [2024-06-27 20:30:33,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080821345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:33,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:33,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:30:33,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094773588] [2024-06-27 20:30:33,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:33,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:30:33,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:33,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:30:33,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:30:33,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:33,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 907 flow. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:33,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:33,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:33,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:33,983 INFO L124 PetriNetUnfolderBase]: 1904/2984 cut-off events. [2024-06-27 20:30:33,983 INFO L125 PetriNetUnfolderBase]: For 40030/40030 co-relation queries the response was YES. [2024-06-27 20:30:33,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15435 conditions, 2984 events. 1904/2984 cut-off events. For 40030/40030 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14698 event pairs, 703 based on Foata normal form. 1/2984 useless extension candidates. Maximal degree in co-relation 15393. Up to 2769 conditions per place. [2024-06-27 20:30:34,003 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 94 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-27 20:30:34,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 116 transitions, 1131 flow [2024-06-27 20:30:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:30:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:30:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-27 20:30:34,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-27 20:30:34,004 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 907 flow. Second operand 5 states and 92 transitions. [2024-06-27 20:30:34,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 116 transitions, 1131 flow [2024-06-27 20:30:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1043 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:34,031 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 841 flow [2024-06-27 20:30:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=841, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-27 20:30:34,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-27 20:30:34,032 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 841 flow [2024-06-27 20:30:34,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:34,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:30:34,032 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 20:30:34,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -17567051, now seen corresponding path program 1 times [2024-06-27 20:30:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657199439] [2024-06-27 20:30:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657199439] [2024-06-27 20:30:35,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657199439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:35,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745020106] [2024-06-27 20:30:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 841 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:35,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:35,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:35,822 INFO L124 PetriNetUnfolderBase]: 2041/3126 cut-off events. [2024-06-27 20:30:35,822 INFO L125 PetriNetUnfolderBase]: For 43913/43913 co-relation queries the response was YES. [2024-06-27 20:30:35,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16204 conditions, 3126 events. 2041/3126 cut-off events. For 43913/43913 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14902 event pairs, 682 based on Foata normal form. 2/3127 useless extension candidates. Maximal degree in co-relation 16161. Up to 2942 conditions per place. [2024-06-27 20:30:35,839 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-27 20:30:35,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 147 transitions, 1267 flow [2024-06-27 20:30:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:30:35,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:30:35,841 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 841 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:30:35,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 147 transitions, 1267 flow [2024-06-27 20:30:35,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 147 transitions, 1245 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:35,869 INFO L231 Difference]: Finished difference. Result has 99 places, 111 transitions, 922 flow [2024-06-27 20:30:35,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=922, PETRI_PLACES=99, PETRI_TRANSITIONS=111} [2024-06-27 20:30:35,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 20:30:35,870 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 111 transitions, 922 flow [2024-06-27 20:30:35,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:35,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:35,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:35,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:30:35,871 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 20:30:35,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1582445976, now seen corresponding path program 1 times [2024-06-27 20:30:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200359213] [2024-06-27 20:30:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:35,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200359213] [2024-06-27 20:30:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200359213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:36,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:36,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:36,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939368704] [2024-06-27 20:30:36,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:36,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:36,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:36,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:36,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:36,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:36,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 111 transitions, 922 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:36,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:36,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:36,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:37,414 INFO L124 PetriNetUnfolderBase]: 2101/3199 cut-off events. [2024-06-27 20:30:37,414 INFO L125 PetriNetUnfolderBase]: For 50594/50594 co-relation queries the response was YES. [2024-06-27 20:30:37,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17318 conditions, 3199 events. 2101/3199 cut-off events. For 50594/50594 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15235 event pairs, 665 based on Foata normal form. 6/3202 useless extension candidates. Maximal degree in co-relation 17275. Up to 2996 conditions per place. [2024-06-27 20:30:37,433 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 27 changer transitions 0/156 dead transitions. [2024-06-27 20:30:37,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 156 transitions, 1538 flow [2024-06-27 20:30:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:30:37,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:30:37,434 INFO L175 Difference]: Start difference. First operand has 99 places, 111 transitions, 922 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:30:37,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 156 transitions, 1538 flow [2024-06-27 20:30:37,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1461 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:37,464 INFO L231 Difference]: Finished difference. Result has 102 places, 122 transitions, 1059 flow [2024-06-27 20:30:37,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1059, PETRI_PLACES=102, PETRI_TRANSITIONS=122} [2024-06-27 20:30:37,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:30:37,465 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 122 transitions, 1059 flow [2024-06-27 20:30:37,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:37,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:37,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:37,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:30:37,466 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 20:30:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1014227215, now seen corresponding path program 2 times [2024-06-27 20:30:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143358478] [2024-06-27 20:30:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:37,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:38,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143358478] [2024-06-27 20:30:38,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143358478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:38,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:38,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:38,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426483531] [2024-06-27 20:30:38,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:38,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:38,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:38,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:38,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 122 transitions, 1059 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:38,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:38,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:38,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:39,042 INFO L124 PetriNetUnfolderBase]: 2112/3222 cut-off events. [2024-06-27 20:30:39,042 INFO L125 PetriNetUnfolderBase]: For 58524/58530 co-relation queries the response was YES. [2024-06-27 20:30:39,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18439 conditions, 3222 events. 2112/3222 cut-off events. For 58524/58530 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15384 event pairs, 678 based on Foata normal form. 8/3226 useless extension candidates. Maximal degree in co-relation 18393. Up to 3018 conditions per place. [2024-06-27 20:30:39,062 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 118 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-06-27 20:30:39,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 1477 flow [2024-06-27 20:30:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:39,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:30:39,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:30:39,064 INFO L175 Difference]: Start difference. First operand has 102 places, 122 transitions, 1059 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:30:39,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 1477 flow [2024-06-27 20:30:39,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 151 transitions, 1359 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:39,098 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1071 flow [2024-06-27 20:30:39,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1071, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-27 20:30:39,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 20:30:39,099 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1071 flow [2024-06-27 20:30:39,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:39,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:39,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:39,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:30:39,099 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 20:30:39,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1014227060, now seen corresponding path program 2 times [2024-06-27 20:30:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131897608] [2024-06-27 20:30:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:39,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:39,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131897608] [2024-06-27 20:30:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131897608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:39,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:39,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:39,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348424331] [2024-06-27 20:30:39,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:39,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:39,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:40,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:40,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1071 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:40,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:40,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:40,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:40,527 INFO L124 PetriNetUnfolderBase]: 2228/3380 cut-off events. [2024-06-27 20:30:40,527 INFO L125 PetriNetUnfolderBase]: For 68108/68114 co-relation queries the response was YES. [2024-06-27 20:30:40,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19950 conditions, 3380 events. 2228/3380 cut-off events. For 68108/68114 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16156 event pairs, 659 based on Foata normal form. 8/3385 useless extension candidates. Maximal degree in co-relation 19903. Up to 2812 conditions per place. [2024-06-27 20:30:40,547 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 117 selfloop transitions, 54 changer transitions 0/175 dead transitions. [2024-06-27 20:30:40,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 175 transitions, 1961 flow [2024-06-27 20:30:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:30:40,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 20:30:40,548 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1071 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:30:40,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 175 transitions, 1961 flow [2024-06-27 20:30:40,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 175 transitions, 1855 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:40,591 INFO L231 Difference]: Finished difference. Result has 109 places, 136 transitions, 1243 flow [2024-06-27 20:30:40,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1243, PETRI_PLACES=109, PETRI_TRANSITIONS=136} [2024-06-27 20:30:40,591 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 20:30:40,591 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 136 transitions, 1243 flow [2024-06-27 20:30:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:40,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:40,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:40,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:30:40,592 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 20:30:40,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1014221480, now seen corresponding path program 3 times [2024-06-27 20:30:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012428038] [2024-06-27 20:30:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:40,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:41,380 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 20:30:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012428038] [2024-06-27 20:30:41,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012428038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:41,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:41,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:41,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336218889] [2024-06-27 20:30:41,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:41,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:41,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:41,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:41,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:41,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:41,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 136 transitions, 1243 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:41,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:41,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:41,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:42,047 INFO L124 PetriNetUnfolderBase]: 2232/3386 cut-off events. [2024-06-27 20:30:42,047 INFO L125 PetriNetUnfolderBase]: For 76089/76095 co-relation queries the response was YES. [2024-06-27 20:30:42,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20988 conditions, 3386 events. 2232/3386 cut-off events. For 76089/76095 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16171 event pairs, 651 based on Foata normal form. 8/3391 useless extension candidates. Maximal degree in co-relation 20939. Up to 2821 conditions per place. [2024-06-27 20:30:42,071 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 110 selfloop transitions, 62 changer transitions 0/176 dead transitions. [2024-06-27 20:30:42,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 176 transitions, 1968 flow [2024-06-27 20:30:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 20:30:42,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-27 20:30:42,073 INFO L175 Difference]: Start difference. First operand has 109 places, 136 transitions, 1243 flow. Second operand 8 states and 164 transitions. [2024-06-27 20:30:42,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 176 transitions, 1968 flow [2024-06-27 20:30:42,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1837 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-27 20:30:42,132 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1320 flow [2024-06-27 20:30:42,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1320, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2024-06-27 20:30:42,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 20:30:42,132 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1320 flow [2024-06-27 20:30:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:42,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:42,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:42,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:30:42,133 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 20:30:42,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:42,134 INFO L85 PathProgramCache]: Analyzing trace with hash 582686378, now seen corresponding path program 4 times [2024-06-27 20:30:42,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662558748] [2024-06-27 20:30:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:42,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:42,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662558748] [2024-06-27 20:30:42,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662558748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:42,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:42,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:42,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092214095] [2024-06-27 20:30:42,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:42,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:42,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1320 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:43,543 INFO L124 PetriNetUnfolderBase]: 2268/3444 cut-off events. [2024-06-27 20:30:43,543 INFO L125 PetriNetUnfolderBase]: For 81613/81613 co-relation queries the response was YES. [2024-06-27 20:30:43,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21448 conditions, 3444 events. 2268/3444 cut-off events. For 81613/81613 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16554 event pairs, 695 based on Foata normal form. 6/3446 useless extension candidates. Maximal degree in co-relation 21397. Up to 3239 conditions per place. [2024-06-27 20:30:43,568 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 141 selfloop transitions, 25 changer transitions 0/170 dead transitions. [2024-06-27 20:30:43,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 170 transitions, 1836 flow [2024-06-27 20:30:43,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:30:43,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:30:43,570 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1320 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:30:43,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 170 transitions, 1836 flow [2024-06-27 20:30:43,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 170 transitions, 1693 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:43,625 INFO L231 Difference]: Finished difference. Result has 117 places, 144 transitions, 1318 flow [2024-06-27 20:30:43,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=117, PETRI_TRANSITIONS=144} [2024-06-27 20:30:43,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-27 20:30:43,625 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 144 transitions, 1318 flow [2024-06-27 20:30:43,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:43,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:43,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:43,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:30:43,626 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 20:30:43,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:43,626 INFO L85 PathProgramCache]: Analyzing trace with hash -2045982406, now seen corresponding path program 5 times [2024-06-27 20:30:43,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:43,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006943605] [2024-06-27 20:30:43,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:43,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006943605] [2024-06-27 20:30:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006943605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:44,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:44,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:44,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164535763] [2024-06-27 20:30:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:44,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:44,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:44,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 144 transitions, 1318 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:44,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:44,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:44,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:45,078 INFO L124 PetriNetUnfolderBase]: 2320/3518 cut-off events. [2024-06-27 20:30:45,079 INFO L125 PetriNetUnfolderBase]: For 88697/88697 co-relation queries the response was YES. [2024-06-27 20:30:45,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22022 conditions, 3518 events. 2320/3518 cut-off events. For 88697/88697 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16889 event pairs, 690 based on Foata normal form. 6/3520 useless extension candidates. Maximal degree in co-relation 21970. Up to 3142 conditions per place. [2024-06-27 20:30:45,105 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 138 selfloop transitions, 41 changer transitions 0/183 dead transitions. [2024-06-27 20:30:45,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 183 transitions, 2104 flow [2024-06-27 20:30:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:30:45,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:30:45,106 INFO L175 Difference]: Start difference. First operand has 117 places, 144 transitions, 1318 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:30:45,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 183 transitions, 2104 flow [2024-06-27 20:30:45,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 2003 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:45,169 INFO L231 Difference]: Finished difference. Result has 120 places, 153 transitions, 1509 flow [2024-06-27 20:30:45,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1509, PETRI_PLACES=120, PETRI_TRANSITIONS=153} [2024-06-27 20:30:45,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 20:30:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 153 transitions, 1509 flow [2024-06-27 20:30:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:45,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:45,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:45,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:30:45,170 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 20:30:45,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:45,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1781891761, now seen corresponding path program 3 times [2024-06-27 20:30:45,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:45,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206524001] [2024-06-27 20:30:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:45,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206524001] [2024-06-27 20:30:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206524001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:46,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:46,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:46,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654716026] [2024-06-27 20:30:46,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:46,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:46,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:46,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:46,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:46,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 153 transitions, 1509 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:46,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:46,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:46,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:46,715 INFO L124 PetriNetUnfolderBase]: 2315/3511 cut-off events. [2024-06-27 20:30:46,715 INFO L125 PetriNetUnfolderBase]: For 95381/95381 co-relation queries the response was YES. [2024-06-27 20:30:46,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22477 conditions, 3511 events. 2315/3511 cut-off events. For 95381/95381 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16849 event pairs, 707 based on Foata normal form. 2/3509 useless extension candidates. Maximal degree in co-relation 22423. Up to 3365 conditions per place. [2024-06-27 20:30:46,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 158 selfloop transitions, 17 changer transitions 0/179 dead transitions. [2024-06-27 20:30:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 179 transitions, 1993 flow [2024-06-27 20:30:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:30:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 20:30:46,742 INFO L175 Difference]: Start difference. First operand has 120 places, 153 transitions, 1509 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:30:46,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 179 transitions, 1993 flow [2024-06-27 20:30:46,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1835 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:46,813 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1475 flow [2024-06-27 20:30:46,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1475, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-27 20:30:46,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 20:30:46,813 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1475 flow [2024-06-27 20:30:46,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:46,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:46,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:46,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:30:46,814 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 20:30:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 189507121, now seen corresponding path program 1 times [2024-06-27 20:30:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415067741] [2024-06-27 20:30:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:47,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:47,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415067741] [2024-06-27 20:30:47,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415067741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:47,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:47,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:47,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619367160] [2024-06-27 20:30:47,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:47,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:47,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:47,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:47,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:47,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1475 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:47,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:47,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:47,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:48,344 INFO L124 PetriNetUnfolderBase]: 2317/3519 cut-off events. [2024-06-27 20:30:48,344 INFO L125 PetriNetUnfolderBase]: For 99881/99881 co-relation queries the response was YES. [2024-06-27 20:30:48,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22545 conditions, 3519 events. 2317/3519 cut-off events. For 99881/99881 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16911 event pairs, 682 based on Foata normal form. 3/3521 useless extension candidates. Maximal degree in co-relation 22490. Up to 3310 conditions per place. [2024-06-27 20:30:48,366 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 147 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2024-06-27 20:30:48,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 181 transitions, 1999 flow [2024-06-27 20:30:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:30:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:30:48,367 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1475 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:30:48,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 181 transitions, 1999 flow [2024-06-27 20:30:48,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1901 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:48,422 INFO L231 Difference]: Finished difference. Result has 124 places, 160 transitions, 1527 flow [2024-06-27 20:30:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1527, PETRI_PLACES=124, PETRI_TRANSITIONS=160} [2024-06-27 20:30:48,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 20:30:48,423 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 160 transitions, 1527 flow [2024-06-27 20:30:48,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:48,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:30:48,423 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 20:30:48,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1781891916, now seen corresponding path program 6 times [2024-06-27 20:30:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009435274] [2024-06-27 20:30:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009435274] [2024-06-27 20:30:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009435274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462521431] [2024-06-27 20:30:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:49,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:49,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 160 transitions, 1527 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:49,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:49,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:49,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:49,741 INFO L124 PetriNetUnfolderBase]: 2305/3504 cut-off events. [2024-06-27 20:30:49,742 INFO L125 PetriNetUnfolderBase]: For 105287/105287 co-relation queries the response was YES. [2024-06-27 20:30:49,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22981 conditions, 3504 events. 2305/3504 cut-off events. For 105287/105287 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16845 event pairs, 668 based on Foata normal form. 6/3509 useless extension candidates. Maximal degree in co-relation 22925. Up to 3132 conditions per place. [2024-06-27 20:30:49,768 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 145 selfloop transitions, 40 changer transitions 0/189 dead transitions. [2024-06-27 20:30:49,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 189 transitions, 2123 flow [2024-06-27 20:30:49,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:30:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:30:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:30:49,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:30:49,769 INFO L175 Difference]: Start difference. First operand has 124 places, 160 transitions, 1527 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:30:49,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 189 transitions, 2123 flow [2024-06-27 20:30:49,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 189 transitions, 1983 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:49,852 INFO L231 Difference]: Finished difference. Result has 127 places, 160 transitions, 1477 flow [2024-06-27 20:30:49,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1477, PETRI_PLACES=127, PETRI_TRANSITIONS=160} [2024-06-27 20:30:49,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:30:49,853 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 160 transitions, 1477 flow [2024-06-27 20:30:49,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:49,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:49,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:49,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:30:49,853 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:49,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -203925216, now seen corresponding path program 1 times [2024-06-27 20:30:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:49,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847821189] [2024-06-27 20:30:49,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:49,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:50,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:50,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847821189] [2024-06-27 20:30:50,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847821189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:50,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:50,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:30:50,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863199229] [2024-06-27 20:30:50,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:50,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:30:50,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:30:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:30:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:50,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 160 transitions, 1477 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:50,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:50,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:50,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:51,007 INFO L124 PetriNetUnfolderBase]: 2383/3561 cut-off events. [2024-06-27 20:30:51,007 INFO L125 PetriNetUnfolderBase]: For 124242/124266 co-relation queries the response was YES. [2024-06-27 20:30:51,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24478 conditions, 3561 events. 2383/3561 cut-off events. For 124242/124266 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 16899 event pairs, 765 based on Foata normal form. 1/3522 useless extension candidates. Maximal degree in co-relation 24421. Up to 3439 conditions per place. [2024-06-27 20:30:51,032 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 147 selfloop transitions, 11 changer transitions 0/172 dead transitions. [2024-06-27 20:30:51,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 172 transitions, 1843 flow [2024-06-27 20:30:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:30:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:30:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:30:51,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 20:30:51,033 INFO L175 Difference]: Start difference. First operand has 127 places, 160 transitions, 1477 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:30:51,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 172 transitions, 1843 flow [2024-06-27 20:30:51,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 172 transitions, 1747 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:51,095 INFO L231 Difference]: Finished difference. Result has 126 places, 163 transitions, 1443 flow [2024-06-27 20:30:51,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1443, PETRI_PLACES=126, PETRI_TRANSITIONS=163} [2024-06-27 20:30:51,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 20:30:51,095 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 163 transitions, 1443 flow [2024-06-27 20:30:51,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:51,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:51,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:51,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:30:51,095 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:51,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1494419479, now seen corresponding path program 1 times [2024-06-27 20:30:51,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:51,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730207180] [2024-06-27 20:30:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730207180] [2024-06-27 20:30:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730207180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:52,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:52,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:52,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223175690] [2024-06-27 20:30:52,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:52,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:52,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:52,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:52,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:52,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:52,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 163 transitions, 1443 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:52,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:52,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:52,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:53,068 INFO L124 PetriNetUnfolderBase]: 2416/3642 cut-off events. [2024-06-27 20:30:53,068 INFO L125 PetriNetUnfolderBase]: For 136417/136417 co-relation queries the response was YES. [2024-06-27 20:30:53,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25537 conditions, 3642 events. 2416/3642 cut-off events. For 136417/136417 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17498 event pairs, 542 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 25480. Up to 3378 conditions per place. [2024-06-27 20:30:53,093 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 25 changer transitions 0/211 dead transitions. [2024-06-27 20:30:53,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 211 transitions, 2213 flow [2024-06-27 20:30:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:30:53,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:30:53,094 INFO L175 Difference]: Start difference. First operand has 126 places, 163 transitions, 1443 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:30:53,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 211 transitions, 2213 flow [2024-06-27 20:30:53,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 211 transitions, 2173 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:30:53,163 INFO L231 Difference]: Finished difference. Result has 132 places, 167 transitions, 1608 flow [2024-06-27 20:30:53,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1608, PETRI_PLACES=132, PETRI_TRANSITIONS=167} [2024-06-27 20:30:53,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 20:30:53,163 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 167 transitions, 1608 flow [2024-06-27 20:30:53,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:53,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:53,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:53,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:30:53,164 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 20:30:53,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:53,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1494359029, now seen corresponding path program 2 times [2024-06-27 20:30:53,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:53,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634714533] [2024-06-27 20:30:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:53,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:54,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:54,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634714533] [2024-06-27 20:30:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634714533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:54,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:54,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:54,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48344148] [2024-06-27 20:30:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:54,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:54,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:54,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:54,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 167 transitions, 1608 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:54,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:54,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:54,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:55,141 INFO L124 PetriNetUnfolderBase]: 2408/3630 cut-off events. [2024-06-27 20:30:55,141 INFO L125 PetriNetUnfolderBase]: For 145081/145081 co-relation queries the response was YES. [2024-06-27 20:30:55,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25875 conditions, 3630 events. 2408/3630 cut-off events. For 145081/145081 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17471 event pairs, 681 based on Foata normal form. 4/3633 useless extension candidates. Maximal degree in co-relation 25817. Up to 3425 conditions per place. [2024-06-27 20:30:55,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 181 selfloop transitions, 22 changer transitions 0/208 dead transitions. [2024-06-27 20:30:55,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 208 transitions, 2118 flow [2024-06-27 20:30:55,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:55,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:30:55,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-27 20:30:55,169 INFO L175 Difference]: Start difference. First operand has 132 places, 167 transitions, 1608 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:30:55,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 208 transitions, 2118 flow [2024-06-27 20:30:55,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 208 transitions, 1959 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:55,274 INFO L231 Difference]: Finished difference. Result has 136 places, 167 transitions, 1500 flow [2024-06-27 20:30:55,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1449, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1500, PETRI_PLACES=136, PETRI_TRANSITIONS=167} [2024-06-27 20:30:55,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 20:30:55,275 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 167 transitions, 1500 flow [2024-06-27 20:30:55,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:55,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:55,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:55,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:30:55,275 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 20:30:55,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:55,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1494358905, now seen corresponding path program 1 times [2024-06-27 20:30:55,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:55,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340560898] [2024-06-27 20:30:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:55,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:56,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:56,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340560898] [2024-06-27 20:30:56,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340560898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:56,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:56,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:56,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062876856] [2024-06-27 20:30:56,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:56,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:56,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:56,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:56,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:56,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:56,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 167 transitions, 1500 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:56,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:56,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:56,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:57,033 INFO L124 PetriNetUnfolderBase]: 2547/3810 cut-off events. [2024-06-27 20:30:57,033 INFO L125 PetriNetUnfolderBase]: For 156799/156799 co-relation queries the response was YES. [2024-06-27 20:30:57,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27325 conditions, 3810 events. 2547/3810 cut-off events. For 156799/156799 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18341 event pairs, 671 based on Foata normal form. 6/3805 useless extension candidates. Maximal degree in co-relation 27265. Up to 3451 conditions per place. [2024-06-27 20:30:57,059 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 41 changer transitions 0/234 dead transitions. [2024-06-27 20:30:57,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 234 transitions, 2720 flow [2024-06-27 20:30:57,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:30:57,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-27 20:30:57,060 INFO L175 Difference]: Start difference. First operand has 136 places, 167 transitions, 1500 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:30:57,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 234 transitions, 2720 flow [2024-06-27 20:30:57,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 234 transitions, 2665 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 20:30:57,133 INFO L231 Difference]: Finished difference. Result has 139 places, 181 transitions, 1779 flow [2024-06-27 20:30:57,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1779, PETRI_PLACES=139, PETRI_TRANSITIONS=181} [2024-06-27 20:30:57,134 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 20:30:57,134 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 181 transitions, 1779 flow [2024-06-27 20:30:57,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:57,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:57,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:30:57,134 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 20:30:57,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1491557745, now seen corresponding path program 2 times [2024-06-27 20:30:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299055529] [2024-06-27 20:30:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:58,079 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 20:30:58,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:58,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299055529] [2024-06-27 20:30:58,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299055529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:58,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:58,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:58,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748691369] [2024-06-27 20:30:58,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:58,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:58,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:58,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:58,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:58,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:30:58,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 181 transitions, 1779 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:58,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:58,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:30:58,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:59,008 INFO L124 PetriNetUnfolderBase]: 2581/3862 cut-off events. [2024-06-27 20:30:59,008 INFO L125 PetriNetUnfolderBase]: For 173091/173093 co-relation queries the response was YES. [2024-06-27 20:30:59,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28928 conditions, 3862 events. 