./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix015.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/mix015.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/mix015.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix015.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 20:01:47,796 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:01:47,876 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:01:47,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:01:47,882 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:01:47,910 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:01:47,911 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:01:47,911 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:01:47,912 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:01:47,916 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:01:47,916 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:01:47,917 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:01:47,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:01:47,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:01:47,919 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:01:47,920 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:01:47,920 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:01:47,920 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:01:47,920 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:01:47,921 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:01:47,921 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:01:47,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:01:47,922 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:01:47,922 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:01:47,922 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:01:47,923 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:01:47,923 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:01:47,923 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:01:47,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:01:47,924 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:01:47,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:01:47,926 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:01:47,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:01:47,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:01:47,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:01:47,927 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:01:47,927 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:01:47,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:01:47,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:01:47,928 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:01:47,928 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:01:47,928 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:01:47,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:01:47,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:01:48,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:01:48,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:01:48,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:01:48,178 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:01:48,178 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:01:48,179 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix015.oepc.yml/witness.yml [2024-06-27 20:01:48,380 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:01:48,380 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:01:48,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-27 20:01:49,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:01:49,839 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:01:49,839 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix015.oepc.i [2024-06-27 20:01:49,851 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ef98247a/625635e94e194ad5ae8d5f40f80bc6bd/FLAG2fabed534 [2024-06-27 20:01:49,863 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ef98247a/625635e94e194ad5ae8d5f40f80bc6bd [2024-06-27 20:01:49,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:01:49,865 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:01:49,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:01:49,869 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:01:49,873 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:01:49,874 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:48" (1/2) ... [2024-06-27 20:01:49,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69852936 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:01:49, skipping insertion in model container [2024-06-27 20:01:49,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:48" (1/2) ... [2024-06-27 20:01:49,877 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7c2f8739 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:01:49, skipping insertion in model container [2024-06-27 20:01:49,877 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:01:49" (2/2) ... [2024-06-27 20:01:49,878 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69852936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:49, skipping insertion in model container [2024-06-27 20:01:49,878 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:01:49" (2/2) ... [2024-06-27 20:01:49,879 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:01:49,997 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:01:49,998 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:01:49,998 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:01:49,998 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((! multithreaded || a$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a$mem_tmp == 0 || a$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || (a$w_buff0 == 0 || a$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) [2024-06-27 20:01:49,999 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:01:49,999 INFO L106 edCorrectnessWitness]: ghost_update [L851-L851] multithreaded = 1; [2024-06-27 20:01:50,068 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:01:50,512 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:01:50,523 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:01:50,640 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:01:50,678 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:01:50,678 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50 WrapperNode [2024-06-27 20:01:50,679 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:01:50,679 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:01:50,680 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:01:50,680 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:01:50,686 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,733 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-27 20:01:50,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:01:50,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:01:50,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:01:50,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:01:50,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,750 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,756 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,773 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 20:01:50,774 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,774 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,786 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,789 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,791 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,792 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,797 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:01:50,798 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:01:50,798 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:01:50,798 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:01:50,799 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (1/1) ... [2024-06-27 20:01:50,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:01:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:01:50,837 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 20:01:50,839 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 20:01:50,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:01:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:01:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:01:50,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:01:50,869 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:01:50,869 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:01:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:01:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:01:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:01:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:01:50,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:01:50,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:01:50,872 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 20:01:51,002 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:01:51,005 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:01:51,438 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:01:51,439 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:01:51,645 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:01:51,646 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:01:51,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:01:51 BoogieIcfgContainer [2024-06-27 20:01:51,647 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:01:51,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:01:51,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:01:51,653 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:01:51,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:01:48" (1/4) ... [2024-06-27 20:01:51,654 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7338855 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:01:51, skipping insertion in model container [2024-06-27 20:01:51,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:01:49" (2/4) ... [2024-06-27 20:01:51,655 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7338855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:01:51, skipping insertion in model container [2024-06-27 20:01:51,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:01:50" (3/4) ... [2024-06-27 20:01:51,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7338855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:01:51, skipping insertion in model container [2024-06-27 20:01:51,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:01:51" (4/4) ... [2024-06-27 20:01:51,657 INFO L112 eAbstractionObserver]: Analyzing ICFG mix015.oepc.i [2024-06-27 20:01:51,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:01:51,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:01:51,676 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:01:51,780 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:01:51,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:01:51,847 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-27 20:01:51,847 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:01:51,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:01:51,849 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-27 20:01:51,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-27 20:01:51,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:01:51,867 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;@1fa2ef52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:01:51,868 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:01:51,872 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:01:51,872 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:01:51,872 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:01:51,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:51,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:01:51,873 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 20:01:51,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash 381748823, now seen corresponding path program 1 times [2024-06-27 20:01:51,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:51,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886312100] [2024-06-27 20:01:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:52,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:53,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:53,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886312100] [2024-06-27 20:01:53,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886312100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:53,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:53,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:01:53,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628180263] [2024-06-27 20:01:53,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:01:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:53,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:01:53,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:01:53,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 20:01:53,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:53,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:53,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 20:01:53,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:53,715 INFO L124 PetriNetUnfolderBase]: 1363/2133 cut-off events. [2024-06-27 20:01:53,715 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 20:01:53,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4257 conditions, 2133 events. 1363/2133 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10835 event pairs, 964 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 4245. Up to 2037 conditions per place. [2024-06-27 20:01:53,735 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-27 20:01:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-27 20:01:53,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:01:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:01:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-27 20:01:53,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-27 20:01:53,749 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-27 20:01:53,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-27 20:01:53,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:01:53,756 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-27 20:01:53,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-27 20:01:53,762 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-27 20:01:53,762 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-27 20:01:53,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:53,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:53,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:53,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:01:53,763 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 20:01:53,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:53,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1788670246, now seen corresponding path program 1 times [2024-06-27 20:01:53,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:53,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316561669] [2024-06-27 20:01:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:54,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:54,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316561669] [2024-06-27 20:01:54,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316561669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:54,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:01:54,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68553119] [2024-06-27 20:01:54,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:01:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:01:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:01:54,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-27 20:01:54,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:54,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:54,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-27 20:01:54,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:55,238 INFO L124 PetriNetUnfolderBase]: 1357/2124 cut-off events. [2024-06-27 20:01:55,239 INFO L125 PetriNetUnfolderBase]: For 402/402 co-relation queries the response was YES. [2024-06-27 20:01:55,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4791 conditions, 2124 events. 1357/2124 cut-off events. For 402/402 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10768 event pairs, 840 based on Foata normal form. 3/2112 useless extension candidates. Maximal degree in co-relation 4779. Up to 2013 conditions per place. [2024-06-27 20:01:55,252 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 39 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-27 20:01:55,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 242 flow [2024-06-27 20:01:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:01:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:01:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 20:01:55,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2024-06-27 20:01:55,254 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 105 transitions. [2024-06-27 20:01:55,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 242 flow [2024-06-27 20:01:55,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:01:55,258 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-27 20:01:55,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-27 20:01:55,259 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-27 20:01:55,259 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-27 20:01:55,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:55,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:55,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:55,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:01:55,260 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 20:01:55,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:55,261 INFO L85 PathProgramCache]: Analyzing trace with hash -385795884, now seen corresponding path program 1 times [2024-06-27 20:01:55,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:55,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564877739] [2024-06-27 20:01:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:55,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:56,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:56,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564877739] [2024-06-27 20:01:56,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564877739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:56,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:56,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:01:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485163457] [2024-06-27 20:01:56,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:56,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:01:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:01:56,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:01:56,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 20:01:56,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:56,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:56,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 20:01:56,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:57,022 INFO L124 PetriNetUnfolderBase]: 1598/2489 cut-off events. [2024-06-27 20:01:57,022 INFO L125 PetriNetUnfolderBase]: For 1293/1293 co-relation queries the response was YES. [2024-06-27 20:01:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6201 conditions, 2489 events. 1598/2489 cut-off events. For 1293/1293 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12532 event pairs, 915 based on Foata normal form. 3/2478 useless extension candidates. Maximal degree in co-relation 6187. Up to 2350 conditions per place. [2024-06-27 20:01:57,035 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 47 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-27 20:01:57,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 322 flow [2024-06-27 20:01:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:01:57,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:01:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-27 20:01:57,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-27 20:01:57,045 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 125 transitions. [2024-06-27 20:01:57,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 322 flow [2024-06-27 20:01:57,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 64 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:01:57,050 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-27 20:01:57,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-27 20:01:57,051 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-27 20:01:57,052 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-27 20:01:57,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:57,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:57,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:01:57,053 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 20:01:57,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 703585813, now seen corresponding path program 1 times [2024-06-27 20:01:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:57,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481245118] [2024-06-27 20:01:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:58,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:58,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481245118] [2024-06-27 20:01:58,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481245118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:58,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:58,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:01:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748725433] [2024-06-27 20:01:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:01:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:01:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:01:58,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-27 20:01:58,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 20:01:58,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:58,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-27 20:01:58,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:59,061 INFO L124 PetriNetUnfolderBase]: 1592/2479 cut-off events. [2024-06-27 20:01:59,062 INFO L125 PetriNetUnfolderBase]: For 2422/2422 co-relation queries the response was YES. [2024-06-27 20:01:59,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6771 conditions, 2479 events. 1592/2479 cut-off events. For 2422/2422 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12511 event pairs, 791 based on Foata normal form. 3/2474 useless extension candidates. Maximal degree in co-relation 6756. Up to 2326 conditions per place. [2024-06-27 20:01:59,077 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 54 selfloop transitions, 13 changer transitions 0/74 dead transitions. [2024-06-27 20:01:59,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 400 flow [2024-06-27 20:01:59,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:01:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:01:59,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 20:01:59,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736434108527132 [2024-06-27 20:01:59,079 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 148 transitions. [2024-06-27 20:01:59,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 400 flow [2024-06-27 20:01:59,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 376 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:01:59,082 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 212 flow [2024-06-27 20:01:59,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2024-06-27 20:01:59,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-27 20:01:59,084 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 212 flow [2024-06-27 20:01:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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 20:01:59,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:59,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:01:59,085 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 20:01:59,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash -472018907, now seen corresponding path program 1 times [2024-06-27 20:01:59,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:59,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941974927] [2024-06-27 20:01:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:59,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:59,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:59,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941974927] [2024-06-27 20:01:59,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941974927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:01:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410036635] [2024-06-27 20:01:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:01:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:59,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:01:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:01:59,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:01:59,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:59,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:59,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:01:59,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:00,487 INFO L124 PetriNetUnfolderBase]: 1740/2794 cut-off events. [2024-06-27 20:02:00,487 INFO L125 PetriNetUnfolderBase]: For 4262/4262 co-relation queries the response was YES. [2024-06-27 20:02:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8073 conditions, 2794 events. 1740/2794 cut-off events. For 4262/4262 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14479 event pairs, 933 based on Foata normal form. 4/2798 useless extension candidates. Maximal degree in co-relation 8056. Up to 2573 conditions per place. [2024-06-27 20:02:00,503 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 20:02:00,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 366 flow [2024-06-27 20:02:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2024-06-27 20:02:00,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 20:02:00,505 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 212 flow. Second operand 5 states and 103 transitions. [2024-06-27 20:02:00,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 366 flow [2024-06-27 20:02:00,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 61 transitions, 332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:00,510 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 224 flow [2024-06-27 20:02:00,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, 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 20:02:00,513 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-06-27 20:02:00,513 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 224 flow [2024-06-27 20:02:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:00,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:00,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:00,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:02:00,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:00,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:00,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1836145652, now seen corresponding path program 1 times [2024-06-27 20:02:00,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94482439] [2024-06-27 20:02:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:00,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:02,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94482439] [2024-06-27 20:02:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94482439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:02,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:02,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838621250] [2024-06-27 20:02:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:02,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:02,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:02:02,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 224 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:02,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:02,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:02:02,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:03,525 INFO L124 PetriNetUnfolderBase]: 1817/2858 cut-off events. [2024-06-27 20:02:03,525 INFO L125 PetriNetUnfolderBase]: For 5804/5804 co-relation queries the response was YES. [2024-06-27 20:02:03,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8875 conditions, 2858 events. 1817/2858 cut-off events. For 5804/5804 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14491 event pairs, 724 based on Foata normal form. 3/2861 useless extension candidates. Maximal degree in co-relation 8857. Up to 2625 conditions per place. [2024-06-27 20:02:03,552 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 72 selfloop transitions, 19 changer transitions 0/97 dead transitions. [2024-06-27 20:02:03,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 97 transitions, 548 flow [2024-06-27 20:02:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 20:02:03,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436046511627907 [2024-06-27 20:02:03,554 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 224 flow. Second operand 8 states and 187 transitions. [2024-06-27 20:02:03,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 97 transitions, 548 flow [2024-06-27 20:02:03,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 97 transitions, 526 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:03,558 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 296 flow [2024-06-27 20:02:03,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-27 20:02:03,561 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 16 predicate places. [2024-06-27 20:02:03,561 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 296 flow [2024-06-27 20:02:03,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:03,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:03,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:03,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:02:03,562 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 20:02:03,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:03,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1752530566, now seen corresponding path program 1 times [2024-06-27 20:02:03,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:03,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090316708] [2024-06-27 20:02:03,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:04,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090316708] [2024-06-27 20:02:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090316708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:04,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:04,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925126027] [2024-06-27 20:02:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:04,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:04,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:04,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:02:04,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 20:02:04,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:04,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:02:04,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:05,145 INFO L124 PetriNetUnfolderBase]: 1772/2823 cut-off events. [2024-06-27 20:02:05,145 INFO L125 PetriNetUnfolderBase]: For 8227/8227 co-relation queries the response was YES. [2024-06-27 20:02:05,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9555 conditions, 2823 events. 1772/2823 cut-off events. For 8227/8227 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14556 event pairs, 679 based on Foata normal form. 4/2826 useless extension candidates. Maximal degree in co-relation 9535. Up to 2571 conditions per place. [2024-06-27 20:02:05,166 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 16 changer transitions 0/86 dead transitions. [2024-06-27 20:02:05,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 86 transitions, 586 flow [2024-06-27 20:02:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:05,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 20:02:05,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:02:05,168 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 296 flow. Second operand 6 states and 129 transitions. [2024-06-27 20:02:05,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 86 transitions, 586 flow [2024-06-27 20:02:05,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 536 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:05,174 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 358 flow [2024-06-27 20:02:05,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=358, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-27 20:02:05,175 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-27 20:02:05,175 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 358 flow [2024-06-27 20:02:05,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 20:02:05,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:05,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:02:05,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:05,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1546372782, now seen corresponding path program 1 times [2024-06-27 20:02:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:05,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705572571] [2024-06-27 20:02:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:05,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:07,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705572571] [2024-06-27 20:02:07,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705572571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:07,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:07,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:07,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378692453] [2024-06-27 20:02:07,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:07,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:07,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:07,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:07,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-27 20:02:07,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 358 flow. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:07,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:07,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-27 20:02:07,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:08,352 INFO L124 PetriNetUnfolderBase]: 1846/2876 cut-off events. [2024-06-27 20:02:08,352 INFO L125 PetriNetUnfolderBase]: For 10861/10861 co-relation queries the response was YES. [2024-06-27 20:02:08,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 2876 events. 1846/2876 cut-off events. For 10861/10861 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14486 event pairs, 554 based on Foata normal form. 6/2882 useless extension candidates. Maximal degree in co-relation 10524. Up to 2635 conditions per place. [2024-06-27 20:02:08,368 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 85 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-06-27 20:02:08,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 112 transitions, 706 flow [2024-06-27 20:02:08,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-27 20:02:08,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297157622739018 [2024-06-27 20:02:08,373 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 358 flow. Second operand 9 states and 205 transitions. [2024-06-27 20:02:08,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 112 transitions, 706 flow [2024-06-27 20:02:08,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 688 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-27 20:02:08,381 INFO L231 Difference]: Finished difference. Result has 69 places, 65 transitions, 409 flow [2024-06-27 20:02:08,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=409, PETRI_PLACES=69, PETRI_TRANSITIONS=65} [2024-06-27 20:02:08,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 25 predicate places. [2024-06-27 20:02:08,383 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 65 transitions, 409 flow [2024-06-27 20:02:08,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:08,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:08,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:08,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:02:08,384 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 20:02:08,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1364107544, now seen corresponding path program 2 times [2024-06-27 20:02:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020512947] [2024-06-27 20:02:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:09,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:09,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020512947] [2024-06-27 20:02:09,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020512947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:09,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:09,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:09,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027647501] [2024-06-27 20:02:09,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:09,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:09,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:09,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:09,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:09,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-27 20:02:09,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 65 transitions, 409 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 20:02:09,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:09,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-27 20:02:09,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:09,772 INFO L124 PetriNetUnfolderBase]: 1753/2779 cut-off events. [2024-06-27 20:02:09,772 INFO L125 PetriNetUnfolderBase]: For 13536/13536 co-relation queries the response was YES. [2024-06-27 20:02:09,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10728 conditions, 2779 events. 1753/2779 cut-off events. For 13536/13536 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14354 event pairs, 655 based on Foata normal form. 4/2783 useless extension candidates. Maximal degree in co-relation 10703. Up to 2581 conditions per place. [2024-06-27 20:02:09,790 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 63 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-27 20:02:09,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 81 transitions, 599 flow [2024-06-27 20:02:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:09,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:02:09,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:02:09,792 INFO L175 Difference]: Start difference. First operand has 69 places, 65 transitions, 409 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:02:09,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 81 transitions, 599 flow [2024-06-27 20:02:09,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 524 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:09,807 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 364 flow [2024-06-27 20:02:09,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-27 20:02:09,808 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-27 20:02:09,809 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 364 flow [2024-06-27 20:02:09,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 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 20:02:09,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:09,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:02:09,809 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 20:02:09,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1505949030, now seen corresponding path program 1 times [2024-06-27 20:02:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924136023] [2024-06-27 20:02:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:09,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:10,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:10,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924136023] [2024-06-27 20:02:10,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924136023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:10,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:10,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528781075] [2024-06-27 20:02:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:10,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:10,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:10,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:10,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:10,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:10,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:10,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:11,526 INFO L124 PetriNetUnfolderBase]: 1874/2906 cut-off events. [2024-06-27 20:02:11,526 INFO L125 PetriNetUnfolderBase]: For 16103/16103 co-relation queries the response was YES. [2024-06-27 20:02:11,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11360 conditions, 2906 events. 