2581/3862 cut-off events. For 173091/173093 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18692 event pairs, 678 based on Foata normal form. 6/3857 useless extension candidates. Maximal degree in co-relation 28865. Up to 3622 conditions per place. [2024-06-27 20:30:59,043 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 31 changer transitions 0/224 dead transitions. [2024-06-27 20:30:59,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 224 transitions, 2590 flow [2024-06-27 20:30:59,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:59,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:30:59,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-27 20:30:59,044 INFO L175 Difference]: Start difference. First operand has 139 places, 181 transitions, 1779 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:30:59,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 224 transitions, 2590 flow [2024-06-27 20:30:59,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2431 flow, removed 64 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:59,183 INFO L231 Difference]: Finished difference. Result has 143 places, 185 transitions, 1790 flow [2024-06-27 20:30:59,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1790, PETRI_PLACES=143, PETRI_TRANSITIONS=185} [2024-06-27 20:30:59,183 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:30:59,183 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 185 transitions, 1790 flow [2024-06-27 20:30:59,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:59,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:59,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:59,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:30:59,184 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 20:30:59,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:59,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1491562395, now seen corresponding path program 3 times [2024-06-27 20:30:59,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:59,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686009310] [2024-06-27 20:30:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:59,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:00,173 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 20:31:00,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:00,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686009310] [2024-06-27 20:31:00,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686009310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:00,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:00,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:00,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455894533] [2024-06-27 20:31:00,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:00,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:00,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:00,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:00,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:00,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:00,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 185 transitions, 1790 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:00,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:00,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:00,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:01,071 INFO L124 PetriNetUnfolderBase]: 2585/3868 cut-off events. [2024-06-27 20:31:01,072 INFO L125 PetriNetUnfolderBase]: For 179864/179866 co-relation queries the response was YES. [2024-06-27 20:31:01,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29019 conditions, 3868 events. 2585/3868 cut-off events. For 179864/179866 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18685 event pairs, 675 based on Foata normal form. 6/3863 useless extension candidates. Maximal degree in co-relation 28954. Up to 3565 conditions per place. [2024-06-27 20:31:01,106 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 192 selfloop transitions, 41 changer transitions 0/238 dead transitions. [2024-06-27 20:31:01,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 238 transitions, 2770 flow [2024-06-27 20:31:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:31:01,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:31:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:31:01,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:31:01,108 INFO L175 Difference]: Start difference. First operand has 143 places, 185 transitions, 1790 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:31:01,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 238 transitions, 2770 flow [2024-06-27 20:31:01,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 238 transitions, 2651 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:01,278 INFO L231 Difference]: Finished difference. Result has 147 places, 192 transitions, 1929 flow [2024-06-27 20:31:01,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1929, PETRI_PLACES=147, PETRI_TRANSITIONS=192} [2024-06-27 20:31:01,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 20:31:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 192 transitions, 1929 flow [2024-06-27 20:31:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:01,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:01,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:31:01,279 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 20:31:01,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1716175909, now seen corresponding path program 4 times [2024-06-27 20:31:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830336224] [2024-06-27 20:31:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:02,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:02,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830336224] [2024-06-27 20:31:02,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830336224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:02,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:02,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:02,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75074780] [2024-06-27 20:31:02,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:02,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:02,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:02,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:02,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:02,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:02,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 192 transitions, 1929 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:02,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:02,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:02,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:03,081 INFO L124 PetriNetUnfolderBase]: 2623/3933 cut-off events. [2024-06-27 20:31:03,082 INFO L125 PetriNetUnfolderBase]: For 193915/193919 co-relation queries the response was YES. [2024-06-27 20:31:03,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29920 conditions, 3933 events. 2623/3933 cut-off events. For 193915/193919 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19122 event pairs, 603 based on Foata normal form. 7/3939 useless extension candidates. Maximal degree in co-relation 29853. Up to 3215 conditions per place. [2024-06-27 20:31:03,114 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 79 changer transitions 0/241 dead transitions. [2024-06-27 20:31:03,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 241 transitions, 3013 flow [2024-06-27 20:31:03,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:03,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:03,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 20:31:03,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 20:31:03,116 INFO L175 Difference]: Start difference. First operand has 147 places, 192 transitions, 1929 flow. Second operand 9 states and 184 transitions. [2024-06-27 20:31:03,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 241 transitions, 3013 flow [2024-06-27 20:31:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 241 transitions, 2896 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:03,244 INFO L231 Difference]: Finished difference. Result has 151 places, 199 transitions, 2156 flow [2024-06-27 20:31:03,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=151, PETRI_TRANSITIONS=199} [2024-06-27 20:31:03,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-27 20:31:03,244 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 199 transitions, 2156 flow [2024-06-27 20:31:03,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:03,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:03,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:03,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:31:03,245 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:03,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:03,245 INFO L85 PathProgramCache]: Analyzing trace with hash 833239179, now seen corresponding path program 3 times [2024-06-27 20:31:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:03,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978496376] [2024-06-27 20:31:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:03,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:04,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978496376] [2024-06-27 20:31:04,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978496376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:04,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:04,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:04,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271713551] [2024-06-27 20:31:04,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:04,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:04,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:04,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:04,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:04,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 199 transitions, 2156 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:04,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:04,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:04,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:05,037 INFO L124 PetriNetUnfolderBase]: 2628/3948 cut-off events. [2024-06-27 20:31:05,037 INFO L125 PetriNetUnfolderBase]: For 209625/209629 co-relation queries the response was YES. [2024-06-27 20:31:05,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31500 conditions, 3948 events. 2628/3948 cut-off events. For 209625/209629 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 19189 event pairs, 687 based on Foata normal form. 8/3955 useless extension candidates. Maximal degree in co-relation 31430. Up to 3717 conditions per place. [2024-06-27 20:31:05,073 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 196 selfloop transitions, 31 changer transitions 0/232 dead transitions. [2024-06-27 20:31:05,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 232 transitions, 2776 flow [2024-06-27 20:31:05,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:31:05,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:31:05,075 INFO L175 Difference]: Start difference. First operand has 151 places, 199 transitions, 2156 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:31:05,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 232 transitions, 2776 flow [2024-06-27 20:31:05,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 232 transitions, 2634 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:05,206 INFO L231 Difference]: Finished difference. Result has 155 places, 201 transitions, 2175 flow [2024-06-27 20:31:05,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2175, PETRI_PLACES=155, PETRI_TRANSITIONS=201} [2024-06-27 20:31:05,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:31:05,207 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 201 transitions, 2175 flow [2024-06-27 20:31:05,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:05,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:05,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:05,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:31:05,207 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 20:31:05,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:05,207 INFO L85 PathProgramCache]: Analyzing trace with hash 833239303, now seen corresponding path program 5 times [2024-06-27 20:31:05,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:05,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516118851] [2024-06-27 20:31:05,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:05,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:06,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:06,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516118851] [2024-06-27 20:31:06,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516118851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:06,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:06,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:06,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777243769] [2024-06-27 20:31:06,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:06,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:06,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:06,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:06,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 201 transitions, 2175 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:06,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:06,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:06,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:07,038 INFO L124 PetriNetUnfolderBase]: 2732/4091 cut-off events. [2024-06-27 20:31:07,038 INFO L125 PetriNetUnfolderBase]: For 227665/227669 co-relation queries the response was YES. [2024-06-27 20:31:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33170 conditions, 4091 events. 2732/4091 cut-off events. For 227665/227669 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19994 event pairs, 603 based on Foata normal form. 7/4097 useless extension candidates. Maximal degree in co-relation 33098. Up to 3269 conditions per place. [2024-06-27 20:31:07,071 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 164 selfloop transitions, 85 changer transitions 0/254 dead transitions. [2024-06-27 20:31:07,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 254 transitions, 3555 flow [2024-06-27 20:31:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:07,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:31:07,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-27 20:31:07,072 INFO L175 Difference]: Start difference. First operand has 155 places, 201 transitions, 2175 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:31:07,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 254 transitions, 3555 flow [2024-06-27 20:31:07,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 254 transitions, 3412 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:07,214 INFO L231 Difference]: Finished difference. Result has 158 places, 209 transitions, 2416 flow [2024-06-27 20:31:07,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2416, PETRI_PLACES=158, PETRI_TRANSITIONS=209} [2024-06-27 20:31:07,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-27 20:31:07,215 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 209 transitions, 2416 flow [2024-06-27 20:31:07,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:07,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:07,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:31:07,216 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 20:31:07,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1376086651, now seen corresponding path program 1 times [2024-06-27 20:31:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056722367] [2024-06-27 20:31:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:08,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:08,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056722367] [2024-06-27 20:31:08,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056722367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:08,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:08,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:08,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467626811] [2024-06-27 20:31:08,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:08,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:08,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:08,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:08,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:08,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 209 transitions, 2416 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:08,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:08,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:08,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:09,128 INFO L124 PetriNetUnfolderBase]: 2755/4130 cut-off events. [2024-06-27 20:31:09,128 INFO L125 PetriNetUnfolderBase]: For 243021/243025 co-relation queries the response was YES. [2024-06-27 20:31:09,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34600 conditions, 4130 events. 2755/4130 cut-off events. For 243021/243025 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20250 event pairs, 623 based on Foata normal form. 7/4136 useless extension candidates. Maximal degree in co-relation 34526. Up to 3789 conditions per place. [2024-06-27 20:31:09,164 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 200 selfloop transitions, 40 changer transitions 0/245 dead transitions. [2024-06-27 20:31:09,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 245 transitions, 3278 flow [2024-06-27 20:31:09,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:09,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:31:09,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:31:09,165 INFO L175 Difference]: Start difference. First operand has 158 places, 209 transitions, 2416 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:31:09,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 245 transitions, 3278 flow [2024-06-27 20:31:09,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 245 transitions, 3059 flow, removed 66 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:09,346 INFO L231 Difference]: Finished difference. Result has 161 places, 212 transitions, 2377 flow [2024-06-27 20:31:09,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2377, PETRI_PLACES=161, PETRI_TRANSITIONS=212} [2024-06-27 20:31:09,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-27 20:31:09,346 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 212 transitions, 2377 flow [2024-06-27 20:31:09,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:09,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:09,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:09,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:31:09,347 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 20:31:09,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1376093595, now seen corresponding path program 6 times [2024-06-27 20:31:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691535484] [2024-06-27 20:31:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:10,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:10,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691535484] [2024-06-27 20:31:10,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691535484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:10,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:10,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:10,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539723319] [2024-06-27 20:31:10,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:10,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:10,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:10,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:10,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:10,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 212 transitions, 2377 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:10,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:10,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:10,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:11,189 INFO L124 PetriNetUnfolderBase]: 2764/4141 cut-off events. [2024-06-27 20:31:11,189 INFO L125 PetriNetUnfolderBase]: For 248651/248655 co-relation queries the response was YES. [2024-06-27 20:31:11,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34646 conditions, 4141 events. 2764/4141 cut-off events. For 248651/248655 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 20297 event pairs, 600 based on Foata normal form. 7/4147 useless extension candidates. Maximal degree in co-relation 34570. Up to 3423 conditions per place. [2024-06-27 20:31:11,226 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 168 selfloop transitions, 84 changer transitions 0/257 dead transitions. [2024-06-27 20:31:11,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 257 transitions, 3438 flow [2024-06-27 20:31:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:11,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:31:11,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 20:31:11,228 INFO L175 Difference]: Start difference. First operand has 161 places, 212 transitions, 2377 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:31:11,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 257 transitions, 3438 flow [2024-06-27 20:31:11,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 257 transitions, 3284 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:11,433 INFO L231 Difference]: Finished difference. Result has 164 places, 216 transitions, 2505 flow [2024-06-27 20:31:11,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2505, PETRI_PLACES=164, PETRI_TRANSITIONS=216} [2024-06-27 20:31:11,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:31:11,433 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 216 transitions, 2505 flow [2024-06-27 20:31:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:11,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:11,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:11,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:31:11,434 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:11,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1741130063, now seen corresponding path program 1 times [2024-06-27 20:31:11,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:11,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486495612] [2024-06-27 20:31:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:11,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486495612] [2024-06-27 20:31:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486495612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:11,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:11,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267180933] [2024-06-27 20:31:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:11,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:11,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:12,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 216 transitions, 2505 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:31:12,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:12,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:12,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:12,676 INFO L124 PetriNetUnfolderBase]: 2605/3961 cut-off events. [2024-06-27 20:31:12,677 INFO L125 PetriNetUnfolderBase]: For 257757/257781 co-relation queries the response was YES. [2024-06-27 20:31:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34260 conditions, 3961 events. 2605/3961 cut-off events. For 257757/257781 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19899 event pairs, 673 based on Foata normal form. 2/3923 useless extension candidates. Maximal degree in co-relation 34183. Up to 3697 conditions per place. [2024-06-27 20:31:12,713 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 198 selfloop transitions, 22 changer transitions 0/237 dead transitions. [2024-06-27 20:31:12,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 237 transitions, 3150 flow [2024-06-27 20:31:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:12,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:12,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-27 20:31:12,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-27 20:31:12,715 INFO L175 Difference]: Start difference. First operand has 164 places, 216 transitions, 2505 flow. Second operand 6 states and 115 transitions. [2024-06-27 20:31:12,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 237 transitions, 3150 flow [2024-06-27 20:31:12,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 237 transitions, 2897 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:12,918 INFO L231 Difference]: Finished difference. Result has 163 places, 221 transitions, 2396 flow [2024-06-27 20:31:12,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2262, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2396, PETRI_PLACES=163, PETRI_TRANSITIONS=221} [2024-06-27 20:31:12,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 20:31:12,919 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 221 transitions, 2396 flow [2024-06-27 20:31:12,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:31:12,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:12,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:31:12,920 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 20:31:12,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1571480675, now seen corresponding path program 2 times [2024-06-27 20:31:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:12,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192273351] [2024-06-27 20:31:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:12,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:13,834 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 20:31:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:13,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192273351] [2024-06-27 20:31:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192273351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:13,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:13,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:13,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646688106] [2024-06-27 20:31:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:13,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:13,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:13,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:13,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 221 transitions, 2396 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:13,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:13,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:13,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:14,732 INFO L124 PetriNetUnfolderBase]: 2794/4190 cut-off events. [2024-06-27 20:31:14,733 INFO L125 PetriNetUnfolderBase]: For 271922/271922 co-relation queries the response was YES. [2024-06-27 20:31:14,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 4190 events. 2794/4190 cut-off events. For 271922/271922 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 20610 event pairs, 682 based on Foata normal form. 6/4195 useless extension candidates. Maximal degree in co-relation 35077. Up to 3984 conditions per place. [2024-06-27 20:31:14,770 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 221 selfloop transitions, 24 changer transitions 0/250 dead transitions. [2024-06-27 20:31:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 250 transitions, 3120 flow [2024-06-27 20:31:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:31:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:31:14,771 INFO L175 Difference]: Start difference. First operand has 163 places, 221 transitions, 2396 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:31:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 250 transitions, 3120 flow [2024-06-27 20:31:14,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 250 transitions, 3065 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:31:14,977 INFO L231 Difference]: Finished difference. Result has 168 places, 224 transitions, 2495 flow [2024-06-27 20:31:14,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2341, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2495, PETRI_PLACES=168, PETRI_TRANSITIONS=224} [2024-06-27 20:31:14,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-27 20:31:14,977 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 224 transitions, 2495 flow [2024-06-27 20:31:14,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:14,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:14,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:14,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:31:14,978 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:14,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:14,978 INFO L85 PathProgramCache]: Analyzing trace with hash -595929013, now seen corresponding path program 4 times [2024-06-27 20:31:14,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:14,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746000748] [2024-06-27 20:31:14,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:14,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746000748] [2024-06-27 20:31:15,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746000748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:15,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:15,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:15,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577271288] [2024-06-27 20:31:15,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:15,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:15,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:15,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:15,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:16,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:16,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 224 transitions, 2495 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:16,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:16,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:16,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:16,958 INFO L124 PetriNetUnfolderBase]: 2786/4178 cut-off events. [2024-06-27 20:31:16,959 INFO L125 PetriNetUnfolderBase]: For 280175/280175 co-relation queries the response was YES. [2024-06-27 20:31:16,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35467 conditions, 4178 events. 2786/4178 cut-off events. For 280175/280175 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 20521 event pairs, 689 based on Foata normal form. 4/4181 useless extension candidates. Maximal degree in co-relation 35388. Up to 4005 conditions per place. [2024-06-27 20:31:16,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 19 changer transitions 0/254 dead transitions. [2024-06-27 20:31:16,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 254 transitions, 3165 flow [2024-06-27 20:31:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:16,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:16,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:31:16,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:31:16,990 INFO L175 Difference]: Start difference. First operand has 168 places, 224 transitions, 2495 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:31:16,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 254 transitions, 3165 flow [2024-06-27 20:31:17,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 254 transitions, 3035 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:17,156 INFO L231 Difference]: Finished difference. Result has 171 places, 226 transitions, 2516 flow [2024-06-27 20:31:17,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2516, PETRI_PLACES=171, PETRI_TRANSITIONS=226} [2024-06-27 20:31:17,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-27 20:31:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 226 transitions, 2516 flow [2024-06-27 20:31:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:17,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:17,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:31:17,157 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 20:31:17,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1343394951, now seen corresponding path program 7 times [2024-06-27 20:31:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880146001] [2024-06-27 20:31:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:17,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:18,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:18,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:18,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880146001] [2024-06-27 20:31:18,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880146001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:18,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:18,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:18,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035151512] [2024-06-27 20:31:18,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:18,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:18,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:18,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:18,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 226 transitions, 2516 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:18,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:18,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:18,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:19,059 INFO L124 PetriNetUnfolderBase]: 2823/4231 cut-off events. [2024-06-27 20:31:19,059 INFO L125 PetriNetUnfolderBase]: For 296461/296461 co-relation queries the response was YES. [2024-06-27 20:31:19,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36128 conditions, 4231 events. 2823/4231 cut-off events. For 296461/296461 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20863 event pairs, 666 based on Foata normal form. 6/4236 useless extension candidates. Maximal degree in co-relation 36048. Up to 3652 conditions per place. [2024-06-27 20:31:19,096 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 214 selfloop transitions, 62 changer transitions 0/281 dead transitions. [2024-06-27 20:31:19,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 281 transitions, 4108 flow [2024-06-27 20:31:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:31:19,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:31:19,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:31:19,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 20:31:19,097 INFO L175 Difference]: Start difference. First operand has 171 places, 226 transitions, 2516 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:31:19,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 281 transitions, 4108 flow [2024-06-27 20:31:19,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3975 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:19,306 INFO L231 Difference]: Finished difference. Result has 176 places, 237 transitions, 2811 flow [2024-06-27 20:31:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2811, PETRI_PLACES=176, PETRI_TRANSITIONS=237} [2024-06-27 20:31:19,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 20:31:19,307 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 237 transitions, 2811 flow [2024-06-27 20:31:19,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:19,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:19,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:31:19,308 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 20:31:19,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:19,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1343399601, now seen corresponding path program 8 times [2024-06-27 20:31:19,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870361013] [2024-06-27 20:31:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:20,192 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 20:31:20,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:20,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870361013] [2024-06-27 20:31:20,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870361013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:20,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:20,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:20,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517171080] [2024-06-27 20:31:20,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:20,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:20,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:20,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:20,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:20,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:20,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 237 transitions, 2811 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:20,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:20,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:20,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:21,131 INFO L124 PetriNetUnfolderBase]: 2858/4282 cut-off events. [2024-06-27 20:31:21,132 INFO L125 PetriNetUnfolderBase]: For 314325/314325 co-relation queries the response was YES. [2024-06-27 20:31:21,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37753 conditions, 4282 events. 2858/4282 cut-off events. For 314325/314325 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21097 event pairs, 674 based on Foata normal form. 6/4287 useless extension candidates. Maximal degree in co-relation 37670. Up to 3873 conditions per place. [2024-06-27 20:31:21,171 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 226 selfloop transitions, 44 changer transitions 0/275 dead transitions. [2024-06-27 20:31:21,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 275 transitions, 3816 flow [2024-06-27 20:31:21,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:21,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:31:21,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:31:21,172 INFO L175 Difference]: Start difference. First operand has 176 places, 237 transitions, 2811 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:31:21,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 275 transitions, 3816 flow [2024-06-27 20:31:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 275 transitions, 3559 flow, removed 97 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:21,433 INFO L231 Difference]: Finished difference. Result has 181 places, 241 transitions, 2788 flow [2024-06-27 20:31:21,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2788, PETRI_PLACES=181, PETRI_TRANSITIONS=241} [2024-06-27 20:31:21,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 20:31:21,434 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 241 transitions, 2788 flow [2024-06-27 20:31:21,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:21,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:21,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:21,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:31:21,434 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 20:31:21,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1571719685, now seen corresponding path program 3 times [2024-06-27 20:31:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:21,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672043239] [2024-06-27 20:31:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:21,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:22,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:22,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672043239] [2024-06-27 20:31:22,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672043239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:22,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:22,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:22,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629139490] [2024-06-27 20:31:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:22,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:22,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:22,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 241 transitions, 2788 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:23,326 INFO L124 PetriNetUnfolderBase]: 2887/4327 cut-off events. [2024-06-27 20:31:23,326 INFO L125 PetriNetUnfolderBase]: For 326373/326373 co-relation queries the response was YES. [2024-06-27 20:31:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38180 conditions, 4327 events. 2887/4327 cut-off events. For 326373/326373 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21364 event pairs, 682 based on Foata normal form. 6/4332 useless extension candidates. Maximal degree in co-relation 38095. Up to 4093 conditions per place. [2024-06-27 20:31:23,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 237 selfloop transitions, 28 changer transitions 0/270 dead transitions. [2024-06-27 20:31:23,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 270 transitions, 3574 flow [2024-06-27 20:31:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:31:23,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:31:23,374 INFO L175 Difference]: Start difference. First operand has 181 places, 241 transitions, 2788 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:31:23,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 270 transitions, 3574 flow [2024-06-27 20:31:23,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 270 transitions, 3403 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:23,612 INFO L231 Difference]: Finished difference. Result has 182 places, 244 transitions, 2795 flow [2024-06-27 20:31:23,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2617, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2795, PETRI_PLACES=182, PETRI_TRANSITIONS=244} [2024-06-27 20:31:23,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 20:31:23,613 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 244 transitions, 2795 flow [2024-06-27 20:31:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:23,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:23,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:31:23,613 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 20:31:23,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash -367850109, now seen corresponding path program 9 times [2024-06-27 20:31:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413578641] [2024-06-27 20:31:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:24,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:24,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413578641] [2024-06-27 20:31:24,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413578641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:24,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:24,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655425447] [2024-06-27 20:31:24,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:24,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:24,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:24,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:24,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:24,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:24,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 244 transitions, 2795 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:24,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:24,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:24,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:25,339 INFO L124 PetriNetUnfolderBase]: 2934/4395 cut-off events. [2024-06-27 20:31:25,339 INFO L125 PetriNetUnfolderBase]: For 343823/343823 co-relation queries the response was YES. [2024-06-27 20:31:25,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38994 conditions, 4395 events. 2934/4395 cut-off events. For 343823/343823 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21841 event pairs, 697 based on Foata normal form. 6/4400 useless extension candidates. Maximal degree in co-relation 38908. Up to 4088 conditions per place. [2024-06-27 20:31:25,381 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 238 selfloop transitions, 42 changer transitions 0/285 dead transitions. [2024-06-27 20:31:25,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 285 transitions, 3922 flow [2024-06-27 20:31:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:25,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:31:25,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:31:25,382 INFO L175 Difference]: Start difference. First operand has 182 places, 244 transitions, 2795 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:31:25,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 285 transitions, 3922 flow [2024-06-27 20:31:25,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 285 transitions, 3768 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:25,639 INFO L231 Difference]: Finished difference. Result has 186 places, 252 transitions, 2988 flow [2024-06-27 20:31:25,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2641, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2988, PETRI_PLACES=186, PETRI_TRANSITIONS=252} [2024-06-27 20:31:25,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 20:31:25,640 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 252 transitions, 2988 flow [2024-06-27 20:31:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:25,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:25,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:25,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:31:25,640 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 20:31:25,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash -595744315, now seen corresponding path program 4 times [2024-06-27 20:31:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:25,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829406551] [2024-06-27 20:31:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:25,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:26,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:26,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829406551] [2024-06-27 20:31:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829406551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:26,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:26,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102140658] [2024-06-27 20:31:26,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:26,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:26,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:26,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:26,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 252 transitions, 2988 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:26,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:26,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:26,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:27,600 INFO L124 PetriNetUnfolderBase]: 2961/4438 cut-off events. [2024-06-27 20:31:27,600 INFO L125 PetriNetUnfolderBase]: For 359293/359293 co-relation queries the response was YES. [2024-06-27 20:31:27,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39730 conditions, 4438 events. 2961/4438 cut-off events. For 359293/359293 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22055 event pairs, 696 based on Foata normal form. 6/4443 useless extension candidates. Maximal degree in co-relation 39642. Up to 4172 conditions per place. [2024-06-27 20:31:27,637 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 248 selfloop transitions, 30 changer transitions 0/283 dead transitions. [2024-06-27 20:31:27,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 283 transitions, 3908 flow [2024-06-27 20:31:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:27,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:31:27,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:31:27,639 INFO L175 Difference]: Start difference. First operand has 186 places, 252 transitions, 2988 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:31:27,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 283 transitions, 3908 flow [2024-06-27 20:31:27,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 283 transitions, 3763 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:27,899 INFO L231 Difference]: Finished difference. Result has 189 places, 255 transitions, 3033 flow [2024-06-27 20:31:27,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=189, PETRI_TRANSITIONS=255} [2024-06-27 20:31:27,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:31:27,900 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 255 transitions, 3033 flow [2024-06-27 20:31:27,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:27,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:27,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:27,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:31:27,900 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 20:31:27,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1343572581, now seen corresponding path program 10 times [2024-06-27 20:31:27,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:27,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700781958] [2024-06-27 20:31:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:27,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:28,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:28,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700781958] [2024-06-27 20:31:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700781958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:28,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255609895] [2024-06-27 20:31:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:28,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:28,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 255 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:28,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:28,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:28,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:29,762 INFO L124 PetriNetUnfolderBase]: 2965/4444 cut-off events. [2024-06-27 20:31:29,762 INFO L125 PetriNetUnfolderBase]: For 366962/366962 co-relation queries the response was YES. [2024-06-27 20:31:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39906 conditions, 4444 events. 2965/4444 cut-off events. For 366962/366962 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 22114 event pairs, 678 based on Foata normal form. 6/4449 useless extension candidates. Maximal degree in co-relation 39816. Up to 4035 conditions per place. [2024-06-27 20:31:29,807 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 242 selfloop transitions, 45 changer transitions 0/292 dead transitions. [2024-06-27 20:31:29,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 292 transitions, 4000 flow [2024-06-27 20:31:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:29,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:31:29,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:31:29,808 INFO L175 Difference]: Start difference. First operand has 189 places, 255 transitions, 3033 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:31:29,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 292 transitions, 4000 flow [2024-06-27 20:31:30,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 292 transitions, 3834 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:30,143 INFO L231 Difference]: Finished difference. Result has 192 places, 259 transitions, 3099 flow [2024-06-27 20:31:30,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2867, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3099, PETRI_PLACES=192, PETRI_TRANSITIONS=259} [2024-06-27 20:31:30,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 20:31:30,144 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 259 transitions, 3099 flow [2024-06-27 20:31:30,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:30,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:30,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:30,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:31:30,144 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:30,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:30,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1579754637, now seen corresponding path program 1 times [2024-06-27 20:31:30,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:30,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098525141] [2024-06-27 20:31:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:30,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:30,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:30,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098525141] [2024-06-27 20:31:30,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098525141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:30,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:30,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:30,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533011902] [2024-06-27 20:31:30,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:30,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:30,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:30,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:31,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:31,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 259 transitions, 3099 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:31,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:31,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:31,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:32,014 INFO L124 PetriNetUnfolderBase]: 2957/4432 cut-off events. [2024-06-27 20:31:32,015 INFO L125 PetriNetUnfolderBase]: For 369910/369910 co-relation queries the response was YES. [2024-06-27 20:31:32,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39858 conditions, 4432 events. 2957/4432 cut-off events. For 369910/369910 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22070 event pairs, 698 based on Foata normal form. 3/4434 useless extension candidates. Maximal degree in co-relation 39767. Up to 4172 conditions per place. [2024-06-27 20:31:32,062 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 38 changer transitions 0/285 dead transitions. [2024-06-27 20:31:32,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 285 transitions, 3819 flow [2024-06-27 20:31:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:31:32,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:31:32,063 INFO L175 Difference]: Start difference. First operand has 192 places, 259 transitions, 3099 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:31:32,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 285 transitions, 3819 flow [2024-06-27 20:31:32,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 285 transitions, 3554 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:32,429 INFO L231 Difference]: Finished difference. Result has 193 places, 259 transitions, 2924 flow [2024-06-27 20:31:32,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2924, PETRI_PLACES=193, PETRI_TRANSITIONS=259} [2024-06-27 20:31:32,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-27 20:31:32,430 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 259 transitions, 2924 flow [2024-06-27 20:31:32,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:32,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:32,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:32,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:31:32,430 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:32,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:32,430 INFO L85 PathProgramCache]: Analyzing trace with hash -359568955, now seen corresponding path program 5 times [2024-06-27 20:31:32,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:32,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471382515] [2024-06-27 20:31:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:32,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:33,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471382515] [2024-06-27 20:31:33,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471382515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:33,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:33,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109567460] [2024-06-27 20:31:33,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:33,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:33,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:33,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:33,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:33,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 259 transitions, 2924 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:33,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:33,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:33,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:34,425 INFO L124 PetriNetUnfolderBase]: 2960/4437 cut-off events. [2024-06-27 20:31:34,426 INFO L125 PetriNetUnfolderBase]: For 381716/381716 co-relation queries the response was YES. [2024-06-27 20:31:34,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39555 conditions, 4437 events. 2960/4437 cut-off events. For 381716/381716 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 22061 event pairs, 704 based on Foata normal form. 6/4442 useless extension candidates. Maximal degree in co-relation 39463. Up to 4172 conditions per place. [2024-06-27 20:31:34,475 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 36 changer transitions 0/288 dead transitions. [2024-06-27 20:31:34,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 288 transitions, 3774 flow [2024-06-27 20:31:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:31:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:31:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:31:34,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:31:34,477 INFO L175 Difference]: Start difference. First operand has 193 places, 259 transitions, 2924 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:31:34,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 288 transitions, 3774 flow [2024-06-27 20:31:34,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 288 transitions, 3692 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:34,842 INFO L231 Difference]: Finished difference. Result has 194 places, 262 transitions, 3056 flow [2024-06-27 20:31:34,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2842, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3056, PETRI_PLACES=194, PETRI_TRANSITIONS=262} [2024-06-27 20:31:34,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 20:31:34,843 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 262 transitions, 3056 flow [2024-06-27 20:31:34,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:34,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:34,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:34,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:31:34,843 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:34,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2026727183, now seen corresponding path program 2 times [2024-06-27 20:31:34,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:34,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621614950] [2024-06-27 20:31:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:35,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:35,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621614950] [2024-06-27 20:31:35,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621614950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:35,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:35,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:35,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648601408] [2024-06-27 20:31:35,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:35,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:35,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:35,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:35,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 262 transitions, 3056 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:31:35,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:35,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:35,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:36,221 INFO L124 PetriNetUnfolderBase]: 2764/4215 cut-off events. [2024-06-27 20:31:36,222 INFO L125 PetriNetUnfolderBase]: For 386160/386184 co-relation queries the response was YES. [2024-06-27 20:31:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38355 conditions, 4215 events. 2764/4215 cut-off events. For 386160/386184 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 21569 event pairs, 689 based on Foata normal form. 2/4177 useless extension candidates. Maximal degree in co-relation 38262. Up to 3952 conditions per place. [2024-06-27 20:31:36,277 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 13 changer transitions 0/271 dead transitions. [2024-06-27 20:31:36,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 271 transitions, 3576 flow [2024-06-27 20:31:36,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-27 20:31:36,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 20:31:36,278 INFO L175 Difference]: Start difference. First operand has 194 places, 262 transitions, 3056 flow. Second operand 6 states and 106 transitions. [2024-06-27 20:31:36,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 271 transitions, 3576 flow [2024-06-27 20:31:36,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 271 transitions, 3378 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:36,628 INFO L231 Difference]: Finished difference. Result has 194 places, 262 transitions, 2892 flow [2024-06-27 20:31:36,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2892, PETRI_PLACES=194, PETRI_TRANSITIONS=262} [2024-06-27 20:31:36,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 20:31:36,629 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 262 transitions, 2892 flow [2024-06-27 20:31:36,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 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 20:31:36,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:36,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:36,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:31:36,629 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:36,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:36,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1752356465, now seen corresponding path program 1 times [2024-06-27 20:31:36,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:36,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142583232] [2024-06-27 20:31:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:36,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:36,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:37,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:37,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142583232] [2024-06-27 20:31:37,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142583232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:37,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:37,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177121569] [2024-06-27 20:31:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:37,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:37,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:37,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 262 transitions, 2892 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:37,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:37,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:37,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:38,092 INFO L124 PetriNetUnfolderBase]: 2953/4428 cut-off events. [2024-06-27 20:31:38,093 INFO L125 PetriNetUnfolderBase]: For 397400/397400 co-relation queries the response was YES. [2024-06-27 20:31:38,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39615 conditions, 4428 events. 2953/4428 cut-off events. For 397400/397400 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21972 event pairs, 700 based on Foata normal form. 3/4430 useless extension candidates. Maximal degree in co-relation 39521. Up to 4254 conditions per place. [2024-06-27 20:31:38,137 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 249 selfloop transitions, 24 changer transitions 0/278 dead transitions. [2024-06-27 20:31:38,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 278 transitions, 3612 flow [2024-06-27 20:31:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:38,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 20:31:38,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:31:38,138 INFO L175 Difference]: Start difference. First operand has 194 places, 262 transitions, 2892 flow. Second operand 6 states and 111 transitions. [2024-06-27 20:31:38,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 278 transitions, 3612 flow [2024-06-27 20:31:38,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 278 transitions, 3568 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:38,428 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 2953 flow [2024-06-27 20:31:38,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2953, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-06-27 20:31:38,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:31:38,428 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 2953 flow [2024-06-27 20:31:38,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:38,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:38,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:38,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:31:38,429 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:38,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2026721231, now seen corresponding path program 2 times [2024-06-27 20:31:38,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:38,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680160929] [2024-06-27 20:31:38,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:38,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680160929] [2024-06-27 20:31:38,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680160929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:38,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:38,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:31:38,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471113952] [2024-06-27 20:31:38,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:31:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:31:38,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:31:38,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:38,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 2953 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:38,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:38,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:38,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:39,810 INFO L124 PetriNetUnfolderBase]: 2918/4375 cut-off events. [2024-06-27 20:31:39,810 INFO L125 PetriNetUnfolderBase]: For 407096/407100 co-relation queries the response was YES. [2024-06-27 20:31:39,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39502 conditions, 4375 events. 2918/4375 cut-off events. For 407096/407100 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21633 event pairs, 721 based on Foata normal form. 2/4376 useless extension candidates. Maximal degree in co-relation 39407. Up to 4203 conditions per place. [2024-06-27 20:31:39,856 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 244 selfloop transitions, 25 changer transitions 0/274 dead transitions. [2024-06-27 20:31:39,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 274 transitions, 3513 flow [2024-06-27 20:31:39,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:31:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:31:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:31:39,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:31:39,857 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 2953 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:31:39,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 274 transitions, 3513 flow [2024-06-27 20:31:40,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 274 transitions, 3465 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:31:40,250 INFO L231 Difference]: Finished difference. Result has 197 places, 265 transitions, 2961 flow [2024-06-27 20:31:40,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2905, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2961, PETRI_PLACES=197, PETRI_TRANSITIONS=265} [2024-06-27 20:31:40,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 20:31:40,251 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 265 transitions, 2961 flow [2024-06-27 20:31:40,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:40,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:40,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:40,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:31:40,251 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 20:31:40,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:40,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2043694165, now seen corresponding path program 1 times [2024-06-27 20:31:40,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:40,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858574260] [2024-06-27 20:31:40,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858574260] [2024-06-27 20:31:40,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858574260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:40,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:40,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:31:40,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10645099] [2024-06-27 20:31:40,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:40,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:31:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:31:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:31:40,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:40,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 265 transitions, 2961 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:40,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:40,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:40,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:41,786 INFO L124 PetriNetUnfolderBase]: 2884/4314 cut-off events. [2024-06-27 20:31:41,786 INFO L125 PetriNetUnfolderBase]: For 415301/415324 co-relation queries the response was YES. [2024-06-27 20:31:41,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39241 conditions, 4314 events. 2884/4314 cut-off events. For 415301/415324 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21252 event pairs, 728 based on Foata normal form. 3/4279 useless extension candidates. Maximal degree in co-relation 39145. Up to 4152 conditions per place. [2024-06-27 20:31:41,833 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 246 selfloop transitions, 14 changer transitions 0/280 dead transitions. [2024-06-27 20:31:41,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 280 transitions, 3543 flow [2024-06-27 20:31:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:31:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:31:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:31:41,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:31:41,834 INFO L175 Difference]: Start difference. First operand has 197 places, 265 transitions, 2961 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:31:41,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 280 transitions, 3543 flow [2024-06-27 20:31:42,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 280 transitions, 3477 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:42,172 INFO L231 Difference]: Finished difference. Result has 199 places, 268 transitions, 2969 flow [2024-06-27 20:31:42,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2969, PETRI_PLACES=199, PETRI_TRANSITIONS=268} [2024-06-27 20:31:42,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 20:31:42,173 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 268 transitions, 2969 flow [2024-06-27 20:31:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:42,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:42,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:42,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:31:42,173 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:42,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:42,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1804181813, now seen corresponding path program 1 times [2024-06-27 20:31:42,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191529329] [2024-06-27 20:31:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:42,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191529329] [2024-06-27 20:31:43,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191529329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:43,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235527614] [2024-06-27 20:31:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:43,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:43,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:43,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:43,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 268 transitions, 2969 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:43,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:43,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:43,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:44,386 INFO L124 PetriNetUnfolderBase]: 3279/4908 cut-off events. [2024-06-27 20:31:44,386 INFO L125 PetriNetUnfolderBase]: For 510215/510215 co-relation queries the response was YES. [2024-06-27 20:31:44,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47279 conditions, 4908 events. 3279/4908 cut-off events. For 510215/510215 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 25129 event pairs, 687 based on Foata normal form. 24/4911 useless extension candidates. Maximal degree in co-relation 47182. Up to 3879 conditions per place. [2024-06-27 20:31:44,439 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 278 selfloop transitions, 57 changer transitions 0/340 dead transitions. [2024-06-27 20:31:44,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 340 transitions, 4715 flow [2024-06-27 20:31:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:31:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:31:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 20:31:44,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 20:31:44,441 INFO L175 Difference]: Start difference. First operand has 199 places, 268 transitions, 2969 flow. Second operand 11 states and 225 transitions. [2024-06-27 20:31:44,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 340 transitions, 4715 flow [2024-06-27 20:31:44,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 340 transitions, 4663 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:45,003 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 3298 flow [2024-06-27 20:31:45,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2917, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3298, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-06-27 20:31:45,003 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 20:31:45,003 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 3298 flow [2024-06-27 20:31:45,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:45,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:45,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:45,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:31:45,004 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:45,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:45,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1804095323, now seen corresponding path program 2 times [2024-06-27 20:31:45,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:45,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822675261] [2024-06-27 20:31:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:45,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:45,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:46,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:46,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822675261] [2024-06-27 20:31:46,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822675261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:46,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:46,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:46,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636080054] [2024-06-27 20:31:46,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:46,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:46,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:46,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:46,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:46,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:46,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 3298 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:46,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:46,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:46,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:47,424 INFO L124 PetriNetUnfolderBase]: 3558/5379 cut-off events. [2024-06-27 20:31:47,425 INFO L125 PetriNetUnfolderBase]: For 609063/609063 co-relation queries the response was YES. [2024-06-27 20:31:47,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54302 conditions, 5379 events. 3558/5379 cut-off events. For 609063/609063 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 28601 event pairs, 915 based on Foata normal form. 24/5392 useless extension candidates. Maximal degree in co-relation 54202. Up to 4541 conditions per place. [2024-06-27 20:31:47,489 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 282 selfloop transitions, 56 changer transitions 0/343 dead transitions. [2024-06-27 20:31:47,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 343 transitions, 4977 flow [2024-06-27 20:31:47,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:31:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:31:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-27 20:31:47,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48268398268398266 [2024-06-27 20:31:47,491 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 3298 flow. Second operand 11 states and 223 transitions. [2024-06-27 20:31:47,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 343 transitions, 4977 flow [2024-06-27 20:31:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 343 transitions, 4794 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:48,035 INFO L231 Difference]: Finished difference. Result has 213 places, 279 transitions, 3445 flow [2024-06-27 20:31:48,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3445, PETRI_PLACES=213, PETRI_TRANSITIONS=279} [2024-06-27 20:31:48,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:31:48,036 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 279 transitions, 3445 flow [2024-06-27 20:31:48,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:48,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:48,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:48,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:31:48,036 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:48,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:48,037 INFO L85 PathProgramCache]: Analyzing trace with hash 694865077, now seen corresponding path program 3 times [2024-06-27 20:31:48,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:48,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339240379] [2024-06-27 20:31:48,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:48,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:49,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339240379] [2024-06-27 20:31:49,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339240379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:49,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188662415] [2024-06-27 20:31:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:49,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:49,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:49,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 279 transitions, 3445 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:49,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:49,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:50,326 INFO L124 PetriNetUnfolderBase]: 3571/5402 cut-off events. [2024-06-27 20:31:50,326 INFO L125 PetriNetUnfolderBase]: For 618634/618634 co-relation queries the response was YES. [2024-06-27 20:31:50,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53619 conditions, 5402 events. 3571/5402 cut-off events. For 618634/618634 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 28663 event pairs, 930 based on Foata normal form. 30/5421 useless extension candidates. Maximal degree in co-relation 53516. Up to 4843 conditions per place. [2024-06-27 20:31:50,383 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 277 selfloop transitions, 56 changer transitions 0/338 dead transitions. [2024-06-27 20:31:50,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 338 transitions, 4736 flow [2024-06-27 20:31:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:31:50,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:31:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 20:31:50,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 20:31:50,384 INFO L175 Difference]: Start difference. First operand has 213 places, 279 transitions, 3445 flow. Second operand 11 states and 219 transitions. [2024-06-27 20:31:50,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 338 transitions, 4736 flow [2024-06-27 20:31:51,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 338 transitions, 4557 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:51,058 INFO L231 Difference]: Finished difference. Result has 217 places, 281 transitions, 3510 flow [2024-06-27 20:31:51,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3510, PETRI_PLACES=217, PETRI_TRANSITIONS=281} [2024-06-27 20:31:51,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 20:31:51,059 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 281 transitions, 3510 flow [2024-06-27 20:31:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:51,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:31:51,060 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:51,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash 781553167, now seen corresponding path program 4 times [2024-06-27 20:31:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851768543] [2024-06-27 20:31:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851768543] [2024-06-27 20:31:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851768543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:52,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959150585] [2024-06-27 20:31:52,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:52,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:52,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 281 transitions, 3510 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:52,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:52,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:52,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:53,532 INFO L124 PetriNetUnfolderBase]: 3795/5776 cut-off events. [2024-06-27 20:31:53,533 INFO L125 PetriNetUnfolderBase]: For 668273/668273 co-relation queries the response was YES. [2024-06-27 20:31:53,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58373 conditions, 5776 events. 3795/5776 cut-off events. For 668273/668273 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31454 event pairs, 981 based on Foata normal form. 24/5794 useless extension candidates. Maximal degree in co-relation 58268. Up to 4785 conditions per place. [2024-06-27 20:31:53,600 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 292 selfloop transitions, 45 changer transitions 0/342 dead transitions. [2024-06-27 20:31:53,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 342 transitions, 5124 flow [2024-06-27 20:31:53,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:31:53,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:31:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 20:31:53,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:31:53,601 INFO L175 Difference]: Start difference. First operand has 217 places, 281 transitions, 3510 flow. Second operand 10 states and 200 transitions. [2024-06-27 20:31:53,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 342 transitions, 5124 flow [2024-06-27 20:31:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 342 transitions, 4932 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 20:31:54,413 INFO L231 Difference]: Finished difference. Result has 219 places, 286 transitions, 3666 flow [2024-06-27 20:31:54,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3666, PETRI_PLACES=219, PETRI_TRANSITIONS=286} [2024-06-27 20:31:54,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 20:31:54,413 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 286 transitions, 3666 flow [2024-06-27 20:31:54,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:54,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:54,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:31:54,414 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:54,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:54,414 INFO L85 PathProgramCache]: Analyzing trace with hash 781556887, now seen corresponding path program 5 times [2024-06-27 20:31:54,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391342090] [2024-06-27 20:31:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:54,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:55,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391342090] [2024-06-27 20:31:55,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391342090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:55,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:55,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:55,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172231200] [2024-06-27 20:31:55,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:55,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:55,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:55,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:55,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:55,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 286 transitions, 3666 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:55,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:55,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:55,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:56,990 INFO L124 PetriNetUnfolderBase]: 3818/5817 cut-off events. [2024-06-27 20:31:56,990 INFO L125 PetriNetUnfolderBase]: For 690675/690675 co-relation queries the response was YES. [2024-06-27 20:31:57,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56586 conditions, 5817 events. 3818/5817 cut-off events. For 690675/690675 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31649 event pairs, 970 based on Foata normal form. 54/5865 useless extension candidates. Maximal degree in co-relation 56479. Up to 5176 conditions per place. [2024-06-27 20:31:57,057 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 289 selfloop transitions, 49 changer transitions 0/343 dead transitions. [2024-06-27 20:31:57,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 343 transitions, 4908 flow [2024-06-27 20:31:57,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:31:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:31:57,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:31:57,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-27 20:31:57,058 INFO L175 Difference]: Start difference. First operand has 219 places, 286 transitions, 3666 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:31:57,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 343 transitions, 4908 flow [2024-06-27 20:31:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 343 transitions, 4728 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:57,835 INFO L231 Difference]: Finished difference. Result has 224 places, 289 transitions, 3761 flow [2024-06-27 20:31:57,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3761, PETRI_PLACES=224, PETRI_TRANSITIONS=289} [2024-06-27 20:31:57,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 20:31:57,836 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 289 transitions, 3761 flow [2024-06-27 20:31:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:57,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:57,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:57,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:31:57,836 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 20:31:57,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:57,837 INFO L85 PathProgramCache]: Analyzing trace with hash 60765963, now seen corresponding path program 1 times [2024-06-27 20:31:57,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:57,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415919774] [2024-06-27 20:31:57,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:57,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415919774] [2024-06-27 20:31:58,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415919774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:58,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:58,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:31:58,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233105319] [2024-06-27 20:31:58,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:58,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:31:58,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:31:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:31:59,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:31:59,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 289 transitions, 3761 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:59,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:59,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:31:59,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:00,223 INFO L124 PetriNetUnfolderBase]: 3848/5870 cut-off events. [2024-06-27 20:32:00,223 INFO L125 PetriNetUnfolderBase]: For 621434/621438 co-relation queries the response was YES. [2024-06-27 20:32:00,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56847 conditions, 5870 events. 3848/5870 cut-off events. For 621434/621438 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 31986 event pairs, 893 based on Foata normal form. 7/5876 useless extension candidates. Maximal degree in co-relation 56738. Up to 5224 conditions per place. [2024-06-27 20:32:00,294 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 249 selfloop transitions, 76 changer transitions 0/330 dead transitions. [2024-06-27 20:32:00,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 330 transitions, 4989 flow [2024-06-27 20:32:00,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:00,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:00,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 20:32:00,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:32:00,295 INFO L175 Difference]: Start difference. First operand has 224 places, 289 transitions, 3761 flow. Second operand 9 states and 180 transitions. [2024-06-27 20:32:00,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 330 transitions, 4989 flow [2024-06-27 20:32:00,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 330 transitions, 4805 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-27 20:32:00,917 INFO L231 Difference]: Finished difference. Result has 224 places, 292 transitions, 3879 flow [2024-06-27 20:32:00,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3577, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3879, PETRI_PLACES=224, PETRI_TRANSITIONS=292} [2024-06-27 20:32:00,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-27 20:32:00,917 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 292 transitions, 3879 flow [2024-06-27 20:32:00,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:00,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:00,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:00,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:32:00,917 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 20:32:00,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 285410379, now seen corresponding path program 6 times [2024-06-27 20:32:00,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968015152] [2024-06-27 20:32:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968015152] [2024-06-27 20:32:01,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968015152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:01,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:01,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627892234] [2024-06-27 20:32:01,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:01,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:02,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:02,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 292 transitions, 3879 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:02,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:02,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:02,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:03,295 INFO L124 PetriNetUnfolderBase]: 3972/6074 cut-off events. [2024-06-27 20:32:03,295 INFO L125 PetriNetUnfolderBase]: For 696419/696423 co-relation queries the response was YES. [2024-06-27 20:32:03,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58124 conditions, 6074 events. 3972/6074 cut-off events. For 696419/696423 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 33574 event pairs, 912 based on Foata normal form. 31/6104 useless extension candidates. Maximal degree in co-relation 58014. Up to 5188 conditions per place. [2024-06-27 20:32:03,372 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 243 selfloop transitions, 93 changer transitions 0/341 dead transitions. [2024-06-27 20:32:03,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 341 transitions, 5181 flow [2024-06-27 20:32:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:32:03,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:32:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:32:03,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-27 20:32:03,373 INFO L175 Difference]: Start difference. First operand has 224 places, 292 transitions, 3879 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:32:03,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 341 transitions, 5181 flow [2024-06-27 20:32:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 4901 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:04,276 INFO L231 Difference]: Finished difference. Result has 227 places, 294 transitions, 3925 flow [2024-06-27 20:32:04,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3599, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3925, PETRI_PLACES=227, PETRI_TRANSITIONS=294} [2024-06-27 20:32:04,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 20:32:04,277 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 294 transitions, 3925 flow [2024-06-27 20:32:04,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:04,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:04,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:32:04,277 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 20:32:04,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 285262509, now seen corresponding path program 7 times [2024-06-27 20:32:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:04,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193651626] [2024-06-27 20:32:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:05,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193651626] [2024-06-27 20:32:05,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193651626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:05,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:05,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:05,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496338410] [2024-06-27 20:32:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:05,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:05,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:05,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:05,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 294 transitions, 3925 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:05,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:05,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:05,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:07,269 INFO L124 PetriNetUnfolderBase]: 4319/6621 cut-off events. [2024-06-27 20:32:07,269 INFO L125 PetriNetUnfolderBase]: For 786183/786187 co-relation queries the response was YES. [2024-06-27 20:32:07,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66172 conditions, 6621 events. 4319/6621 cut-off events. For 786183/786187 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 37451 event pairs, 1005 based on Foata normal form. 25/6645 useless extension candidates. Maximal degree in co-relation 66061. Up to 4735 conditions per place. [2024-06-27 20:32:07,341 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 236 selfloop transitions, 113 changer transitions 0/354 dead transitions. [2024-06-27 20:32:07,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 354 transitions, 5769 flow [2024-06-27 20:32:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 20:32:07,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-27 20:32:07,342 INFO L175 Difference]: Start difference. First operand has 227 places, 294 transitions, 3925 flow. Second operand 9 states and 191 transitions. [2024-06-27 20:32:07,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 354 transitions, 5769 flow [2024-06-27 20:32:08,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 354 transitions, 5489 flow, removed 49 selfloop flow, removed 8 redundant places. [2024-06-27 20:32:08,252 INFO L231 Difference]: Finished difference. Result has 230 places, 304 transitions, 4257 flow [2024-06-27 20:32:08,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4257, PETRI_PLACES=230, PETRI_TRANSITIONS=304} [2024-06-27 20:32:08,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 20:32:08,252 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 304 transitions, 4257 flow [2024-06-27 20:32:08,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:08,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:08,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:32:08,253 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:08,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash 285266229, now seen corresponding path program 8 times [2024-06-27 20:32:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:08,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527484219] [2024-06-27 20:32:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:08,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:09,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:09,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527484219] [2024-06-27 20:32:09,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527484219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:09,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:09,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428054736] [2024-06-27 20:32:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:09,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:09,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:09,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 304 transitions, 4257 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:09,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:09,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:09,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:10,865 INFO L124 PetriNetUnfolderBase]: 4437/6819 cut-off events. [2024-06-27 20:32:10,866 INFO L125 PetriNetUnfolderBase]: For 846673/846677 co-relation queries the response was YES. [2024-06-27 20:32:10,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68563 conditions, 6819 events. 