1874/2906 cut-off events. For 16103/16103 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14603 event pairs, 619 based on Foata normal form. 4/2909 useless extension candidates. Maximal degree in co-relation 11333. Up to 2649 conditions per place. [2024-06-27 20:02:11,544 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2024-06-27 20:02:11,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 101 transitions, 728 flow [2024-06-27 20:02:11,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-27 20:02:11,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48172757475083056 [2024-06-27 20:02:11,546 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 364 flow. Second operand 7 states and 145 transitions. [2024-06-27 20:02:11,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 101 transitions, 728 flow [2024-06-27 20:02:11,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 696 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:11,556 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 450 flow [2024-06-27 20:02:11,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=450, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-27 20:02:11,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-27 20:02:11,557 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 450 flow [2024-06-27 20:02:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:11,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:11,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:11,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:02:11,558 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 20:02:11,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:11,558 INFO L85 PathProgramCache]: Analyzing trace with hash -427357762, now seen corresponding path program 2 times [2024-06-27 20:02:11,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:11,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540297056] [2024-06-27 20:02:11,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:11,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:12,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:12,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540297056] [2024-06-27 20:02:12,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540297056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:12,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:12,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:12,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108235294] [2024-06-27 20:02:12,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:12,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:12,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:12,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:12,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:12,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:12,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 450 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:12,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:12,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:12,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:13,233 INFO L124 PetriNetUnfolderBase]: 1896/2938 cut-off events. [2024-06-27 20:02:13,234 INFO L125 PetriNetUnfolderBase]: For 19674/19674 co-relation queries the response was YES. [2024-06-27 20:02:13,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12200 conditions, 2938 events. 1896/2938 cut-off events. For 19674/19674 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14780 event pairs, 626 based on Foata normal form. 4/2941 useless extension candidates. Maximal degree in co-relation 12173. Up to 2668 conditions per place. [2024-06-27 20:02:13,251 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-27 20:02:13,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 788 flow [2024-06-27 20:02:13,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:13,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 20:02:13,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-27 20:02:13,253 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 450 flow. Second operand 7 states and 143 transitions. [2024-06-27 20:02:13,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 788 flow [2024-06-27 20:02:13,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 101 transitions, 740 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:13,268 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 496 flow [2024-06-27 20:02:13,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-27 20:02:13,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-27 20:02:13,269 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 496 flow [2024-06-27 20:02:13,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:13,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:13,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:13,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:02:13,270 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 20:02:13,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:13,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1964504924, now seen corresponding path program 3 times [2024-06-27 20:02:13,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:13,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110029521] [2024-06-27 20:02:13,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:13,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110029521] [2024-06-27 20:02:14,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110029521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:14,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:14,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:14,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378631832] [2024-06-27 20:02:14,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:14,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:14,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:14,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:14,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:14,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 496 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:14,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:14,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:14,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:14,844 INFO L124 PetriNetUnfolderBase]: 1886/2927 cut-off events. [2024-06-27 20:02:14,845 INFO L125 PetriNetUnfolderBase]: For 22118/22118 co-relation queries the response was YES. [2024-06-27 20:02:14,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12424 conditions, 2927 events. 1886/2927 cut-off events. For 22118/22118 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14709 event pairs, 650 based on Foata normal form. 4/2931 useless extension candidates. Maximal degree in co-relation 12395. Up to 2749 conditions per place. [2024-06-27 20:02:14,864 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 76 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 20:02:14,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 732 flow [2024-06-27 20:02:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:02:14,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:02:14,866 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 496 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:02:14,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 732 flow [2024-06-27 20:02:14,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 95 transitions, 664 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:14,891 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 464 flow [2024-06-27 20:02:14,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2024-06-27 20:02:14,892 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-06-27 20:02:14,892 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 464 flow [2024-06-27 20:02:14,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:14,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:14,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:14,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:02:14,893 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 20:02:14,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 662648144, now seen corresponding path program 1 times [2024-06-27 20:02:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:14,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422255044] [2024-06-27 20:02:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:16,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:16,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422255044] [2024-06-27 20:02:16,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422255044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:16,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:16,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:02:16,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737256862] [2024-06-27 20:02:16,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:16,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:02:16,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:02:16,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:02:16,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:16,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 464 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:16,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:16,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:16,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:16,944 INFO L124 PetriNetUnfolderBase]: 2196/3376 cut-off events. [2024-06-27 20:02:16,944 INFO L125 PetriNetUnfolderBase]: For 29093/29093 co-relation queries the response was YES. [2024-06-27 20:02:16,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14238 conditions, 3376 events. 2196/3376 cut-off events. For 29093/29093 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 16719 event pairs, 811 based on Foata normal form. 4/3380 useless extension candidates. Maximal degree in co-relation 14208. Up to 3176 conditions per place. [2024-06-27 20:02:16,964 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 75 selfloop transitions, 15 changer transitions 0/99 dead transitions. [2024-06-27 20:02:16,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 99 transitions, 743 flow [2024-06-27 20:02:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:16,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:02:16,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-27 20:02:16,966 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 464 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:02:16,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 99 transitions, 743 flow [2024-06-27 20:02:16,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 686 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:16,984 INFO L231 Difference]: Finished difference. Result has 78 places, 79 transitions, 503 flow [2024-06-27 20:02:16,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=503, PETRI_PLACES=78, PETRI_TRANSITIONS=79} [2024-06-27 20:02:16,985 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-06-27 20:02:16,985 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 79 transitions, 503 flow [2024-06-27 20:02:16,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:16,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:16,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:16,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:02:16,986 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:16,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1122138237, now seen corresponding path program 1 times [2024-06-27 20:02:16,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:16,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784993520] [2024-06-27 20:02:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:16,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:17,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:17,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784993520] [2024-06-27 20:02:17,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784993520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:17,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:17,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:02:17,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666835851] [2024-06-27 20:02:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:17,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:02:17,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:02:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:02:17,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:17,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 503 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 20:02:17,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:17,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:17,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:18,153 INFO L124 PetriNetUnfolderBase]: 2382/3631 cut-off events. [2024-06-27 20:02:18,153 INFO L125 PetriNetUnfolderBase]: For 37862/37862 co-relation queries the response was YES. [2024-06-27 20:02:18,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16300 conditions, 3631 events. 2382/3631 cut-off events. For 37862/37862 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 17784 event pairs, 981 based on Foata normal form. 1/3632 useless extension candidates. Maximal degree in co-relation 16268. Up to 3524 conditions per place. [2024-06-27 20:02:18,176 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 72 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-06-27 20:02:18,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 707 flow [2024-06-27 20:02:18,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:02:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:02:18,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-06-27 20:02:18,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-27 20:02:18,178 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 503 flow. Second operand 5 states and 93 transitions. [2024-06-27 20:02:18,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 707 flow [2024-06-27 20:02:18,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 90 transitions, 660 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:18,200 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 508 flow [2024-06-27 20:02:18,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=508, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-27 20:02:18,201 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-27 20:02:18,201 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 508 flow [2024-06-27 20:02:18,201 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 20:02:18,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:18,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:18,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:02:18,202 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 20:02:18,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -560368807, now seen corresponding path program 1 times [2024-06-27 20:02:18,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:18,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887790426] [2024-06-27 20:02:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:18,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:19,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:19,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887790426] [2024-06-27 20:02:19,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887790426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:19,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:19,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518077285] [2024-06-27 20:02:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:19,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:19,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 508 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:19,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:19,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:19,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:20,243 INFO L124 PetriNetUnfolderBase]: 2299/3510 cut-off events. [2024-06-27 20:02:20,243 INFO L125 PetriNetUnfolderBase]: For 41415/41421 co-relation queries the response was YES. [2024-06-27 20:02:20,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16390 conditions, 3510 events. 2299/3510 cut-off events. For 41415/41421 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 17860 event pairs, 769 based on Foata normal form. 4/3492 useless extension candidates. Maximal degree in co-relation 16357. Up to 3117 conditions per place. [2024-06-27 20:02:20,262 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 82 selfloop transitions, 37 changer transitions 0/126 dead transitions. [2024-06-27 20:02:20,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 970 flow [2024-06-27 20:02:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:20,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:02:20,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48546511627906974 [2024-06-27 20:02:20,264 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 508 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:02:20,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 970 flow [2024-06-27 20:02:20,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 126 transitions, 940 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:02:20,289 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 634 flow [2024-06-27 20:02:20,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-27 20:02:20,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-27 20:02:20,290 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 634 flow [2024-06-27 20:02:20,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:20,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:20,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:20,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:02:20,291 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:20,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:20,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1373473251, now seen corresponding path program 2 times [2024-06-27 20:02:20,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:20,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128850412] [2024-06-27 20:02:20,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:20,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:21,489 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 20:02:21,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128850412] [2024-06-27 20:02:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128850412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:21,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736652921] [2024-06-27 20:02:21,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:21,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:21,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:21,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 634 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:21,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:21,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:21,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:22,124 INFO L124 PetriNetUnfolderBase]: 2321/3542 cut-off events. [2024-06-27 20:02:22,124 INFO L125 PetriNetUnfolderBase]: For 47686/47692 co-relation queries the response was YES. [2024-06-27 20:02:22,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17434 conditions, 3542 events. 2321/3542 cut-off events. For 47686/47692 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18020 event pairs, 769 based on Foata normal form. 4/3524 useless extension candidates. Maximal degree in co-relation 17400. Up to 3136 conditions per place. [2024-06-27 20:02:22,145 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 81 selfloop transitions, 38 changer transitions 0/126 dead transitions. [2024-06-27 20:02:22,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1064 flow [2024-06-27 20:02:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:22,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 20:02:22,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796511627906977 [2024-06-27 20:02:22,149 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 634 flow. Second operand 8 states and 165 transitions. [2024-06-27 20:02:22,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1064 flow [2024-06-27 20:02:22,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 983 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:22,178 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 677 flow [2024-06-27 20:02:22,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=677, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2024-06-27 20:02:22,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-06-27 20:02:22,179 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 677 flow [2024-06-27 20:02:22,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:22,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:22,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:02:22,180 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 20:02:22,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:22,180 INFO L85 PathProgramCache]: Analyzing trace with hash -554654887, now seen corresponding path program 3 times [2024-06-27 20:02:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:22,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415735034] [2024-06-27 20:02:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:22,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:23,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:23,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415735034] [2024-06-27 20:02:23,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415735034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:23,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:23,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:23,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256016618] [2024-06-27 20:02:23,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:23,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:23,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:23,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:23,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 677 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:23,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:23,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:23,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:24,055 INFO L124 PetriNetUnfolderBase]: 2343/3574 cut-off events. [2024-06-27 20:02:24,055 INFO L125 PetriNetUnfolderBase]: For 52833/52839 co-relation queries the response was YES. [2024-06-27 20:02:24,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17882 conditions, 3574 events. 2343/3574 cut-off events. For 52833/52839 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18194 event pairs, 786 based on Foata normal form. 4/3556 useless extension candidates. Maximal degree in co-relation 17846. Up to 3155 conditions per place. [2024-06-27 20:02:24,074 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 79 selfloop transitions, 40 changer transitions 0/126 dead transitions. [2024-06-27 20:02:24,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1101 flow [2024-06-27 20:02:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:02:24,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738372093023256 [2024-06-27 20:02:24,076 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 677 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:02:24,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1101 flow [2024-06-27 20:02:24,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1021 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:24,104 INFO L231 Difference]: Finished difference. Result has 91 places, 94 transitions, 723 flow [2024-06-27 20:02:24,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=723, PETRI_PLACES=91, PETRI_TRANSITIONS=94} [2024-06-27 20:02:24,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 20:02:24,104 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 94 transitions, 723 flow [2024-06-27 20:02:24,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:24,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:24,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:24,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:02:24,105 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 20:02:24,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:24,106 INFO L85 PathProgramCache]: Analyzing trace with hash 770111749, now seen corresponding path program 4 times [2024-06-27 20:02:24,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:24,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029726038] [2024-06-27 20:02:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:24,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:25,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:25,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029726038] [2024-06-27 20:02:25,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029726038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:25,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:25,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222604193] [2024-06-27 20:02:25,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:25,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:25,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 94 transitions, 723 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:25,907 INFO L124 PetriNetUnfolderBase]: 2356/3600 cut-off events. [2024-06-27 20:02:25,907 INFO L125 PetriNetUnfolderBase]: For 58195/58199 co-relation queries the response was YES. [2024-06-27 20:02:25,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18267 conditions, 3600 events. 2356/3600 cut-off events. For 58195/58199 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18258 event pairs, 782 based on Foata normal form. 6/3585 useless extension candidates. Maximal degree in co-relation 18230. Up to 3326 conditions per place. [2024-06-27 20:02:25,928 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 94 selfloop transitions, 19 changer transitions 0/120 dead transitions. [2024-06-27 20:02:25,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 120 transitions, 1019 flow [2024-06-27 20:02:25,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:02:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:02:25,930 INFO L175 Difference]: Start difference. First operand has 91 places, 94 transitions, 723 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:02:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 120 transitions, 1019 flow [2024-06-27 20:02:25,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 924 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:25,964 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 674 flow [2024-06-27 20:02:25,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-06-27 20:02:25,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 50 predicate places. [2024-06-27 20:02:25,965 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 674 flow [2024-06-27 20:02:25,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:25,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:25,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:25,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:02:25,966 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 20:02:25,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:25,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1622471911, now seen corresponding path program 1 times [2024-06-27 20:02:25,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:25,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866067506] [2024-06-27 20:02:25,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:25,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:27,046 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 20:02:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:27,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866067506] [2024-06-27 20:02:27,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866067506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:27,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:27,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:27,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349476025] [2024-06-27 20:02:27,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:27,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:27,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:27,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:27,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:27,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:27,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 674 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:27,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:27,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:27,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:27,802 INFO L124 PetriNetUnfolderBase]: 2386/3649 cut-off events. [2024-06-27 20:02:27,802 INFO L125 PetriNetUnfolderBase]: For 65261/65273 co-relation queries the response was YES. [2024-06-27 20:02:27,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18848 conditions, 3649 events. 2386/3649 cut-off events. For 65261/65273 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18220 event pairs, 868 based on Foata normal form. 4/3618 useless extension candidates. Maximal degree in co-relation 18810. Up to 3385 conditions per place. [2024-06-27 20:02:27,822 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 91 selfloop transitions, 19 changer transitions 0/120 dead transitions. [2024-06-27 20:02:27,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 120 transitions, 1016 flow [2024-06-27 20:02:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:02:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:02:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:02:27,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:02:27,823 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 674 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:02:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 120 transitions, 1016 flow [2024-06-27 20:02:27,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 120 transitions, 914 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:02:27,865 INFO L231 Difference]: Finished difference. Result has 91 places, 100 transitions, 704 flow [2024-06-27 20:02:27,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=704, PETRI_PLACES=91, PETRI_TRANSITIONS=100} [2024-06-27 20:02:27,865 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-27 20:02:27,865 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 100 transitions, 704 flow [2024-06-27 20:02:27,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:27,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:27,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:27,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:02:27,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:27,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:27,867 INFO L85 PathProgramCache]: Analyzing trace with hash -412246217, now seen corresponding path program 1 times [2024-06-27 20:02:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:27,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090423855] [2024-06-27 20:02:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:28,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:28,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090423855] [2024-06-27 20:02:28,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090423855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:28,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:28,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:28,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455190266] [2024-06-27 20:02:28,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:28,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:28,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:28,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:28,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 100 transitions, 704 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 20:02:28,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:28,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:28,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:29,297 INFO L124 PetriNetUnfolderBase]: 2433/3713 cut-off events. [2024-06-27 20:02:29,297 INFO L125 PetriNetUnfolderBase]: For 71349/71361 co-relation queries the response was YES. [2024-06-27 20:02:29,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19604 conditions, 3713 events. 2433/3713 cut-off events. For 71349/71361 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18200 event pairs, 945 based on Foata normal form. 5/3712 useless extension candidates. Maximal degree in co-relation 19566. Up to 3558 conditions per place. [2024-06-27 20:02:29,316 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 89 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-06-27 20:02:29,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 114 transitions, 958 flow [2024-06-27 20:02:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:29,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 109 transitions. [2024-06-27 20:02:29,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42248062015503873 [2024-06-27 20:02:29,317 INFO L175 Difference]: Start difference. First operand has 91 places, 100 transitions, 704 flow. Second operand 6 states and 109 transitions. [2024-06-27 20:02:29,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 114 transitions, 958 flow [2024-06-27 20:02:29,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 114 transitions, 908 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:29,352 INFO L231 Difference]: Finished difference. Result has 92 places, 103 transitions, 716 flow [2024-06-27 20:02:29,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=92, PETRI_TRANSITIONS=103} [2024-06-27 20:02:29,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 48 predicate places. [2024-06-27 20:02:29,353 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 103 transitions, 716 flow [2024-06-27 20:02:29,353 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 20:02:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:29,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:02:29,354 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 20:02:29,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash -191682523, now seen corresponding path program 1 times [2024-06-27 20:02:29,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:29,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597262876] [2024-06-27 20:02:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:30,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:30,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:30,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597262876] [2024-06-27 20:02:30,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597262876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:30,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:30,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551665874] [2024-06-27 20:02:30,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:30,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:30,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:30,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:30,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:31,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:31,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 103 transitions, 716 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:31,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:31,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:31,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:31,756 INFO L124 PetriNetUnfolderBase]: 2419/3703 cut-off events. [2024-06-27 20:02:31,756 INFO L125 PetriNetUnfolderBase]: For 75896/75898 co-relation queries the response was YES. [2024-06-27 20:02:31,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20094 conditions, 3703 events. 2419/3703 cut-off events. For 75896/75898 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18946 event pairs, 756 based on Foata normal form. 4/3697 useless extension candidates. Maximal degree in co-relation 20055. Up to 3439 conditions per place. [2024-06-27 20:02:31,779 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 119 selfloop transitions, 20 changer transitions 0/146 dead transitions. [2024-06-27 20:02:31,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1140 flow [2024-06-27 20:02:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 20:02:31,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4599483204134367 [2024-06-27 20:02:31,781 INFO L175 Difference]: Start difference. First operand has 92 places, 103 transitions, 716 flow. Second operand 9 states and 178 transitions. [2024-06-27 20:02:31,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1140 flow [2024-06-27 20:02:31,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 146 transitions, 1100 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:02:31,815 INFO L231 Difference]: Finished difference. Result has 97 places, 106 transitions, 772 flow [2024-06-27 20:02:31,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=772, PETRI_PLACES=97, PETRI_TRANSITIONS=106} [2024-06-27 20:02:31,815 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-27 20:02:31,815 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 106 transitions, 772 flow [2024-06-27 20:02:31,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:31,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:31,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:31,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:02:31,816 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 20:02:31,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash -191562553, now seen corresponding path program 2 times [2024-06-27 20:02:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:31,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323439802] [2024-06-27 20:02:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:31,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:33,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:33,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323439802] [2024-06-27 20:02:33,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323439802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:33,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:33,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:33,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121130470] [2024-06-27 20:02:33,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:33,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:33,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:33,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:33,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:33,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 106 transitions, 772 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:33,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:33,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:33,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:33,763 INFO L124 PetriNetUnfolderBase]: 2464/3764 cut-off events. [2024-06-27 20:02:33,763 INFO L125 PetriNetUnfolderBase]: For 84213/84213 co-relation queries the response was YES. [2024-06-27 20:02:33,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21194 conditions, 3764 events. 2464/3764 cut-off events. For 84213/84213 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19249 event pairs, 647 based on Foata normal form. 4/3759 useless extension candidates. Maximal degree in co-relation 21154. Up to 3164 conditions per place. [2024-06-27 20:02:33,784 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 94 selfloop transitions, 54 changer transitions 0/155 dead transitions. [2024-06-27 20:02:33,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 155 transitions, 1360 flow [2024-06-27 20:02:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:33,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-27 20:02:33,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48320413436692505 [2024-06-27 20:02:33,785 INFO L175 Difference]: Start difference. First operand has 97 places, 106 transitions, 772 flow. Second operand 9 states and 187 transitions. [2024-06-27 20:02:33,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 155 transitions, 1360 flow [2024-06-27 20:02:33,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 1288 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:33,825 INFO L231 Difference]: Finished difference. Result has 99 places, 112 transitions, 918 flow [2024-06-27 20:02:33,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=918, PETRI_PLACES=99, PETRI_TRANSITIONS=112} [2024-06-27 20:02:33,825 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 55 predicate places. [2024-06-27 20:02:33,825 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 112 transitions, 918 flow [2024-06-27 20:02:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:33,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:33,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:02:33,826 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 20:02:33,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:33,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1453601243, now seen corresponding path program 3 times [2024-06-27 20:02:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061930635] [2024-06-27 20:02:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:33,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:35,004 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 20:02:35,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:35,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061930635] [2024-06-27 20:02:35,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061930635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:35,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46704220] [2024-06-27 20:02:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:35,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:35,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:35,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 112 transitions, 918 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:35,734 INFO L124 PetriNetUnfolderBase]: 2486/3796 cut-off events. [2024-06-27 20:02:35,735 INFO L125 PetriNetUnfolderBase]: For 94049/94049 co-relation queries the response was YES. [2024-06-27 20:02:35,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22243 conditions, 3796 events. 