4437/6819 cut-off events. For 846673/846677 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39048 event pairs, 1071 based on Foata normal form. 31/6849 useless extension candidates. Maximal degree in co-relation 68449. Up to 5832 conditions per place. [2024-06-27 20:32:10,967 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 249 selfloop transitions, 104 changer transitions 0/358 dead transitions. [2024-06-27 20:32:10,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 358 transitions, 5746 flow [2024-06-27 20:32:10,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:32:10,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:32:10,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:32:10,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:32:10,968 INFO L175 Difference]: Start difference. First operand has 230 places, 304 transitions, 4257 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:32:10,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 358 transitions, 5746 flow [2024-06-27 20:32:12,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 358 transitions, 5529 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:12,193 INFO L231 Difference]: Finished difference. Result has 237 places, 306 transitions, 4397 flow [2024-06-27 20:32:12,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4044, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4397, PETRI_PLACES=237, PETRI_TRANSITIONS=306} [2024-06-27 20:32:12,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:32:12,194 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 306 transitions, 4397 flow [2024-06-27 20:32:12,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:12,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:12,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:12,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:32:12,194 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:12,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:12,195 INFO L85 PathProgramCache]: Analyzing trace with hash 290980521, now seen corresponding path program 2 times [2024-06-27 20:32:12,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:12,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124473597] [2024-06-27 20:32:12,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:12,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:13,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124473597] [2024-06-27 20:32:13,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124473597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:13,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95593288] [2024-06-27 20:32:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:13,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:13,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 306 transitions, 4397 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:13,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:13,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:13,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:14,562 INFO L124 PetriNetUnfolderBase]: 4440/6824 cut-off events. [2024-06-27 20:32:14,562 INFO L125 PetriNetUnfolderBase]: For 801606/801610 co-relation queries the response was YES. [2024-06-27 20:32:14,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68321 conditions, 6824 events. 4440/6824 cut-off events. For 801606/801610 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 39107 event pairs, 1057 based on Foata normal form. 7/6830 useless extension candidates. Maximal degree in co-relation 68205. Up to 6178 conditions per place. [2024-06-27 20:32:14,650 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 81 changer transitions 0/346 dead transitions. [2024-06-27 20:32:14,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 346 transitions, 5572 flow [2024-06-27 20:32:14,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:32:14,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 20:32:14,651 INFO L175 Difference]: Start difference. First operand has 237 places, 306 transitions, 4397 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:32:14,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 346 transitions, 5572 flow [2024-06-27 20:32:15,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 5268 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-06-27 20:32:15,724 INFO L231 Difference]: Finished difference. Result has 237 places, 309 transitions, 4420 flow [2024-06-27 20:32:15,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4420, PETRI_PLACES=237, PETRI_TRANSITIONS=309} [2024-06-27 20:32:15,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 20:32:15,725 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 309 transitions, 4420 flow [2024-06-27 20:32:15,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:15,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:15,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:15,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:32:15,725 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:15,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:15,726 INFO L85 PathProgramCache]: Analyzing trace with hash 290772759, now seen corresponding path program 9 times [2024-06-27 20:32:15,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:15,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370044515] [2024-06-27 20:32:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:15,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:16,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370044515] [2024-06-27 20:32:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370044515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014619962] [2024-06-27 20:32:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:16,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:16,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:16,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:16,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:16,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:16,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 309 transitions, 4420 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:16,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:16,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:16,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:18,245 INFO L124 PetriNetUnfolderBase]: 4514/6950 cut-off events. [2024-06-27 20:32:18,245 INFO L125 PetriNetUnfolderBase]: For 841539/841543 co-relation queries the response was YES. [2024-06-27 20:32:18,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68627 conditions, 6950 events. 4514/6950 cut-off events. For 841539/841543 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40071 event pairs, 1080 based on Foata normal form. 31/6980 useless extension candidates. Maximal degree in co-relation 68510. Up to 6064 conditions per place. [2024-06-27 20:32:18,330 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 254 selfloop transitions, 98 changer transitions 0/357 dead transitions. [2024-06-27 20:32:18,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 357 transitions, 5665 flow [2024-06-27 20:32:18,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:32:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:32:18,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:32:18,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-27 20:32:18,331 INFO L175 Difference]: Start difference. First operand has 237 places, 309 transitions, 4420 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:32:18,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 357 transitions, 5665 flow [2024-06-27 20:32:19,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 357 transitions, 5365 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:19,111 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 4469 flow [2024-06-27 20:32:19,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4469, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-27 20:32:19,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 20:32:19,111 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 4469 flow [2024-06-27 20:32:19,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:19,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:19,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:19,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:32:19,112 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:19,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:19,112 INFO L85 PathProgramCache]: Analyzing trace with hash 290987961, now seen corresponding path program 3 times [2024-06-27 20:32:19,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:19,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008221782] [2024-06-27 20:32:19,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:19,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:20,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:20,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008221782] [2024-06-27 20:32:20,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008221782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:20,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:20,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:20,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119747052] [2024-06-27 20:32:20,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:20,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:20,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:20,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:20,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 4469 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:20,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:20,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:20,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:21,785 INFO L124 PetriNetUnfolderBase]: 4542/6994 cut-off events. [2024-06-27 20:32:21,785 INFO L125 PetriNetUnfolderBase]: For 835243/835247 co-relation queries the response was YES. [2024-06-27 20:32:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69376 conditions, 6994 events. 4542/6994 cut-off events. For 835243/835247 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40432 event pairs, 1028 based on Foata normal form. 7/7000 useless extension candidates. Maximal degree in co-relation 69258. Up to 6236 conditions per place. [2024-06-27 20:32:21,879 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 257 selfloop transitions, 92 changer transitions 0/354 dead transitions. [2024-06-27 20:32:21,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 354 transitions, 5734 flow [2024-06-27 20:32:21,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:21,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 20:32:21,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-27 20:32:21,880 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 4469 flow. Second operand 9 states and 179 transitions. [2024-06-27 20:32:21,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 354 transitions, 5734 flow [2024-06-27 20:32:22,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 354 transitions, 5434 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:32:22,866 INFO L231 Difference]: Finished difference. Result has 242 places, 317 transitions, 4606 flow [2024-06-27 20:32:22,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4169, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4606, PETRI_PLACES=242, PETRI_TRANSITIONS=317} [2024-06-27 20:32:22,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 20:32:22,867 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 317 transitions, 4606 flow [2024-06-27 20:32:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:22,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:22,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:22,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:32:22,868 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 20:32:22,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1057596421, now seen corresponding path program 1 times [2024-06-27 20:32:22,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:22,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208697595] [2024-06-27 20:32:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:22,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:23,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:23,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208697595] [2024-06-27 20:32:23,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208697595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:23,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:23,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:32:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846336568] [2024-06-27 20:32:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:32:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:23,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:32:23,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:32:23,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:23,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 317 transitions, 4606 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:23,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:23,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:23,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:24,797 INFO L124 PetriNetUnfolderBase]: 4512/6936 cut-off events. [2024-06-27 20:32:24,797 INFO L125 PetriNetUnfolderBase]: For 814134/814157 co-relation queries the response was YES. [2024-06-27 20:32:24,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68755 conditions, 6936 events. 4512/6936 cut-off events. For 814134/814157 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 40067 event pairs, 1256 based on Foata normal form. 2/6887 useless extension candidates. Maximal degree in co-relation 68635. Up to 6733 conditions per place. [2024-06-27 20:32:24,881 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 28 changer transitions 0/340 dead transitions. [2024-06-27 20:32:24,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 340 transitions, 5508 flow [2024-06-27 20:32:24,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:32:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:32:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:32:24,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-27 20:32:24,882 INFO L175 Difference]: Start difference. First operand has 242 places, 317 transitions, 4606 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:32:24,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 340 transitions, 5508 flow [2024-06-27 20:32:25,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 5212 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:25,886 INFO L231 Difference]: Finished difference. Result has 244 places, 323 transitions, 4471 flow [2024-06-27 20:32:25,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4310, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4471, PETRI_PLACES=244, PETRI_TRANSITIONS=323} [2024-06-27 20:32:25,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 20:32:25,886 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 323 transitions, 4471 flow [2024-06-27 20:32:25,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:25,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:25,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:25,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:32:25,887 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:25,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:25,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1471052601, now seen corresponding path program 4 times [2024-06-27 20:32:25,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:25,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127334204] [2024-06-27 20:32:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:25,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:26,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:26,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127334204] [2024-06-27 20:32:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127334204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:26,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:26,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:26,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556100850] [2024-06-27 20:32:26,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:26,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:26,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:27,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:27,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 323 transitions, 4471 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:27,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:27,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:27,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:28,530 INFO L124 PetriNetUnfolderBase]: 4586/7055 cut-off events. [2024-06-27 20:32:28,530 INFO L125 PetriNetUnfolderBase]: For 855371/855371 co-relation queries the response was YES. [2024-06-27 20:32:28,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69749 conditions, 7055 events. 4586/7055 cut-off events. For 855371/855371 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 40784 event pairs, 1212 based on Foata normal form. 6/7060 useless extension candidates. Maximal degree in co-relation 69627. Up to 6820 conditions per place. [2024-06-27 20:32:28,625 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 318 selfloop transitions, 31 changer transitions 0/356 dead transitions. [2024-06-27 20:32:28,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 356 transitions, 5413 flow [2024-06-27 20:32:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:28,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:32:28,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:28,626 INFO L175 Difference]: Start difference. First operand has 244 places, 323 transitions, 4471 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:32:28,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 356 transitions, 5413 flow [2024-06-27 20:32:29,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 356 transitions, 5334 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:29,705 INFO L231 Difference]: Finished difference. Result has 249 places, 326 transitions, 4634 flow [2024-06-27 20:32:29,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4634, PETRI_PLACES=249, PETRI_TRANSITIONS=326} [2024-06-27 20:32:29,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-27 20:32:29,706 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 326 transitions, 4634 flow [2024-06-27 20:32:29,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:29,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:29,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:29,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:32:29,706 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:29,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:29,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1481764955, now seen corresponding path program 5 times [2024-06-27 20:32:29,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:29,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633272027] [2024-06-27 20:32:29,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:29,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:30,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:30,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633272027] [2024-06-27 20:32:30,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633272027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:30,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:30,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248882633] [2024-06-27 20:32:30,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:30,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:30,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 326 transitions, 4634 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:30,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:32,353 INFO L124 PetriNetUnfolderBase]: 4613/7096 cut-off events. [2024-06-27 20:32:32,353 INFO L125 PetriNetUnfolderBase]: For 887635/887635 co-relation queries the response was YES. [2024-06-27 20:32:32,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70656 conditions, 7096 events. 4613/7096 cut-off events. For 887635/887635 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41013 event pairs, 1217 based on Foata normal form. 6/7101 useless extension candidates. Maximal degree in co-relation 70533. Up to 6804 conditions per place. [2024-06-27 20:32:32,432 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 316 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-27 20:32:32,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 359 transitions, 5586 flow [2024-06-27 20:32:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:32:32,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:32:32,433 INFO L175 Difference]: Start difference. First operand has 249 places, 326 transitions, 4634 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:32:32,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 359 transitions, 5586 flow [2024-06-27 20:32:33,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 359 transitions, 5368 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:33,376 INFO L231 Difference]: Finished difference. Result has 251 places, 329 transitions, 4674 flow [2024-06-27 20:32:33,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4674, PETRI_PLACES=251, PETRI_TRANSITIONS=329} [2024-06-27 20:32:33,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-27 20:32:33,377 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 329 transitions, 4674 flow [2024-06-27 20:32:33,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:33,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:33,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:33,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:32:33,377 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:33,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1304278133, now seen corresponding path program 6 times [2024-06-27 20:32:33,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309091785] [2024-06-27 20:32:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:33,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:34,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:34,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309091785] [2024-06-27 20:32:34,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309091785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:34,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:34,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:34,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132222566] [2024-06-27 20:32:34,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:34,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:34,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:34,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:34,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:34,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 329 transitions, 4674 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:34,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:34,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:34,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:36,052 INFO L124 PetriNetUnfolderBase]: 4641/7140 cut-off events. [2024-06-27 20:32:36,052 INFO L125 PetriNetUnfolderBase]: For 915426/915426 co-relation queries the response was YES. [2024-06-27 20:32:36,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71516 conditions, 7140 events. 4641/7140 cut-off events. For 915426/915426 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 41345 event pairs, 1190 based on Foata normal form. 6/7145 useless extension candidates. Maximal degree in co-relation 71392. Up to 6740 conditions per place. [2024-06-27 20:32:36,144 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 313 selfloop transitions, 45 changer transitions 0/365 dead transitions. [2024-06-27 20:32:36,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 365 transitions, 5922 flow [2024-06-27 20:32:36,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:36,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:32:36,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:32:36,145 INFO L175 Difference]: Start difference. First operand has 251 places, 329 transitions, 4674 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:32:36,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 365 transitions, 5922 flow [2024-06-27 20:32:37,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 365 transitions, 5688 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:37,074 INFO L231 Difference]: Finished difference. Result has 253 places, 332 transitions, 4722 flow [2024-06-27 20:32:37,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4722, PETRI_PLACES=253, PETRI_TRANSITIONS=332} [2024-06-27 20:32:37,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 20:32:37,074 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 332 transitions, 4722 flow [2024-06-27 20:32:37,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:37,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:37,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:37,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:32:37,074 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:37,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:37,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1304431955, now seen corresponding path program 10 times [2024-06-27 20:32:37,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:37,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524332484] [2024-06-27 20:32:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524332484] [2024-06-27 20:32:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524332484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899745754] [2024-06-27 20:32:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:38,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:38,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 332 transitions, 4722 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:38,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:38,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:38,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:39,736 INFO L124 PetriNetUnfolderBase]: 4905/7568 cut-off events. [2024-06-27 20:32:39,736 INFO L125 PetriNetUnfolderBase]: For 1083826/1083826 co-relation queries the response was YES. [2024-06-27 20:32:39,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79070 conditions, 7568 events. 4905/7568 cut-off events. For 1083826/1083826 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 44577 event pairs, 1236 based on Foata normal form. 24/7591 useless extension candidates. Maximal degree in co-relation 78945. Up to 6349 conditions per place. [2024-06-27 20:32:39,832 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 318 selfloop transitions, 62 changer transitions 0/387 dead transitions. [2024-06-27 20:32:39,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 387 transitions, 6707 flow [2024-06-27 20:32:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:32:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:32:39,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:32:39,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 20:32:39,833 INFO L175 Difference]: Start difference. First operand has 253 places, 332 transitions, 4722 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:32:39,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 387 transitions, 6707 flow [2024-06-27 20:32:41,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 387 transitions, 6449 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:41,127 INFO L231 Difference]: Finished difference. Result has 257 places, 336 transitions, 4875 flow [2024-06-27 20:32:41,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4875, PETRI_PLACES=257, PETRI_TRANSITIONS=336} [2024-06-27 20:32:41,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 20:32:41,127 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 336 transitions, 4875 flow [2024-06-27 20:32:41,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:41,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:41,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:41,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:32:41,128 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:41,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1471046649, now seen corresponding path program 11 times [2024-06-27 20:32:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:41,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131830765] [2024-06-27 20:32:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:42,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131830765] [2024-06-27 20:32:42,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131830765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:42,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:42,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:42,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910846919] [2024-06-27 20:32:42,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:42,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:42,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:42,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:42,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:42,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:42,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 336 transitions, 4875 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:42,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:42,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:44,265 INFO L124 PetriNetUnfolderBase]: 5077/7852 cut-off events. [2024-06-27 20:32:44,265 INFO L125 PetriNetUnfolderBase]: For 1252096/1252096 co-relation queries the response was YES. [2024-06-27 20:32:44,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82688 conditions, 7852 events. 5077/7852 cut-off events. For 1252096/1252096 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 46874 event pairs, 1313 based on Foata normal form. 54/7905 useless extension candidates. Maximal degree in co-relation 82561. Up to 7271 conditions per place. [2024-06-27 20:32:44,375 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 323 selfloop transitions, 53 changer transitions 0/383 dead transitions. [2024-06-27 20:32:44,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 383 transitions, 5982 flow [2024-06-27 20:32:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:32:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:32:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 216 transitions. [2024-06-27 20:32:44,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:32:44,376 INFO L175 Difference]: Start difference. First operand has 257 places, 336 transitions, 4875 flow. Second operand 12 states and 216 transitions. [2024-06-27 20:32:44,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 383 transitions, 5982 flow [2024-06-27 20:32:45,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 383 transitions, 5756 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:45,787 INFO L231 Difference]: Finished difference. Result has 264 places, 339 transitions, 4983 flow [2024-06-27 20:32:45,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4655, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4983, PETRI_PLACES=264, PETRI_TRANSITIONS=339} [2024-06-27 20:32:45,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 20:32:45,792 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 339 transitions, 4983 flow [2024-06-27 20:32:45,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:45,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:45,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:45,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:32:45,793 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 20:32:45,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:45,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1747462235, now seen corresponding path program 7 times [2024-06-27 20:32:45,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:45,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607829814] [2024-06-27 20:32:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:45,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:46,700 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 20:32:46,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607829814] [2024-06-27 20:32:46,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607829814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:46,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:46,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:46,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552060209] [2024-06-27 20:32:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:46,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:46,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 339 transitions, 4983 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:46,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:46,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:46,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:48,526 INFO L124 PetriNetUnfolderBase]: 5104/7893 cut-off events. [2024-06-27 20:32:48,526 INFO L125 PetriNetUnfolderBase]: For 1124488/1124488 co-relation queries the response was YES. [2024-06-27 20:32:48,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82630 conditions, 7893 events. 5104/7893 cut-off events. For 1124488/1124488 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 47070 event pairs, 1339 based on Foata normal form. 6/7898 useless extension candidates. Maximal degree in co-relation 82501. Up to 7632 conditions per place. [2024-06-27 20:32:48,632 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 331 selfloop transitions, 34 changer transitions 0/372 dead transitions. [2024-06-27 20:32:48,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 372 transitions, 5979 flow [2024-06-27 20:32:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:48,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:48,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:32:48,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:32:48,633 INFO L175 Difference]: Start difference. First operand has 264 places, 339 transitions, 4983 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:32:48,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 372 transitions, 5979 flow [2024-06-27 20:32:50,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 372 transitions, 5709 flow, removed 78 selfloop flow, removed 11 redundant places. [2024-06-27 20:32:50,247 INFO L231 Difference]: Finished difference. Result has 262 places, 342 transitions, 4987 flow [2024-06-27 20:32:50,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4713, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4987, PETRI_PLACES=262, PETRI_TRANSITIONS=342} [2024-06-27 20:32:50,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:32:50,248 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 342 transitions, 4987 flow [2024-06-27 20:32:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:50,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:50,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:50,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:32:50,249 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:50,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:50,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1107272701, now seen corresponding path program 8 times [2024-06-27 20:32:50,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:50,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576490605] [2024-06-27 20:32:50,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:50,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:51,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:51,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576490605] [2024-06-27 20:32:51,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576490605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:51,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:51,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:51,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700622389] [2024-06-27 20:32:51,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:51,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:51,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:51,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:51,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:51,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 342 transitions, 4987 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:51,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:51,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:51,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:53,014 INFO L124 PetriNetUnfolderBase]: 5167/7990 cut-off events. [2024-06-27 20:32:53,014 INFO L125 PetriNetUnfolderBase]: For 1150270/1150270 co-relation queries the response was YES. [2024-06-27 20:32:53,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82766 conditions, 7990 events. 5167/7990 cut-off events. For 1150270/1150270 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 47733 event pairs, 1357 based on Foata normal form. 6/7995 useless extension candidates. Maximal degree in co-relation 82637. Up to 7569 conditions per place. [2024-06-27 20:32:53,121 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 316 selfloop transitions, 57 changer transitions 0/380 dead transitions. [2024-06-27 20:32:53,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 380 transitions, 6477 flow [2024-06-27 20:32:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:32:53,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:32:53,122 INFO L175 Difference]: Start difference. First operand has 262 places, 342 transitions, 4987 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:32:53,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 380 transitions, 6477 flow [2024-06-27 20:32:54,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 380 transitions, 6227 flow, removed 93 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:54,301 INFO L231 Difference]: Finished difference. Result has 264 places, 348 transitions, 5265 flow [2024-06-27 20:32:54,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5265, PETRI_PLACES=264, PETRI_TRANSITIONS=348} [2024-06-27 20:32:54,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 20:32:54,302 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 348 transitions, 5265 flow [2024-06-27 20:32:54,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:54,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:54,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:54,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:32:54,302 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:54,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:54,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1293925131, now seen corresponding path program 12 times [2024-06-27 20:32:54,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:54,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041381985] [2024-06-27 20:32:54,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:54,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:55,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:55,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:55,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041381985] [2024-06-27 20:32:55,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041381985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:55,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:55,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:55,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115651586] [2024-06-27 20:32:55,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:55,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:55,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 348 transitions, 5265 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:55,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:55,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:57,207 INFO L124 PetriNetUnfolderBase]: 5289/8192 cut-off events. [2024-06-27 20:32:57,207 INFO L125 PetriNetUnfolderBase]: For 1273931/1273931 co-relation queries the response was YES. [2024-06-27 20:32:57,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85664 conditions, 8192 events. 5289/8192 cut-off events. For 1273931/1273931 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49335 event pairs, 1342 based on Foata normal form. 30/8221 useless extension candidates. Maximal degree in co-relation 85534. Up to 7399 conditions per place. [2024-06-27 20:32:57,319 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 306 selfloop transitions, 84 changer transitions 0/397 dead transitions. [2024-06-27 20:32:57,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 6794 flow [2024-06-27 20:32:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:32:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:32:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:32:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:32:57,320 INFO L175 Difference]: Start difference. First operand has 264 places, 348 transitions, 5265 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:32:57,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 6794 flow [2024-06-27 20:32:58,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 397 transitions, 6521 flow, removed 112 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:58,558 INFO L231 Difference]: Finished difference. Result has 270 places, 350 transitions, 5337 flow [2024-06-27 20:32:58,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5337, PETRI_PLACES=270, PETRI_TRANSITIONS=350} [2024-06-27 20:32:58,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 20:32:58,559 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 350 transitions, 5337 flow [2024-06-27 20:32:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:58,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:58,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:58,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:32:58,559 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:58,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:58,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1738258025, now seen corresponding path program 9 times [2024-06-27 20:32:58,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:58,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601920663] [2024-06-27 20:32:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:58,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:59,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:59,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601920663] [2024-06-27 20:32:59,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601920663] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:59,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:59,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:32:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965715989] [2024-06-27 20:32:59,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:32:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:59,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:32:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:32:59,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:32:59,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 350 transitions, 5337 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:59,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:59,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:32:59,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:01,434 INFO L124 PetriNetUnfolderBase]: 5276/8173 cut-off events. [2024-06-27 20:33:01,434 INFO L125 PetriNetUnfolderBase]: For 1223937/1223937 co-relation queries the response was YES. [2024-06-27 20:33:01,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85403 conditions, 8173 events. 5276/8173 cut-off events. For 1223937/1223937 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 49292 event pairs, 1392 based on Foata normal form. 6/8178 useless extension candidates. Maximal degree in co-relation 85271. Up to 7873 conditions per place. [2024-06-27 20:33:01,558 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 47 changer transitions 0/380 dead transitions. [2024-06-27 20:33:01,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 380 transitions, 6161 flow [2024-06-27 20:33:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:01,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:33:01,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:33:01,559 INFO L175 Difference]: Start difference. First operand has 270 places, 350 transitions, 5337 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:33:01,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 380 transitions, 6161 flow [2024-06-27 20:33:03,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 380 transitions, 5727 flow, removed 135 selfloop flow, removed 9 redundant places. [2024-06-27 20:33:03,329 INFO L231 Difference]: Finished difference. Result has 270 places, 350 transitions, 5009 flow [2024-06-27 20:33:03,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5009, PETRI_PLACES=270, PETRI_TRANSITIONS=350} [2024-06-27 20:33:03,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 20:33:03,330 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 350 transitions, 5009 flow [2024-06-27 20:33:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:03,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:03,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:03,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:33:03,330 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:03,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1304284085, now seen corresponding path program 13 times [2024-06-27 20:33:03,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:03,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415361808] [2024-06-27 20:33:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:03,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:04,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:04,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:04,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415361808] [2024-06-27 20:33:04,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415361808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:04,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:04,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:04,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048039837] [2024-06-27 20:33:04,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:04,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:04,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:04,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:04,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 350 transitions, 5009 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:04,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:04,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:04,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:06,426 INFO L124 PetriNetUnfolderBase]: 5400/8377 cut-off events. [2024-06-27 20:33:06,426 INFO L125 PetriNetUnfolderBase]: For 1310410/1310410 co-relation queries the response was YES. [2024-06-27 20:33:06,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86303 conditions, 8377 events. 5400/8377 cut-off events. For 1310410/1310410 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50862 event pairs, 1386 based on Foata normal form. 30/8406 useless extension candidates. Maximal degree in co-relation 86170. Up to 7739 conditions per place. [2024-06-27 20:33:06,547 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 325 selfloop transitions, 66 changer transitions 0/398 dead transitions. [2024-06-27 20:33:06,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 398 transitions, 6406 flow [2024-06-27 20:33:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:33:06,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:33:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:33:06,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 20:33:06,548 INFO L175 Difference]: Start difference. First operand has 270 places, 350 transitions, 5009 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:33:06,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 398 transitions, 6406 flow [2024-06-27 20:33:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 398 transitions, 6296 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:08,172 INFO L231 Difference]: Finished difference. Result has 273 places, 352 transitions, 5212 flow [2024-06-27 20:33:08,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4899, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5212, PETRI_PLACES=273, PETRI_TRANSITIONS=352} [2024-06-27 20:33:08,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:33:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 352 transitions, 5212 flow [2024-06-27 20:33:08,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:08,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:08,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:08,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:33:08,173 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:08,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1298713943, now seen corresponding path program 10 times [2024-06-27 20:33:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:08,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951149497] [2024-06-27 20:33:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:08,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:09,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:09,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951149497] [2024-06-27 20:33:09,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951149497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:09,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:09,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:09,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81799326] [2024-06-27 20:33:09,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:09,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:09,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:09,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:09,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:09,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 352 transitions, 5212 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:09,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:09,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:09,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:11,066 INFO L124 PetriNetUnfolderBase]: 5403/8382 cut-off events. [2024-06-27 20:33:11,066 INFO L125 PetriNetUnfolderBase]: For 1246215/1246215 co-relation queries the response was YES. [2024-06-27 20:33:11,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86797 conditions, 8382 events. 5403/8382 cut-off events. For 1246215/1246215 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50970 event pairs, 1404 based on Foata normal form. 6/8387 useless extension candidates. Maximal degree in co-relation 86663. Up to 7984 conditions per place. [2024-06-27 20:33:11,164 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 334 selfloop transitions, 46 changer transitions 0/387 dead transitions. [2024-06-27 20:33:11,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 387 transitions, 6409 flow [2024-06-27 20:33:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:33:11,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:33:11,165 INFO L175 Difference]: Start difference. First operand has 273 places, 352 transitions, 5212 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:33:11,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 387 transitions, 6409 flow [2024-06-27 20:33:12,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 387 transitions, 6145 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 20:33:12,532 INFO L231 Difference]: Finished difference. Result has 273 places, 355 transitions, 5257 flow [2024-06-27 20:33:12,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5257, PETRI_PLACES=273, PETRI_TRANSITIONS=355} [2024-06-27 20:33:12,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:33:12,533 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 355 transitions, 5257 flow [2024-06-27 20:33:12,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:12,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:12,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:12,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:33:12,533 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:12,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1288203399, now seen corresponding path program 11 times [2024-06-27 20:33:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:12,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854513657] [2024-06-27 20:33:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:12,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:13,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:13,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854513657] [2024-06-27 20:33:13,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854513657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:13,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:13,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:13,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622732473] [2024-06-27 20:33:13,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:13,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:13,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:13,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:13,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:13,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 355 transitions, 5257 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:13,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:13,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:13,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:15,336 INFO L124 PetriNetUnfolderBase]: 5406/8387 cut-off events. [2024-06-27 20:33:15,336 INFO L125 PetriNetUnfolderBase]: For 1227501/1227501 co-relation queries the response was YES. [2024-06-27 20:33:15,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85628 conditions, 8387 events. 5406/8387 cut-off events. For 1227501/1227501 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 50959 event pairs, 1408 based on Foata normal form. 6/8392 useless extension candidates. Maximal degree in co-relation 85493. Up to 7903 conditions per place. [2024-06-27 20:33:15,443 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 329 selfloop transitions, 54 changer transitions 0/390 dead transitions. [2024-06-27 20:33:15,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 390 transitions, 6469 flow [2024-06-27 20:33:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:33:15,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:33:15,444 INFO L175 Difference]: Start difference. First operand has 273 places, 355 transitions, 5257 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:33:15,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 390 transitions, 6469 flow [2024-06-27 20:33:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 390 transitions, 6187 flow, removed 97 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:16,887 INFO L231 Difference]: Finished difference. Result has 275 places, 358 transitions, 5309 flow [2024-06-27 20:33:16,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4975, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5309, PETRI_PLACES=275, PETRI_TRANSITIONS=358} [2024-06-27 20:33:16,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 20:33:16,887 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 358 transitions, 5309 flow [2024-06-27 20:33:16,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:16,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:16,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:16,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:33:16,888 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:16,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1298921705, now seen corresponding path program 14 times [2024-06-27 20:33:16,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:16,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166545188] [2024-06-27 20:33:16,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:16,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:17,835 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 20:33:17,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:17,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166545188] [2024-06-27 20:33:17,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166545188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:17,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:17,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:17,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276121833] [2024-06-27 20:33:17,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:17,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:17,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:17,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:17,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:17,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 358 transitions, 5309 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:17,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:17,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:17,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:19,874 INFO L124 PetriNetUnfolderBase]: 5480/8513 cut-off events. [2024-06-27 20:33:19,875 INFO L125 PetriNetUnfolderBase]: For 1352586/1352586 co-relation queries the response was YES. [2024-06-27 20:33:19,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86813 conditions, 8513 events. 5480/8513 cut-off events. For 1352586/1352586 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 51832 event pairs, 1409 based on Foata normal form. 30/8542 useless extension candidates. Maximal degree in co-relation 86677. Up to 7875 conditions per place. [2024-06-27 20:33:19,995 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 333 selfloop transitions, 65 changer transitions 0/405 dead transitions. [2024-06-27 20:33:19,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 405 transitions, 6586 flow [2024-06-27 20:33:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:33:19,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:33:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-27 20:33:19,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45021645021645024 [2024-06-27 20:33:19,996 INFO L175 Difference]: Start difference. First operand has 275 places, 358 transitions, 5309 flow. Second operand 11 states and 208 transitions. [2024-06-27 20:33:19,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 405 transitions, 6586 flow [2024-06-27 20:33:21,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 405 transitions, 6276 flow, removed 103 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:21,948 INFO L231 Difference]: Finished difference. Result has 279 places, 360 transitions, 5320 flow [2024-06-27 20:33:21,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4999, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5320, PETRI_PLACES=279, PETRI_TRANSITIONS=360} [2024-06-27 20:33:21,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 20:33:21,949 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 360 transitions, 5320 flow [2024-06-27 20:33:21,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:21,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:21,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:21,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:33:21,949 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 20:33:21,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1596383551, now seen corresponding path program 2 times [2024-06-27 20:33:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154281509] [2024-06-27 20:33:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:22,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:22,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154281509] [2024-06-27 20:33:22,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154281509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:22,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:22,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:22,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942837257] [2024-06-27 20:33:22,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:22,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:22,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:22,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:22,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:22,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 360 transitions, 5320 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:22,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:22,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:22,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:24,190 INFO L124 PetriNetUnfolderBase]: 5396/8373 cut-off events. [2024-06-27 20:33:24,190 INFO L125 PetriNetUnfolderBase]: For 1269660/1269683 co-relation queries the response was YES. [2024-06-27 20:33:24,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86232 conditions, 8373 events. 5396/8373 cut-off events. For 1269660/1269683 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 51027 event pairs, 1456 based on Foata normal form. 2/8278 useless extension candidates. Maximal degree in co-relation 86095. Up to 8205 conditions per place. [2024-06-27 20:33:24,304 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 339 selfloop transitions, 14 changer transitions 0/373 dead transitions. [2024-06-27 20:33:24,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 373 transitions, 6096 flow [2024-06-27 20:33:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:24,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:33:24,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 20:33:24,305 INFO L175 Difference]: Start difference. First operand has 279 places, 360 transitions, 5320 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:33:24,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 373 transitions, 6096 flow [2024-06-27 20:33:26,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 373 transitions, 5858 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:26,171 INFO L231 Difference]: Finished difference. Result has 278 places, 363 transitions, 5168 flow [2024-06-27 20:33:26,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5168, PETRI_PLACES=278, PETRI_TRANSITIONS=363} [2024-06-27 20:33:26,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:33:26,172 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 363 transitions, 5168 flow [2024-06-27 20:33:26,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:26,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:26,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:33:26,172 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 20:33:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:26,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1280038891, now seen corresponding path program 3 times [2024-06-27 20:33:26,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:26,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75615512] [2024-06-27 20:33:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:26,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:26,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75615512] [2024-06-27 20:33:26,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75615512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:26,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:26,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:26,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946792234] [2024-06-27 20:33:26,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:26,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:26,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 363 transitions, 5168 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:26,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:26,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:26,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:28,495 INFO L124 PetriNetUnfolderBase]: 5390/8365 cut-off events. [2024-06-27 20:33:28,495 INFO L125 PetriNetUnfolderBase]: For 1270789/1270812 co-relation queries the response was YES. [2024-06-27 20:33:28,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84475 conditions, 8365 events. 5390/8365 cut-off events. For 1270789/1270812 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 50975 event pairs, 1450 based on Foata normal form. 2/8270 useless extension candidates. Maximal degree in co-relation 84337. Up to 8189 conditions per place. [2024-06-27 20:33:28,633 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 332 selfloop transitions, 21 changer transitions 0/373 dead transitions. [2024-06-27 20:33:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 373 transitions, 5898 flow [2024-06-27 20:33:28,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 20:33:28,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 20:33:28,634 INFO L175 Difference]: Start difference. First operand has 278 places, 363 transitions, 5168 flow. Second operand 7 states and 116 transitions. [2024-06-27 20:33:28,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 373 transitions, 5898 flow [2024-06-27 20:33:30,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 5822 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:30,463 INFO L231 Difference]: Finished difference. Result has 280 places, 363 transitions, 5141 flow [2024-06-27 20:33:30,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5092, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5141, PETRI_PLACES=280, PETRI_TRANSITIONS=363} [2024-06-27 20:33:30,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 20:33:30,463 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 363 transitions, 5141 flow [2024-06-27 20:33:30,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:30,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:30,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:30,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:33:30,464 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 20:33:30,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:30,464 INFO L85 PathProgramCache]: Analyzing trace with hash -744235687, now seen corresponding path program 1 times [2024-06-27 20:33:30,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:30,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517863122] [2024-06-27 20:33:30,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:30,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:31,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:31,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517863122] [2024-06-27 20:33:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517863122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:31,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:31,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375068235] [2024-06-27 20:33:31,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:31,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:31,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:31,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:31,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:31,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 363 transitions, 5141 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:31,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:31,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:31,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:32,904 INFO L124 PetriNetUnfolderBase]: 5652/8693 cut-off events. [2024-06-27 20:33:32,904 INFO L125 PetriNetUnfolderBase]: For 1303675/1303675 co-relation queries the response was YES. [2024-06-27 20:33:32,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86746 conditions, 8693 events. 5652/8693 cut-off events. For 1303675/1303675 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52173 event pairs, 1509 based on Foata normal form. 3/8695 useless extension candidates. Maximal degree in co-relation 86607. Up to 8593 conditions per place. [2024-06-27 20:33:33,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 354 selfloop transitions, 30 changer transitions 0/387 dead transitions. [2024-06-27 20:33:33,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 387 transitions, 6283 flow [2024-06-27 20:33:33,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:33:33,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 20:33:33,032 INFO L175 Difference]: Start difference. First operand has 280 places, 363 transitions, 5141 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:33:33,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 387 transitions, 6283 flow [2024-06-27 20:33:34,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 387 transitions, 6197 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:34,902 INFO L231 Difference]: Finished difference. Result has 280 places, 370 transitions, 5253 flow [2024-06-27 20:33:34,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5253, PETRI_PLACES=280, PETRI_TRANSITIONS=370} [2024-06-27 20:33:34,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-27 20:33:34,902 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 370 transitions, 5253 flow [2024-06-27 20:33:34,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:34,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:34,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:33:34,903 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 20:33:34,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash -223911847, now seen corresponding path program 2 times [2024-06-27 20:33:34,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:34,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106383259] [2024-06-27 20:33:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:34,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:35,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:35,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106383259] [2024-06-27 20:33:35,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106383259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:35,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:35,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266609894] [2024-06-27 20:33:35,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:35,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:35,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 370 transitions, 5253 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:35,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:35,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:35,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:37,320 INFO L124 PetriNetUnfolderBase]: 5657/8701 cut-off events. [2024-06-27 20:33:37,320 INFO L125 PetriNetUnfolderBase]: For 1330160/1330162 co-relation queries the response was YES. [2024-06-27 20:33:37,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87850 conditions, 8701 events. 5657/8701 cut-off events. For 1330160/1330162 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52244 event pairs, 1523 based on Foata normal form. 1/8701 useless extension candidates. Maximal degree in co-relation 87711. Up to 8597 conditions per place. [2024-06-27 20:33:37,442 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 36 changer transitions 0/390 dead transitions. [2024-06-27 20:33:37,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 390 transitions, 6539 flow [2024-06-27 20:33:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:33:37,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:33:37,443 INFO L175 Difference]: Start difference. First operand has 280 places, 370 transitions, 5253 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:33:37,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 390 transitions, 6539 flow [2024-06-27 20:33:39,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 390 transitions, 6434 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-27 20:33:39,151 INFO L231 Difference]: Finished difference. Result has 284 places, 376 transitions, 5380 flow [2024-06-27 20:33:39,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5152, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5380, PETRI_PLACES=284, PETRI_TRANSITIONS=376} [2024-06-27 20:33:39,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 20:33:39,152 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 376 transitions, 5380 flow [2024-06-27 20:33:39,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:39,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:39,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:39,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:33:39,152 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 20:33:39,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:39,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1069982533, now seen corresponding path program 3 times [2024-06-27 20:33:39,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:39,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760508350] [2024-06-27 20:33:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:39,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:39,718 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 20:33:39,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:39,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760508350] [2024-06-27 20:33:39,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760508350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:39,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:39,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440877892] [2024-06-27 20:33:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:39,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:33:39,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 376 transitions, 5380 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:39,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:39,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:33:39,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:41,602 INFO L124 PetriNetUnfolderBase]: 5654/8697 cut-off events. [2024-06-27 20:33:41,603 INFO L125 PetriNetUnfolderBase]: For 1356455/1356457 co-relation queries the response was YES. [2024-06-27 20:33:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88165 conditions, 8697 events. 5654/8697 cut-off events. For 1356455/1356457 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52216 event pairs, 1523 based on Foata normal form. 1/8697 useless extension candidates. Maximal degree in co-relation 88024. Up to 8595 conditions per place. [2024-06-27 20:33:41,736 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 38 changer transitions 0/389 dead transitions. [2024-06-27 20:33:41,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 389 transitions, 6350 flow [2024-06-27 20:33:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:33:41,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:33:41,737 INFO L175 Difference]: Start difference. First operand has 284 places, 376 transitions, 5380 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:33:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 389 transitions, 6350 flow [2024-06-27 20:33:43,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 389 transitions, 6205 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-27 20:33:43,725 INFO L231 Difference]: Finished difference. Result has 289 places, 376 transitions, 5317 flow [2024-06-27 20:33:43,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5235, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5317, PETRI_PLACES=289, PETRI_TRANSITIONS=376} [2024-06-27 20:33:43,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 20:33:43,725 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 376 transitions, 5317 flow [2024-06-27 20:33:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:43,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:43,726 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 20:33:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:33:43,726 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 20:33:43,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:43,726 INFO L85 PathProgramCache]: Analyzing trace with hash 701479268, now seen corresponding path program 1 times [2024-06-27 20:33:43,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:43,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646991612] [2024-06-27 20:33:43,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:43,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:43,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:44,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646991612] [2024-06-27 20:33:44,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646991612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:44,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:44,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222763990] [2024-06-27 20:33:44,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:44,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:44,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:44,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 376 transitions, 5317 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:44,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:44,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:44,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:46,273 INFO L124 PetriNetUnfolderBase]: 5527/8571 cut-off events. [2024-06-27 20:33:46,274 INFO L125 PetriNetUnfolderBase]: For 1376122/1376122 co-relation queries the response was YES. [2024-06-27 20:33:46,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87483 conditions, 8571 events. 5527/8571 cut-off events. For 1376122/1376122 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52078 event pairs, 1459 based on Foata normal form. 1/8571 useless extension candidates. Maximal degree in co-relation 87339. Up to 8370 conditions per place. [2024-06-27 20:33:46,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 31 changer transitions 0/409 dead transitions. [2024-06-27 20:33:46,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 409 transitions, 6412 flow [2024-06-27 20:33:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:33:46,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:33:46,395 INFO L175 Difference]: Start difference. First operand has 289 places, 376 transitions, 5317 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:33:46,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 409 transitions, 6412 flow [2024-06-27 20:33:48,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 409 transitions, 6313 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:48,732 INFO L231 Difference]: Finished difference. Result has 290 places, 379 transitions, 5345 flow [2024-06-27 20:33:48,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5218, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5345, PETRI_PLACES=290, PETRI_TRANSITIONS=379} [2024-06-27 20:33:48,732 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 20:33:48,732 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 379 transitions, 5345 flow [2024-06-27 20:33:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:48,732 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 20:33:48,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:33:48,733 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 20:33:48,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:48,733 INFO L85 PathProgramCache]: Analyzing trace with hash 701748038, now seen corresponding path program 2 times [2024-06-27 20:33:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:48,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895647717] [2024-06-27 20:33:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:49,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:49,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895647717] [2024-06-27 20:33:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895647717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:49,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:49,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:33:49,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922674973] [2024-06-27 20:33:49,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:49,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:33:49,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:49,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:33:49,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:33:49,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:49,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 379 transitions, 5345 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:49,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:49,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:49,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:51,536 INFO L124 PetriNetUnfolderBase]: 5537/8585 cut-off events. [2024-06-27 20:33:51,537 INFO L125 PetriNetUnfolderBase]: For 1403929/1403929 co-relation queries the response was YES. [2024-06-27 20:33:51,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87937 conditions, 8585 events. 5537/8585 cut-off events. For 1403929/1403929 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52238 event pairs, 1459 based on Foata normal form. 1/8585 useless extension candidates. Maximal degree in co-relation 87793. Up to 8404 conditions per place. [2024-06-27 20:33:51,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 367 selfloop transitions, 29 changer transitions 0/408 dead transitions. [2024-06-27 20:33:51,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 408 transitions, 6313 flow [2024-06-27 20:33:51,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:33:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:33:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:33:51,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:33:51,644 INFO L175 Difference]: Start difference. First operand has 290 places, 379 transitions, 5345 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:33:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 408 transitions, 6313 flow [2024-06-27 20:33:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 408 transitions, 6101 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-27 20:33:53,725 INFO L231 Difference]: Finished difference. Result has 290 places, 385 transitions, 5321 flow [2024-06-27 20:33:53,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5156, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5321, PETRI_PLACES=290, PETRI_TRANSITIONS=385} [2024-06-27 20:33:53,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 20:33:53,726 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 385 transitions, 5321 flow [2024-06-27 20:33:53,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:53,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:53,726 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 20:33:53,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:33:53,726 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 20:33:53,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 481633808, now seen corresponding path program 1 times [2024-06-27 20:33:53,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:53,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253729283] [2024-06-27 20:33:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:53,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:54,360 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 20:33:54,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253729283] [2024-06-27 20:33:54,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253729283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:54,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:54,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:54,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931393506] [2024-06-27 20:33:54,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:54,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:54,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 385 transitions, 5321 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:54,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:54,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:54,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:56,094 INFO L124 PetriNetUnfolderBase]: 5536/8585 cut-off events. [2024-06-27 20:33:56,094 INFO L125 PetriNetUnfolderBase]: For 1431493/1431495 co-relation queries the response was YES. [2024-06-27 20:33:56,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87849 conditions, 8585 events. 5536/8585 cut-off events. For 1431493/1431495 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 52236 event pairs, 1333 based on Foata normal form. 3/8587 useless extension candidates. Maximal degree in co-relation 87705. Up to 8260 conditions per place. [2024-06-27 20:33:56,209 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 43 changer transitions 0/412 dead transitions. [2024-06-27 20:33:56,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 412 transitions, 6558 flow [2024-06-27 20:33:56,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:33:56,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:33:56,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:33:56,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:33:56,210 INFO L175 Difference]: Start difference. First operand has 290 places, 385 transitions, 5321 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:33:56,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 412 transitions, 6558 flow [2024-06-27 20:33:58,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 412 transitions, 6480 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:58,096 INFO L231 Difference]: Finished difference. Result has 292 places, 388 transitions, 5372 flow [2024-06-27 20:33:58,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5243, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5372, PETRI_PLACES=292, PETRI_TRANSITIONS=388} [2024-06-27 20:33:58,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-27 20:33:58,097 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 388 transitions, 5372 flow [2024-06-27 20:33:58,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:58,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:58,097 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 20:33:58,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:33:58,097 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 20:33:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1811228434, now seen corresponding path program 2 times [2024-06-27 20:33:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:58,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811292820] [2024-06-27 20:33:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:58,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:58,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:58,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811292820] [2024-06-27 20:33:58,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811292820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:58,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:58,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:33:58,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175186456] [2024-06-27 20:33:58,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:58,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:33:58,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:58,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:33:58,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:33:58,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:33:58,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 388 transitions, 5372 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:58,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:58,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:33:58,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:00,542 INFO L124 PetriNetUnfolderBase]: 5563/8623 cut-off events. [2024-06-27 20:34:00,542 INFO L125 PetriNetUnfolderBase]: For 1464389/1464391 co-relation queries the response was YES. [2024-06-27 20:34:00,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88977 conditions, 8623 events. 5563/8623 cut-off events. For 1464389/1464391 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52422 event pairs, 1343 based on Foata normal form. 1/8623 useless extension candidates. Maximal degree in co-relation 88832. Up to 8285 conditions per place. [2024-06-27 20:34:00,664 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 351 selfloop transitions, 53 changer transitions 0/416 dead transitions. [2024-06-27 20:34:00,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 416 transitions, 6704 flow [2024-06-27 20:34:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:34:00,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:34:00,665 INFO L175 Difference]: Start difference. First operand has 292 places, 388 transitions, 5372 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:34:00,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 416 transitions, 6704 flow [2024-06-27 20:34:02,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 416 transitions, 6618 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:02,785 INFO L231 Difference]: Finished difference. Result has 296 places, 396 transitions, 5547 flow [2024-06-27 20:34:02,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5547, PETRI_PLACES=296, PETRI_TRANSITIONS=396} [2024-06-27 20:34:02,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 20:34:02,785 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 396 transitions, 5547 flow [2024-06-27 20:34:02,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:02,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:02,785 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 20:34:02,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:34:02,786 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:02,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:02,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1883746066, now seen corresponding path program 1 times [2024-06-27 20:34:02,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:02,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485800991] [2024-06-27 20:34:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:04,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:04,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:04,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485800991] [2024-06-27 20:34:04,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485800991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:04,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:04,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:34:04,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718087882] [2024-06-27 20:34:04,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:34:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:34:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:34:04,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:04,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 396 transitions, 5547 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:04,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:04,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:04,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:06,024 INFO L124 PetriNetUnfolderBase]: 5633/8741 cut-off events. [2024-06-27 20:34:06,024 INFO L125 PetriNetUnfolderBase]: For 1575115/1575117 co-relation queries the response was YES. [2024-06-27 20:34:06,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90903 conditions, 8741 events. 5633/8741 cut-off events. For 1575115/1575117 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 53356 event pairs, 1264 based on Foata normal form. 18/8758 useless extension candidates. Maximal degree in co-relation 90756. Up to 7899 conditions per place. [2024-06-27 20:34:06,149 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 330 selfloop transitions, 101 changer transitions 0/443 dead transitions. [2024-06-27 20:34:06,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 443 transitions, 7234 flow [2024-06-27 20:34:06,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 20:34:06,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-27 20:34:06,150 INFO L175 Difference]: Start difference. First operand has 296 places, 396 transitions, 5547 flow. Second operand 10 states and 199 transitions. [2024-06-27 20:34:06,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 443 transitions, 7234 flow [2024-06-27 20:34:08,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 443 transitions, 7165 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:08,524 INFO L231 Difference]: Finished difference. Result has 303 places, 398 transitions, 5862 flow [2024-06-27 20:34:08,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5862, PETRI_PLACES=303, PETRI_TRANSITIONS=398} [2024-06-27 20:34:08,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-27 20:34:08,524 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 398 transitions, 5862 flow [2024-06-27 20:34:08,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:08,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:08,525 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 20:34:08,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:34:08,525 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:08,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2056235956, now seen corresponding path program 2 times [2024-06-27 20:34:08,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:08,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791852100] [2024-06-27 20:34:08,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:08,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:09,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:09,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791852100] [2024-06-27 20:34:09,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791852100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:09,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:09,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:34:09,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790176443] [2024-06-27 20:34:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:09,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:34:09,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:34:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:34:09,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:09,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 398 transitions, 5862 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:09,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:09,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:09,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:12,080 INFO L124 PetriNetUnfolderBase]: 5640/8754 cut-off events. [2024-06-27 20:34:12,080 INFO L125 PetriNetUnfolderBase]: For 1580228/1580230 co-relation queries the response was YES. [2024-06-27 20:34:12,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90819 conditions, 8754 events. 5640/8754 cut-off events. For 1580228/1580230 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 53430 event pairs, 1284 based on Foata normal form. 18/8771 useless extension candidates. Maximal degree in co-relation 90671. Up to 7912 conditions per place. [2024-06-27 20:34:12,189 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 326 selfloop transitions, 106 changer transitions 0/444 dead transitions. [2024-06-27 20:34:12,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 444 transitions, 7383 flow [2024-06-27 20:34:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:34:12,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 20:34:12,190 INFO L175 Difference]: Start difference. First operand has 303 places, 398 transitions, 5862 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:34:12,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 444 transitions, 7383 flow [2024-06-27 20:34:14,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 444 transitions, 7036 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:14,945 INFO L231 Difference]: Finished difference. Result has 305 places, 400 transitions, 5913 flow [2024-06-27 20:34:14,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5913, PETRI_PLACES=305, PETRI_TRANSITIONS=400} [2024-06-27 20:34:14,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 20:34:14,945 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 400 transitions, 5913 flow [2024-06-27 20:34:14,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:14,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:14,945 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 20:34:14,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:34:14,946 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:14,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash 430693412, now seen corresponding path program 3 times [2024-06-27 20:34:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:14,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862874994] [2024-06-27 20:34:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:14,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:16,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:16,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:16,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862874994] [2024-06-27 20:34:16,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862874994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:16,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:16,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:34:16,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143332783] [2024-06-27 20:34:16,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:16,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:34:16,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:16,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:34:16,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:34:16,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:16,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 400 transitions, 5913 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:16,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:16,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:16,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:18,265 INFO L124 PetriNetUnfolderBase]: 5708/8870 cut-off events. [2024-06-27 20:34:18,265 INFO L125 PetriNetUnfolderBase]: For 1642301/1642303 co-relation queries the response was YES. [2024-06-27 20:34:18,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91983 conditions, 8870 events. 