2486/3796 cut-off events. For 94049/94049 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19421 event pairs, 669 based on Foata normal form. 4/3791 useless extension candidates. Maximal degree in co-relation 22202. Up to 3183 conditions per place. [2024-06-27 20:02:35,756 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 93 selfloop transitions, 55 changer transitions 0/155 dead transitions. [2024-06-27 20:02:35,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 155 transitions, 1460 flow [2024-06-27 20:02:35,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:35,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 20:02:35,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4780361757105943 [2024-06-27 20:02:35,757 INFO L175 Difference]: Start difference. First operand has 99 places, 112 transitions, 918 flow. Second operand 9 states and 185 transitions. [2024-06-27 20:02:35,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 155 transitions, 1460 flow [2024-06-27 20:02:35,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 155 transitions, 1355 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:35,805 INFO L231 Difference]: Finished difference. Result has 103 places, 115 transitions, 985 flow [2024-06-27 20:02:35,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=985, PETRI_PLACES=103, PETRI_TRANSITIONS=115} [2024-06-27 20:02:35,806 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-27 20:02:35,806 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 115 transitions, 985 flow [2024-06-27 20:02:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:35,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:35,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:35,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:02:35,807 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 20:02:35,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash -14431033, now seen corresponding path program 4 times [2024-06-27 20:02:35,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:35,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582234121] [2024-06-27 20:02:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:35,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582234121] [2024-06-27 20:02:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582234121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497514259] [2024-06-27 20:02:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:37,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:37,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:37,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:37,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 115 transitions, 985 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:37,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:37,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:37,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:37,725 INFO L124 PetriNetUnfolderBase]: 2508/3828 cut-off events. [2024-06-27 20:02:37,725 INFO L125 PetriNetUnfolderBase]: For 101058/101058 co-relation queries the response was YES. [2024-06-27 20:02:37,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22883 conditions, 3828 events. 2508/3828 cut-off events. For 101058/101058 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19592 event pairs, 680 based on Foata normal form. 4/3823 useless extension candidates. Maximal degree in co-relation 22840. Up to 3202 conditions per place. [2024-06-27 20:02:37,757 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 92 selfloop transitions, 56 changer transitions 0/155 dead transitions. [2024-06-27 20:02:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1521 flow [2024-06-27 20:02:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 20:02:37,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-27 20:02:37,759 INFO L175 Difference]: Start difference. First operand has 103 places, 115 transitions, 985 flow. Second operand 9 states and 183 transitions. [2024-06-27 20:02:37,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1521 flow [2024-06-27 20:02:37,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 155 transitions, 1400 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:37,846 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 1036 flow [2024-06-27 20:02:37,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1036, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-06-27 20:02:37,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-27 20:02:37,847 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 1036 flow [2024-06-27 20:02:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:37,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:37,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:37,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:02:37,848 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 20:02:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1626337397, now seen corresponding path program 1 times [2024-06-27 20:02:37,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:37,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265150304] [2024-06-27 20:02:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:39,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:39,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265150304] [2024-06-27 20:02:39,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265150304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:39,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:39,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339368308] [2024-06-27 20:02:39,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:39,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:39,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:39,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:39,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 1036 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:39,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:39,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:39,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:39,984 INFO L124 PetriNetUnfolderBase]: 2558/3909 cut-off events. [2024-06-27 20:02:39,985 INFO L125 PetriNetUnfolderBase]: For 113184/113192 co-relation queries the response was YES. [2024-06-27 20:02:39,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23781 conditions, 3909 events. 2558/3909 cut-off events. For 113184/113192 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19544 event pairs, 830 based on Foata normal form. 12/3907 useless extension candidates. Maximal degree in co-relation 23737. Up to 3560 conditions per place. [2024-06-27 20:02:40,006 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 117 selfloop transitions, 26 changer transitions 0/153 dead transitions. [2024-06-27 20:02:40,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1464 flow [2024-06-27 20:02:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:02:40,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4563953488372093 [2024-06-27 20:02:40,008 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 1036 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:02:40,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1464 flow [2024-06-27 20:02:40,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 153 transitions, 1341 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:40,082 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 1044 flow [2024-06-27 20:02:40,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1044, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-27 20:02:40,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-27 20:02:40,082 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 1044 flow [2024-06-27 20:02:40,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:40,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:40,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:40,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:02:40,083 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:40,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 104808932, now seen corresponding path program 1 times [2024-06-27 20:02:40,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334343876] [2024-06-27 20:02:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334343876] [2024-06-27 20:02:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334343876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:40,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:40,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205305608] [2024-06-27 20:02:40,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:40,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:40,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:41,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:41,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 1044 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 20:02:41,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:41,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:41,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:41,593 INFO L124 PetriNetUnfolderBase]: 2547/3884 cut-off events. [2024-06-27 20:02:41,593 INFO L125 PetriNetUnfolderBase]: For 120681/120715 co-relation queries the response was YES. [2024-06-27 20:02:41,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24271 conditions, 3884 events. 2547/3884 cut-off events. For 120681/120715 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19374 event pairs, 909 based on Foata normal form. 5/3851 useless extension candidates. Maximal degree in co-relation 24225. Up to 3700 conditions per place. [2024-06-27 20:02:41,617 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 115 selfloop transitions, 16 changer transitions 0/145 dead transitions. [2024-06-27 20:02:41,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 145 transitions, 1460 flow [2024-06-27 20:02:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-27 20:02:41,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-27 20:02:41,618 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 1044 flow. Second operand 6 states and 116 transitions. [2024-06-27 20:02:41,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 145 transitions, 1460 flow [2024-06-27 20:02:41,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 145 transitions, 1377 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:41,687 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1069 flow [2024-06-27 20:02:41,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1069, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-27 20:02:41,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-27 20:02:41,688 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1069 flow [2024-06-27 20:02:41,688 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 20:02:41,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:41,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:02:41,688 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:41,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash 854168209, now seen corresponding path program 2 times [2024-06-27 20:02:41,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510359635] [2024-06-27 20:02:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510359635] [2024-06-27 20:02:42,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510359635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:42,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:42,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:42,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307982648] [2024-06-27 20:02:42,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:42,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:42,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:42,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:43,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:43,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1069 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:43,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:43,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:43,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:43,646 INFO L124 PetriNetUnfolderBase]: 2583/3939 cut-off events. [2024-06-27 20:02:43,646 INFO L125 PetriNetUnfolderBase]: For 131294/131315 co-relation queries the response was YES. [2024-06-27 20:02:43,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24969 conditions, 3939 events. 2583/3939 cut-off events. For 131294/131315 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19665 event pairs, 844 based on Foata normal form. 8/3918 useless extension candidates. Maximal degree in co-relation 24922. Up to 3635 conditions per place. [2024-06-27 20:02:43,673 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 127 selfloop transitions, 21 changer transitions 0/160 dead transitions. [2024-06-27 20:02:43,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 160 transitions, 1504 flow [2024-06-27 20:02:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:43,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:02:43,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:02:43,674 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1069 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:02:43,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 160 transitions, 1504 flow [2024-06-27 20:02:43,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 160 transitions, 1470 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 20:02:43,749 INFO L231 Difference]: Finished difference. Result has 117 places, 134 transitions, 1169 flow [2024-06-27 20:02:43,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1169, PETRI_PLACES=117, PETRI_TRANSITIONS=134} [2024-06-27 20:02:43,750 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-27 20:02:43,750 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 134 transitions, 1169 flow [2024-06-27 20:02:43,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:43,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:43,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:43,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:02:43,751 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 20:02:43,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1139268079, now seen corresponding path program 3 times [2024-06-27 20:02:43,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:43,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595651851] [2024-06-27 20:02:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:43,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:44,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:44,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595651851] [2024-06-27 20:02:44,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595651851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:44,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:44,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460389501] [2024-06-27 20:02:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:44,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:44,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:44,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:44,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 134 transitions, 1169 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:44,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:44,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:44,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:45,662 INFO L124 PetriNetUnfolderBase]: 2600/3961 cut-off events. [2024-06-27 20:02:45,662 INFO L125 PetriNetUnfolderBase]: For 143135/143155 co-relation queries the response was YES. [2024-06-27 20:02:45,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25978 conditions, 3961 events. 2600/3961 cut-off events. For 143135/143155 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19756 event pairs, 851 based on Foata normal form. 12/3951 useless extension candidates. Maximal degree in co-relation 25928. Up to 3689 conditions per place. [2024-06-27 20:02:45,688 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 133 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-27 20:02:45,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 161 transitions, 1579 flow [2024-06-27 20:02:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:02:45,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:02:45,689 INFO L175 Difference]: Start difference. First operand has 117 places, 134 transitions, 1169 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:02:45,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 161 transitions, 1579 flow [2024-06-27 20:02:45,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 161 transitions, 1492 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:45,746 INFO L231 Difference]: Finished difference. Result has 120 places, 136 transitions, 1173 flow [2024-06-27 20:02:45,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1173, PETRI_PLACES=120, PETRI_TRANSITIONS=136} [2024-06-27 20:02:45,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-27 20:02:45,746 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 136 transitions, 1173 flow [2024-06-27 20:02:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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 20:02:45,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:45,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:45,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:02:45,747 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 20:02:45,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 853921945, now seen corresponding path program 5 times [2024-06-27 20:02:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:45,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405633317] [2024-06-27 20:02:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:45,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:46,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:46,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405633317] [2024-06-27 20:02:46,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405633317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:46,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:46,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:46,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365529576] [2024-06-27 20:02:46,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:46,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:46,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:46,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:46,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:46,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:46,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 136 transitions, 1173 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:46,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:46,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:46,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:47,640 INFO L124 PetriNetUnfolderBase]: 2542/3886 cut-off events. [2024-06-27 20:02:47,641 INFO L125 PetriNetUnfolderBase]: For 145403/145417 co-relation queries the response was YES. [2024-06-27 20:02:47,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25416 conditions, 3886 events. 2542/3886 cut-off events. For 145403/145417 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19902 event pairs, 792 based on Foata normal form. 6/3872 useless extension candidates. Maximal degree in co-relation 25365. Up to 3540 conditions per place. [2024-06-27 20:02:47,670 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 129 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-27 20:02:47,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1569 flow [2024-06-27 20:02:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:47,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:02:47,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 20:02:47,671 INFO L175 Difference]: Start difference. First operand has 120 places, 136 transitions, 1173 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:02:47,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1569 flow [2024-06-27 20:02:47,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 167 transitions, 1472 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:47,753 INFO L231 Difference]: Finished difference. Result has 124 places, 136 transitions, 1138 flow [2024-06-27 20:02:47,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1138, PETRI_PLACES=124, PETRI_TRANSITIONS=136} [2024-06-27 20:02:47,754 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 20:02:47,754 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 136 transitions, 1138 flow [2024-06-27 20:02:47,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:47,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:47,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:02:47,755 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 20:02:47,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1932946555, now seen corresponding path program 4 times [2024-06-27 20:02:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:47,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606213885] [2024-06-27 20:02:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:49,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606213885] [2024-06-27 20:02:49,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606213885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:49,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398761197] [2024-06-27 20:02:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:49,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:49,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:49,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 136 transitions, 1138 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:49,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:49,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:49,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:49,964 INFO L124 PetriNetUnfolderBase]: 2602/3972 cut-off events. [2024-06-27 20:02:49,964 INFO L125 PetriNetUnfolderBase]: For 159727/159750 co-relation queries the response was YES. [2024-06-27 20:02:49,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26570 conditions, 3972 events. 2602/3972 cut-off events. For 159727/159750 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19870 event pairs, 847 based on Foata normal form. 10/3960 useless extension candidates. Maximal degree in co-relation 26518. Up to 3659 conditions per place. [2024-06-27 20:02:49,994 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 128 selfloop transitions, 23 changer transitions 0/163 dead transitions. [2024-06-27 20:02:49,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 163 transitions, 1556 flow [2024-06-27 20:02:49,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:49,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:02:49,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:02:49,995 INFO L175 Difference]: Start difference. First operand has 124 places, 136 transitions, 1138 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:02:49,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 163 transitions, 1556 flow [2024-06-27 20:02:50,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1423 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 20:02:50,130 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1117 flow [2024-06-27 20:02:50,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1117, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-27 20:02:50,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-27 20:02:50,131 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1117 flow [2024-06-27 20:02:50,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:50,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:50,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:02:50,131 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 20:02:50,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:50,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1252810559, now seen corresponding path program 1 times [2024-06-27 20:02:50,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:50,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070945492] [2024-06-27 20:02:50,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:50,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:51,286 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 20:02:51,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:51,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070945492] [2024-06-27 20:02:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070945492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:51,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:51,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:51,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546051480] [2024-06-27 20:02:51,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:51,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:51,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:51,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:51,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:51,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:51,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1117 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 20:02:51,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:51,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:51,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:52,194 INFO L124 PetriNetUnfolderBase]: 2768/4175 cut-off events. [2024-06-27 20:02:52,195 INFO L125 PetriNetUnfolderBase]: For 167044/167044 co-relation queries the response was YES. [2024-06-27 20:02:52,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27743 conditions, 4175 events. 2768/4175 cut-off events. For 167044/167044 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20395 event pairs, 871 based on Foata normal form. 2/4175 useless extension candidates. Maximal degree in co-relation 27690. Up to 3936 conditions per place. [2024-06-27 20:02:52,224 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 137 selfloop transitions, 25 changer transitions 0/169 dead transitions. [2024-06-27 20:02:52,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 169 transitions, 1588 flow [2024-06-27 20:02:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:52,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:52,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:02:52,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:02:52,225 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1117 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:02:52,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 169 transitions, 1588 flow [2024-06-27 20:02:52,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 169 transitions, 1494 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:52,317 INFO L231 Difference]: Finished difference. Result has 124 places, 144 transitions, 1178 flow [2024-06-27 20:02:52,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1178, PETRI_PLACES=124, PETRI_TRANSITIONS=144} [2024-06-27 20:02:52,318 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-27 20:02:52,318 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 144 transitions, 1178 flow [2024-06-27 20:02:52,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:52,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:52,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:52,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:02:52,319 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 20:02:52,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:52,319 INFO L85 PathProgramCache]: Analyzing trace with hash 862510309, now seen corresponding path program 5 times [2024-06-27 20:02:52,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:52,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597361775] [2024-06-27 20:02:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597361775] [2024-06-27 20:02:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597361775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:53,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:53,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:53,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217603330] [2024-06-27 20:02:53,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:53,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:53,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:53,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:53,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 144 transitions, 1178 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:53,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:53,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:53,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:54,126 INFO L124 PetriNetUnfolderBase]: 2623/4006 cut-off events. [2024-06-27 20:02:54,126 INFO L125 PetriNetUnfolderBase]: For 166262/166279 co-relation queries the response was YES. [2024-06-27 20:02:54,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26910 conditions, 4006 events. 2623/4006 cut-off events. For 166262/166279 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20124 event pairs, 818 based on Foata normal form. 12/4002 useless extension candidates. Maximal degree in co-relation 26856. Up to 3708 conditions per place. [2024-06-27 20:02:54,153 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 140 selfloop transitions, 17 changer transitions 0/171 dead transitions. [2024-06-27 20:02:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 1608 flow [2024-06-27 20:02:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:02:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:02:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:02:54,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:02:54,155 INFO L175 Difference]: Start difference. First operand has 124 places, 144 transitions, 1178 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:02:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 1608 flow [2024-06-27 20:02:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 171 transitions, 1528 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:54,243 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1197 flow [2024-06-27 20:02:54,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-27 20:02:54,244 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 20:02:54,244 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1197 flow [2024-06-27 20:02:54,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 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 20:02:54,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:54,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:54,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:02:54,245 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:54,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 105254402, now seen corresponding path program 2 times [2024-06-27 20:02:54,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:54,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063118297] [2024-06-27 20:02:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063118297] [2024-06-27 20:02:54,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063118297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:54,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:54,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533497027] [2024-06-27 20:02:54,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:54,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:02:54,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1197 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 20:02:54,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:54,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:02:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:55,514 INFO L124 PetriNetUnfolderBase]: 2611/3965 cut-off events. [2024-06-27 20:02:55,514 INFO L125 PetriNetUnfolderBase]: For 174795/174836 co-relation queries the response was YES. [2024-06-27 20:02:55,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27254 conditions, 3965 events. 2611/3965 cut-off events. For 174795/174836 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 19620 event pairs, 883 based on Foata normal form. 11/3927 useless extension candidates. Maximal degree in co-relation 27199. Up to 3808 conditions per place. [2024-06-27 20:02:55,545 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 128 selfloop transitions, 11 changer transitions 0/155 dead transitions. [2024-06-27 20:02:55,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 155 transitions, 1497 flow [2024-06-27 20:02:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-27 20:02:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-27 20:02:55,547 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1197 flow. Second operand 6 states and 107 transitions. [2024-06-27 20:02:55,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 155 transitions, 1497 flow [2024-06-27 20:02:55,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 155 transitions, 1396 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:55,651 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1124 flow [2024-06-27 20:02:55,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1096, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1124, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-27 20:02:55,652 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-27 20:02:55,652 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1124 flow [2024-06-27 20:02:55,652 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 20:02:55,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:55,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:02:55,652 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:55,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:55,652 INFO L85 PathProgramCache]: Analyzing trace with hash -343741662, now seen corresponding path program 1 times [2024-06-27 20:02:55,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:55,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472457642] [2024-06-27 20:02:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:55,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:56,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:56,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472457642] [2024-06-27 20:02:56,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472457642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:56,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:56,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:56,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779945647] [2024-06-27 20:02:56,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:56,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:56,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:56,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:56,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1124 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 20:02:56,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:56,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:56,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:57,011 INFO L124 PetriNetUnfolderBase]: 2811/4199 cut-off events. [2024-06-27 20:02:57,011 INFO L125 PetriNetUnfolderBase]: For 183969/183986 co-relation queries the response was YES. [2024-06-27 20:02:57,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28274 conditions, 4199 events. 2811/4199 cut-off events. For 183969/183986 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20296 event pairs, 925 based on Foata normal form. 9/4194 useless extension candidates. Maximal degree in co-relation 28218. Up to 4091 conditions per place. [2024-06-27 20:02:57,040 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 139 selfloop transitions, 16 changer transitions 0/165 dead transitions. [2024-06-27 20:02:57,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 165 transitions, 1582 flow [2024-06-27 20:02:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-27 20:02:57,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:02:57,041 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1124 flow. Second operand 6 states and 108 transitions. [2024-06-27 20:02:57,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 165 transitions, 1582 flow [2024-06-27 20:02:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 165 transitions, 1550 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:02:57,138 INFO L231 Difference]: Finished difference. Result has 127 places, 152 transitions, 1188 flow [2024-06-27 20:02:57,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1188, PETRI_PLACES=127, PETRI_TRANSITIONS=152} [2024-06-27 20:02:57,138 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-27 20:02:57,138 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 152 transitions, 1188 flow [2024-06-27 20:02:57,138 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 20:02:57,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:57,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:57,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:02:57,139 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:02:57,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash 120744048, now seen corresponding path program 2 times [2024-06-27 20:02:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:57,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269345611] [2024-06-27 20:02:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:57,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269345611] [2024-06-27 20:02:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269345611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:57,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:02:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157510479] [2024-06-27 20:02:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:02:57,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:02:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:02:57,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:02:57,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 152 transitions, 1188 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 20:02:57,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:57,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:02:57,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:58,483 INFO L124 PetriNetUnfolderBase]: 2808/4196 cut-off events. [2024-06-27 20:02:58,483 INFO L125 PetriNetUnfolderBase]: For 194079/194096 co-relation queries the response was YES. [2024-06-27 20:02:58,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28974 conditions, 4196 events. 2808/4196 cut-off events. For 194079/194096 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20331 event pairs, 923 based on Foata normal form. 9/4184 useless extension candidates. Maximal degree in co-relation 28917. Up to 4088 conditions per place. [2024-06-27 20:02:58,515 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 135 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-27 20:02:58,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1512 flow [2024-06-27 20:02:58,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:02:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:02:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 20:02:58,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-27 20:02:58,516 INFO L175 Difference]: Start difference. First operand has 127 places, 152 transitions, 1188 flow. Second operand 6 states and 104 transitions. [2024-06-27 20:02:58,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1512 flow [2024-06-27 20:02:58,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 161 transitions, 1466 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 20:02:58,617 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1180 flow [2024-06-27 20:02:58,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2024-06-27 20:02:58,618 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 87 predicate places. [2024-06-27 20:02:58,618 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1180 flow [2024-06-27 20:02:58,618 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 20:02:58,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:58,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:58,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:02:58,618 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 20:02:58,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1647279816, now seen corresponding path program 1 times [2024-06-27 20:02:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:58,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365471388] [2024-06-27 20:02:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:58,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:00,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:00,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365471388] [2024-06-27 20:03:00,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365471388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:00,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:00,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:00,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678637071] [2024-06-27 20:03:00,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:00,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:00,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1180 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:00,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:00,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:00,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:01,079 INFO L124 PetriNetUnfolderBase]: 2675/4086 cut-off events. [2024-06-27 20:03:01,079 INFO L125 PetriNetUnfolderBase]: For 202660/202660 co-relation queries the response was YES. [2024-06-27 20:03:01,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28326 conditions, 4086 events. 2675/4086 cut-off events. For 202660/202660 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21062 event pairs, 766 based on Foata normal form. 4/4067 useless extension candidates. Maximal degree in co-relation 28267. Up to 3717 conditions per place. [2024-06-27 20:03:01,110 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 169 selfloop transitions, 29 changer transitions 0/213 dead transitions. [2024-06-27 20:03:01,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 213 transitions, 1968 flow [2024-06-27 20:03:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:03:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:03:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 20:03:01,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-27 20:03:01,111 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1180 flow. Second operand 11 states and 220 transitions. [2024-06-27 20:03:01,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 213 transitions, 1968 flow [2024-06-27 20:03:01,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 213 transitions, 1924 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:01,219 INFO L231 Difference]: Finished difference. Result has 136 places, 158 transitions, 1332 flow [2024-06-27 20:03:01,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1332, PETRI_PLACES=136, PETRI_TRANSITIONS=158} [2024-06-27 20:03:01,220 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 92 predicate places. [2024-06-27 20:03:01,220 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 158 transitions, 1332 flow [2024-06-27 20:03:01,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:01,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:01,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:01,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:03:01,220 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 20:03:01,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:01,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1967932204, now seen corresponding path program 2 times [2024-06-27 20:03:01,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:01,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087496325] [2024-06-27 20:03:01,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:01,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087496325] [2024-06-27 20:03:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087496325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:02,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:02,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979907736] [2024-06-27 20:03:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:03,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:03,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 158 transitions, 1332 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:03,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:03,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:03,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:03,926 INFO L124 PetriNetUnfolderBase]: 2668/4075 cut-off events. [2024-06-27 20:03:03,927 INFO L125 PetriNetUnfolderBase]: For 213189/213189 co-relation queries the response was YES. [2024-06-27 20:03:03,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28961 conditions, 4075 events. 2668/4075 cut-off events. For 213189/213189 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21016 event pairs, 772 based on Foata normal form. 4/4054 useless extension candidates. Maximal degree in co-relation 28902. Up to 3743 conditions per place. [2024-06-27 20:03:03,956 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 165 selfloop transitions, 23 changer transitions 0/203 dead transitions. [2024-06-27 20:03:03,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 203 transitions, 1826 flow [2024-06-27 20:03:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 20:03:03,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-27 20:03:03,958 INFO L175 Difference]: Start difference. First operand has 136 places, 158 transitions, 1332 flow. Second operand 10 states and 196 transitions. [2024-06-27 20:03:03,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 203 transitions, 1826 flow [2024-06-27 20:03:04,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 203 transitions, 1692 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:04,074 INFO L231 Difference]: Finished difference. Result has 139 places, 158 transitions, 1252 flow [2024-06-27 20:03:04,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1252, PETRI_PLACES=139, PETRI_TRANSITIONS=158} [2024-06-27 20:03:04,074 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-27 20:03:04,074 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 158 transitions, 1252 flow [2024-06-27 20:03:04,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:04,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:04,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:04,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:03:04,075 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:04,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1643470536, now seen corresponding path program 3 times [2024-06-27 20:03:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:04,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100625755] [2024-06-27 20:03:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:04,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:05,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:05,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100625755] [2024-06-27 20:03:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100625755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:05,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817056238] [2024-06-27 20:03:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:05,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:05,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 158 transitions, 1252 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:05,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:05,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:05,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:06,489 INFO L124 PetriNetUnfolderBase]: 2668/4079 cut-off events. [2024-06-27 20:03:06,489 INFO L125 PetriNetUnfolderBase]: For 223880/223880 co-relation queries the response was YES. [2024-06-27 20:03:06,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29178 conditions, 4079 events. 2668/4079 cut-off events. For 223880/223880 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 21172 event pairs, 640 based on Foata normal form. 4/4061 useless extension candidates. Maximal degree in co-relation 29117. Up to 3322 conditions per place. [2024-06-27 20:03:06,516 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 117 selfloop transitions, 81 changer transitions 0/213 dead transitions. [2024-06-27 20:03:06,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 213 transitions, 2052 flow [2024-06-27 20:03:06,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:06,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-27 20:03:06,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4790697674418605 [2024-06-27 20:03:06,517 INFO L175 Difference]: Start difference. First operand has 139 places, 158 transitions, 1252 flow. Second operand 10 states and 206 transitions. [2024-06-27 20:03:06,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 213 transitions, 2052 flow [2024-06-27 20:03:06,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 213 transitions, 1998 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 20:03:06,606 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1543 flow [2024-06-27 20:03:06,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1543, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-27 20:03:06,607 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-27 20:03:06,607 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1543 flow [2024-06-27 20:03:06,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:06,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:06,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:06,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:03:06,608 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 20:03:06,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2111966884, now seen corresponding path program 4 times [2024-06-27 20:03:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:06,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096081560] [2024-06-27 20:03:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:08,104 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 20:03:08,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:08,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096081560] [2024-06-27 20:03:08,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096081560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:08,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:08,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:08,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538366825] [2024-06-27 20:03:08,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:08,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:08,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:08,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:08,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1543 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:08,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:08,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:08,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:08,992 INFO L124 PetriNetUnfolderBase]: 2690/4110 cut-off events. [2024-06-27 20:03:08,992 INFO L125 PetriNetUnfolderBase]: For 239135/239135 co-relation queries the response was YES. [2024-06-27 20:03:09,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30648 conditions, 4110 events. 2690/4110 cut-off events. For 239135/239135 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21375 event pairs, 661 based on Foata normal form. 4/4092 useless extension candidates. Maximal degree in co-relation 30585. Up to 3405 conditions per place. [2024-06-27 20:03:09,026 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 128 selfloop transitions, 67 changer transitions 0/210 dead transitions. [2024-06-27 20:03:09,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 210 transitions, 2125 flow [2024-06-27 20:03:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-27 20:03:09,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46744186046511627 [2024-06-27 20:03:09,029 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1543 flow. Second operand 10 states and 201 transitions. [2024-06-27 20:03:09,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 210 transitions, 2125 flow [2024-06-27 20:03:09,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 210 transitions, 1985 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:09,183 INFO L231 Difference]: Finished difference. Result has 145 places, 167 transitions, 1625 flow [2024-06-27 20:03:09,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1403, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1625, PETRI_PLACES=145, PETRI_TRANSITIONS=167} [2024-06-27 20:03:09,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 101 predicate places. [2024-06-27 20:03:09,184 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 167 transitions, 1625 flow [2024-06-27 20:03:09,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:09,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:09,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:09,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:03:09,185 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 20:03:09,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:09,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2112182365, now seen corresponding path program 1 times [2024-06-27 20:03:09,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:09,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136558370] [2024-06-27 20:03:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:09,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:10,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:10,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136558370] [2024-06-27 20:03:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136558370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:10,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:10,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:10,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755072981] [2024-06-27 20:03:10,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:10,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:10,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:10,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 167 transitions, 1625 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 20:03:10,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:10,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:10,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:11,660 INFO L124 PetriNetUnfolderBase]: 2936/4411 cut-off events. [2024-06-27 20:03:11,660 INFO L125 PetriNetUnfolderBase]: For 262828/262830 co-relation queries the response was YES. [2024-06-27 20:03:11,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33604 conditions, 4411 events. 2936/4411 cut-off events. For 262828/262830 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 21693 event pairs, 793 based on Foata normal form. 6/4412 useless extension candidates. Maximal degree in co-relation 33539. Up to 3998 conditions per place. [2024-06-27 20:03:11,695 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 44 changer transitions 0/210 dead transitions. [2024-06-27 20:03:11,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 210 transitions, 2216 flow [2024-06-27 20:03:11,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:03:11,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:03:11,697 INFO L175 Difference]: Start difference. First operand has 145 places, 167 transitions, 1625 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:03:11,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 210 transitions, 2216 flow [2024-06-27 20:03:11,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2014 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:11,943 INFO L231 Difference]: Finished difference. Result has 147 places, 172 transitions, 1611 flow [2024-06-27 20:03:11,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1611, PETRI_PLACES=147, PETRI_TRANSITIONS=172} [2024-06-27 20:03:11,944 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 103 predicate places. [2024-06-27 20:03:11,944 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 172 transitions, 1611 flow [2024-06-27 20:03:11,944 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 20:03:11,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:11,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:11,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:03:11,945 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:11,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash -990490586, now seen corresponding path program 1 times [2024-06-27 20:03:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743233675] [2024-06-27 20:03:11,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:11,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743233675] [2024-06-27 20:03:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743233675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:12,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172849812] [2024-06-27 20:03:12,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:12,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:12,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:12,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 1611 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 20:03:12,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:12,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:12,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:13,653 INFO L124 PetriNetUnfolderBase]: 2909/4361 cut-off events. [2024-06-27 20:03:13,653 INFO L125 PetriNetUnfolderBase]: For 272984/272993 co-relation queries the response was YES. [2024-06-27 20:03:13,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33981 conditions, 4361 events. 2909/4361 cut-off events. For 272984/272993 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 21376 event pairs, 899 based on Foata normal form. 5/4342 useless extension candidates. Maximal degree in co-relation 33914. Up to 4234 conditions per place. [2024-06-27 20:03:13,684 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 168 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-27 20:03:13,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 201 transitions, 2207 flow [2024-06-27 20:03:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:03:13,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 20:03:13,685 INFO L175 Difference]: Start difference. First operand has 147 places, 172 transitions, 1611 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:03:13,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 201 transitions, 2207 flow [2024-06-27 20:03:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 201 transitions, 2068 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:13,839 INFO L231 Difference]: Finished difference. Result has 148 places, 178 transitions, 1608 flow [2024-06-27 20:03:13,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1608, PETRI_PLACES=148, PETRI_TRANSITIONS=178} [2024-06-27 20:03:13,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-27 20:03:13,840 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 178 transitions, 1608 flow [2024-06-27 20:03:13,840 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 20:03:13,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:13,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:13,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:03:13,841 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 20:03:13,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1130565637, now seen corresponding path program 2 times [2024-06-27 20:03:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:13,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254661023] [2024-06-27 20:03:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:13,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:15,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:15,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254661023] [2024-06-27 20:03:15,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254661023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:15,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:15,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:15,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136580599] [2024-06-27 20:03:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:15,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:15,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:15,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 178 transitions, 1608 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 20:03:15,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:15,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:15,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:16,228 INFO L124 PetriNetUnfolderBase]: 2989/4486 cut-off events. [2024-06-27 20:03:16,228 INFO L125 PetriNetUnfolderBase]: For 288869/288871 co-relation queries the response was YES. [2024-06-27 20:03:16,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34818 conditions, 4486 events. 2989/4486 cut-off events. For 288869/288871 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 22010 event pairs, 799 based on Foata normal form. 6/4490 useless extension candidates. Maximal degree in co-relation 34750. Up to 4056 conditions per place. [2024-06-27 20:03:16,263 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 165 selfloop transitions, 44 changer transitions 0/220 dead transitions. [2024-06-27 20:03:16,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 220 transitions, 2225 flow [2024-06-27 20:03:16,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:03:16,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:03:16,264 INFO L175 Difference]: Start difference. First operand has 148 places, 178 transitions, 1608 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:03:16,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 220 transitions, 2225 flow [2024-06-27 20:03:16,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 220 transitions, 2169 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-27 20:03:16,455 INFO L231 Difference]: Finished difference. Result has 155 places, 184 transitions, 1754 flow [2024-06-27 20:03:16,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1754, PETRI_PLACES=155, PETRI_TRANSITIONS=184} [2024-06-27 20:03:16,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 111 predicate places. [2024-06-27 20:03:16,456 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 184 transitions, 1754 flow [2024-06-27 20:03:16,457 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 20:03:16,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:16,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:16,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:03:16,457 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 20:03:16,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -447360712, now seen corresponding path program 5 times [2024-06-27 20:03:16,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:16,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107103121] [2024-06-27 20:03:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:16,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:17,916 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 20:03:17,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:17,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107103121] [2024-06-27 20:03:17,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107103121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:17,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:17,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779827168] [2024-06-27 20:03:17,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:18,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:18,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 184 transitions, 1754 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:18,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:18,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:18,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:18,936 INFO L124 PetriNetUnfolderBase]: 2843/4336 cut-off events. [2024-06-27 20:03:18,936 INFO L125 PetriNetUnfolderBase]: For 297499/297499 co-relation queries the response was YES. [2024-06-27 20:03:18,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34305 conditions, 4336 events. 2843/4336 cut-off events. For 297499/297499 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 22367 event pairs, 661 based on Foata normal form. 6/4318 useless extension candidates. Maximal degree in co-relation 34234. Up to 3491 conditions per place. [2024-06-27 20:03:18,973 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 134 selfloop transitions, 77 changer transitions 0/230 dead transitions. [2024-06-27 20:03:18,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 230 transitions, 2528 flow [2024-06-27 20:03:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-27 20:03:18,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-27 20:03:18,974 INFO L175 Difference]: Start difference. First operand has 155 places, 184 transitions, 1754 flow. Second operand 10 states and 202 transitions. [2024-06-27 20:03:18,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 230 transitions, 2528 flow [2024-06-27 20:03:19,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 230 transitions, 2381 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:19,253 INFO L231 Difference]: Finished difference. Result has 159 places, 187 transitions, 1859 flow [2024-06-27 20:03:19,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1859, PETRI_PLACES=159, PETRI_TRANSITIONS=187} [2024-06-27 20:03:19,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 115 predicate places. [2024-06-27 20:03:19,254 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 187 transitions, 1859 flow [2024-06-27 20:03:19,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:19,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:19,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:19,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:03:19,254 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 20:03:19,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:19,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2063291653, now seen corresponding path program 3 times [2024-06-27 20:03:19,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:19,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261062540] [2024-06-27 20:03:19,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:19,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261062540] [2024-06-27 20:03:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261062540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:20,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:20,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:20,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713781484] [2024-06-27 20:03:20,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:20,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:20,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:20,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:20,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 187 transitions, 1859 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 20:03:20,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:20,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:20,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:21,529 INFO L124 PetriNetUnfolderBase]: 3039/4561 cut-off events. [2024-06-27 20:03:21,530 INFO L125 PetriNetUnfolderBase]: For 322535/322537 co-relation queries the response was YES. [2024-06-27 20:03:21,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37160 conditions, 4561 events. 3039/4561 cut-off events. For 322535/322537 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 22464 event pairs, 804 based on Foata normal form. 6/4565 useless extension candidates. Maximal degree in co-relation 37088. Up to 4131 conditions per place. [2024-06-27 20:03:21,571 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 168 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-06-27 20:03:21,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 226 transitions, 2480 flow [2024-06-27 20:03:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:21,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:03:21,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:03:21,572 INFO L175 Difference]: Start difference. First operand has 159 places, 187 transitions, 1859 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:03:21,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 226 transitions, 2480 flow [2024-06-27 20:03:21,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 226 transitions, 2282 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:21,816 INFO L231 Difference]: Finished difference. Result has 161 places, 191 transitions, 1855 flow [2024-06-27 20:03:21,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1855, PETRI_PLACES=161, PETRI_TRANSITIONS=191} [2024-06-27 20:03:21,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 117 predicate places. [2024-06-27 20:03:21,816 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 191 transitions, 1855 flow [2024-06-27 20:03:21,816 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 20:03:21,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:21,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:21,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:03:21,817 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 20:03:21,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1123147027, now seen corresponding path program 4 times [2024-06-27 20:03:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:21,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590357007] [2024-06-27 20:03:21,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:21,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:23,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:23,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590357007] [2024-06-27 20:03:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590357007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:23,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:23,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:23,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699268199] [2024-06-27 20:03:23,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:23,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:23,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:23,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:23,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:23,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 191 transitions, 1855 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 20:03:23,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:23,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:23,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:24,440 INFO L124 PetriNetUnfolderBase]: 3064/4596 cut-off events. [2024-06-27 20:03:24,440 INFO L125 PetriNetUnfolderBase]: For 338855/338857 co-relation queries the response was YES. [2024-06-27 20:03:24,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37603 conditions, 4596 events. 3064/4596 cut-off events. For 338855/338857 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 22675 event pairs, 780 based on Foata normal form. 6/4590 useless extension candidates. Maximal degree in co-relation 37530. Up to 4093 conditions per place. [2024-06-27 20:03:24,482 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 163 selfloop transitions, 54 changer transitions 0/228 dead transitions. [2024-06-27 20:03:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 228 transitions, 2459 flow [2024-06-27 20:03:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:03:24,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-27 20:03:24,486 INFO L175 Difference]: Start difference. First operand has 161 places, 191 transitions, 1855 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:03:24,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 228 transitions, 2459 flow [2024-06-27 20:03:24,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 228 transitions, 2320 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:24,736 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 1905 flow [2024-06-27 20:03:24,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1716, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1905, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-27 20:03:24,736 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 121 predicate places. [2024-06-27 20:03:24,736 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 1905 flow [2024-06-27 20:03:24,737 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 20:03:24,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:24,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:24,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:03:24,737 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:24,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:24,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1992490072, now seen corresponding path program 1 times [2024-06-27 20:03:24,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:24,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607656657] [2024-06-27 20:03:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:24,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:25,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:25,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:25,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607656657] [2024-06-27 20:03:25,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607656657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:25,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376435284] [2024-06-27 20:03:25,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:25,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:25,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:25,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:25,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:25,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 1905 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:25,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:25,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:25,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:26,429 INFO L124 PetriNetUnfolderBase]: 2912/4436 cut-off events. [2024-06-27 20:03:26,429 INFO L125 PetriNetUnfolderBase]: For 351796/351835 co-relation queries the response was YES. [2024-06-27 20:03:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37252 conditions, 4436 events. 2912/4436 cut-off events. For 351796/351835 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22558 event pairs, 885 based on Foata normal form. 9/4412 useless extension candidates. Maximal degree in co-relation 37178. Up to 4153 conditions per place. [2024-06-27 20:03:26,463 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 175 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2024-06-27 20:03:26,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 223 transitions, 2537 flow [2024-06-27 20:03:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:03:26,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-27 20:03:26,464 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 1905 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:03:26,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 223 transitions, 2537 flow [2024-06-27 20:03:26,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 223 transitions, 2366 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:26,657 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 1904 flow [2024-06-27 20:03:26,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1734, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1904, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2024-06-27 20:03:26,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-27 20:03:26,658 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 1904 flow [2024-06-27 20:03:26,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:26,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:26,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:26,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:03:26,658 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:26,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1992489638, now seen corresponding path program 2 times [2024-06-27 20:03:26,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:26,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104468086] [2024-06-27 20:03:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:26,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:27,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:27,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104468086] [2024-06-27 20:03:27,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104468086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:27,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:27,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551514553] [2024-06-27 20:03:27,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:27,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:27,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 1904 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 20:03:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:27,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:27,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:28,342 INFO L124 PetriNetUnfolderBase]: 3051/4577 cut-off events. [2024-06-27 20:03:28,342 INFO L125 PetriNetUnfolderBase]: For 366362/366366 co-relation queries the response was YES. [2024-06-27 20:03:28,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38799 conditions, 4577 events. 3051/4577 cut-off events. For 366362/366366 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22618 event pairs, 911 based on Foata normal form. 5/4565 useless extension candidates. Maximal degree in co-relation 38723. Up to 4444 conditions per place. [2024-06-27 20:03:28,375 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 187 selfloop transitions, 26 changer transitions 0/222 dead transitions. [2024-06-27 20:03:28,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 222 transitions, 2500 flow [2024-06-27 20:03:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:28,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:03:28,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:03:28,376 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 1904 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:03:28,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 222 transitions, 2500 flow [2024-06-27 20:03:28,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 2456 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 20:03:28,597 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 1956 flow [2024-06-27 20:03:28,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1956, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-27 20:03:28,597 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-27 20:03:28,597 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 1956 flow [2024-06-27 20:03:28,598 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 20:03:28,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:28,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:28,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:03:28,598 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 20:03:28,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash -473904301, now seen corresponding path program 5 times [2024-06-27 20:03:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:28,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923570527] [2024-06-27 20:03:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:28,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:29,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:29,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923570527] [2024-06-27 20:03:29,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923570527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:29,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:29,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:29,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153970376] [2024-06-27 20:03:29,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:29,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:30,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:30,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 1956 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 20:03:30,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:30,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:30,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:31,036 INFO L124 PetriNetUnfolderBase]: 3131/4695 cut-off events. [2024-06-27 20:03:31,036 INFO L125 PetriNetUnfolderBase]: For 382091/382091 co-relation queries the response was YES. [2024-06-27 20:03:31,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39554 conditions, 4695 events. 