5708/8870 cut-off events. For 1642301/1642303 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54557 event pairs, 1241 based on Foata normal form. 18/8887 useless extension candidates. Maximal degree in co-relation 91834. Up to 7916 conditions per place. [2024-06-27 20:34:18,393 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 117 changer transitions 0/446 dead transitions. [2024-06-27 20:34:18,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 446 transitions, 7455 flow [2024-06-27 20:34:18,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:34:18,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-27 20:34:18,394 INFO L175 Difference]: Start difference. First operand has 305 places, 400 transitions, 5913 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:34:18,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 446 transitions, 7455 flow [2024-06-27 20:34:21,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 446 transitions, 7094 flow, removed 76 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:21,477 INFO L231 Difference]: Finished difference. Result has 307 places, 402 transitions, 5987 flow [2024-06-27 20:34:21,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5552, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5987, PETRI_PLACES=307, PETRI_TRANSITIONS=402} [2024-06-27 20:34:21,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 20:34:21,478 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 402 transitions, 5987 flow [2024-06-27 20:34:21,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:21,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:21,478 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 20:34:21,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:34:21,479 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 20:34:21,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:21,479 INFO L85 PathProgramCache]: Analyzing trace with hash 711002468, now seen corresponding path program 3 times [2024-06-27 20:34:21,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:21,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42536942] [2024-06-27 20:34:21,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:21,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:22,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:22,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42536942] [2024-06-27 20:34:22,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42536942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:22,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:22,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:22,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897143079] [2024-06-27 20:34:22,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:22,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:22,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:22,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:22,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:22,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:22,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 402 transitions, 5987 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:22,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:22,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:22,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:24,107 INFO L124 PetriNetUnfolderBase]: 5713/8876 cut-off events. [2024-06-27 20:34:24,107 INFO L125 PetriNetUnfolderBase]: For 1568375/1568375 co-relation queries the response was YES. [2024-06-27 20:34:24,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91614 conditions, 8876 events. 5713/8876 cut-off events. For 1568375/1568375 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 54454 event pairs, 1493 based on Foata normal form. 1/8876 useless extension candidates. Maximal degree in co-relation 91464. Up to 8695 conditions per place. [2024-06-27 20:34:24,238 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 29 changer transitions 0/422 dead transitions. [2024-06-27 20:34:24,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 422 transitions, 6907 flow [2024-06-27 20:34:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:34:24,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 20:34:24,239 INFO L175 Difference]: Start difference. First operand has 307 places, 402 transitions, 5987 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:34:24,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 422 transitions, 6907 flow [2024-06-27 20:34:27,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 422 transitions, 6502 flow, removed 87 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:27,218 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5710 flow [2024-06-27 20:34:27,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5582, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5710, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-27 20:34:27,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 20:34:27,219 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5710 flow [2024-06-27 20:34:27,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:27,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:27,219 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 20:34:27,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:34:27,219 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 20:34:27,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash 711014372, now seen corresponding path program 1 times [2024-06-27 20:34:27,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:27,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062767927] [2024-06-27 20:34:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:27,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:27,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:27,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062767927] [2024-06-27 20:34:27,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062767927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:27,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:27,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:34:27,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710890905] [2024-06-27 20:34:27,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:27,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:34:27,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:27,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:34:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:34:28,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:28,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5710 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:28,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:28,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:28,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:30,049 INFO L124 PetriNetUnfolderBase]: 5649/8774 cut-off events. [2024-06-27 20:34:30,049 INFO L125 PetriNetUnfolderBase]: For 1649527/1649587 co-relation queries the response was YES. [2024-06-27 20:34:30,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90684 conditions, 8774 events. 5649/8774 cut-off events. For 1649527/1649587 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53999 event pairs, 1487 based on Foata normal form. 11/8697 useless extension candidates. Maximal degree in co-relation 90533. Up to 8500 conditions per place. [2024-06-27 20:34:30,177 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 372 selfloop transitions, 40 changer transitions 0/436 dead transitions. [2024-06-27 20:34:30,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 436 transitions, 6898 flow [2024-06-27 20:34:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:34:30,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:34:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:34:30,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:34:30,178 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5710 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:34:30,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 436 transitions, 6898 flow [2024-06-27 20:34:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 436 transitions, 6814 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:33,006 INFO L231 Difference]: Finished difference. Result has 311 places, 414 transitions, 5864 flow [2024-06-27 20:34:33,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5626, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5864, PETRI_PLACES=311, PETRI_TRANSITIONS=414} [2024-06-27 20:34:33,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 20:34:33,007 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 414 transitions, 5864 flow [2024-06-27 20:34:33,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:33,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:33,007 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 20:34:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:34:33,007 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 20:34:33,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1607910440, now seen corresponding path program 3 times [2024-06-27 20:34:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:33,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890778661] [2024-06-27 20:34:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:33,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:33,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:33,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890778661] [2024-06-27 20:34:33,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890778661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:33,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:33,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:33,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815496608] [2024-06-27 20:34:33,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:33,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:33,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:33,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:33,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 414 transitions, 5864 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:33,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:33,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:33,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:35,423 INFO L124 PetriNetUnfolderBase]: 5762/8946 cut-off events. [2024-06-27 20:34:35,424 INFO L125 PetriNetUnfolderBase]: For 1636326/1636326 co-relation queries the response was YES. [2024-06-27 20:34:35,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91746 conditions, 8946 events. 5762/8946 cut-off events. For 1636326/1636326 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 54886 event pairs, 1481 based on Foata normal form. 3/8948 useless extension candidates. Maximal degree in co-relation 91593. Up to 8690 conditions per place. [2024-06-27 20:34:35,556 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 388 selfloop transitions, 33 changer transitions 0/433 dead transitions. [2024-06-27 20:34:35,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 433 transitions, 6940 flow [2024-06-27 20:34:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:34:35,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 20:34:35,557 INFO L175 Difference]: Start difference. First operand has 311 places, 414 transitions, 5864 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:34:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 433 transitions, 6940 flow [2024-06-27 20:34:38,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 433 transitions, 6852 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 20:34:38,773 INFO L231 Difference]: Finished difference. Result has 315 places, 414 transitions, 5851 flow [2024-06-27 20:34:38,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5851, PETRI_PLACES=315, PETRI_TRANSITIONS=414} [2024-06-27 20:34:38,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-27 20:34:38,773 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 414 transitions, 5851 flow [2024-06-27 20:34:38,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:38,774 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 20:34:38,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:34:38,774 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 20:34:38,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -609404690, now seen corresponding path program 4 times [2024-06-27 20:34:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:38,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176291313] [2024-06-27 20:34:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:38,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176291313] [2024-06-27 20:34:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176291313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:39,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:39,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:39,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735814797] [2024-06-27 20:34:39,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:39,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:39,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:39,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 414 transitions, 5851 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:39,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:39,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:39,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:41,278 INFO L124 PetriNetUnfolderBase]: 5768/8952 cut-off events. [2024-06-27 20:34:41,279 INFO L125 PetriNetUnfolderBase]: For 1661434/1661448 co-relation queries the response was YES. [2024-06-27 20:34:41,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91941 conditions, 8952 events. 5768/8952 cut-off events. For 1661434/1661448 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54981 event pairs, 1504 based on Foata normal form. 3/8949 useless extension candidates. Maximal degree in co-relation 91785. Up to 8778 conditions per place. [2024-06-27 20:34:41,410 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 23 changer transitions 0/431 dead transitions. [2024-06-27 20:34:41,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 431 transitions, 6784 flow [2024-06-27 20:34:41,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:41,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:34:41,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:34:41,411 INFO L175 Difference]: Start difference. First operand has 315 places, 414 transitions, 5851 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:34:41,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 431 transitions, 6784 flow [2024-06-27 20:34:45,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 431 transitions, 6741 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:34:45,286 INFO L231 Difference]: Finished difference. Result has 318 places, 417 transitions, 5926 flow [2024-06-27 20:34:45,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5810, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5926, PETRI_PLACES=318, PETRI_TRANSITIONS=417} [2024-06-27 20:34:45,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:34:45,287 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 417 transitions, 5926 flow [2024-06-27 20:34:45,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:45,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:45,287 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 20:34:45,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:34:45,288 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 20:34:45,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:45,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1898377532, now seen corresponding path program 5 times [2024-06-27 20:34:45,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254906667] [2024-06-27 20:34:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254906667] [2024-06-27 20:34:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254906667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:45,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301968665] [2024-06-27 20:34:45,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:45,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:45,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:45,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:45,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 417 transitions, 5926 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:45,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:45,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:45,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:47,729 INFO L124 PetriNetUnfolderBase]: 5717/8867 cut-off events. [2024-06-27 20:34:47,729 INFO L125 PetriNetUnfolderBase]: For 1679286/1679302 co-relation queries the response was YES. [2024-06-27 20:34:47,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91611 conditions, 8867 events. 5717/8867 cut-off events. For 1679286/1679302 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 54270 event pairs, 1499 based on Foata normal form. 1/8862 useless extension candidates. Maximal degree in co-relation 91454. Up to 8682 conditions per place. [2024-06-27 20:34:47,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 32 changer transitions 0/429 dead transitions. [2024-06-27 20:34:47,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 429 transitions, 6978 flow [2024-06-27 20:34:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:34:47,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:34:47,859 INFO L175 Difference]: Start difference. First operand has 318 places, 417 transitions, 5926 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:34:47,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 429 transitions, 6978 flow [2024-06-27 20:34:51,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 429 transitions, 6900 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:34:51,896 INFO L231 Difference]: Finished difference. Result has 319 places, 417 transitions, 5918 flow [2024-06-27 20:34:51,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5848, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5918, PETRI_PLACES=319, PETRI_TRANSITIONS=417} [2024-06-27 20:34:51,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-27 20:34:51,897 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 417 transitions, 5918 flow [2024-06-27 20:34:51,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:51,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:51,897 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 20:34:51,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:34:51,897 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 20:34:51,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash 586705134, now seen corresponding path program 6 times [2024-06-27 20:34:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:51,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158468429] [2024-06-27 20:34:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:51,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:52,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:52,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158468429] [2024-06-27 20:34:52,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158468429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:52,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:52,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:34:52,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151859587] [2024-06-27 20:34:52,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:52,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:34:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:52,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:34:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:34:52,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:52,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 417 transitions, 5918 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:52,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:52,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:52,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:54,313 INFO L124 PetriNetUnfolderBase]: 5673/8798 cut-off events. [2024-06-27 20:34:54,313 INFO L125 PetriNetUnfolderBase]: For 1699851/1699867 co-relation queries the response was YES. [2024-06-27 20:34:54,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91217 conditions, 8798 events. 5673/8798 cut-off events. For 1699851/1699867 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53775 event pairs, 1492 based on Foata normal form. 1/8793 useless extension candidates. Maximal degree in co-relation 91059. Up to 8631 conditions per place. [2024-06-27 20:34:54,437 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 23 changer transitions 0/427 dead transitions. [2024-06-27 20:34:54,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 427 transitions, 6772 flow [2024-06-27 20:34:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:34:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:34:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 20:34:54,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:34:54,438 INFO L175 Difference]: Start difference. First operand has 319 places, 417 transitions, 5918 flow. Second operand 7 states and 119 transitions. [2024-06-27 20:34:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 427 transitions, 6772 flow [2024-06-27 20:34:58,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 427 transitions, 6616 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:58,357 INFO L231 Difference]: Finished difference. Result has 318 places, 417 transitions, 5814 flow [2024-06-27 20:34:58,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5762, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5814, PETRI_PLACES=318, PETRI_TRANSITIONS=417} [2024-06-27 20:34:58,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:34:58,358 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 417 transitions, 5814 flow [2024-06-27 20:34:58,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:58,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:58,358 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 20:34:58,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:34:58,358 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:58,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:58,359 INFO L85 PathProgramCache]: Analyzing trace with hash -41800288, now seen corresponding path program 4 times [2024-06-27 20:34:58,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:58,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654052607] [2024-06-27 20:34:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:58,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654052607] [2024-06-27 20:34:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654052607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:59,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:34:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364450494] [2024-06-27 20:34:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:59,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:34:59,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:34:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:34:59,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:34:59,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 417 transitions, 5814 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:59,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:59,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:34:59,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:01,664 INFO L124 PetriNetUnfolderBase]: 5734/8900 cut-off events. [2024-06-27 20:35:01,664 INFO L125 PetriNetUnfolderBase]: For 1825031/1825045 co-relation queries the response was YES. [2024-06-27 20:35:01,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92890 conditions, 8900 events. 5734/8900 cut-off events. For 1825031/1825045 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 54490 event pairs, 1452 based on Foata normal form. 18/8912 useless extension candidates. Maximal degree in co-relation 92732. Up to 8541 conditions per place. [2024-06-27 20:35:01,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 408 selfloop transitions, 36 changer transitions 0/456 dead transitions. [2024-06-27 20:35:01,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 456 transitions, 7002 flow [2024-06-27 20:35:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:01,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:35:01,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-27 20:35:01,803 INFO L175 Difference]: Start difference. First operand has 318 places, 417 transitions, 5814 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:35:01,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 456 transitions, 7002 flow [2024-06-27 20:35:05,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 456 transitions, 6905 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:35:05,468 INFO L231 Difference]: Finished difference. Result has 321 places, 419 transitions, 5994 flow [2024-06-27 20:35:05,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5994, PETRI_PLACES=321, PETRI_TRANSITIONS=419} [2024-06-27 20:35:05,468 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 20:35:05,468 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 419 transitions, 5994 flow [2024-06-27 20:35:05,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:05,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:05,468 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 20:35:05,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:35:05,469 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:05,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:05,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2021026852, now seen corresponding path program 5 times [2024-06-27 20:35:05,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:05,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665198358] [2024-06-27 20:35:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:05,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665198358] [2024-06-27 20:35:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665198358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:06,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:06,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:35:06,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623923799] [2024-06-27 20:35:06,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:06,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:35:06,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:35:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:35:06,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 419 transitions, 5994 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:06,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:06,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:09,028 INFO L124 PetriNetUnfolderBase]: 5795/9003 cut-off events. [2024-06-27 20:35:09,028 INFO L125 PetriNetUnfolderBase]: For 1856892/1856906 co-relation queries the response was YES. [2024-06-27 20:35:09,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94486 conditions, 9003 events. 5795/9003 cut-off events. For 1856892/1856906 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 55402 event pairs, 1484 based on Foata normal form. 18/9015 useless extension candidates. Maximal degree in co-relation 94327. Up to 8479 conditions per place. [2024-06-27 20:35:09,168 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 387 selfloop transitions, 59 changer transitions 0/458 dead transitions. [2024-06-27 20:35:09,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 7190 flow [2024-06-27 20:35:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:35:09,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:35:09,169 INFO L175 Difference]: Start difference. First operand has 321 places, 419 transitions, 5994 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:35:09,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 7190 flow [2024-06-27 20:35:13,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 458 transitions, 6942 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:13,262 INFO L231 Difference]: Finished difference. Result has 322 places, 421 transitions, 6072 flow [2024-06-27 20:35:13,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5746, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6072, PETRI_PLACES=322, PETRI_TRANSITIONS=421} [2024-06-27 20:35:13,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 20:35:13,262 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 421 transitions, 6072 flow [2024-06-27 20:35:13,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:13,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:13,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:13,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:35:13,263 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:13,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1279829132, now seen corresponding path program 6 times [2024-06-27 20:35:13,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:13,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246180030] [2024-06-27 20:35:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:13,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:14,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:14,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246180030] [2024-06-27 20:35:14,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246180030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:14,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:14,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:35:14,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993454226] [2024-06-27 20:35:14,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:14,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:35:14,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:14,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:35:14,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:35:14,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:14,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 421 transitions, 6072 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:14,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:14,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:14,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:16,856 INFO L124 PetriNetUnfolderBase]: 5856/9106 cut-off events. [2024-06-27 20:35:16,856 INFO L125 PetriNetUnfolderBase]: For 1894198/1894212 co-relation queries the response was YES. [2024-06-27 20:35:16,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95484 conditions, 9106 events. 5856/9106 cut-off events. For 1894198/1894212 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 56334 event pairs, 1497 based on Foata normal form. 18/9118 useless extension candidates. Maximal degree in co-relation 95325. Up to 8604 conditions per place. [2024-06-27 20:35:17,001 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 397 selfloop transitions, 53 changer transitions 0/462 dead transitions. [2024-06-27 20:35:17,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 462 transitions, 7473 flow [2024-06-27 20:35:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:35:17,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:35:17,002 INFO L175 Difference]: Start difference. First operand has 322 places, 421 transitions, 6072 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:35:17,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 462 transitions, 7473 flow [2024-06-27 20:35:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 462 transitions, 7183 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:20,779 INFO L231 Difference]: Finished difference. Result has 324 places, 423 transitions, 6090 flow [2024-06-27 20:35:20,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5782, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6090, PETRI_PLACES=324, PETRI_TRANSITIONS=423} [2024-06-27 20:35:20,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 20:35:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 423 transitions, 6090 flow [2024-06-27 20:35:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:20,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:20,780 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 20:35:20,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:35:20,780 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:20,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1948574860, now seen corresponding path program 7 times [2024-06-27 20:35:20,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:20,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665794458] [2024-06-27 20:35:20,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:20,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665794458] [2024-06-27 20:35:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665794458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:21,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:21,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:21,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867411299] [2024-06-27 20:35:21,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:21,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:21,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:21,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:21,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 423 transitions, 6090 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:21,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:21,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:21,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:24,017 INFO L124 PetriNetUnfolderBase]: 5978/9312 cut-off events. [2024-06-27 20:35:24,017 INFO L125 PetriNetUnfolderBase]: For 2038496/2038510 co-relation queries the response was YES. [2024-06-27 20:35:24,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97889 conditions, 9312 events. 5978/9312 cut-off events. For 2038496/2038510 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58060 event pairs, 1528 based on Foata normal form. 36/9342 useless extension candidates. Maximal degree in co-relation 97729. Up to 8819 conditions per place. [2024-06-27 20:35:24,164 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 401 selfloop transitions, 50 changer transitions 0/463 dead transitions. [2024-06-27 20:35:24,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 463 transitions, 7359 flow [2024-06-27 20:35:24,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:35:24,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:35:24,167 INFO L175 Difference]: Start difference. First operand has 324 places, 423 transitions, 6090 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:35:24,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 463 transitions, 7359 flow [2024-06-27 20:35:28,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 463 transitions, 7088 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:28,416 INFO L231 Difference]: Finished difference. Result has 326 places, 426 transitions, 6191 flow [2024-06-27 20:35:28,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6191, PETRI_PLACES=326, PETRI_TRANSITIONS=426} [2024-06-27 20:35:28,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-27 20:35:28,417 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 426 transitions, 6191 flow [2024-06-27 20:35:28,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:28,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:28,417 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 20:35:28,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:35:28,418 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:28,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1973082878, now seen corresponding path program 8 times [2024-06-27 20:35:28,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:28,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752828005] [2024-06-27 20:35:28,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:28,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752828005] [2024-06-27 20:35:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752828005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549279416] [2024-06-27 20:35:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:29,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 426 transitions, 6191 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:29,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:29,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:29,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:31,951 INFO L124 PetriNetUnfolderBase]: 5978/9312 cut-off events. [2024-06-27 20:35:31,951 INFO L125 PetriNetUnfolderBase]: For 1936978/1936992 co-relation queries the response was YES. [2024-06-27 20:35:32,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96289 conditions, 9312 events. 5978/9312 cut-off events. For 1936978/1936992 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58080 event pairs, 1512 based on Foata normal form. 18/9324 useless extension candidates. Maximal degree in co-relation 96128. Up to 8729 conditions per place. [2024-06-27 20:35:32,075 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 394 selfloop transitions, 61 changer transitions 0/467 dead transitions. [2024-06-27 20:35:32,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 467 transitions, 7619 flow [2024-06-27 20:35:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:32,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:35:32,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:35:32,076 INFO L175 Difference]: Start difference. First operand has 326 places, 426 transitions, 6191 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:35:32,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 467 transitions, 7619 flow [2024-06-27 20:35:36,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 467 transitions, 7300 flow, removed 112 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:36,254 INFO L231 Difference]: Finished difference. Result has 328 places, 428 transitions, 6211 flow [2024-06-27 20:35:36,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6211, PETRI_PLACES=328, PETRI_TRANSITIONS=428} [2024-06-27 20:35:36,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 20:35:36,255 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 428 transitions, 6211 flow [2024-06-27 20:35:36,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:36,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:36,255 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 20:35:36,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:35:36,255 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:36,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:36,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2145803408, now seen corresponding path program 9 times [2024-06-27 20:35:36,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:36,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679215572] [2024-06-27 20:35:36,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:36,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:37,452 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 20:35:37,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:37,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679215572] [2024-06-27 20:35:37,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679215572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:37,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:37,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:35:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672289560] [2024-06-27 20:35:37,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:37,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:35:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:35:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:35:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:37,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 428 transitions, 6211 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:37,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:37,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:37,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:39,923 INFO L124 PetriNetUnfolderBase]: 5985/9325 cut-off events. [2024-06-27 20:35:39,923 INFO L125 PetriNetUnfolderBase]: For 1868272/1868286 co-relation queries the response was YES. [2024-06-27 20:35:40,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93765 conditions, 9325 events. 5985/9325 cut-off events. For 1868272/1868286 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 58085 event pairs, 1513 based on Foata normal form. 18/9337 useless extension candidates. Maximal degree in co-relation 93603. Up to 8758 conditions per place. [2024-06-27 20:35:40,060 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 388 selfloop transitions, 68 changer transitions 0/468 dead transitions. [2024-06-27 20:35:40,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 468 transitions, 7542 flow [2024-06-27 20:35:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:35:40,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:35:40,061 INFO L175 Difference]: Start difference. First operand has 328 places, 428 transitions, 6211 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:35:40,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 468 transitions, 7542 flow [2024-06-27 20:35:45,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 468 transitions, 7237 flow, removed 93 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:45,082 INFO L231 Difference]: Finished difference. Result has 329 places, 428 transitions, 5950 flow [2024-06-27 20:35:45,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5950, PETRI_PLACES=329, PETRI_TRANSITIONS=428} [2024-06-27 20:35:45,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:35:45,083 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 428 transitions, 5950 flow [2024-06-27 20:35:45,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:45,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:45,083 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 20:35:45,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:35:45,083 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 20:35:45,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash -166844822, now seen corresponding path program 2 times [2024-06-27 20:35:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:45,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947522266] [2024-06-27 20:35:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:45,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:45,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947522266] [2024-06-27 20:35:45,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947522266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:45,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:45,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:45,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491164561] [2024-06-27 20:35:45,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:45,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:45,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:45,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:45,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:45,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:45,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 428 transitions, 5950 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:45,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:45,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:45,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:47,763 INFO L124 PetriNetUnfolderBase]: 5890/9188 cut-off events. [2024-06-27 20:35:47,763 INFO L125 PetriNetUnfolderBase]: For 1854995/1855106 co-relation queries the response was YES. [2024-06-27 20:35:47,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93220 conditions, 9188 events. 5890/9188 cut-off events. For 1854995/1855106 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57541 event pairs, 1565 based on Foata normal form. 3/9096 useless extension candidates. Maximal degree in co-relation 93057. Up to 8978 conditions per place. [2024-06-27 20:35:47,909 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 403 selfloop transitions, 22 changer transitions 0/450 dead transitions. [2024-06-27 20:35:47,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 450 transitions, 7162 flow [2024-06-27 20:35:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:35:47,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 20:35:47,910 INFO L175 Difference]: Start difference. First operand has 329 places, 428 transitions, 5950 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:35:47,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 450 transitions, 7162 flow [2024-06-27 20:35:52,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 450 transitions, 6817 flow, removed 89 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:52,580 INFO L231 Difference]: Finished difference. Result has 328 places, 434 transitions, 5781 flow [2024-06-27 20:35:52,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5781, PETRI_PLACES=328, PETRI_TRANSITIONS=434} [2024-06-27 20:35:52,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-27 20:35:52,581 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 434 transitions, 5781 flow [2024-06-27 20:35:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:52,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:52,581 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 20:35:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:35:52,581 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 20:35:52,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:52,581 INFO L85 PathProgramCache]: Analyzing trace with hash -693238772, now seen corresponding path program 3 times [2024-06-27 20:35:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128884364] [2024-06-27 20:35:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128884364] [2024-06-27 20:35:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128884364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:53,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:53,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:53,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129888910] [2024-06-27 20:35:53,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:53,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:53,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:53,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 434 transitions, 5781 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:53,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:53,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:53,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:55,296 INFO L124 PetriNetUnfolderBase]: 5873/9165 cut-off events. [2024-06-27 20:35:55,297 INFO L125 PetriNetUnfolderBase]: For 1822061/1822142 co-relation queries the response was YES. [2024-06-27 20:35:55,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91171 conditions, 9165 events. 5873/9165 cut-off events. For 1822061/1822142 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 57448 event pairs, 1559 based on Foata normal form. 4/9076 useless extension candidates. Maximal degree in co-relation 91008. Up to 8979 conditions per place. [2024-06-27 20:35:55,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 405 selfloop transitions, 17 changer transitions 0/447 dead transitions. [2024-06-27 20:35:55,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 447 transitions, 6657 flow [2024-06-27 20:35:55,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:35:55,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:35:55,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:35:55,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:35:55,445 INFO L175 Difference]: Start difference. First operand has 328 places, 434 transitions, 5781 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:35:55,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 447 transitions, 6657 flow [2024-06-27 20:35:58,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 447 transitions, 6541 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 20:35:58,142 INFO L231 Difference]: Finished difference. Result has 332 places, 434 transitions, 5705 flow [2024-06-27 20:35:58,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5665, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=332, PETRI_TRANSITIONS=434} [2024-06-27 20:35:58,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:35:58,142 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 434 transitions, 5705 flow [2024-06-27 20:35:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:58,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:58,143 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 20:35:58,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:35:58,143 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 20:35:58,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:58,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1203350262, now seen corresponding path program 4 times [2024-06-27 20:35:58,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:58,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940769589] [2024-06-27 20:35:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:58,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:58,835 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 20:35:58,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:58,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940769589] [2024-06-27 20:35:58,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940769589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:58,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:58,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:35:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400694351] [2024-06-27 20:35:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:58,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:35:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:35:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:35:58,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:35:58,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 434 transitions, 5705 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:58,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:58,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:35:58,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:00,780 INFO L124 PetriNetUnfolderBase]: 5861/9147 cut-off events. [2024-06-27 20:36:00,781 INFO L125 PetriNetUnfolderBase]: For 1820920/1820981 co-relation queries the response was YES. [2024-06-27 20:36:00,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90512 conditions, 9147 events. 