3131/4695 cut-off events. For 382091/382091 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23107 event pairs, 864 based on Foata normal form. 4/4697 useless extension candidates. Maximal degree in co-relation 39475. Up to 4386 conditions per place. [2024-06-27 20:03:31,074 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-27 20:03:31,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 242 transitions, 2617 flow [2024-06-27 20:03:31,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:31,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:03:31,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 20:03:31,075 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 1956 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:03:31,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 242 transitions, 2617 flow [2024-06-27 20:03:31,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 242 transitions, 2555 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-27 20:03:31,467 INFO L231 Difference]: Finished difference. Result has 177 places, 211 transitions, 2096 flow [2024-06-27 20:03:31,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2096, PETRI_PLACES=177, PETRI_TRANSITIONS=211} [2024-06-27 20:03:31,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-27 20:03:31,468 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 211 transitions, 2096 flow [2024-06-27 20:03:31,468 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 20:03:31,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:31,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:31,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:03:31,468 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:31,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -387062206, now seen corresponding path program 6 times [2024-06-27 20:03:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043561579] [2024-06-27 20:03:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:31,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:31,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043561579] [2024-06-27 20:03:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043561579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:32,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:32,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868532281] [2024-06-27 20:03:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:32,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:32,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:33,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:33,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 211 transitions, 2096 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:33,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:33,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:33,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:33,992 INFO L124 PetriNetUnfolderBase]: 2921/4457 cut-off events. [2024-06-27 20:03:33,992 INFO L125 PetriNetUnfolderBase]: For 382580/382580 co-relation queries the response was YES. [2024-06-27 20:03:34,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 4457 events. 2921/4457 cut-off events. For 382580/382580 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23007 event pairs, 758 based on Foata normal form. 4/4444 useless extension candidates. Maximal degree in co-relation 37899. Up to 3994 conditions per place. [2024-06-27 20:03:34,038 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 193 selfloop transitions, 36 changer transitions 0/250 dead transitions. [2024-06-27 20:03:34,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 250 transitions, 2748 flow [2024-06-27 20:03:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:03:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:03:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-27 20:03:34,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-27 20:03:34,040 INFO L175 Difference]: Start difference. First operand has 177 places, 211 transitions, 2096 flow. Second operand 10 states and 187 transitions. [2024-06-27 20:03:34,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 250 transitions, 2748 flow [2024-06-27 20:03:34,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 250 transitions, 2607 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:34,330 INFO L231 Difference]: Finished difference. Result has 181 places, 214 transitions, 2137 flow [2024-06-27 20:03:34,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2137, PETRI_PLACES=181, PETRI_TRANSITIONS=214} [2024-06-27 20:03:34,330 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-27 20:03:34,331 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 214 transitions, 2137 flow [2024-06-27 20:03:34,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:34,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:34,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:34,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:03:34,331 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:34,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:34,331 INFO L85 PathProgramCache]: Analyzing trace with hash 709402621, now seen corresponding path program 6 times [2024-06-27 20:03:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:34,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836041877] [2024-06-27 20:03:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:35,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:35,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836041877] [2024-06-27 20:03:35,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836041877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:35,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:35,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:35,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056184722] [2024-06-27 20:03:35,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:35,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:35,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:35,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:35,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:35,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:35,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 214 transitions, 2137 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 20:03:35,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:35,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:35,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:36,856 INFO L124 PetriNetUnfolderBase]: 3149/4724 cut-off events. [2024-06-27 20:03:36,856 INFO L125 PetriNetUnfolderBase]: For 416554/416554 co-relation queries the response was YES. [2024-06-27 20:03:36,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41102 conditions, 4724 events. 3149/4724 cut-off events. For 416554/416554 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 23344 event pairs, 862 based on Foata normal form. 4/4726 useless extension candidates. Maximal degree in co-relation 41020. Up to 4415 conditions per place. [2024-06-27 20:03:36,894 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 31 changer transitions 0/249 dead transitions. [2024-06-27 20:03:36,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 249 transitions, 2801 flow [2024-06-27 20:03:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:03:36,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 20:03:36,896 INFO L175 Difference]: Start difference. First operand has 181 places, 214 transitions, 2137 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:03:36,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 249 transitions, 2801 flow [2024-06-27 20:03:37,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 249 transitions, 2639 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:37,216 INFO L231 Difference]: Finished difference. Result has 182 places, 218 transitions, 2156 flow [2024-06-27 20:03:37,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2156, PETRI_PLACES=182, PETRI_TRANSITIONS=218} [2024-06-27 20:03:37,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 138 predicate places. [2024-06-27 20:03:37,217 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 218 transitions, 2156 flow [2024-06-27 20:03:37,217 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 20:03:37,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:37,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:37,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:03:37,217 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:37,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:37,218 INFO L85 PathProgramCache]: Analyzing trace with hash -379428115, now seen corresponding path program 7 times [2024-06-27 20:03:37,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:37,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667111556] [2024-06-27 20:03:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:37,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:38,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:38,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667111556] [2024-06-27 20:03:38,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667111556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:38,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:38,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:38,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823840523] [2024-06-27 20:03:38,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:38,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:38,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:38,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:38,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:38,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:38,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 218 transitions, 2156 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 20:03:38,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:38,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:38,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:39,689 INFO L124 PetriNetUnfolderBase]: 3166/4751 cut-off events. [2024-06-27 20:03:39,689 INFO L125 PetriNetUnfolderBase]: For 433526/433526 co-relation queries the response was YES. [2024-06-27 20:03:39,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41540 conditions, 4751 events. 3166/4751 cut-off events. For 433526/433526 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 23527 event pairs, 867 based on Foata normal form. 4/4753 useless extension candidates. Maximal degree in co-relation 41457. Up to 4383 conditions per place. [2024-06-27 20:03:39,728 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 203 selfloop transitions, 36 changer transitions 0/251 dead transitions. [2024-06-27 20:03:39,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 251 transitions, 2798 flow [2024-06-27 20:03:39,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:03:39,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-27 20:03:39,729 INFO L175 Difference]: Start difference. First operand has 182 places, 218 transitions, 2156 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:03:39,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 251 transitions, 2798 flow [2024-06-27 20:03:40,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 251 transitions, 2673 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:40,097 INFO L231 Difference]: Finished difference. Result has 186 places, 220 transitions, 2198 flow [2024-06-27 20:03:40,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2198, PETRI_PLACES=186, PETRI_TRANSITIONS=220} [2024-06-27 20:03:40,098 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 142 predicate places. [2024-06-27 20:03:40,098 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 220 transitions, 2198 flow [2024-06-27 20:03:40,098 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 20:03:40,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:40,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:40,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:03:40,098 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:40,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -311621181, now seen corresponding path program 8 times [2024-06-27 20:03:40,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:40,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241890434] [2024-06-27 20:03:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:40,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:41,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:41,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241890434] [2024-06-27 20:03:41,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241890434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:41,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:41,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569452155] [2024-06-27 20:03:41,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:41,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:41,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:41,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:41,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:41,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 220 transitions, 2198 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 20:03:41,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:41,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:41,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:42,604 INFO L124 PetriNetUnfolderBase]: 3208/4817 cut-off events. [2024-06-27 20:03:42,604 INFO L125 PetriNetUnfolderBase]: For 458169/458169 co-relation queries the response was YES. [2024-06-27 20:03:42,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42785 conditions, 4817 events. 3208/4817 cut-off events. For 458169/458169 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23948 event pairs, 874 based on Foata normal form. 4/4819 useless extension candidates. Maximal degree in co-relation 42701. Up to 4478 conditions per place. [2024-06-27 20:03:42,644 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 213 selfloop transitions, 31 changer transitions 0/256 dead transitions. [2024-06-27 20:03:42,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 256 transitions, 3124 flow [2024-06-27 20:03:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:03:42,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-27 20:03:42,645 INFO L175 Difference]: Start difference. First operand has 186 places, 220 transitions, 2198 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:03:42,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 256 transitions, 3124 flow [2024-06-27 20:03:43,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 256 transitions, 2975 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:43,083 INFO L231 Difference]: Finished difference. Result has 188 places, 224 transitions, 2299 flow [2024-06-27 20:03:43,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2299, PETRI_PLACES=188, PETRI_TRANSITIONS=224} [2024-06-27 20:03:43,083 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-27 20:03:43,083 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 224 transitions, 2299 flow [2024-06-27 20:03:43,083 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 20:03:43,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:43,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:03:43,084 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 20:03:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:43,084 INFO L85 PathProgramCache]: Analyzing trace with hash -311630481, now seen corresponding path program 9 times [2024-06-27 20:03:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042656339] [2024-06-27 20:03:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:44,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:44,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042656339] [2024-06-27 20:03:44,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042656339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:44,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:44,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:44,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446917527] [2024-06-27 20:03:44,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:44,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:44,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:44,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:44,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 224 transitions, 2299 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 20:03:44,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:44,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:44,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:45,800 INFO L124 PetriNetUnfolderBase]: 3200/4805 cut-off events. [2024-06-27 20:03:45,801 INFO L125 PetriNetUnfolderBase]: For 470378/470378 co-relation queries the response was YES. [2024-06-27 20:03:45,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42745 conditions, 4805 events. 3200/4805 cut-off events. For 470378/470378 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 23919 event pairs, 872 based on Foata normal form. 4/4807 useless extension candidates. Maximal degree in co-relation 42660. Up to 4541 conditions per place. [2024-06-27 20:03:45,839 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 215 selfloop transitions, 27 changer transitions 0/254 dead transitions. [2024-06-27 20:03:45,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 254 transitions, 2861 flow [2024-06-27 20:03:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:03:45,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-27 20:03:45,841 INFO L175 Difference]: Start difference. First operand has 188 places, 224 transitions, 2299 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:03:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 254 transitions, 2861 flow [2024-06-27 20:03:46,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 254 transitions, 2667 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:46,215 INFO L231 Difference]: Finished difference. Result has 192 places, 224 transitions, 2167 flow [2024-06-27 20:03:46,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2167, PETRI_PLACES=192, PETRI_TRANSITIONS=224} [2024-06-27 20:03:46,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-27 20:03:46,216 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 224 transitions, 2167 flow [2024-06-27 20:03:46,216 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 20:03:46,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:46,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:46,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:03:46,217 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 20:03:46,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash -207880591, now seen corresponding path program 10 times [2024-06-27 20:03:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:46,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647310866] [2024-06-27 20:03:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:47,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:47,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647310866] [2024-06-27 20:03:47,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647310866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:47,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:47,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116315684] [2024-06-27 20:03:47,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:47,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 224 transitions, 2167 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 20:03:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:48,600 INFO L124 PetriNetUnfolderBase]: 3192/4793 cut-off events. [2024-06-27 20:03:48,600 INFO L125 PetriNetUnfolderBase]: For 477326/477326 co-relation queries the response was YES. [2024-06-27 20:03:48,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42399 conditions, 4793 events. 3192/4793 cut-off events. For 477326/477326 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 23777 event pairs, 854 based on Foata normal form. 4/4795 useless extension candidates. Maximal degree in co-relation 42312. Up to 4547 conditions per place. [2024-06-27 20:03:48,644 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 225 selfloop transitions, 19 changer transitions 0/256 dead transitions. [2024-06-27 20:03:48,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 256 transitions, 2821 flow [2024-06-27 20:03:48,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:03:48,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-27 20:03:48,645 INFO L175 Difference]: Start difference. First operand has 192 places, 224 transitions, 2167 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:03:48,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 256 transitions, 2821 flow [2024-06-27 20:03:49,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 256 transitions, 2759 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:49,064 INFO L231 Difference]: Finished difference. Result has 193 places, 226 transitions, 2246 flow [2024-06-27 20:03:49,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2105, PETRI_DIFFERENCE_MINUEND_PLACES=184, 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=2246, PETRI_PLACES=193, PETRI_TRANSITIONS=226} [2024-06-27 20:03:49,065 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 149 predicate places. [2024-06-27 20:03:49,065 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 226 transitions, 2246 flow [2024-06-27 20:03:49,065 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 20:03:49,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:49,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:49,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:03:49,066 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 20:03:49,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:49,066 INFO L85 PathProgramCache]: Analyzing trace with hash 966501020, now seen corresponding path program 1 times [2024-06-27 20:03:49,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:49,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196205131] [2024-06-27 20:03:49,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:49,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196205131] [2024-06-27 20:03:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196205131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:50,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:50,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660231577] [2024-06-27 20:03:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:50,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:50,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:50,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 226 transitions, 2246 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 20:03:50,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:50,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:50,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:51,419 INFO L124 PetriNetUnfolderBase]: 3209/4818 cut-off events. [2024-06-27 20:03:51,420 INFO L125 PetriNetUnfolderBase]: For 490855/490855 co-relation queries the response was YES. [2024-06-27 20:03:51,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42841 conditions, 4818 events. 3209/4818 cut-off events. For 490855/490855 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 23908 event pairs, 873 based on Foata normal form. 2/4818 useless extension candidates. Maximal degree in co-relation 42753. Up to 4545 conditions per place. [2024-06-27 20:03:51,465 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 219 selfloop transitions, 31 changer transitions 0/262 dead transitions. [2024-06-27 20:03:51,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 262 transitions, 2919 flow [2024-06-27 20:03:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:03:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:03:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:03:51,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-27 20:03:51,467 INFO L175 Difference]: Start difference. First operand has 193 places, 226 transitions, 2246 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:03:51,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 262 transitions, 2919 flow [2024-06-27 20:03:51,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 262 transitions, 2796 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:51,875 INFO L231 Difference]: Finished difference. Result has 195 places, 232 transitions, 2302 flow [2024-06-27 20:03:51,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2123, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2302, PETRI_PLACES=195, PETRI_TRANSITIONS=232} [2024-06-27 20:03:51,876 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 20:03:51,876 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 232 transitions, 2302 flow [2024-06-27 20:03:51,876 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 20:03:51,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:51,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:03:51,876 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:51,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:51,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1031604522, now seen corresponding path program 2 times [2024-06-27 20:03:51,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:51,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777639870] [2024-06-27 20:03:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:52,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:52,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777639870] [2024-06-27 20:03:52,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777639870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:52,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:52,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:52,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457768770] [2024-06-27 20:03:52,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:52,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:52,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:52,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:52,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:52,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 232 transitions, 2302 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:52,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:52,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:52,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:53,573 INFO L124 PetriNetUnfolderBase]: 3030/4629 cut-off events. [2024-06-27 20:03:53,573 INFO L125 PetriNetUnfolderBase]: For 503124/503136 co-relation queries the response was YES. [2024-06-27 20:03:53,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41867 conditions, 4629 events. 3030/4629 cut-off events. For 503124/503136 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 23729 event pairs, 901 based on Foata normal form. 5/4618 useless extension candidates. Maximal degree in co-relation 41778. Up to 4300 conditions per place. [2024-06-27 20:03:53,620 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 197 selfloop transitions, 14 changer transitions 0/247 dead transitions. [2024-06-27 20:03:53,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 247 transitions, 2804 flow [2024-06-27 20:03:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:03:53,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 20:03:53,621 INFO L175 Difference]: Start difference. First operand has 195 places, 232 transitions, 2302 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:03:53,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 247 transitions, 2804 flow [2024-06-27 20:03:54,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 247 transitions, 2708 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:03:54,074 INFO L231 Difference]: Finished difference. Result has 195 places, 235 transitions, 2296 flow [2024-06-27 20:03:54,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2296, PETRI_PLACES=195, PETRI_TRANSITIONS=235} [2024-06-27 20:03:54,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 151 predicate places. [2024-06-27 20:03:54,075 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 235 transitions, 2296 flow [2024-06-27 20:03:54,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:54,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:54,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:54,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:03:54,076 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:54,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1799082894, now seen corresponding path program 3 times [2024-06-27 20:03:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:54,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827319270] [2024-06-27 20:03:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:54,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:54,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:54,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827319270] [2024-06-27 20:03:54,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827319270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:54,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:54,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:54,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753061923] [2024-06-27 20:03:54,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:54,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:54,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:54,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:55,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:03:55,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 235 transitions, 2296 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:55,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:55,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:03:55,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:55,815 INFO L124 PetriNetUnfolderBase]: 3021/4617 cut-off events. [2024-06-27 20:03:55,815 INFO L125 PetriNetUnfolderBase]: For 514383/514395 co-relation queries the response was YES. [2024-06-27 20:03:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41806 conditions, 4617 events. 3021/4617 cut-off events. For 514383/514395 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23641 event pairs, 899 based on Foata normal form. 5/4606 useless extension candidates. Maximal degree in co-relation 41716. Up to 4276 conditions per place. [2024-06-27 20:03:55,863 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 194 selfloop transitions, 19 changer transitions 0/249 dead transitions. [2024-06-27 20:03:55,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 249 transitions, 2758 flow [2024-06-27 20:03:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 20:03:55,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-27 20:03:55,864 INFO L175 Difference]: Start difference. First operand has 195 places, 235 transitions, 2296 flow. Second operand 7 states and 127 transitions. [2024-06-27 20:03:55,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 249 transitions, 2758 flow [2024-06-27 20:03:56,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 249 transitions, 2666 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:56,269 INFO L231 Difference]: Finished difference. Result has 197 places, 235 transitions, 2248 flow [2024-06-27 20:03:56,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=197, PETRI_TRANSITIONS=235} [2024-06-27 20:03:56,269 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 153 predicate places. [2024-06-27 20:03:56,269 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 235 transitions, 2248 flow [2024-06-27 20:03:56,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:56,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:56,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:56,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:03:56,270 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:56,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:56,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1889170778, now seen corresponding path program 3 times [2024-06-27 20:03:56,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:56,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858221202] [2024-06-27 20:03:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:56,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:57,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:57,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858221202] [2024-06-27 20:03:57,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858221202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:57,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:57,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:57,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486834531] [2024-06-27 20:03:57,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:57,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:57,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:57,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:57,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:57,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 235 transitions, 2248 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 20:03:57,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:57,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:57,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:57,868 INFO L124 PetriNetUnfolderBase]: 3193/4798 cut-off events. [2024-06-27 20:03:57,868 INFO L125 PetriNetUnfolderBase]: For 528684/528686 co-relation queries the response was YES. [2024-06-27 20:03:57,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43375 conditions, 4798 events. 3193/4798 cut-off events. For 528684/528686 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23897 event pairs, 919 based on Foata normal form. 3/4794 useless extension candidates. Maximal degree in co-relation 43285. Up to 4665 conditions per place. [2024-06-27 20:03:57,915 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 220 selfloop transitions, 14 changer transitions 0/245 dead transitions. [2024-06-27 20:03:57,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 245 transitions, 2740 flow [2024-06-27 20:03:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:03:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:03:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:03:57,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-27 20:03:57,916 INFO L175 Difference]: Start difference. First operand has 197 places, 235 transitions, 2248 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:03:57,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 245 transitions, 2740 flow [2024-06-27 20:03:58,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 245 transitions, 2654 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-27 20:03:58,381 INFO L231 Difference]: Finished difference. Result has 198 places, 235 transitions, 2196 flow [2024-06-27 20:03:58,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2162, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2196, PETRI_PLACES=198, PETRI_TRANSITIONS=235} [2024-06-27 20:03:58,382 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 20:03:58,382 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 235 transitions, 2196 flow [2024-06-27 20:03:58,382 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 20:03:58,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:58,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:58,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:03:58,382 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:03:58,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:58,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1321816118, now seen corresponding path program 1 times [2024-06-27 20:03:58,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:58,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692341129] [2024-06-27 20:03:58,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:58,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:59,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692341129] [2024-06-27 20:03:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692341129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:59,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:59,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:03:59,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883398577] [2024-06-27 20:03:59,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:59,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:03:59,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:03:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:03:59,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:03:59,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 235 transitions, 2196 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 20:03:59,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:59,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:03:59,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:00,188 INFO L124 PetriNetUnfolderBase]: 3210/4824 cut-off events. [2024-06-27 20:04:00,189 INFO L125 PetriNetUnfolderBase]: For 541900/541905 co-relation queries the response was YES. [2024-06-27 20:04:00,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43055 conditions, 4824 events. 3210/4824 cut-off events. For 541900/541905 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 24043 event pairs, 923 based on Foata normal form. 2/4819 useless extension candidates. Maximal degree in co-relation 42964. Up to 4583 conditions per place. [2024-06-27 20:04:00,230 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 16 changer transitions 0/255 dead transitions. [2024-06-27 20:04:00,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 255 transitions, 2746 flow [2024-06-27 20:04:00,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:04:00,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 20:04:00,232 INFO L175 Difference]: Start difference. First operand has 198 places, 235 transitions, 2196 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:04:00,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 255 transitions, 2746 flow [2024-06-27 20:04:00,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 255 transitions, 2692 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:00,653 INFO L231 Difference]: Finished difference. Result has 198 places, 238 transitions, 2239 flow [2024-06-27 20:04:00,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2239, PETRI_PLACES=198, PETRI_TRANSITIONS=238} [2024-06-27 20:04:00,653 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 154 predicate places. [2024-06-27 20:04:00,653 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 238 transitions, 2239 flow [2024-06-27 20:04:00,654 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 20:04:00,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:00,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:00,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:04:00,654 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:00,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash -2066055848, now seen corresponding path program 1 times [2024-06-27 20:04:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833572160] [2024-06-27 20:04:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:01,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:01,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833572160] [2024-06-27 20:04:01,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833572160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:01,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:01,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:01,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57585806] [2024-06-27 20:04:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:01,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:01,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:01,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 238 transitions, 2239 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 20:04:01,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:01,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:01,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:02,395 INFO L124 PetriNetUnfolderBase]: 3225/4845 cut-off events. [2024-06-27 20:04:02,395 INFO L125 PetriNetUnfolderBase]: For 560261/560266 co-relation queries the response was YES. [2024-06-27 20:04:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43877 conditions, 4845 events. 3225/4845 cut-off events. For 560261/560266 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24131 event pairs, 921 based on Foata normal form. 3/4841 useless extension candidates. Maximal degree in co-relation 43785. Up to 4583 conditions per place. [2024-06-27 20:04:02,444 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 210 selfloop transitions, 25 changer transitions 0/263 dead transitions. [2024-06-27 20:04:02,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 263 transitions, 2945 flow [2024-06-27 20:04:02,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:04:02,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:04:02,445 INFO L175 Difference]: Start difference. First operand has 198 places, 238 transitions, 2239 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:04:02,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 263 transitions, 2945 flow [2024-06-27 20:04:02,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 263 transitions, 2872 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:02,986 INFO L231 Difference]: Finished difference. Result has 200 places, 244 transitions, 2300 flow [2024-06-27 20:04:02,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2300, PETRI_PLACES=200, PETRI_TRANSITIONS=244} [2024-06-27 20:04:02,986 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-27 20:04:02,986 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 244 transitions, 2300 flow [2024-06-27 20:04:02,987 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 20:04:02,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:02,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:04:02,987 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:02,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -2066056034, now seen corresponding path program 2 times [2024-06-27 20:04:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:02,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120607489] [2024-06-27 20:04:02,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:02,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120607489] [2024-06-27 20:04:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120607489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:03,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:03,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792025012] [2024-06-27 20:04:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:03,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:03,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:03,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 244 transitions, 2300 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 20:04:03,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:03,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:03,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:04,732 INFO L124 PetriNetUnfolderBase]: 3235/4859 cut-off events. [2024-06-27 20:04:04,733 INFO L125 PetriNetUnfolderBase]: For 577450/577455 co-relation queries the response was YES. [2024-06-27 20:04:04,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44713 conditions, 4859 events. 3235/4859 cut-off events. For 577450/577455 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 24254 event pairs, 911 based on Foata normal form. 2/4854 useless extension candidates. Maximal degree in co-relation 44620. Up to 4594 conditions per place. [2024-06-27 20:04:04,783 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 28 changer transitions 0/267 dead transitions. [2024-06-27 20:04:04,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 267 transitions, 3062 flow [2024-06-27 20:04:04,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:04,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:04:04,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:04:04,784 INFO L175 Difference]: Start difference. First operand has 200 places, 244 transitions, 2300 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:04:04,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 267 transitions, 3062 flow [2024-06-27 20:04:05,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 267 transitions, 3004 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:05,241 INFO L231 Difference]: Finished difference. Result has 204 places, 250 transitions, 2430 flow [2024-06-27 20:04:05,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=204, PETRI_TRANSITIONS=250} [2024-06-27 20:04:05,242 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-27 20:04:05,242 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 250 transitions, 2430 flow [2024-06-27 20:04:05,242 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 20:04:05,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:05,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:05,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:04:05,242 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:05,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:05,243 INFO L85 PathProgramCache]: Analyzing trace with hash -560838212, now seen corresponding path program 3 times [2024-06-27 20:04:05,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:05,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582983880] [2024-06-27 20:04:05,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:05,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:05,941 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 20:04:05,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:05,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582983880] [2024-06-27 20:04:05,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582983880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:05,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:05,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:05,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310203672] [2024-06-27 20:04:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:05,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:05,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:05,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:06,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:06,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 250 transitions, 2430 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 20:04:06,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:06,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:06,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:07,008 INFO L124 PetriNetUnfolderBase]: 3229/4853 cut-off events. [2024-06-27 20:04:07,008 INFO L125 PetriNetUnfolderBase]: For 593716/593723 co-relation queries the response was YES. [2024-06-27 20:04:07,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45167 conditions, 4853 events. 3229/4853 cut-off events. For 593716/593723 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 24199 event pairs, 922 based on Foata normal form. 2/4848 useless extension candidates. Maximal degree in co-relation 45072. Up to 4589 conditions per place. [2024-06-27 20:04:07,063 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 206 selfloop transitions, 28 changer transitions 0/262 dead transitions. [2024-06-27 20:04:07,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 262 transitions, 2930 flow [2024-06-27 20:04:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:04:07,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-27 20:04:07,064 INFO L175 Difference]: Start difference. First operand has 204 places, 250 transitions, 2430 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:04:07,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 262 transitions, 2930 flow [2024-06-27 20:04:07,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 262 transitions, 2825 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-27 20:04:07,731 INFO L231 Difference]: Finished difference. Result has 208 places, 250 transitions, 2387 flow [2024-06-27 20:04:07,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2387, PETRI_PLACES=208, PETRI_TRANSITIONS=250} [2024-06-27 20:04:07,732 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 164 predicate places. [2024-06-27 20:04:07,732 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 250 transitions, 2387 flow [2024-06-27 20:04:07,732 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 20:04:07,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:07,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:07,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:04:07,732 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:07,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1888687178, now seen corresponding path program 2 times [2024-06-27 20:04:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:07,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336890627] [2024-06-27 20:04:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:08,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:08,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336890627] [2024-06-27 20:04:08,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336890627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:08,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:08,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:08,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11412947] [2024-06-27 20:04:08,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:08,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:08,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:08,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:08,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:08,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:08,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 250 transitions, 2387 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 20:04:08,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:08,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:08,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:09,459 INFO L124 PetriNetUnfolderBase]: 3244/4873 cut-off events. [2024-06-27 20:04:09,459 INFO L125 PetriNetUnfolderBase]: For 612491/612498 co-relation queries the response was YES. [2024-06-27 20:04:09,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45526 conditions, 4873 events. 3244/4873 cut-off events. For 612491/612498 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 24381 event pairs, 910 based on Foata normal form. 5/4871 useless extension candidates. Maximal degree in co-relation 45429. Up to 4603 conditions per place. [2024-06-27 20:04:09,512 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 211 selfloop transitions, 29 changer transitions 0/268 dead transitions. [2024-06-27 20:04:09,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 268 transitions, 3057 flow [2024-06-27 20:04:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:04:09,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-27 20:04:09,514 INFO L175 Difference]: Start difference. First operand has 208 places, 250 transitions, 2387 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:04:09,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 268 transitions, 3057 flow [2024-06-27 20:04:09,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 268 transitions, 2971 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:09,957 INFO L231 Difference]: Finished difference. Result has 209 places, 253 transitions, 2396 flow [2024-06-27 20:04:09,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2396, PETRI_PLACES=209, PETRI_TRANSITIONS=253} [2024-06-27 20:04:09,958 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 165 predicate places. [2024-06-27 20:04:09,958 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 253 transitions, 2396 flow [2024-06-27 20:04:09,958 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 20:04:09,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:09,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:09,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:04:09,959 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:09,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:09,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1031833736, now seen corresponding path program 3 times [2024-06-27 20:04:09,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:09,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868551213] [2024-06-27 20:04:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:09,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:10,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:10,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868551213] [2024-06-27 20:04:10,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868551213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:10,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:10,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:10,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524005988] [2024-06-27 20:04:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:10,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:10,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:10,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:10,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 253 transitions, 2396 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 20:04:10,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:10,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:10,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:11,792 INFO L124 PetriNetUnfolderBase]: 3235/4861 cut-off events. [2024-06-27 20:04:11,792 INFO L125 PetriNetUnfolderBase]: For 624572/624579 co-relation queries the response was YES. [2024-06-27 20:04:11,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45573 conditions, 4861 events. 3235/4861 cut-off events. For 624572/624579 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 24315 event pairs, 908 based on Foata normal form. 5/4859 useless extension candidates. Maximal degree in co-relation 45475. Up to 4596 conditions per place. [2024-06-27 20:04:11,840 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 213 selfloop transitions, 28 changer transitions 0/269 dead transitions. [2024-06-27 20:04:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 269 transitions, 2920 flow [2024-06-27 20:04:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:04:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 20:04:11,841 INFO L175 Difference]: Start difference. First operand has 209 places, 253 transitions, 2396 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:04:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 269 transitions, 2920 flow [2024-06-27 20:04:12,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 269 transitions, 2845 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:12,308 INFO L231 Difference]: Finished difference. Result has 212 places, 253 transitions, 2383 flow [2024-06-27 20:04:12,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2383, PETRI_PLACES=212, PETRI_TRANSITIONS=253} [2024-06-27 20:04:12,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-27 20:04:12,309 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 253 transitions, 2383 flow [2024-06-27 20:04:12,309 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 20:04:12,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:12,309 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 20:04:12,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:04:12,309 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:12,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:12,310 INFO L85 PathProgramCache]: Analyzing trace with hash 473874148, now seen corresponding path program 1 times [2024-06-27 20:04:12,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:12,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255825693] [2024-06-27 20:04:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:12,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255825693] [2024-06-27 20:04:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255825693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:14,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:14,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:14,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243045357] [2024-06-27 20:04:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:14,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:14,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:14,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 253 transitions, 2383 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:14,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:14,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:14,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:15,679 INFO L124 PetriNetUnfolderBase]: 3279/5014 cut-off events. [2024-06-27 20:04:15,679 INFO L125 PetriNetUnfolderBase]: For 696546/696546 co-relation queries the response was YES. [2024-06-27 20:04:15,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48196 conditions, 5014 events. 3279/5014 cut-off events. For 696546/696546 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 26684 event pairs, 737 based on Foata normal form. 16/5000 useless extension candidates. Maximal degree in co-relation 48097. Up to 4299 conditions per place. [2024-06-27 20:04:15,731 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 263 selfloop transitions, 32 changer transitions 0/322 dead transitions. [2024-06-27 20:04:15,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 322 transitions, 3569 flow [2024-06-27 20:04:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:04:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:04:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-27 20:04:15,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-27 20:04:15,733 INFO L175 Difference]: Start difference. First operand has 212 places, 253 transitions, 2383 flow. Second operand 12 states and 242 transitions. [2024-06-27 20:04:15,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 322 transitions, 3569 flow [2024-06-27 20:04:16,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 322 transitions, 3488 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:16,222 INFO L231 Difference]: Finished difference. Result has 217 places, 255 transitions, 2510 flow [2024-06-27 20:04:16,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2302, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2510, PETRI_PLACES=217, PETRI_TRANSITIONS=255} [2024-06-27 20:04:16,222 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 173 predicate places. [2024-06-27 20:04:16,223 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 255 transitions, 2510 flow [2024-06-27 20:04:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:16,223 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 20:04:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:04:16,223 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 20:04:16,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash 473934598, now seen corresponding path program 2 times [2024-06-27 20:04:16,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:16,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199318052] [2024-06-27 20:04:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:18,031 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 20:04:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199318052] [2024-06-27 20:04:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199318052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:18,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:18,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:18,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347893745] [2024-06-27 20:04:18,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:18,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:18,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:18,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:18,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:18,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 255 transitions, 2510 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:18,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:18,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:18,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:19,690 INFO L124 PetriNetUnfolderBase]: 3348/5133 cut-off events. [2024-06-27 20:04:19,690 INFO L125 PetriNetUnfolderBase]: For 733054/733054 co-relation queries the response was YES. [2024-06-27 20:04:19,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49898 conditions, 5133 events. 3348/5133 cut-off events. For 733054/733054 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 27624 event pairs, 876 based on Foata normal form. 20/5123 useless extension candidates. Maximal degree in co-relation 49798. Up to 4591 conditions per place. [2024-06-27 20:04:19,750 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 261 selfloop transitions, 30 changer transitions 0/318 dead transitions. [2024-06-27 20:04:19,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 318 transitions, 3366 flow [2024-06-27 20:04:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:04:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:04:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 238 transitions. [2024-06-27 20:04:19,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-27 20:04:19,752 INFO L175 Difference]: Start difference. First operand has 217 places, 255 transitions, 2510 flow. Second operand 12 states and 238 transitions. [2024-06-27 20:04:19,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 318 transitions, 3366 flow [2024-06-27 20:04:20,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 3286 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:20,373 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2569 flow [2024-06-27 20:04:20,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2569, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-27 20:04:20,374 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-27 20:04:20,374 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2569 flow [2024-06-27 20:04:20,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:20,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:20,374 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 20:04:20,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:04:20,375 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 20:04:20,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:20,375 INFO L85 PathProgramCache]: Analyzing trace with hash 765535002, now seen corresponding path program 3 times [2024-06-27 20:04:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:20,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351355969] [2024-06-27 20:04:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:20,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:22,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:22,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351355969] [2024-06-27 20:04:22,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351355969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:22,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:22,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803966361] [2024-06-27 20:04:22,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:22,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:22,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:22,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2569 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:22,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:22,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:22,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:23,600 INFO L124 PetriNetUnfolderBase]: 3306/5071 cut-off events. [2024-06-27 20:04:23,601 INFO L125 PetriNetUnfolderBase]: For 720253/720253 co-relation queries the response was YES. [2024-06-27 20:04:23,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48330 conditions, 5071 events. 3306/5071 cut-off events. For 720253/720253 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 27268 event pairs, 850 based on Foata normal form. 20/5061 useless extension candidates. Maximal degree in co-relation 48228. Up to 4557 conditions per place. [2024-06-27 20:04:23,659 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 259 selfloop transitions, 24 changer transitions 0/310 dead transitions. [2024-06-27 20:04:23,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 310 transitions, 3317 flow [2024-06-27 20:04:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:04:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:04:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:04:23,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:04:23,660 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2569 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:04:23,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 310 transitions, 3317 flow [2024-06-27 20:04:24,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 310 transitions, 3190 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-27 20:04:24,365 INFO L231 Difference]: Finished difference. Result has 222 places, 256 transitions, 2497 flow [2024-06-27 20:04:24,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2442, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2497, PETRI_PLACES=222, PETRI_TRANSITIONS=256} [2024-06-27 20:04:24,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 178 predicate places. [2024-06-27 20:04:24,366 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 256 transitions, 2497 flow [2024-06-27 20:04:24,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:24,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:24,367 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 20:04:24,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:04:24,367 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 20:04:24,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash 591612330, now seen corresponding path program 1 times [2024-06-27 20:04:24,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:24,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578235343] [2024-06-27 20:04:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:24,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578235343] [2024-06-27 20:04:26,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578235343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:26,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:26,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958238384] [2024-06-27 20:04:26,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:26,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:26,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:26,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 256 transitions, 2497 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 20:04:26,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:26,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:26,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:27,351 INFO L124 PetriNetUnfolderBase]: 3552/5364 cut-off events. [2024-06-27 20:04:27,351 INFO L125 PetriNetUnfolderBase]: For 738370/738372 co-relation queries the response was YES. [2024-06-27 20:04:27,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50968 conditions, 5364 events. 3552/5364 cut-off events. For 738370/738372 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 27751 event pairs, 796 based on Foata normal form. 6/5367 useless extension candidates. Maximal degree in co-relation 50865. Up to 4718 conditions per place. [2024-06-27 20:04:27,409 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 219 selfloop transitions, 73 changer transitions 0/307 dead transitions. [2024-06-27 20:04:27,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 307 transitions, 3323 flow [2024-06-27 20:04:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:04:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:04:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:04:27,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:04:27,410 INFO L175 Difference]: Start difference. First operand has 222 places, 256 transitions, 2497 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:04:27,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 307 transitions, 3323 flow [2024-06-27 20:04:28,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 307 transitions, 3265 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 20:04:28,164 INFO L231 Difference]: Finished difference. Result has 223 places, 261 transitions, 2708 flow [2024-06-27 20:04:28,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2708, PETRI_PLACES=223, PETRI_TRANSITIONS=261} [2024-06-27 20:04:28,164 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 179 predicate places. [2024-06-27 20:04:28,164 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 261 transitions, 2708 flow [2024-06-27 20:04:28,164 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 20:04:28,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:28,165 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 20:04:28,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:04:28,165 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 20:04:28,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 880231526, now seen corresponding path program 4 times [2024-06-27 20:04:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12712116] [2024-06-27 20:04:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:29,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12712116] [2024-06-27 20:04:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12712116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654272467] [2024-06-27 20:04:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:30,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:30,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 261 transitions, 2708 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:30,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:30,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:30,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:31,382 INFO L124 PetriNetUnfolderBase]: 3381/5209 cut-off events. [2024-06-27 20:04:31,382 INFO L125 PetriNetUnfolderBase]: For 778650/778660 co-relation queries the response was YES. [2024-06-27 20:04:31,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50464 conditions, 5209 events. 3381/5209 cut-off events. For 778650/778660 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28354 event pairs, 699 based on Foata normal form. 20/5197 useless extension candidates. Maximal degree in co-relation 50359. Up to 4174 conditions per place. [2024-06-27 20:04:31,439 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 191 selfloop transitions, 100 changer transitions 0/319 dead transitions. [2024-06-27 20:04:31,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 319 transitions, 3788 flow [2024-06-27 20:04:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:04:31,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:04:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-27 20:04:31,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47780126849894294 [2024-06-27 20:04:31,440 INFO L175 Difference]: Start difference. First operand has 223 places, 261 transitions, 2708 flow. Second operand 11 states and 226 transitions. [2024-06-27 20:04:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 319 transitions, 3788 flow [2024-06-27 20:04:32,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 319 transitions, 3561 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-27 20:04:32,084 INFO L231 Difference]: Finished difference. Result has 227 places, 262 transitions, 2762 flow [2024-06-27 20:04:32,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2762, PETRI_PLACES=227, PETRI_TRANSITIONS=262} [2024-06-27 20:04:32,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-27 20:04:32,085 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 262 transitions, 2762 flow [2024-06-27 20:04:32,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:32,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:32,085 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 20:04:32,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:04:32,086 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:32,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:32,086 INFO L85 PathProgramCache]: Analyzing trace with hash -321120891, now seen corresponding path program 1 times [2024-06-27 20:04:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:32,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311610386] [2024-06-27 20:04:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:32,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311610386] [2024-06-27 20:04:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311610386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:33,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429172945] [2024-06-27 20:04:33,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:33,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:33,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:33,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 262 transitions, 2762 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 20:04:33,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:33,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:33,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:34,130 INFO L124 PetriNetUnfolderBase]: 3615/5489 cut-off events. [2024-06-27 20:04:34,130 INFO L125 PetriNetUnfolderBase]: For 790470/790470 co-relation queries the response was YES. [2024-06-27 20:04:34,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53468 conditions, 5489 events. 3615/5489 cut-off events. For 790470/790470 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 28797 event pairs, 985 based on Foata normal form. 2/5491 useless extension candidates. Maximal degree in co-relation 53362. Up to 5269 conditions per place. [2024-06-27 20:04:34,193 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 248 selfloop transitions, 37 changer transitions 0/298 dead transitions. [2024-06-27 20:04:34,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 298 transitions, 3640 flow [2024-06-27 20:04:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:04:34,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:04:34,195 INFO L175 Difference]: Start difference. First operand has 227 places, 262 transitions, 2762 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:04:34,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 298 transitions, 3640 flow [2024-06-27 20:04:34,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 298 transitions, 3401 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-27 20:04:34,951 INFO L231 Difference]: Finished difference. Result has 226 places, 268 transitions, 2706 flow [2024-06-27 20:04:34,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2523, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2706, PETRI_PLACES=226, PETRI_TRANSITIONS=268} [2024-06-27 20:04:34,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 182 predicate places. [2024-06-27 20:04:34,952 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 268 transitions, 2706 flow [2024-06-27 20:04:34,952 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 20:04:34,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:34,952 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 20:04:34,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:04:34,952 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 20:04:34,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1053136754, now seen corresponding path program 2 times [2024-06-27 20:04:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:34,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753163429] [2024-06-27 20:04:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:36,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:36,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753163429] [2024-06-27 20:04:36,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753163429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:36,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:36,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:36,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270666813] [2024-06-27 20:04:36,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:36,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:36,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:36,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:36,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:36,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 268 transitions, 2706 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 20:04:36,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:36,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:36,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:37,988 INFO L124 PetriNetUnfolderBase]: 3702/5598 cut-off events. [2024-06-27 20:04:37,989 INFO L125 PetriNetUnfolderBase]: For 809145/809147 co-relation queries the response was YES. [2024-06-27 20:04:38,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53947 conditions, 5598 events. 3702/5598 cut-off events. For 809145/809147 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 29234 event pairs, 842 based on Foata normal form. 6/5604 useless extension candidates. Maximal degree in co-relation 53840. Up to 4935 conditions per place. [2024-06-27 20:04:38,054 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 230 selfloop transitions, 72 changer transitions 0/319 dead transitions. [2024-06-27 20:04:38,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 319 transitions, 3581 flow [2024-06-27 20:04:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:04:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:04:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:04:38,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 20:04:38,055 INFO L175 Difference]: Start difference. First operand has 226 places, 268 transitions, 2706 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:04:38,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 319 transitions, 3581 flow [2024-06-27 20:04:38,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 319 transitions, 3493 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:38,870 INFO L231 Difference]: Finished difference. Result has 233 places, 276 transitions, 2926 flow [2024-06-27 20:04:38,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2926, PETRI_PLACES=233, PETRI_TRANSITIONS=276} [2024-06-27 20:04:38,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 189 predicate places. [2024-06-27 20:04:38,870 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 276 transitions, 2926 flow [2024-06-27 20:04:38,871 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 20:04:38,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:38,871 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 20:04:38,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:04:38,871 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 20:04:38,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1053145124, now seen corresponding path program 3 times [2024-06-27 20:04:38,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:38,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60737656] [2024-06-27 20:04:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:40,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60737656] [2024-06-27 20:04:40,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60737656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:40,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:40,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:40,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391676295] [2024-06-27 20:04:40,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:40,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:40,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:40,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:40,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 276 transitions, 2926 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 20:04:40,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:40,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:40,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:41,841 INFO L124 PetriNetUnfolderBase]: 3751/5671 cut-off events. [2024-06-27 20:04:41,842 INFO L125 PetriNetUnfolderBase]: For 852121/852123 co-relation queries the response was YES. [2024-06-27 20:04:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55973 conditions, 5671 events. 