5861/9147 cut-off events. For 1820920/1820981 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 57263 event pairs, 1554 based on Foata normal form. 3/9060 useless extension candidates. Maximal degree in co-relation 90348. Up to 8935 conditions per place. [2024-06-27 20:36:00,920 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 31 changer transitions 0/449 dead transitions. [2024-06-27 20:36:00,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 449 transitions, 6591 flow [2024-06-27 20:36:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:36:00,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 20:36:00,921 INFO L175 Difference]: Start difference. First operand has 332 places, 434 transitions, 5705 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:36:00,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 449 transitions, 6591 flow [2024-06-27 20:36:04,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 449 transitions, 6517 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:04,351 INFO L231 Difference]: Finished difference. Result has 333 places, 434 transitions, 5699 flow [2024-06-27 20:36:04,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5699, PETRI_PLACES=333, PETRI_TRANSITIONS=434} [2024-06-27 20:36:04,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:36:04,352 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 434 transitions, 5699 flow [2024-06-27 20:36:04,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:04,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:04,352 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 20:36:04,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:36:04,352 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 20:36:04,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1203362166, now seen corresponding path program 4 times [2024-06-27 20:36:04,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:04,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600458922] [2024-06-27 20:36:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:05,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:05,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:05,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600458922] [2024-06-27 20:36:05,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600458922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:05,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:05,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:05,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516062385] [2024-06-27 20:36:05,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:05,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:05,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:05,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:05,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:36:05,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 434 transitions, 5699 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:05,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:05,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:36:05,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:07,326 INFO L124 PetriNetUnfolderBase]: 6026/9383 cut-off events. [2024-06-27 20:36:07,327 INFO L125 PetriNetUnfolderBase]: For 1820890/1820892 co-relation queries the response was YES. [2024-06-27 20:36:07,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91891 conditions, 9383 events. 6026/9383 cut-off events. For 1820890/1820892 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 58432 event pairs, 1574 based on Foata normal form. 1/9379 useless extension candidates. Maximal degree in co-relation 91726. Up to 9241 conditions per place. [2024-06-27 20:36:07,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 416 selfloop transitions, 17 changer transitions 0/445 dead transitions. [2024-06-27 20:36:07,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 445 transitions, 6591 flow [2024-06-27 20:36:07,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:07,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:07,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:36:07,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:36:07,496 INFO L175 Difference]: Start difference. First operand has 333 places, 434 transitions, 5699 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:36:07,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 445 transitions, 6591 flow [2024-06-27 20:36:11,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 445 transitions, 6446 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 20:36:11,425 INFO L231 Difference]: Finished difference. Result has 333 places, 434 transitions, 5594 flow [2024-06-27 20:36:11,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5554, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5594, PETRI_PLACES=333, PETRI_TRANSITIONS=434} [2024-06-27 20:36:11,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:36:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 434 transitions, 5594 flow [2024-06-27 20:36:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:11,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:11,426 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 20:36:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:36:11,426 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 20:36:11,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:11,426 INFO L85 PathProgramCache]: Analyzing trace with hash -609396599, now seen corresponding path program 1 times [2024-06-27 20:36:11,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:11,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947170042] [2024-06-27 20:36:11,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:11,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:11,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:11,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947170042] [2024-06-27 20:36:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947170042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:11,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:11,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:11,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52079826] [2024-06-27 20:36:11,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:11,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:11,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:12,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:12,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 434 transitions, 5594 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:12,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:12,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:12,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:14,193 INFO L124 PetriNetUnfolderBase]: 6170/9533 cut-off events. [2024-06-27 20:36:14,193 INFO L125 PetriNetUnfolderBase]: For 1860048/1860048 co-relation queries the response was YES. [2024-06-27 20:36:14,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93039 conditions, 9533 events. 6170/9533 cut-off events. For 1860048/1860048 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 58670 event pairs, 1625 based on Foata normal form. 2/9534 useless extension candidates. Maximal degree in co-relation 92874. Up to 9428 conditions per place. [2024-06-27 20:36:14,350 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 414 selfloop transitions, 40 changer transitions 0/457 dead transitions. [2024-06-27 20:36:14,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 457 transitions, 6810 flow [2024-06-27 20:36:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:36:14,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 20:36:14,351 INFO L175 Difference]: Start difference. First operand has 333 places, 434 transitions, 5594 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:36:14,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 457 transitions, 6810 flow [2024-06-27 20:36:19,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 457 transitions, 6725 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 20:36:19,209 INFO L231 Difference]: Finished difference. Result has 332 places, 437 transitions, 5640 flow [2024-06-27 20:36:19,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5640, PETRI_PLACES=332, PETRI_TRANSITIONS=437} [2024-06-27 20:36:19,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:36:19,209 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 437 transitions, 5640 flow [2024-06-27 20:36:19,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:19,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:19,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:19,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:36:19,210 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 20:36:19,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash -609391019, now seen corresponding path program 2 times [2024-06-27 20:36:19,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:19,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996828119] [2024-06-27 20:36:19,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:19,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:19,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996828119] [2024-06-27 20:36:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996828119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:19,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:19,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:19,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33367895] [2024-06-27 20:36:19,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:19,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:19,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:19,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:19,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:19,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 437 transitions, 5640 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:19,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:19,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:19,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:21,918 INFO L124 PetriNetUnfolderBase]: 6180/9547 cut-off events. [2024-06-27 20:36:21,918 INFO L125 PetriNetUnfolderBase]: For 1893674/1893674 co-relation queries the response was YES. [2024-06-27 20:36:22,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93511 conditions, 9547 events. 6180/9547 cut-off events. For 1893674/1893674 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 58757 event pairs, 1625 based on Foata normal form. 2/9548 useless extension candidates. Maximal degree in co-relation 93345. Up to 9438 conditions per place. [2024-06-27 20:36:22,069 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 414 selfloop transitions, 40 changer transitions 0/457 dead transitions. [2024-06-27 20:36:22,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 457 transitions, 6856 flow [2024-06-27 20:36:22,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:36:22,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-27 20:36:22,070 INFO L175 Difference]: Start difference. First operand has 332 places, 437 transitions, 5640 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:36:22,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 457 transitions, 6856 flow [2024-06-27 20:36:27,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 457 transitions, 6718 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:36:27,048 INFO L231 Difference]: Finished difference. Result has 333 places, 440 transitions, 5639 flow [2024-06-27 20:36:27,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5639, PETRI_PLACES=333, PETRI_TRANSITIONS=440} [2024-06-27 20:36:27,049 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 20:36:27,049 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 440 transitions, 5639 flow [2024-06-27 20:36:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:27,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:27,049 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 20:36:27,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:36:27,049 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 20:36:27,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash -609390802, now seen corresponding path program 1 times [2024-06-27 20:36:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430873627] [2024-06-27 20:36:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:27,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:27,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430873627] [2024-06-27 20:36:27,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430873627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:27,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:27,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879359549] [2024-06-27 20:36:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:27,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:27,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:27,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 440 transitions, 5639 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 20:36:27,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:27,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:27,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:29,938 INFO L124 PetriNetUnfolderBase]: 6225/9610 cut-off events. [2024-06-27 20:36:29,938 INFO L125 PetriNetUnfolderBase]: For 1966714/1966714 co-relation queries the response was YES. [2024-06-27 20:36:30,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94261 conditions, 9610 events. 6225/9610 cut-off events. For 1966714/1966714 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 59151 event pairs, 1619 based on Foata normal form. 9/9618 useless extension candidates. Maximal degree in co-relation 94095. Up to 9375 conditions per place. [2024-06-27 20:36:30,091 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 46 changer transitions 0/471 dead transitions. [2024-06-27 20:36:30,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 471 transitions, 7035 flow [2024-06-27 20:36:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:30,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:36:30,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-27 20:36:30,092 INFO L175 Difference]: Start difference. First operand has 333 places, 440 transitions, 5639 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:36:30,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 471 transitions, 7035 flow [2024-06-27 20:36:34,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 471 transitions, 6955 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:34,821 INFO L231 Difference]: Finished difference. Result has 337 places, 447 transitions, 5798 flow [2024-06-27 20:36:34,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=337, PETRI_TRANSITIONS=447} [2024-06-27 20:36:34,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 20:36:34,821 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 447 transitions, 5798 flow [2024-06-27 20:36:34,821 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 20:36:34,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:34,821 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 20:36:34,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:36:34,821 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 20:36:34,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:34,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2051531854, now seen corresponding path program 2 times [2024-06-27 20:36:34,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:34,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912916136] [2024-06-27 20:36:34,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:34,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:35,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:35,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912916136] [2024-06-27 20:36:35,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912916136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:35,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:35,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:35,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820175545] [2024-06-27 20:36:35,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:35,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:35,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:35,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:35,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:35,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 447 transitions, 5798 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 20:36:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:37,924 INFO L124 PetriNetUnfolderBase]: 6264/9665 cut-off events. [2024-06-27 20:36:37,924 INFO L125 PetriNetUnfolderBase]: For 1994128/1994130 co-relation queries the response was YES. [2024-06-27 20:36:38,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96257 conditions, 9665 events. 6264/9665 cut-off events. For 1994128/1994130 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 59478 event pairs, 1640 based on Foata normal form. 3/9667 useless extension candidates. Maximal degree in co-relation 96090. Up to 9395 conditions per place. [2024-06-27 20:36:38,079 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 59 changer transitions 0/480 dead transitions. [2024-06-27 20:36:38,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 480 transitions, 7704 flow [2024-06-27 20:36:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:36:38,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:36:38,080 INFO L175 Difference]: Start difference. First operand has 337 places, 447 transitions, 5798 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:36:38,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 480 transitions, 7704 flow [2024-06-27 20:36:42,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 480 transitions, 7581 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-27 20:36:42,252 INFO L231 Difference]: Finished difference. Result has 341 places, 456 transitions, 6041 flow [2024-06-27 20:36:42,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=341, PETRI_TRANSITIONS=456} [2024-06-27 20:36:42,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 20:36:42,253 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 456 transitions, 6041 flow [2024-06-27 20:36:42,253 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 20:36:42,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:42,253 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 20:36:42,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:36:42,253 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 20:36:42,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1486306901, now seen corresponding path program 3 times [2024-06-27 20:36:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:42,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443549755] [2024-06-27 20:36:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:42,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:42,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:42,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:42,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443549755] [2024-06-27 20:36:42,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443549755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:42,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:36:42,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558361246] [2024-06-27 20:36:42,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:36:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:36:42,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:36:42,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:42,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 456 transitions, 6041 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:42,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:42,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:42,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:44,988 INFO L124 PetriNetUnfolderBase]: 6258/9657 cut-off events. [2024-06-27 20:36:44,988 INFO L125 PetriNetUnfolderBase]: For 2013659/2013661 co-relation queries the response was YES. [2024-06-27 20:36:45,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96299 conditions, 9657 events. 6258/9657 cut-off events. For 2013659/2013661 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 59404 event pairs, 1641 based on Foata normal form. 2/9658 useless extension candidates. Maximal degree in co-relation 96130. Up to 9550 conditions per place. [2024-06-27 20:36:45,142 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 427 selfloop transitions, 38 changer transitions 0/468 dead transitions. [2024-06-27 20:36:45,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 468 transitions, 7003 flow [2024-06-27 20:36:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:36:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:36:45,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:36:45,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 20:36:45,143 INFO L175 Difference]: Start difference. First operand has 341 places, 456 transitions, 6041 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:36:45,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 468 transitions, 7003 flow [2024-06-27 20:36:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 468 transitions, 6834 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-27 20:36:49,568 INFO L231 Difference]: Finished difference. Result has 346 places, 456 transitions, 5954 flow [2024-06-27 20:36:49,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5954, PETRI_PLACES=346, PETRI_TRANSITIONS=456} [2024-06-27 20:36:49,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:36:49,569 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 456 transitions, 5954 flow [2024-06-27 20:36:49,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:49,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:49,569 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 20:36:49,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:36:49,569 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 20:36:49,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:49,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2051264944, now seen corresponding path program 3 times [2024-06-27 20:36:49,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:49,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41593543] [2024-06-27 20:36:49,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:49,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:50,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:50,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41593543] [2024-06-27 20:36:50,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41593543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:50,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:50,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:50,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084345308] [2024-06-27 20:36:50,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:50,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:50,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 456 transitions, 5954 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 20:36:50,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:50,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:50,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:52,545 INFO L124 PetriNetUnfolderBase]: 6249/9645 cut-off events. [2024-06-27 20:36:52,545 INFO L125 PetriNetUnfolderBase]: For 2024890/2024892 co-relation queries the response was YES. [2024-06-27 20:36:52,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95699 conditions, 9645 events. 6249/9645 cut-off events. For 2024890/2024892 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 59311 event pairs, 1639 based on Foata normal form. 3/9647 useless extension candidates. Maximal degree in co-relation 95527. Up to 9388 conditions per place. [2024-06-27 20:36:52,697 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 61 changer transitions 0/478 dead transitions. [2024-06-27 20:36:52,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 478 transitions, 7404 flow [2024-06-27 20:36:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:36:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:36:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:36:52,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:36:52,698 INFO L175 Difference]: Start difference. First operand has 346 places, 456 transitions, 5954 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:36:52,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 478 transitions, 7404 flow [2024-06-27 20:36:57,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 478 transitions, 7250 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:57,936 INFO L231 Difference]: Finished difference. Result has 347 places, 456 transitions, 5929 flow [2024-06-27 20:36:57,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5929, PETRI_PLACES=347, PETRI_TRANSITIONS=456} [2024-06-27 20:36:57,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-27 20:36:57,937 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 456 transitions, 5929 flow [2024-06-27 20:36:57,937 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 20:36:57,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:57,937 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 20:36:57,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:36:57,937 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 20:36:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 586719022, now seen corresponding path program 4 times [2024-06-27 20:36:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86992494] [2024-06-27 20:36:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:58,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:58,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86992494] [2024-06-27 20:36:58,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86992494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:58,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:58,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:36:58,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009625749] [2024-06-27 20:36:58,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:58,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:36:58,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:36:58,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:36:58,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:36:58,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 456 transitions, 5929 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 20:36:58,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:58,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:36:58,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:00,876 INFO L124 PetriNetUnfolderBase]: 6240/9633 cut-off events. [2024-06-27 20:37:00,876 INFO L125 PetriNetUnfolderBase]: For 2040742/2040744 co-relation queries the response was YES. [2024-06-27 20:37:00,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95612 conditions, 9633 events. 6240/9633 cut-off events. For 2040742/2040744 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 59316 event pairs, 1637 based on Foata normal form. 3/9635 useless extension candidates. Maximal degree in co-relation 95439. Up to 9384 conditions per place. [2024-06-27 20:37:01,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 57 changer transitions 0/478 dead transitions. [2024-06-27 20:37:01,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 478 transitions, 7161 flow [2024-06-27 20:37:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:37:01,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:37:01,038 INFO L175 Difference]: Start difference. First operand has 347 places, 456 transitions, 5929 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:37:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 478 transitions, 7161 flow [2024-06-27 20:37:07,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 478 transitions, 6993 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:07,099 INFO L231 Difference]: Finished difference. Result has 348 places, 456 transitions, 5881 flow [2024-06-27 20:37:07,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5761, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5881, PETRI_PLACES=348, PETRI_TRANSITIONS=456} [2024-06-27 20:37:07,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 20:37:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 456 transitions, 5881 flow [2024-06-27 20:37:07,100 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 20:37:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:07,100 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 20:37:07,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:37:07,101 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 20:37:07,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:07,101 INFO L85 PathProgramCache]: Analyzing trace with hash -609087060, now seen corresponding path program 1 times [2024-06-27 20:37:07,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:07,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353820809] [2024-06-27 20:37:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:07,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:08,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:08,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353820809] [2024-06-27 20:37:08,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353820809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:08,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:08,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933316556] [2024-06-27 20:37:08,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:08,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:08,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:08,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:08,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 456 transitions, 5881 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:08,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:08,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:08,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:10,614 INFO L124 PetriNetUnfolderBase]: 6109/9503 cut-off events. [2024-06-27 20:37:10,614 INFO L125 PetriNetUnfolderBase]: For 2068661/2068663 co-relation queries the response was YES. [2024-06-27 20:37:10,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94859 conditions, 9503 events. 6109/9503 cut-off events. For 2068661/2068663 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58845 event pairs, 1426 based on Foata normal form. 2/9500 useless extension candidates. Maximal degree in co-relation 94686. Up to 9243 conditions per place. [2024-06-27 20:37:10,752 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 46 changer transitions 0/494 dead transitions. [2024-06-27 20:37:10,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 494 transitions, 7208 flow [2024-06-27 20:37:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:37:10,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:37:10,753 INFO L175 Difference]: Start difference. First operand has 348 places, 456 transitions, 5881 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:37:10,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 494 transitions, 7208 flow [2024-06-27 20:37:15,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 494 transitions, 7050 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:15,195 INFO L231 Difference]: Finished difference. Result has 349 places, 458 transitions, 5873 flow [2024-06-27 20:37:15,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5723, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5873, PETRI_PLACES=349, PETRI_TRANSITIONS=458} [2024-06-27 20:37:15,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-27 20:37:15,195 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 458 transitions, 5873 flow [2024-06-27 20:37:15,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:15,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:15,195 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 20:37:15,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:37:15,196 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 20:37:15,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:15,196 INFO L85 PathProgramCache]: Analyzing trace with hash -608848050, now seen corresponding path program 2 times [2024-06-27 20:37:15,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:15,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938814917] [2024-06-27 20:37:15,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:15,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:16,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938814917] [2024-06-27 20:37:16,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938814917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:16,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:16,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693594832] [2024-06-27 20:37:16,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:16,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:16,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:16,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:16,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 458 transitions, 5873 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:16,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:16,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:16,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:18,429 INFO L124 PetriNetUnfolderBase]: 6117/9515 cut-off events. [2024-06-27 20:37:18,429 INFO L125 PetriNetUnfolderBase]: For 2103558/2103560 co-relation queries the response was YES. [2024-06-27 20:37:18,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95195 conditions, 9515 events. 6117/9515 cut-off events. For 2103558/2103560 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 59263 event pairs, 1571 based on Foata normal form. 2/9512 useless extension candidates. Maximal degree in co-relation 95021. Up to 9300 conditions per place. [2024-06-27 20:37:18,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 44 changer transitions 0/492 dead transitions. [2024-06-27 20:37:18,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 492 transitions, 6966 flow [2024-06-27 20:37:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:37:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:37:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:37:18,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:37:18,596 INFO L175 Difference]: Start difference. First operand has 349 places, 458 transitions, 5873 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:37:18,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 492 transitions, 6966 flow [2024-06-27 20:37:23,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 492 transitions, 6743 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:23,841 INFO L231 Difference]: Finished difference. Result has 351 places, 460 transitions, 5805 flow [2024-06-27 20:37:23,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5805, PETRI_PLACES=351, PETRI_TRANSITIONS=460} [2024-06-27 20:37:23,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-27 20:37:23,842 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 460 transitions, 5805 flow [2024-06-27 20:37:23,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:23,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:23,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:23,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:37:23,842 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 20:37:23,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:23,843 INFO L85 PathProgramCache]: Analyzing trace with hash -608847740, now seen corresponding path program 1 times [2024-06-27 20:37:23,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:23,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318366655] [2024-06-27 20:37:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:23,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:24,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:24,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318366655] [2024-06-27 20:37:24,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318366655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:24,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:24,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:24,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123646794] [2024-06-27 20:37:24,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:24,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:24,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:24,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:24,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:24,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 460 transitions, 5805 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:24,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:24,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:24,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:26,950 INFO L124 PetriNetUnfolderBase]: 6261/9663 cut-off events. [2024-06-27 20:37:26,950 INFO L125 PetriNetUnfolderBase]: For 2133127/2133127 co-relation queries the response was YES. [2024-06-27 20:37:27,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95925 conditions, 9663 events. 6261/9663 cut-off events. For 2133127/2133127 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 59492 event pairs, 1612 based on Foata normal form. 1/9663 useless extension candidates. Maximal degree in co-relation 95752. Up to 9532 conditions per place. [2024-06-27 20:37:27,126 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 444 selfloop transitions, 57 changer transitions 0/504 dead transitions. [2024-06-27 20:37:27,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 504 transitions, 7272 flow [2024-06-27 20:37:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:37:27,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 20:37:27,127 INFO L175 Difference]: Start difference. First operand has 351 places, 460 transitions, 5805 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:37:27,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 504 transitions, 7272 flow [2024-06-27 20:37:31,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 504 transitions, 7162 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:31,907 INFO L231 Difference]: Finished difference. Result has 353 places, 473 transitions, 5998 flow [2024-06-27 20:37:31,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5998, PETRI_PLACES=353, PETRI_TRANSITIONS=473} [2024-06-27 20:37:31,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 20:37:31,907 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 473 transitions, 5998 flow [2024-06-27 20:37:31,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:31,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:31,907 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 20:37:31,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:37:31,907 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 20:37:31,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash -606227124, now seen corresponding path program 1 times [2024-06-27 20:37:31,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:31,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646348860] [2024-06-27 20:37:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:31,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:32,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646348860] [2024-06-27 20:37:32,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646348860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:32,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:32,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866235798] [2024-06-27 20:37:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:32,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:32,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 473 transitions, 5998 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:32,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:32,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:32,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:35,157 INFO L124 PetriNetUnfolderBase]: 6142/9540 cut-off events. [2024-06-27 20:37:35,157 INFO L125 PetriNetUnfolderBase]: For 2175350/2175352 co-relation queries the response was YES. [2024-06-27 20:37:35,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95972 conditions, 9540 events. 6142/9540 cut-off events. For 2175350/2175352 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 59367 event pairs, 1563 based on Foata normal form. 3/9532 useless extension candidates. Maximal degree in co-relation 95797. Up to 9304 conditions per place. [2024-06-27 20:37:35,298 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 448 selfloop transitions, 38 changer transitions 0/505 dead transitions. [2024-06-27 20:37:35,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 505 transitions, 7323 flow [2024-06-27 20:37:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:37:35,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:37:35,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:37:35,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:37:35,299 INFO L175 Difference]: Start difference. First operand has 353 places, 473 transitions, 5998 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:37:35,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 505 transitions, 7323 flow [2024-06-27 20:37:40,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 505 transitions, 7235 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 20:37:40,024 INFO L231 Difference]: Finished difference. Result has 358 places, 476 transitions, 6043 flow [2024-06-27 20:37:40,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6043, PETRI_PLACES=358, PETRI_TRANSITIONS=476} [2024-06-27 20:37:40,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:37:40,024 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 476 transitions, 6043 flow [2024-06-27 20:37:40,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:40,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:40,025 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 20:37:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:37:40,025 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 20:37:40,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:40,025 INFO L85 PathProgramCache]: Analyzing trace with hash -600513204, now seen corresponding path program 2 times [2024-06-27 20:37:40,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:40,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032464740] [2024-06-27 20:37:40,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:40,840 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 20:37:40,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032464740] [2024-06-27 20:37:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032464740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:40,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:37:40,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776264792] [2024-06-27 20:37:40,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:40,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:37:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:37:40,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:37:40,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:37:40,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 476 transitions, 6043 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:40,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:40,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:37:40,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:43,242 INFO L124 PetriNetUnfolderBase]: 6147/9547 cut-off events. [2024-06-27 20:37:43,242 INFO L125 PetriNetUnfolderBase]: For 2197322/2197324 co-relation queries the response was YES. [2024-06-27 20:37:43,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96397 conditions, 9547 events. 6147/9547 cut-off events. For 2197322/2197324 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 59364 event pairs, 1563 based on Foata normal form. 1/9537 useless extension candidates. Maximal degree in co-relation 96220. Up to 9308 conditions per place. [2024-06-27 20:37:43,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 449 selfloop transitions, 42 changer transitions 0/510 dead transitions. [2024-06-27 20:37:43,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 510 transitions, 7390 flow [2024-06-27 20:37:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:37:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:37:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:37:43,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:37:43,412 INFO L175 Difference]: Start difference. First operand has 358 places, 476 transitions, 6043 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:37:43,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 510 transitions, 7390 flow [2024-06-27 20:37:49,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 510 transitions, 7315 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:49,459 INFO L231 Difference]: Finished difference. Result has 363 places, 479 transitions, 6113 flow [2024-06-27 20:37:49,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6113, PETRI_PLACES=363, PETRI_TRANSITIONS=479} [2024-06-27 20:37:49,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 20:37:49,460 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 479 transitions, 6113 flow [2024-06-27 20:37:49,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:49,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:49,460 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 20:37:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:37:49,460 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 20:37:49,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash -730370438, now seen corresponding path program 2 times [2024-06-27 20:37:49,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:49,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637382838] [2024-06-27 20:37:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:49,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637382838] [2024-06-27 20:37:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637382838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:50,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:50,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538100117] [2024-06-27 20:37:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:50,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:37:50,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 479 transitions, 6113 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:50,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:50,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:37:50,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:52,483 INFO L124 PetriNetUnfolderBase]: 6275/9683 cut-off events. [2024-06-27 20:37:52,483 INFO L125 PetriNetUnfolderBase]: For 2231874/2231874 co-relation queries the response was YES. [2024-06-27 20:37:52,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97610 conditions, 9683 events. 6275/9683 cut-off events. For 2231874/2231874 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 59671 event pairs, 1608 based on Foata normal form. 1/9683 useless extension candidates. Maximal degree in co-relation 97432. Up to 9592 conditions per place. [2024-06-27 20:37:52,655 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 459 selfloop transitions, 47 changer transitions 0/509 dead transitions. [2024-06-27 20:37:52,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 509 transitions, 7250 flow [2024-06-27 20:37:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:37:52,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:37:52,656 INFO L175 Difference]: Start difference. First operand has 363 places, 479 transitions, 6113 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:37:52,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 509 transitions, 7250 flow [2024-06-27 20:37:59,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 509 transitions, 7150 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:59,285 INFO L231 Difference]: Finished difference. Result has 364 places, 485 transitions, 6184 flow [2024-06-27 20:37:59,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6184, PETRI_PLACES=364, PETRI_TRANSITIONS=485} [2024-06-27 20:37:59,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 20:37:59,285 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 485 transitions, 6184 flow [2024-06-27 20:37:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:59,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:59,285 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 20:37:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:37:59,285 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 20:37:59,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 279353772, now seen corresponding path program 3 times [2024-06-27 20:37:59,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:59,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792196653] [2024-06-27 20:37:59,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:59,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:00,216 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 20:38:00,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:00,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792196653] [2024-06-27 20:38:00,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792196653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:00,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:00,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:38:00,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135986435] [2024-06-27 20:38:00,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:00,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:38:00,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:38:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:38:00,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:00,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 485 transitions, 6184 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:00,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:00,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:00,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:02,303 INFO L124 PetriNetUnfolderBase]: 6280/9690 cut-off events. [2024-06-27 20:38:02,303 INFO L125 PetriNetUnfolderBase]: For 2267939/2267939 co-relation queries the response was YES. [2024-06-27 20:38:02,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97949 conditions, 9690 events. 