3751/5671 cut-off events. For 852121/852123 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 29749 event pairs, 810 based on Foata normal form. 6/5669 useless extension candidates. Maximal degree in co-relation 55863. Up to 4929 conditions per place. [2024-06-27 20:04:41,910 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 229 selfloop transitions, 79 changer transitions 0/325 dead transitions. [2024-06-27 20:04:41,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 325 transitions, 4090 flow [2024-06-27 20:04:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:04:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:04:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:04:41,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:04:41,912 INFO L175 Difference]: Start difference. First operand has 233 places, 276 transitions, 2926 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:04:41,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 325 transitions, 4090 flow [2024-06-27 20:04:42,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 325 transitions, 3877 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:42,773 INFO L231 Difference]: Finished difference. Result has 238 places, 280 transitions, 3058 flow [2024-06-27 20:04:42,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3058, PETRI_PLACES=238, PETRI_TRANSITIONS=280} [2024-06-27 20:04:42,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 194 predicate places. [2024-06-27 20:04:42,774 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 280 transitions, 3058 flow [2024-06-27 20:04:42,774 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 20:04:42,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:42,774 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 20:04:42,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:04:42,774 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 20:04:42,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1046650004, now seen corresponding path program 4 times [2024-06-27 20:04:42,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:42,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669342827] [2024-06-27 20:04:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:42,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:44,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:44,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:44,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669342827] [2024-06-27 20:04:44,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669342827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:44,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:44,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:44,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875790291] [2024-06-27 20:04:44,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:44,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:44,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:44,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:44,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:44,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:44,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 280 transitions, 3058 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 20:04:44,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:44,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:44,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:45,773 INFO L124 PetriNetUnfolderBase]: 3736/5652 cut-off events. [2024-06-27 20:04:45,773 INFO L125 PetriNetUnfolderBase]: For 857184/857186 co-relation queries the response was YES. [2024-06-27 20:04:45,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55322 conditions, 5652 events. 3736/5652 cut-off events. For 857184/857186 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 29695 event pairs, 842 based on Foata normal form. 6/5658 useless extension candidates. Maximal degree in co-relation 55211. Up to 4989 conditions per place. [2024-06-27 20:04:45,844 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 236 selfloop transitions, 71 changer transitions 0/324 dead transitions. [2024-06-27 20:04:45,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 324 transitions, 3804 flow [2024-06-27 20:04:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:04:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:04:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:04:45,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-27 20:04:45,846 INFO L175 Difference]: Start difference. First operand has 238 places, 280 transitions, 3058 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:04:45,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 324 transitions, 3804 flow [2024-06-27 20:04:46,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 3566 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-27 20:04:46,653 INFO L231 Difference]: Finished difference. Result has 242 places, 280 transitions, 2969 flow [2024-06-27 20:04:46,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2820, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2969, PETRI_PLACES=242, PETRI_TRANSITIONS=280} [2024-06-27 20:04:46,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 20:04:46,654 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 280 transitions, 2969 flow [2024-06-27 20:04:46,654 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 20:04:46,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:46,654 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 20:04:46,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:04:46,654 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 20:04:46,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1046465306, now seen corresponding path program 5 times [2024-06-27 20:04:46,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:46,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106400167] [2024-06-27 20:04:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:46,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:48,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:48,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106400167] [2024-06-27 20:04:48,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106400167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:48,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:48,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:04:48,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387171418] [2024-06-27 20:04:48,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:48,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:04:48,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:48,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:04:48,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:04:48,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:04:48,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 280 transitions, 2969 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:48,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:48,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:04:48,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:49,655 INFO L124 PetriNetUnfolderBase]: 3580/5527 cut-off events. [2024-06-27 20:04:49,655 INFO L125 PetriNetUnfolderBase]: For 900778/900778 co-relation queries the response was YES. [2024-06-27 20:04:49,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54380 conditions, 5527 events. 3580/5527 cut-off events. For 900778/900778 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 30428 event pairs, 709 based on Foata normal form. 24/5525 useless extension candidates. Maximal degree in co-relation 54267. Up to 4425 conditions per place. [2024-06-27 20:04:49,725 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 208 selfloop transitions, 96 changer transitions 0/335 dead transitions. [2024-06-27 20:04:49,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 335 transitions, 4091 flow [2024-06-27 20:04:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:04:49,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:04:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-27 20:04:49,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47357293868921774 [2024-06-27 20:04:49,726 INFO L175 Difference]: Start difference. First operand has 242 places, 280 transitions, 2969 flow. Second operand 11 states and 224 transitions. [2024-06-27 20:04:49,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 335 transitions, 4091 flow [2024-06-27 20:04:50,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 335 transitions, 3908 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-27 20:04:50,367 INFO L231 Difference]: Finished difference. Result has 242 places, 281 transitions, 3065 flow [2024-06-27 20:04:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3065, PETRI_PLACES=242, PETRI_TRANSITIONS=281} [2024-06-27 20:04:50,367 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 20:04:50,368 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 281 transitions, 3065 flow [2024-06-27 20:04:50,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:04:50,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:50,368 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 20:04:50,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:04:50,368 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:50,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1136777648, now seen corresponding path program 1 times [2024-06-27 20:04:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90844001] [2024-06-27 20:04:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:50,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90844001] [2024-06-27 20:04:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90844001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801292555] [2024-06-27 20:04:51,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:51,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:51,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 281 transitions, 3065 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 20:04:51,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:51,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:52,581 INFO L124 PetriNetUnfolderBase]: 3793/5774 cut-off events. [2024-06-27 20:04:52,581 INFO L125 PetriNetUnfolderBase]: For 916459/916464 co-relation queries the response was YES. [2024-06-27 20:04:52,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57529 conditions, 5774 events. 3793/5774 cut-off events. For 916459/916464 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30862 event pairs, 1000 based on Foata normal form. 3/5770 useless extension candidates. Maximal degree in co-relation 57417. Up to 5486 conditions per place. [2024-06-27 20:04:52,653 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 259 selfloop transitions, 40 changer transitions 0/317 dead transitions. [2024-06-27 20:04:52,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 317 transitions, 4011 flow [2024-06-27 20:04:52,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:04:52,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:04:52,654 INFO L175 Difference]: Start difference. First operand has 242 places, 281 transitions, 3065 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:04:52,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 317 transitions, 4011 flow [2024-06-27 20:04:53,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 317 transitions, 3819 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 20:04:53,669 INFO L231 Difference]: Finished difference. Result has 242 places, 287 transitions, 3089 flow [2024-06-27 20:04:53,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3089, PETRI_PLACES=242, PETRI_TRANSITIONS=287} [2024-06-27 20:04:53,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-27 20:04:53,669 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 287 transitions, 3089 flow [2024-06-27 20:04:53,670 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 20:04:53,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:53,670 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 20:04:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:04:53,670 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:53,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -320792601, now seen corresponding path program 2 times [2024-06-27 20:04:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:53,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532743541] [2024-06-27 20:04:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:53,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:54,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:54,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532743541] [2024-06-27 20:04:54,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532743541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:54,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:54,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:04:54,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142583693] [2024-06-27 20:04:54,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:04:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:04:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:04:54,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:54,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 287 transitions, 3089 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 20:04:54,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:54,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:55,840 INFO L124 PetriNetUnfolderBase]: 3798/5783 cut-off events. [2024-06-27 20:04:55,840 INFO L125 PetriNetUnfolderBase]: For 923144/923149 co-relation queries the response was YES. [2024-06-27 20:04:55,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57374 conditions, 5783 events. 3798/5783 cut-off events. For 923144/923149 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 30900 event pairs, 999 based on Foata normal form. 2/5778 useless extension candidates. Maximal degree in co-relation 57261. Up to 5535 conditions per place. [2024-06-27 20:04:55,911 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 258 selfloop transitions, 38 changer transitions 0/314 dead transitions. [2024-06-27 20:04:55,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 314 transitions, 3929 flow [2024-06-27 20:04:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:04:55,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:04:55,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:04:55,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-27 20:04:55,912 INFO L175 Difference]: Start difference. First operand has 242 places, 287 transitions, 3089 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:04:55,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 314 transitions, 3929 flow [2024-06-27 20:04:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 314 transitions, 3831 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-27 20:04:56,976 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3113 flow [2024-06-27 20:04:56,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2991, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3113, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-27 20:04:56,977 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-27 20:04:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3113 flow [2024-06-27 20:04:56,977 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 20:04:56,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:56,977 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 20:04:56,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:04:56,978 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash -315401019, now seen corresponding path program 1 times [2024-06-27 20:04:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:56,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406063014] [2024-06-27 20:04:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:04:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:04:57,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:04:57,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406063014] [2024-06-27 20:04:57,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406063014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:04:57,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:04:57,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:04:57,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397337993] [2024-06-27 20:04:57,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:04:57,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:04:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:04:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:04:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:04:57,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:04:57,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3113 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 20:04:57,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:04:57,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:04:57,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:59,006 INFO L124 PetriNetUnfolderBase]: 3837/5823 cut-off events. [2024-06-27 20:04:59,006 INFO L125 PetriNetUnfolderBase]: For 941405/941412 co-relation queries the response was YES. [2024-06-27 20:04:59,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57693 conditions, 5823 events. 3837/5823 cut-off events. For 941405/941412 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 30994 event pairs, 999 based on Foata normal form. 3/5812 useless extension candidates. Maximal degree in co-relation 57578. Up to 5515 conditions per place. [2024-06-27 20:04:59,071 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 255 selfloop transitions, 35 changer transitions 0/320 dead transitions. [2024-06-27 20:04:59,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 320 transitions, 4201 flow [2024-06-27 20:04:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:04:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:04:59,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 20:04:59,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-27 20:04:59,072 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3113 flow. Second operand 7 states and 131 transitions. [2024-06-27 20:04:59,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 320 transitions, 4201 flow [2024-06-27 20:04:59,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 320 transitions, 4118 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:04:59,973 INFO L231 Difference]: Finished difference. Result has 248 places, 299 transitions, 3268 flow [2024-06-27 20:04:59,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=248, PETRI_TRANSITIONS=299} [2024-06-27 20:04:59,974 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 204 predicate places. [2024-06-27 20:04:59,974 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 299 transitions, 3268 flow [2024-06-27 20:04:59,974 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 20:04:59,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:04:59,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:04:59,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:04:59,974 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:04:59,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:04:59,975 INFO L85 PathProgramCache]: Analyzing trace with hash -309687099, now seen corresponding path program 2 times [2024-06-27 20:04:59,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:04:59,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316303920] [2024-06-27 20:04:59,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:04:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:04:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:00,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:00,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316303920] [2024-06-27 20:05:00,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316303920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:00,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:00,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:00,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757674152] [2024-06-27 20:05:00,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:00,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:00,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:00,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:00,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:00,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 299 transitions, 3268 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 20:05:00,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:00,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:00,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:01,973 INFO L124 PetriNetUnfolderBase]: 3866/5857 cut-off events. [2024-06-27 20:05:01,973 INFO L125 PetriNetUnfolderBase]: For 970109/970121 co-relation queries the response was YES. [2024-06-27 20:05:02,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5857 events. 3866/5857 cut-off events. For 970109/970121 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 31153 event pairs, 1003 based on Foata normal form. 3/5839 useless extension candidates. Maximal degree in co-relation 58687. Up to 5542 conditions per place. [2024-06-27 20:05:02,046 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 252 selfloop transitions, 41 changer transitions 0/323 dead transitions. [2024-06-27 20:05:02,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 323 transitions, 4318 flow [2024-06-27 20:05:02,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-27 20:05:02,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42524916943521596 [2024-06-27 20:05:02,048 INFO L175 Difference]: Start difference. First operand has 248 places, 299 transitions, 3268 flow. Second operand 7 states and 128 transitions. [2024-06-27 20:05:02,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 323 transitions, 4318 flow [2024-06-27 20:05:03,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 323 transitions, 4172 flow, removed 66 selfloop flow, removed 2 redundant places. [2024-06-27 20:05:03,008 INFO L231 Difference]: Finished difference. Result has 253 places, 305 transitions, 3326 flow [2024-06-27 20:05:03,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3164, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3326, PETRI_PLACES=253, PETRI_TRANSITIONS=305} [2024-06-27 20:05:03,009 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 209 predicate places. [2024-06-27 20:05:03,009 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 305 transitions, 3326 flow [2024-06-27 20:05:03,009 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 20:05:03,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:03,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:03,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:05:03,009 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:03,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:03,010 INFO L85 PathProgramCache]: Analyzing trace with hash -688034140, now seen corresponding path program 5 times [2024-06-27 20:05:03,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:03,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702700170] [2024-06-27 20:05:03,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:03,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:04,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:04,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702700170] [2024-06-27 20:05:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702700170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:04,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:04,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324514563] [2024-06-27 20:05:04,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:04,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:04,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:04,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:04,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 305 transitions, 3326 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 20:05:04,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:04,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:04,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:06,162 INFO L124 PetriNetUnfolderBase]: 3954/5986 cut-off events. [2024-06-27 20:05:06,162 INFO L125 PetriNetUnfolderBase]: For 1006884/1006886 co-relation queries the response was YES. [2024-06-27 20:05:06,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59997 conditions, 5986 events. 3954/5986 cut-off events. For 1006884/1006886 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 31831 event pairs, 854 based on Foata normal form. 6/5992 useless extension candidates. Maximal degree in co-relation 59879. Up to 5285 conditions per place. [2024-06-27 20:05:06,229 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 258 selfloop transitions, 74 changer transitions 0/355 dead transitions. [2024-06-27 20:05:06,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 355 transitions, 4282 flow [2024-06-27 20:05:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:05:06,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-27 20:05:06,231 INFO L175 Difference]: Start difference. First operand has 253 places, 305 transitions, 3326 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:05:06,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 355 transitions, 4282 flow [2024-06-27 20:05:07,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 355 transitions, 4213 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 20:05:07,302 INFO L231 Difference]: Finished difference. Result has 261 places, 314 transitions, 3596 flow [2024-06-27 20:05:07,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3596, PETRI_PLACES=261, PETRI_TRANSITIONS=314} [2024-06-27 20:05:07,302 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 217 predicate places. [2024-06-27 20:05:07,302 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 314 transitions, 3596 flow [2024-06-27 20:05:07,302 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 20:05:07,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:07,302 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 20:05:07,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:05:07,303 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:07,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:07,303 INFO L85 PathProgramCache]: Analyzing trace with hash -976599024, now seen corresponding path program 6 times [2024-06-27 20:05:07,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:07,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81754957] [2024-06-27 20:05:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:07,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:07,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:08,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:08,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81754957] [2024-06-27 20:05:08,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81754957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:08,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:08,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:08,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847008392] [2024-06-27 20:05:08,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:08,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:08,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:08,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:08,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:08,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 314 transitions, 3596 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 20:05:08,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:08,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:08,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:10,420 INFO L124 PetriNetUnfolderBase]: 3996/6052 cut-off events. [2024-06-27 20:05:10,420 INFO L125 PetriNetUnfolderBase]: For 1050924/1050926 co-relation queries the response was YES. [2024-06-27 20:05:10,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62005 conditions, 6052 events. 3996/6052 cut-off events. For 1050924/1050926 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 32243 event pairs, 856 based on Foata normal form. 6/6058 useless extension candidates. Maximal degree in co-relation 61885. Up to 5286 conditions per place. [2024-06-27 20:05:10,495 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 259 selfloop transitions, 79 changer transitions 0/361 dead transitions. [2024-06-27 20:05:10,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 361 transitions, 4858 flow [2024-06-27 20:05:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:05:10,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-27 20:05:10,497 INFO L175 Difference]: Start difference. First operand has 261 places, 314 transitions, 3596 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:05:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 361 transitions, 4858 flow [2024-06-27 20:05:11,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 361 transitions, 4631 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:11,554 INFO L231 Difference]: Finished difference. Result has 266 places, 318 transitions, 3732 flow [2024-06-27 20:05:11,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3732, PETRI_PLACES=266, PETRI_TRANSITIONS=318} [2024-06-27 20:05:11,554 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 222 predicate places. [2024-06-27 20:05:11,554 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 318 transitions, 3732 flow [2024-06-27 20:05:11,555 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 20:05:11,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:11,555 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 20:05:11,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:05:11,555 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:11,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:11,556 INFO L85 PathProgramCache]: Analyzing trace with hash -458114890, now seen corresponding path program 7 times [2024-06-27 20:05:11,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:11,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847790674] [2024-06-27 20:05:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:11,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847790674] [2024-06-27 20:05:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847790674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:13,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581131529] [2024-06-27 20:05:13,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:13,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:13,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:13,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:13,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 318 transitions, 3732 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 20:05:13,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:13,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:13,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:14,830 INFO L124 PetriNetUnfolderBase]: 4013/6079 cut-off events. [2024-06-27 20:05:14,831 INFO L125 PetriNetUnfolderBase]: For 1076485/1076487 co-relation queries the response was YES. [2024-06-27 20:05:14,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62385 conditions, 6079 events. 4013/6079 cut-off events. For 1076485/1076487 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32430 event pairs, 881 based on Foata normal form. 6/6085 useless extension candidates. Maximal degree in co-relation 62264. Up to 5378 conditions per place. [2024-06-27 20:05:14,897 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 260 selfloop transitions, 79 changer transitions 0/362 dead transitions. [2024-06-27 20:05:14,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 362 transitions, 4657 flow [2024-06-27 20:05:14,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:05:14,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:05:14,898 INFO L175 Difference]: Start difference. First operand has 266 places, 318 transitions, 3732 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:05:14,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 362 transitions, 4657 flow [2024-06-27 20:05:15,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 362 transitions, 4459 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:15,926 INFO L231 Difference]: Finished difference. Result has 270 places, 322 transitions, 3830 flow [2024-06-27 20:05:15,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3830, PETRI_PLACES=270, PETRI_TRANSITIONS=322} [2024-06-27 20:05:15,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-27 20:05:15,926 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 322 transitions, 3830 flow [2024-06-27 20:05:15,927 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 20:05:15,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:15,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:15,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:05:15,927 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:15,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -458106520, now seen corresponding path program 8 times [2024-06-27 20:05:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:15,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627838913] [2024-06-27 20:05:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:17,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:17,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627838913] [2024-06-27 20:05:17,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627838913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:17,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:17,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:17,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073376199] [2024-06-27 20:05:17,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:17,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:17,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:17,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:17,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:17,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 322 transitions, 3830 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 20:05:17,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:17,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:17,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:19,002 INFO L124 PetriNetUnfolderBase]: 4030/6106 cut-off events. [2024-06-27 20:05:19,002 INFO L125 PetriNetUnfolderBase]: For 1102673/1102675 co-relation queries the response was YES. [2024-06-27 20:05:19,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63224 conditions, 6106 events. 4030/6106 cut-off events. For 1102673/1102675 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 32622 event pairs, 896 based on Foata normal form. 6/6112 useless extension candidates. Maximal degree in co-relation 63101. Up to 5364 conditions per place. [2024-06-27 20:05:19,080 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 259 selfloop transitions, 82 changer transitions 0/364 dead transitions. [2024-06-27 20:05:19,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 364 transitions, 4734 flow [2024-06-27 20:05:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:19,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:05:19,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-27 20:05:19,081 INFO L175 Difference]: Start difference. First operand has 270 places, 322 transitions, 3830 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:05:19,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 364 transitions, 4734 flow [2024-06-27 20:05:20,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 364 transitions, 4505 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:20,175 INFO L231 Difference]: Finished difference. Result has 274 places, 324 transitions, 3880 flow [2024-06-27 20:05:20,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3601, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3880, PETRI_PLACES=274, PETRI_TRANSITIONS=324} [2024-06-27 20:05:20,176 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-27 20:05:20,176 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 324 transitions, 3880 flow [2024-06-27 20:05:20,176 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 20:05:20,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:20,176 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 20:05:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:05:20,176 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:20,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash -694290250, now seen corresponding path program 9 times [2024-06-27 20:05:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185641326] [2024-06-27 20:05:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:20,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:21,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:21,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185641326] [2024-06-27 20:05:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185641326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:21,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038148611] [2024-06-27 20:05:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:21,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:21,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 324 transitions, 3880 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 20:05:21,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:21,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:21,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:23,278 INFO L124 PetriNetUnfolderBase]: 4022/6094 cut-off events. [2024-06-27 20:05:23,278 INFO L125 PetriNetUnfolderBase]: For 1117113/1117115 co-relation queries the response was YES. [2024-06-27 20:05:23,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63151 conditions, 6094 events. 4022/6094 cut-off events. For 1117113/1117115 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 32542 event pairs, 879 based on Foata normal form. 6/6100 useless extension candidates. Maximal degree in co-relation 63027. Up to 5393 conditions per place. [2024-06-27 20:05:23,356 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 265 selfloop transitions, 77 changer transitions 0/365 dead transitions. [2024-06-27 20:05:23,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 365 transitions, 4688 flow [2024-06-27 20:05:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:05:23,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-27 20:05:23,358 INFO L175 Difference]: Start difference. First operand has 274 places, 324 transitions, 3880 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:05:23,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 365 transitions, 4688 flow [2024-06-27 20:05:24,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 365 transitions, 4363 flow, removed 82 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:24,843 INFO L231 Difference]: Finished difference. Result has 276 places, 324 transitions, 3716 flow [2024-06-27 20:05:24,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3716, PETRI_PLACES=276, PETRI_TRANSITIONS=324} [2024-06-27 20:05:24,844 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 232 predicate places. [2024-06-27 20:05:24,844 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 324 transitions, 3716 flow [2024-06-27 20:05:24,844 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 20:05:24,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:24,844 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 20:05:24,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:05:24,844 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:24,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:24,845 INFO L85 PathProgramCache]: Analyzing trace with hash -694474948, now seen corresponding path program 6 times [2024-06-27 20:05:24,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:24,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29410737] [2024-06-27 20:05:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:26,415 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 20:05:26,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:26,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29410737] [2024-06-27 20:05:26,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29410737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:26,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455425760] [2024-06-27 20:05:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:26,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:05:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 324 transitions, 3716 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:05:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:28,017 INFO L124 PetriNetUnfolderBase]: 3844/5932 cut-off events. [2024-06-27 20:05:28,017 INFO L125 PetriNetUnfolderBase]: For 1171673/1171697 co-relation queries the response was YES. [2024-06-27 20:05:28,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61666 conditions, 5932 events. 3844/5932 cut-off events. For 1171673/1171697 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33220 event pairs, 766 based on Foata normal form. 24/5930 useless extension candidates. Maximal degree in co-relation 61541. Up to 4771 conditions per place. [2024-06-27 20:05:28,100 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 234 selfloop transitions, 99 changer transitions 0/376 dead transitions. [2024-06-27 20:05:28,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 376 transitions, 4930 flow [2024-06-27 20:05:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:05:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:05:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 20:05:28,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693446088794926 [2024-06-27 20:05:28,101 INFO L175 Difference]: Start difference. First operand has 276 places, 324 transitions, 3716 flow. Second operand 11 states and 222 transitions. [2024-06-27 20:05:28,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 376 transitions, 4930 flow [2024-06-27 20:05:29,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 376 transitions, 4748 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-27 20:05:29,159 INFO L231 Difference]: Finished difference. Result has 277 places, 325 transitions, 3829 flow [2024-06-27 20:05:29,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3534, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3829, PETRI_PLACES=277, PETRI_TRANSITIONS=325} [2024-06-27 20:05:29,160 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-27 20:05:29,160 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 325 transitions, 3829 flow [2024-06-27 20:05:29,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:05:29,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:29,160 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 20:05:29,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:05:29,160 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:29,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -457818220, now seen corresponding path program 10 times [2024-06-27 20:05:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007664760] [2024-06-27 20:05:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:30,802 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 20:05:30,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:30,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007664760] [2024-06-27 20:05:30,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007664760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:30,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:30,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:30,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370930309] [2024-06-27 20:05:30,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:30,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:31,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:31,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 325 transitions, 3829 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 20:05:31,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:31,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:31,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:32,372 INFO L124 PetriNetUnfolderBase]: 4142/6284 cut-off events. [2024-06-27 20:05:32,372 INFO L125 PetriNetUnfolderBase]: For 1200207/1200209 co-relation queries the response was YES. [2024-06-27 20:05:32,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65809 conditions, 6284 events. 4142/6284 cut-off events. For 1200207/1200209 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33936 event pairs, 903 based on Foata normal form. 6/6277 useless extension candidates. Maximal degree in co-relation 65684. Up to 5312 conditions per place. [2024-06-27 20:05:32,459 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 242 selfloop transitions, 102 changer transitions 0/367 dead transitions. [2024-06-27 20:05:32,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 367 transitions, 4743 flow [2024-06-27 20:05:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:05:32,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:05:32,460 INFO L175 Difference]: Start difference. First operand has 277 places, 325 transitions, 3829 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:05:32,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 367 transitions, 4743 flow [2024-06-27 20:05:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 367 transitions, 4490 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 20:05:33,672 INFO L231 Difference]: Finished difference. Result has 278 places, 327 transitions, 3901 flow [2024-06-27 20:05:33,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3576, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3901, PETRI_PLACES=278, PETRI_TRANSITIONS=327} [2024-06-27 20:05:33,673 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 20:05:33,673 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 327 transitions, 3901 flow [2024-06-27 20:05:33,673 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 20:05:33,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:33,673 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 20:05:33,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:05:33,674 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 20:05:33,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1637650736, now seen corresponding path program 2 times [2024-06-27 20:05:33,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:33,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790849405] [2024-06-27 20:05:33,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:33,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:34,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790849405] [2024-06-27 20:05:34,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790849405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:34,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:34,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:34,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082778326] [2024-06-27 20:05:34,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:34,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:34,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:34,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 327 transitions, 3901 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 20:05:34,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:34,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:34,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:35,978 INFO L124 PetriNetUnfolderBase]: 4108/6263 cut-off events. [2024-06-27 20:05:35,978 INFO L125 PetriNetUnfolderBase]: For 1210085/1210096 co-relation queries the response was YES. [2024-06-27 20:05:36,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65139 conditions, 6263 events. 4108/6263 cut-off events. For 1210085/1210096 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 34094 event pairs, 1048 based on Foata normal form. 5/6261 useless extension candidates. Maximal degree in co-relation 65013. Up to 5899 conditions per place. [2024-06-27 20:05:36,062 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 287 selfloop transitions, 44 changer transitions 0/358 dead transitions. [2024-06-27 20:05:36,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 358 transitions, 5079 flow [2024-06-27 20:05:36,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:05:36,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-27 20:05:36,064 INFO L175 Difference]: Start difference. First operand has 278 places, 327 transitions, 3901 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:05:36,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 358 transitions, 5079 flow [2024-06-27 20:05:37,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 358 transitions, 4772 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 20:05:37,470 INFO L231 Difference]: Finished difference. Result has 278 places, 333 transitions, 3804 flow [2024-06-27 20:05:37,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3594, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3804, PETRI_PLACES=278, PETRI_TRANSITIONS=333} [2024-06-27 20:05:37,471 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-27 20:05:37,471 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 333 transitions, 3804 flow [2024-06-27 20:05:37,471 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 20:05:37,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:37,471 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 20:05:37,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:05:37,471 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 20:05:37,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:37,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1637637716, now seen corresponding path program 3 times [2024-06-27 20:05:37,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:37,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498566187] [2024-06-27 20:05:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:37,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:38,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:38,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498566187] [2024-06-27 20:05:38,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498566187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:38,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:38,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:38,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428218974] [2024-06-27 20:05:38,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:38,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:38,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:38,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:38,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:38,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 333 transitions, 3804 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 20:05:38,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:38,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:39,834 INFO L124 PetriNetUnfolderBase]: 4107/6259 cut-off events. [2024-06-27 20:05:39,834 INFO L125 PetriNetUnfolderBase]: For 1218838/1218849 co-relation queries the response was YES. [2024-06-27 20:05:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64500 conditions, 6259 events. 4107/6259 cut-off events. For 1218838/1218849 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34029 event pairs, 1089 based on Foata normal form. 5/6257 useless extension candidates. Maximal degree in co-relation 64373. Up to 5905 conditions per place. [2024-06-27 20:05:39,913 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 289 selfloop transitions, 43 changer transitions 0/359 dead transitions. [2024-06-27 20:05:39,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 359 transitions, 4706 flow [2024-06-27 20:05:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:39,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:05:39,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:05:39,914 INFO L175 Difference]: Start difference. First operand has 278 places, 333 transitions, 3804 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:05:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 359 transitions, 4706 flow [2024-06-27 20:05:41,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 359 transitions, 4560 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 20:05:41,234 INFO L231 Difference]: Finished difference. Result has 282 places, 333 transitions, 3750 flow [2024-06-27 20:05:41,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3750, PETRI_PLACES=282, PETRI_TRANSITIONS=333} [2024-06-27 20:05:41,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-27 20:05:41,234 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 333 transitions, 3750 flow [2024-06-27 20:05:41,234 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 20:05:41,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:41,234 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 20:05:41,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:05:41,235 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:41,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1637637313, now seen corresponding path program 3 times [2024-06-27 20:05:41,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:41,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152489138] [2024-06-27 20:05:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:42,221 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 20:05:42,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:42,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152489138] [2024-06-27 20:05:42,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152489138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:42,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:42,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:05:42,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327139005] [2024-06-27 20:05:42,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:42,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:05:42,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:42,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:05:42,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:05:42,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:42,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 333 transitions, 3750 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 20:05:42,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:42,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:42,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:43,700 INFO L124 PetriNetUnfolderBase]: 4112/6268 cut-off events. [2024-06-27 20:05:43,700 INFO L125 PetriNetUnfolderBase]: For 1239060/1239071 co-relation queries the response was YES. [2024-06-27 20:05:43,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64636 conditions, 6268 events. 4112/6268 cut-off events. For 1239060/1239071 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 34106 event pairs, 1086 based on Foata normal form. 4/6265 useless extension candidates. Maximal degree in co-relation 64508. Up to 5967 conditions per place. [2024-06-27 20:05:43,769 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 287 selfloop transitions, 40 changer transitions 0/354 dead transitions. [2024-06-27 20:05:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 354 transitions, 4663 flow [2024-06-27 20:05:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:05:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:05:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:05:43,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-27 20:05:43,771 INFO L175 Difference]: Start difference. First operand has 282 places, 333 transitions, 3750 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:05:43,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 354 transitions, 4663 flow [2024-06-27 20:05:45,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 354 transitions, 4569 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:05:45,011 INFO L231 Difference]: Finished difference. Result has 283 places, 336 transitions, 3785 flow [2024-06-27 20:05:45,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3656, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3785, PETRI_PLACES=283, PETRI_TRANSITIONS=336} [2024-06-27 20:05:45,011 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-27 20:05:45,011 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 336 transitions, 3785 flow [2024-06-27 20:05:45,011 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 20:05:45,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:45,011 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 20:05:45,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:05:45,012 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:45,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:45,012 INFO L85 PathProgramCache]: Analyzing trace with hash -114311769, now seen corresponding path program 3 times [2024-06-27 20:05:45,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:45,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108534144] [2024-06-27 20:05:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:45,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:45,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:45,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108534144] [2024-06-27 20:05:45,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108534144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:45,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:45,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:45,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447547287] [2024-06-27 20:05:45,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:45,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:45,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:45,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:45,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:45,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:45,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 336 transitions, 3785 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 20:05:45,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:45,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:45,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:47,105 INFO L124 PetriNetUnfolderBase]: 4100/6230 cut-off events. [2024-06-27 20:05:47,106 INFO L125 PetriNetUnfolderBase]: For 1252911/1252921 co-relation queries the response was YES. [2024-06-27 20:05:47,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64982 conditions, 6230 events. 4100/6230 cut-off events. For 1252911/1252921 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33690 event pairs, 1065 based on Foata normal form. 1/6196 useless extension candidates. Maximal degree in co-relation 64853. Up to 5949 conditions per place. [2024-06-27 20:05:47,192 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 297 selfloop transitions, 24 changer transitions 0/353 dead transitions. [2024-06-27 20:05:47,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 353 transitions, 4643 flow [2024-06-27 20:05:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:05:47,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-27 20:05:47,193 INFO L175 Difference]: Start difference. First operand has 283 places, 336 transitions, 3785 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:05:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 353 transitions, 4643 flow [2024-06-27 20:05:48,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 353 transitions, 4541 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:48,473 INFO L231 Difference]: Finished difference. Result has 285 places, 336 transitions, 3737 flow [2024-06-27 20:05:48,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3683, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3737, PETRI_PLACES=285, PETRI_TRANSITIONS=336} [2024-06-27 20:05:48,473 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 241 predicate places. [2024-06-27 20:05:48,473 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 336 transitions, 3737 flow [2024-06-27 20:05:48,473 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 20:05:48,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:48,474 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 20:05:48,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:05:48,474 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:48,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:48,474 INFO L85 PathProgramCache]: Analyzing trace with hash -113923959, now seen corresponding path program 4 times [2024-06-27 20:05:48,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:48,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521963239] [2024-06-27 20:05:48,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:48,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:49,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:49,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521963239] [2024-06-27 20:05:49,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521963239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:49,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:49,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:05:49,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559120998] [2024-06-27 20:05:49,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:49,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:05:49,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:05:49,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:05:49,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:49,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 336 transitions, 3737 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 20:05:49,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:49,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:49,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:50,786 INFO L124 PetriNetUnfolderBase]: 4092/6224 cut-off events. [2024-06-27 20:05:50,787 INFO L125 PetriNetUnfolderBase]: For 1278447/1278457 co-relation queries the response was YES. [2024-06-27 20:05:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65198 conditions, 6224 events. 4092/6224 cut-off events. For 1278447/1278457 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33685 event pairs, 1041 based on Foata normal form. 1/6190 useless extension candidates. Maximal degree in co-relation 65068. Up to 5958 conditions per place. [2024-06-27 20:05:50,875 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 301 selfloop transitions, 19 changer transitions 0/352 dead transitions. [2024-06-27 20:05:50,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 352 transitions, 4460 flow [2024-06-27 20:05:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:05:50,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:05:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-27 20:05:50,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39867109634551495 [2024-06-27 20:05:50,878 INFO L175 Difference]: Start difference. First operand has 285 places, 336 transitions, 3737 flow. Second operand 7 states and 120 transitions. [2024-06-27 20:05:50,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 352 transitions, 4460 flow [2024-06-27 20:05:52,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 352 transitions, 4356 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 20:05:52,362 INFO L231 Difference]: Finished difference. Result has 286 places, 339 transitions, 3734 flow [2024-06-27 20:05:52,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3649, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3734, PETRI_PLACES=286, PETRI_TRANSITIONS=339} [2024-06-27 20:05:52,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-27 20:05:52,362 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 339 transitions, 3734 flow [2024-06-27 20:05:52,363 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 20:05:52,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:52,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:05:52,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:05:52,363 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:52,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1122334902, now seen corresponding path program 11 times [2024-06-27 20:05:52,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:52,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733649148] [2024-06-27 20:05:52,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733649148] [2024-06-27 20:05:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733649148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626641794] [2024-06-27 20:05:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:54,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:54,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 339 transitions, 3734 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 20:05:54,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:54,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:54,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:05:55,699 INFO L124 PetriNetUnfolderBase]: 4208/6385 cut-off events. [2024-06-27 20:05:55,699 INFO L125 PetriNetUnfolderBase]: For 1324114/1324114 co-relation queries the response was YES. [2024-06-27 20:05:55,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66746 conditions, 6385 events. 4208/6385 cut-off events. For 1324114/1324114 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 34513 event pairs, 1023 based on Foata normal form. 4/6389 useless extension candidates. Maximal degree in co-relation 66615. Up to 5969 conditions per place. [2024-06-27 20:05:55,774 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 318 selfloop transitions, 40 changer transitions 0/383 dead transitions. [2024-06-27 20:05:55,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 383 transitions, 4743 flow [2024-06-27 20:05:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:05:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:05:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-27 20:05:55,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255813953488372 [2024-06-27 20:05:55,776 INFO L175 Difference]: Start difference. First operand has 286 places, 339 transitions, 3734 flow. Second operand 10 states and 183 transitions. [2024-06-27 20:05:55,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 383 transitions, 4743 flow [2024-06-27 20:05:57,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 383 transitions, 4689 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:05:57,246 INFO L231 Difference]: Finished difference. Result has 292 places, 347 transitions, 3986 flow [2024-06-27 20:05:57,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3680, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3986, PETRI_PLACES=292, PETRI_TRANSITIONS=347} [2024-06-27 20:05:57,246 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 248 predicate places. [2024-06-27 20:05:57,246 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 347 transitions, 3986 flow [2024-06-27 20:05:57,246 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 20:05:57,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:05:57,246 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 20:05:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:05:57,246 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:05:57,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:05:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash 217359458, now seen corresponding path program 12 times [2024-06-27 20:05:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:05:57,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753578440] [2024-06-27 20:05:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:05:57,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:05:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:05:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:05:58,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:05:58,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753578440] [2024-06-27 20:05:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753578440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:05:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:05:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:05:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119212542] [2024-06-27 20:05:58,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:05:58,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:05:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:05:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:05:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:05:58,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:05:58,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 347 transitions, 3986 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 20:05:58,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:05:58,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:05:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:00,394 INFO L124 PetriNetUnfolderBase]: 4226/6413 cut-off events. [2024-06-27 20:06:00,394 INFO L125 PetriNetUnfolderBase]: For 1360660/1360660 co-relation queries the response was YES. [2024-06-27 20:06:00,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68047 conditions, 6413 events. 4226/6413 cut-off events. For 1360660/1360660 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34696 event pairs, 1037 based on Foata normal form. 4/6417 useless extension candidates. Maximal degree in co-relation 67914. Up to 6134 conditions per place. [2024-06-27 20:06:00,665 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 337 selfloop transitions, 22 changer transitions 0/384 dead transitions. [2024-06-27 20:06:00,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 384 transitions, 4914 flow [2024-06-27 20:06:00,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:00,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:06:00,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-27 20:06:00,666 INFO L175 Difference]: Start difference. First operand has 292 places, 347 transitions, 3986 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:06:00,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 384 transitions, 4914 flow [2024-06-27 20:06:02,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 384 transitions, 4738 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:02,442 INFO L231 Difference]: Finished difference. Result has 297 places, 349 transitions, 3983 flow [2024-06-27 20:06:02,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3983, PETRI_PLACES=297, PETRI_TRANSITIONS=349} [2024-06-27 20:06:02,443 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-27 20:06:02,443 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 349 transitions, 3983 flow [2024-06-27 20:06:02,443 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 20:06:02,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:02,443 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 20:06:02,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:06:02,443 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:02,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1122343272, now seen corresponding path program 13 times [2024-06-27 20:06:02,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:02,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605118273] [2024-06-27 20:06:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:03,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:03,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:03,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605118273] [2024-06-27 20:06:03,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605118273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:03,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:03,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:03,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702852595] [2024-06-27 20:06:03,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:03,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:03,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:03,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:03,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:04,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:04,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 349 transitions, 3983 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 20:06:04,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:04,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:04,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:05,577 INFO L124 PetriNetUnfolderBase]: 4243/6440 cut-off events. [2024-06-27 20:06:05,577 INFO L125 PetriNetUnfolderBase]: For 1393032/1393032 co-relation queries the response was YES. [2024-06-27 20:06:05,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68525 conditions, 6440 events. 4243/6440 cut-off events. For 1393032/1393032 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 34877 event pairs, 1020 based on Foata normal form. 4/6444 useless extension candidates. Maximal degree in co-relation 68391. Up to 5983 conditions per place. [2024-06-27 20:06:05,664 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 319 selfloop transitions, 43 changer transitions 0/387 dead transitions. [2024-06-27 20:06:05,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 387 transitions, 4923 flow [2024-06-27 20:06:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-27 20:06:05,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42790697674418604 [2024-06-27 20:06:05,666 INFO L175 Difference]: Start difference. First operand has 297 places, 349 transitions, 3983 flow. Second operand 10 states and 184 transitions. [2024-06-27 20:06:05,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 387 transitions, 4923 flow [2024-06-27 20:06:07,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 387 transitions, 4776 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:07,045 INFO L231 Difference]: Finished difference. Result has 301 places, 351 transitions, 4055 flow [2024-06-27 20:06:07,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4055, PETRI_PLACES=301, PETRI_TRANSITIONS=351} [2024-06-27 20:06:07,046 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 257 predicate places. [2024-06-27 20:06:07,046 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 351 transitions, 4055 flow [2024-06-27 20:06:07,046 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 20:06:07,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:07,046 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 20:06:07,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:06:07,047 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:07,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash 754743984, now seen corresponding path program 14 times [2024-06-27 20:06:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:07,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051297086] [2024-06-27 20:06:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:07,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:08,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:08,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051297086] [2024-06-27 20:06:08,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051297086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:08,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:08,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:08,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948737158] [2024-06-27 20:06:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:08,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:08,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:08,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:08,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 351 transitions, 4055 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 20:06:08,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:08,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:08,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:09,908 INFO L124 PetriNetUnfolderBase]: 4285/6506 cut-off events. [2024-06-27 20:06:09,908 INFO L125 PetriNetUnfolderBase]: For 1442240/1442240 co-relation queries the response was YES. [2024-06-27 20:06:09,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70100 conditions, 6506 events. 4285/6506 cut-off events. For 1442240/1442240 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 35361 event pairs, 1054 based on Foata normal form. 4/6510 useless extension candidates. Maximal degree in co-relation 69965. Up to 6042 conditions per place. [2024-06-27 20:06:10,001 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 327 selfloop transitions, 40 changer transitions 0/392 dead transitions. [2024-06-27 20:06:10,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 392 transitions, 5445 flow [2024-06-27 20:06:10,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:10,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:06:10,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-27 20:06:10,002 INFO L175 Difference]: Start difference. First operand has 301 places, 351 transitions, 4055 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:06:10,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 392 transitions, 5445 flow [2024-06-27 20:06:11,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 392 transitions, 5244 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-27 20:06:11,584 INFO L231 Difference]: Finished difference. Result has 303 places, 355 transitions, 4197 flow [2024-06-27 20:06:11,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4197, PETRI_PLACES=303, PETRI_TRANSITIONS=355} [2024-06-27 20:06:11,585 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-27 20:06:11,585 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 355 transitions, 4197 flow [2024-06-27 20:06:11,585 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 20:06:11,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:11,585 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 20:06:11,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:06:11,585 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:11,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:11,586 INFO L85 PathProgramCache]: Analyzing trace with hash 516934320, now seen corresponding path program 15 times [2024-06-27 20:06:11,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:11,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842646253] [2024-06-27 20:06:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:11,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:12,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:12,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842646253] [2024-06-27 20:06:12,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842646253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:12,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:12,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:12,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455402792] [2024-06-27 20:06:12,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:12,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:12,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:12,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:12,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:13,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:13,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 355 transitions, 4197 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 20:06:13,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:13,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:13,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:14,732 INFO L124 PetriNetUnfolderBase]: 4327/6572 cut-off events. [2024-06-27 20:06:14,733 INFO L125 PetriNetUnfolderBase]: For 1493667/1493667 co-relation queries the response was YES. [2024-06-27 20:06:14,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71573 conditions, 6572 events. 4327/6572 cut-off events. For 1493667/1493667 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 35775 event pairs, 1056 based on Foata normal form. 4/6576 useless extension candidates. Maximal degree in co-relation 71437. Up to 5999 conditions per place. [2024-06-27 20:06:14,827 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 322 selfloop transitions, 50 changer transitions 0/397 dead transitions. [2024-06-27 20:06:14,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 397 transitions, 5613 flow [2024-06-27 20:06:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:06:14,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-27 20:06:14,829 INFO L175 Difference]: Start difference. First operand has 303 places, 355 transitions, 4197 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:06:14,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 397 transitions, 5613 flow [2024-06-27 20:06:16,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 397 transitions, 5431 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:16,432 INFO L231 Difference]: Finished difference. Result has 307 places, 359 transitions, 4386 flow [2024-06-27 20:06:16,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4015, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4386, PETRI_PLACES=307, PETRI_TRANSITIONS=359} [2024-06-27 20:06:16,432 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 263 predicate places. [2024-06-27 20:06:16,432 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 359 transitions, 4386 flow [2024-06-27 20:06:16,432 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 20:06:16,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:16,432 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 20:06:16,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:06:16,433 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:16,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:16,433 INFO L85 PathProgramCache]: Analyzing trace with hash 280462290, now seen corresponding path program 16 times [2024-06-27 20:06:16,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:16,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598164689] [2024-06-27 20:06:16,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:16,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:18,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:18,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598164689] [2024-06-27 20:06:18,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598164689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:18,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:18,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:18,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837865886] [2024-06-27 20:06:18,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:18,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:18,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:18,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 359 transitions, 4386 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 20:06:18,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:18,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:18,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:19,746 INFO L124 PetriNetUnfolderBase]: 4366/6631 cut-off events. [2024-06-27 20:06:19,746 INFO L125 PetriNetUnfolderBase]: For 1525427/1525427 co-relation queries the response was YES. [2024-06-27 20:06:19,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72493 conditions, 6631 events. 4366/6631 cut-off events. For 1525427/1525427 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36194 event pairs, 1041 based on Foata normal form. 4/6635 useless extension candidates. Maximal degree in co-relation 72355. Up to 6202 conditions per place. [2024-06-27 20:06:19,829 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 329 selfloop transitions, 46 changer transitions 0/400 dead transitions. [2024-06-27 20:06:19,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 400 transitions, 5410 flow [2024-06-27 20:06:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:06:19,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-27 20:06:19,830