6280/9690 cut-off events. For 2267939/2267939 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 59708 event pairs, 1608 based on Foata normal form. 1/9690 useless extension candidates. Maximal degree in co-relation 97770. Up to 9593 conditions per place. [2024-06-27 20:38:02,482 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 457 selfloop transitions, 52 changer transitions 0/512 dead transitions. [2024-06-27 20:38:02,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 512 transitions, 7308 flow [2024-06-27 20:38:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:38:02,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:38:02,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-27 20:38:02,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-27 20:38:02,483 INFO L175 Difference]: Start difference. First operand has 364 places, 485 transitions, 6184 flow. Second operand 9 states and 151 transitions. [2024-06-27 20:38:02,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 512 transitions, 7308 flow [2024-06-27 20:38:09,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 512 transitions, 7190 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-27 20:38:09,260 INFO L231 Difference]: Finished difference. Result has 367 places, 488 transitions, 6228 flow [2024-06-27 20:38:09,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6066, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6228, PETRI_PLACES=367, PETRI_TRANSITIONS=488} [2024-06-27 20:38:09,260 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-27 20:38:09,260 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 488 transitions, 6228 flow [2024-06-27 20:38:09,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:09,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:09,260 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 20:38:09,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:38:09,261 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 20:38:09,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash 388933688, now seen corresponding path program 3 times [2024-06-27 20:38:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:09,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688249913] [2024-06-27 20:38:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:09,977 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 20:38:09,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:09,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688249913] [2024-06-27 20:38:09,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688249913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:09,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:09,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:09,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283594470] [2024-06-27 20:38:09,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:09,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:09,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:09,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:09,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:10,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:10,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 488 transitions, 6228 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:10,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:10,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:10,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:12,085 INFO L124 PetriNetUnfolderBase]: 6176/9593 cut-off events. [2024-06-27 20:38:12,086 INFO L125 PetriNetUnfolderBase]: For 2318595/2318597 co-relation queries the response was YES. [2024-06-27 20:38:12,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97618 conditions, 9593 events. 6176/9593 cut-off events. For 2318595/2318597 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 59693 event pairs, 1404 based on Foata normal form. 3/9595 useless extension candidates. Maximal degree in co-relation 97438. Up to 8933 conditions per place. [2024-06-27 20:38:12,240 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 409 selfloop transitions, 91 changer transitions 0/522 dead transitions. [2024-06-27 20:38:12,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 522 transitions, 8078 flow [2024-06-27 20:38:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:12,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:38:12,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:38:12,241 INFO L175 Difference]: Start difference. First operand has 367 places, 488 transitions, 6228 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:38:12,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 522 transitions, 8078 flow [2024-06-27 20:38:18,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 522 transitions, 7944 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:18,388 INFO L231 Difference]: Finished difference. Result has 368 places, 492 transitions, 6343 flow [2024-06-27 20:38:18,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6094, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6343, PETRI_PLACES=368, PETRI_TRANSITIONS=492} [2024-06-27 20:38:18,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 20:38:18,389 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 492 transitions, 6343 flow [2024-06-27 20:38:18,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:18,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:18,389 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 20:38:18,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:38:18,389 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 20:38:18,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 559935020, now seen corresponding path program 1 times [2024-06-27 20:38:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:18,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654341468] [2024-06-27 20:38:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:18,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:19,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654341468] [2024-06-27 20:38:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654341468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:19,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045180598] [2024-06-27 20:38:19,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:19,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:19,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:19,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:19,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:19,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:19,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 492 transitions, 6343 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 20:38:19,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:19,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:19,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:21,295 INFO L124 PetriNetUnfolderBase]: 6342/9777 cut-off events. [2024-06-27 20:38:21,295 INFO L125 PetriNetUnfolderBase]: For 2381375/2381377 co-relation queries the response was YES. [2024-06-27 20:38:21,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100113 conditions, 9777 events. 6342/9777 cut-off events. For 2381375/2381377 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 60210 event pairs, 1512 based on Foata normal form. 3/9779 useless extension candidates. Maximal degree in co-relation 99932. Up to 9444 conditions per place. [2024-06-27 20:38:21,467 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 467 selfloop transitions, 69 changer transitions 0/539 dead transitions. [2024-06-27 20:38:21,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 539 transitions, 8343 flow [2024-06-27 20:38:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:21,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:38:21,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:38:21,468 INFO L175 Difference]: Start difference. First operand has 368 places, 492 transitions, 6343 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:38:21,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 539 transitions, 8343 flow [2024-06-27 20:38:27,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 539 transitions, 8169 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:27,448 INFO L231 Difference]: Finished difference. Result has 372 places, 511 transitions, 6634 flow [2024-06-27 20:38:27,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6169, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6634, PETRI_PLACES=372, PETRI_TRANSITIONS=511} [2024-06-27 20:38:27,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-27 20:38:27,449 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 511 transitions, 6634 flow [2024-06-27 20:38:27,449 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 20:38:27,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:27,449 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 20:38:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:38:27,449 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 20:38:27,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1563728720, now seen corresponding path program 4 times [2024-06-27 20:38:27,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:27,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961798410] [2024-06-27 20:38:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:28,335 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 20:38:28,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961798410] [2024-06-27 20:38:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961798410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:28,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:28,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540586974] [2024-06-27 20:38:28,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:28,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:28,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 511 transitions, 6634 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:28,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:28,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:28,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:30,481 INFO L124 PetriNetUnfolderBase]: 6242/9677 cut-off events. [2024-06-27 20:38:30,481 INFO L125 PetriNetUnfolderBase]: For 2412195/2412197 co-relation queries the response was YES. [2024-06-27 20:38:30,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100706 conditions, 9677 events. 6242/9677 cut-off events. For 2412195/2412197 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 60064 event pairs, 1396 based on Foata normal form. 3/9679 useless extension candidates. Maximal degree in co-relation 100523. Up to 8995 conditions per place. [2024-06-27 20:38:30,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 96 changer transitions 0/540 dead transitions. [2024-06-27 20:38:30,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 540 transitions, 8267 flow [2024-06-27 20:38:30,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:38:30,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 20:38:30,642 INFO L175 Difference]: Start difference. First operand has 372 places, 511 transitions, 6634 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:38:30,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 540 transitions, 8267 flow [2024-06-27 20:38:37,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 540 transitions, 8121 flow, removed 69 selfloop flow, removed 2 redundant places. [2024-06-27 20:38:37,219 INFO L231 Difference]: Finished difference. Result has 378 places, 514 transitions, 6746 flow [2024-06-27 20:38:37,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6746, PETRI_PLACES=378, PETRI_TRANSITIONS=514} [2024-06-27 20:38:37,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 20:38:37,219 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 514 transitions, 6746 flow [2024-06-27 20:38:37,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:37,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:37,220 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 20:38:37,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:38:37,220 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 20:38:37,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash 566363738, now seen corresponding path program 5 times [2024-06-27 20:38:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:37,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381498815] [2024-06-27 20:38:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:37,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:38,220 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 20:38:38,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:38,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381498815] [2024-06-27 20:38:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381498815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173624686] [2024-06-27 20:38:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:38,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:38,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:38,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:38,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 514 transitions, 6746 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:38,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:38,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:38,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:40,334 INFO L124 PetriNetUnfolderBase]: 6279/9728 cut-off events. [2024-06-27 20:38:40,334 INFO L125 PetriNetUnfolderBase]: For 2464998/2465000 co-relation queries the response was YES. [2024-06-27 20:38:40,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101644 conditions, 9728 events. 6279/9728 cut-off events. For 2464998/2465000 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 60308 event pairs, 1375 based on Foata normal form. 1/9728 useless extension candidates. Maximal degree in co-relation 101458. Up to 9026 conditions per place. [2024-06-27 20:38:40,502 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 403 selfloop transitions, 114 changer transitions 0/546 dead transitions. [2024-06-27 20:38:40,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 546 transitions, 8770 flow [2024-06-27 20:38:40,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:38:40,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:38:40,503 INFO L175 Difference]: Start difference. First operand has 378 places, 514 transitions, 6746 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:38:40,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 546 transitions, 8770 flow [2024-06-27 20:38:47,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 546 transitions, 8592 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:47,667 INFO L231 Difference]: Finished difference. Result has 383 places, 524 transitions, 7068 flow [2024-06-27 20:38:47,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6578, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7068, PETRI_PLACES=383, PETRI_TRANSITIONS=524} [2024-06-27 20:38:47,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 20:38:47,668 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 524 transitions, 7068 flow [2024-06-27 20:38:47,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:47,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:47,668 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 20:38:47,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:38:47,668 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 20:38:47,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:47,669 INFO L85 PathProgramCache]: Analyzing trace with hash 566359088, now seen corresponding path program 6 times [2024-06-27 20:38:47,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:47,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519593794] [2024-06-27 20:38:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:47,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:48,433 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 20:38:48,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:48,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519593794] [2024-06-27 20:38:48,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519593794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:48,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:48,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259941352] [2024-06-27 20:38:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:48,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:48,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:38:48,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 524 transitions, 7068 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:48,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:48,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:38:48,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:51,114 INFO L124 PetriNetUnfolderBase]: 6274/9721 cut-off events. [2024-06-27 20:38:51,114 INFO L125 PetriNetUnfolderBase]: For 2501168/2501168 co-relation queries the response was YES. [2024-06-27 20:38:51,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101959 conditions, 9721 events. 6274/9721 cut-off events. For 2501168/2501168 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 60342 event pairs, 1567 based on Foata normal form. 1/9721 useless extension candidates. Maximal degree in co-relation 101770. Up to 9508 conditions per place. [2024-06-27 20:38:51,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 483 selfloop transitions, 29 changer transitions 0/541 dead transitions. [2024-06-27 20:38:51,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 541 transitions, 8134 flow [2024-06-27 20:38:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:38:51,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:38:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:38:51,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:38:51,268 INFO L175 Difference]: Start difference. First operand has 383 places, 524 transitions, 7068 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:38:51,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 541 transitions, 8134 flow [2024-06-27 20:38:57,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 541 transitions, 7998 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:38:57,946 INFO L231 Difference]: Finished difference. Result has 388 places, 524 transitions, 6996 flow [2024-06-27 20:38:57,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6996, PETRI_PLACES=388, PETRI_TRANSITIONS=524} [2024-06-27 20:38:57,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:38:57,947 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 524 transitions, 6996 flow [2024-06-27 20:38:57,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:57,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:57,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:57,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:38:57,947 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 20:38:57,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:57,947 INFO L85 PathProgramCache]: Analyzing trace with hash -313268382, now seen corresponding path program 2 times [2024-06-27 20:38:57,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:57,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484328964] [2024-06-27 20:38:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:57,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:58,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:58,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484328964] [2024-06-27 20:38:58,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484328964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:58,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:58,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:58,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185379973] [2024-06-27 20:38:58,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:58,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:58,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:58,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:58,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:38:58,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 524 transitions, 6996 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 20:38:58,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:58,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:38:58,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:01,387 INFO L124 PetriNetUnfolderBase]: 6412/9874 cut-off events. [2024-06-27 20:39:01,387 INFO L125 PetriNetUnfolderBase]: For 2571897/2571899 co-relation queries the response was YES. [2024-06-27 20:39:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103577 conditions, 9874 events. 6412/9874 cut-off events. For 2571897/2571899 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60707 event pairs, 1514 based on Foata normal form. 1/9874 useless extension candidates. Maximal degree in co-relation 103387. Up to 9521 conditions per place. [2024-06-27 20:39:01,535 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 83 changer transitions 0/557 dead transitions. [2024-06-27 20:39:01,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 557 transitions, 8939 flow [2024-06-27 20:39:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:39:01,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 20:39:01,536 INFO L175 Difference]: Start difference. First operand has 388 places, 524 transitions, 6996 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:39:01,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 557 transitions, 8939 flow [2024-06-27 20:39:09,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 557 transitions, 8871 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:09,362 INFO L231 Difference]: Finished difference. Result has 390 places, 534 transitions, 7346 flow [2024-06-27 20:39:09,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6928, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7346, PETRI_PLACES=390, PETRI_TRANSITIONS=534} [2024-06-27 20:39:09,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-27 20:39:09,363 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 534 transitions, 7346 flow [2024-06-27 20:39:09,363 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 20:39:09,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:09,363 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 20:39:09,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:39:09,363 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 20:39:09,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:09,363 INFO L85 PathProgramCache]: Analyzing trace with hash -313505532, now seen corresponding path program 3 times [2024-06-27 20:39:09,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:09,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903909212] [2024-06-27 20:39:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:09,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903909212] [2024-06-27 20:39:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903909212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:10,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:10,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:10,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310732057] [2024-06-27 20:39:10,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:10,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:10,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:10,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:10,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:10,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 534 transitions, 7346 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 20:39:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:10,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:12,705 INFO L124 PetriNetUnfolderBase]: 6409/9870 cut-off events. [2024-06-27 20:39:12,705 INFO L125 PetriNetUnfolderBase]: For 2609182/2609184 co-relation queries the response was YES. [2024-06-27 20:39:12,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104242 conditions, 9870 events. 6409/9870 cut-off events. For 2609182/2609184 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60683 event pairs, 1514 based on Foata normal form. 1/9870 useless extension candidates. Maximal degree in co-relation 104050. Up to 9519 conditions per place. [2024-06-27 20:39:12,850 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 472 selfloop transitions, 82 changer transitions 0/557 dead transitions. [2024-06-27 20:39:12,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 557 transitions, 9127 flow [2024-06-27 20:39:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:39:12,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 20:39:12,851 INFO L175 Difference]: Start difference. First operand has 390 places, 534 transitions, 7346 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:39:12,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 557 transitions, 9127 flow [2024-06-27 20:39:18,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 557 transitions, 8866 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:18,943 INFO L231 Difference]: Finished difference. Result has 394 places, 535 transitions, 7314 flow [2024-06-27 20:39:18,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7119, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7314, PETRI_PLACES=394, PETRI_TRANSITIONS=535} [2024-06-27 20:39:18,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 20:39:18,944 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 535 transitions, 7314 flow [2024-06-27 20:39:18,944 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 20:39:18,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:18,944 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 20:39:18,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:39:18,944 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 20:39:18,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:18,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1557412036, now seen corresponding path program 4 times [2024-06-27 20:39:18,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:18,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883493834] [2024-06-27 20:39:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:18,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:20,004 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 20:39:20,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883493834] [2024-06-27 20:39:20,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883493834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:20,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:20,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:20,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479179557] [2024-06-27 20:39:20,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:20,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:20,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:20,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 535 transitions, 7314 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:20,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:20,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:20,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:22,676 INFO L124 PetriNetUnfolderBase]: 6419/9883 cut-off events. [2024-06-27 20:39:22,676 INFO L125 PetriNetUnfolderBase]: For 2647595/2647595 co-relation queries the response was YES. [2024-06-27 20:39:22,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104522 conditions, 9883 events. 6419/9883 cut-off events. For 2647595/2647595 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60769 event pairs, 1622 based on Foata normal form. 1/9883 useless extension candidates. Maximal degree in co-relation 104329. Up to 9791 conditions per place. [2024-06-27 20:39:22,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 507 selfloop transitions, 49 changer transitions 0/559 dead transitions. [2024-06-27 20:39:22,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 559 transitions, 8547 flow [2024-06-27 20:39:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:39:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:39:22,944 INFO L175 Difference]: Start difference. First operand has 394 places, 535 transitions, 7314 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:39:22,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 559 transitions, 8547 flow [2024-06-27 20:39:29,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 559 transitions, 8427 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:29,591 INFO L231 Difference]: Finished difference. Result has 399 places, 541 transitions, 7381 flow [2024-06-27 20:39:29,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7381, PETRI_PLACES=399, PETRI_TRANSITIONS=541} [2024-06-27 20:39:29,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-27 20:39:29,592 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 541 transitions, 7381 flow [2024-06-27 20:39:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:29,592 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 20:39:29,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:39:29,592 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 20:39:29,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 566241102, now seen corresponding path program 5 times [2024-06-27 20:39:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622706068] [2024-06-27 20:39:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:30,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:30,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622706068] [2024-06-27 20:39:30,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622706068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:30,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:30,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256576502] [2024-06-27 20:39:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:30,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:30,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 541 transitions, 7381 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:30,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:30,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:30,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:33,307 INFO L124 PetriNetUnfolderBase]: 6432/9901 cut-off events. [2024-06-27 20:39:33,308 INFO L125 PetriNetUnfolderBase]: For 2695710/2695710 co-relation queries the response was YES. [2024-06-27 20:39:33,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104981 conditions, 9901 events. 6432/9901 cut-off events. For 2695710/2695710 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60866 event pairs, 1620 based on Foata normal form. 1/9901 useless extension candidates. Maximal degree in co-relation 104787. Up to 9799 conditions per place. [2024-06-27 20:39:33,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 506 selfloop transitions, 58 changer transitions 0/567 dead transitions. [2024-06-27 20:39:33,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 567 transitions, 8927 flow [2024-06-27 20:39:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:39:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:39:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-27 20:39:33,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-27 20:39:33,455 INFO L175 Difference]: Start difference. First operand has 399 places, 541 transitions, 7381 flow. Second operand 10 states and 159 transitions. [2024-06-27 20:39:33,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 567 transitions, 8927 flow [2024-06-27 20:39:40,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 567 transitions, 8817 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:40,715 INFO L231 Difference]: Finished difference. Result has 405 places, 547 transitions, 7519 flow [2024-06-27 20:39:40,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7519, PETRI_PLACES=405, PETRI_TRANSITIONS=547} [2024-06-27 20:39:40,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 20:39:40,715 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 547 transitions, 7519 flow [2024-06-27 20:39:40,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:40,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:40,715 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 20:39:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:39:40,716 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 20:39:40,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash 566240792, now seen corresponding path program 3 times [2024-06-27 20:39:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:40,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132940069] [2024-06-27 20:39:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:40,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:41,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:41,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132940069] [2024-06-27 20:39:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132940069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:41,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176801585] [2024-06-27 20:39:41,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:41,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:39:41,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 547 transitions, 7519 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:41,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:41,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:39:41,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:44,384 INFO L124 PetriNetUnfolderBase]: 6340/9813 cut-off events. [2024-06-27 20:39:44,384 INFO L125 PetriNetUnfolderBase]: For 2745190/2745190 co-relation queries the response was YES. [2024-06-27 20:39:44,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104733 conditions, 9813 events. 6340/9813 cut-off events. For 2745190/2745190 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60835 event pairs, 1574 based on Foata normal form. 2/9814 useless extension candidates. Maximal degree in co-relation 104538. Up to 9572 conditions per place. [2024-06-27 20:39:44,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 31 changer transitions 0/568 dead transitions. [2024-06-27 20:39:44,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 568 transitions, 8672 flow [2024-06-27 20:39:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-27 20:39:44,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-27 20:39:44,531 INFO L175 Difference]: Start difference. First operand has 405 places, 547 transitions, 7519 flow. Second operand 9 states and 149 transitions. [2024-06-27 20:39:44,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 568 transitions, 8672 flow [2024-06-27 20:39:51,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 568 transitions, 8577 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:51,040 INFO L231 Difference]: Finished difference. Result has 408 places, 549 transitions, 7538 flow [2024-06-27 20:39:51,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7424, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7538, PETRI_PLACES=408, PETRI_TRANSITIONS=549} [2024-06-27 20:39:51,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-27 20:39:51,041 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 549 transitions, 7538 flow [2024-06-27 20:39:51,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:51,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:51,041 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 20:39:51,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:39:51,041 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 20:39:51,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:51,041 INFO L85 PathProgramCache]: Analyzing trace with hash 566597292, now seen corresponding path program 6 times [2024-06-27 20:39:51,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:51,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938353138] [2024-06-27 20:39:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:51,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:51,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938353138] [2024-06-27 20:39:51,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938353138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:51,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:51,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:39:51,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149444155] [2024-06-27 20:39:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:39:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:39:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:39:52,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:39:52,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 549 transitions, 7538 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:52,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:52,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:39:52,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:54,643 INFO L124 PetriNetUnfolderBase]: 6437/9909 cut-off events. [2024-06-27 20:39:54,643 INFO L125 PetriNetUnfolderBase]: For 2768491/2768491 co-relation queries the response was YES. [2024-06-27 20:39:54,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105611 conditions, 9909 events. 6437/9909 cut-off events. For 2768491/2768491 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60942 event pairs, 1620 based on Foata normal form. 1/9909 useless extension candidates. Maximal degree in co-relation 105414. Up to 9817 conditions per place. [2024-06-27 20:39:54,788 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 50 changer transitions 0/567 dead transitions. [2024-06-27 20:39:54,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 567 transitions, 8710 flow [2024-06-27 20:39:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:39:54,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:39:54,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 20:39:54,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 20:39:54,789 INFO L175 Difference]: Start difference. First operand has 408 places, 549 transitions, 7538 flow. Second operand 9 states and 144 transitions. [2024-06-27 20:39:54,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 567 transitions, 8710 flow [2024-06-27 20:40:00,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 567 transitions, 8579 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:00,776 INFO L231 Difference]: Finished difference. Result has 410 places, 549 transitions, 7513 flow [2024-06-27 20:40:00,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7513, PETRI_PLACES=410, PETRI_TRANSITIONS=549} [2024-06-27 20:40:00,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 20:40:00,777 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 549 transitions, 7513 flow [2024-06-27 20:40:00,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:00,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:00,777 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 20:40:00,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:40:00,777 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 20:40:00,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:00,778 INFO L85 PathProgramCache]: Analyzing trace with hash -582975792, now seen corresponding path program 7 times [2024-06-27 20:40:00,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:00,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942163314] [2024-06-27 20:40:00,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:00,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:00,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942163314] [2024-06-27 20:40:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942163314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:01,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:01,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254558503] [2024-06-27 20:40:01,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:01,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:01,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:01,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:01,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:01,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 549 transitions, 7513 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:01,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:01,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:01,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:04,042 INFO L124 PetriNetUnfolderBase]: 6349/9827 cut-off events. [2024-06-27 20:40:04,042 INFO L125 PetriNetUnfolderBase]: For 2827244/2827244 co-relation queries the response was YES. [2024-06-27 20:40:04,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105423 conditions, 9827 events. 6349/9827 cut-off events. For 2827244/2827244 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 61032 event pairs, 1526 based on Foata normal form. 3/9829 useless extension candidates. Maximal degree in co-relation 105225. Up to 9370 conditions per place. [2024-06-27 20:40:04,187 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 486 selfloop transitions, 55 changer transitions 0/577 dead transitions. [2024-06-27 20:40:04,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 577 transitions, 9008 flow [2024-06-27 20:40:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:40:04,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 20:40:04,188 INFO L175 Difference]: Start difference. First operand has 410 places, 549 transitions, 7513 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:40:04,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 577 transitions, 9008 flow [2024-06-27 20:40:10,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 577 transitions, 8894 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:40:10,324 INFO L231 Difference]: Finished difference. Result has 410 places, 553 transitions, 7610 flow [2024-06-27 20:40:10,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7399, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7610, PETRI_PLACES=410, PETRI_TRANSITIONS=553} [2024-06-27 20:40:10,324 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 20:40:10,325 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 553 transitions, 7610 flow [2024-06-27 20:40:10,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:10,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:10,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:10,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:40:10,325 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 20:40:10,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:10,325 INFO L85 PathProgramCache]: Analyzing trace with hash -432206186, now seen corresponding path program 4 times [2024-06-27 20:40:10,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:10,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407083103] [2024-06-27 20:40:10,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:10,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:11,003 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 20:40:11,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:11,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407083103] [2024-06-27 20:40:11,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407083103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:11,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038552085] [2024-06-27 20:40:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:11,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:11,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:11,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:40:11,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 553 transitions, 7610 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 20:40:11,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:11,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:40:11,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:13,911 INFO L124 PetriNetUnfolderBase]: 6443/9918 cut-off events. [2024-06-27 20:40:13,911 INFO L125 PetriNetUnfolderBase]: For 2844102/2844102 co-relation queries the response was YES. [2024-06-27 20:40:14,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106153 conditions, 9918 events. 6443/9918 cut-off events. For 2844102/2844102 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 61000 event pairs, 1595 based on Foata normal form. 3/9920 useless extension candidates. Maximal degree in co-relation 105954. Up to 9702 conditions per place. [2024-06-27 20:40:14,078 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 522 selfloop transitions, 50 changer transitions 0/575 dead transitions. [2024-06-27 20:40:14,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 575 transitions, 9132 flow [2024-06-27 20:40:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:40:14,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:40:14,080 INFO L175 Difference]: Start difference. First operand has 410 places, 553 transitions, 7610 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:40:14,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 575 transitions, 9132 flow [2024-06-27 20:40:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 575 transitions, 9003 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:40:21,190 INFO L231 Difference]: Finished difference. Result has 413 places, 553 transitions, 7588 flow [2024-06-27 20:40:21,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7481, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7588, PETRI_PLACES=413, PETRI_TRANSITIONS=553} [2024-06-27 20:40:21,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 20:40:21,191 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 553 transitions, 7588 flow [2024-06-27 20:40:21,191 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 20:40:21,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:21,191 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 20:40:21,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:40:21,191 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 20:40:21,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash -2065938544, now seen corresponding path program 8 times [2024-06-27 20:40:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:21,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499976344] [2024-06-27 20:40:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:21,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:21,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:21,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499976344] [2024-06-27 20:40:21,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499976344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:21,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:21,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:21,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064903971] [2024-06-27 20:40:21,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:21,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:21,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:21,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:21,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:21,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:21,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 553 transitions, 7588 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:21,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:21,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:21,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:24,625 INFO L124 PetriNetUnfolderBase]: 6331/9803 cut-off events. [2024-06-27 20:40:24,625 INFO L125 PetriNetUnfolderBase]: For 2859441/2859441 co-relation queries the response was YES. [2024-06-27 20:40:24,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105134 conditions, 9803 events. 6331/9803 cut-off events. For 2859441/2859441 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 60922 event pairs, 1540 based on Foata normal form. 3/9805 useless extension candidates. Maximal degree in co-relation 104934. Up to 9354 conditions per place. [2024-06-27 20:40:24,928 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 55 changer transitions 0/574 dead transitions. [2024-06-27 20:40:24,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 574 transitions, 8984 flow [2024-06-27 20:40:24,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:40:24,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-27 20:40:24,929 INFO L175 Difference]: Start difference. First operand has 413 places, 553 transitions, 7588 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:40:24,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 574 transitions, 8984 flow [2024-06-27 20:40:31,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 574 transitions, 8817 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:40:31,442 INFO L231 Difference]: Finished difference. Result has 414 places, 553 transitions, 7538 flow [2024-06-27 20:40:31,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7538, PETRI_PLACES=414, PETRI_TRANSITIONS=553} [2024-06-27 20:40:31,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-27 20:40:31,442 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 553 transitions, 7538 flow [2024-06-27 20:40:31,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:31,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:31,442 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 20:40:31,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:40:31,443 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 20:40:31,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 2048647654, now seen corresponding path program 9 times [2024-06-27 20:40:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878292627] [2024-06-27 20:40:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:32,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:32,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878292627] [2024-06-27 20:40:32,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878292627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:32,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:32,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:32,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260412999] [2024-06-27 20:40:32,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:32,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:32,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:32,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:32,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 20:40:32,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 553 transitions, 7538 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:32,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:32,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 20:40:32,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand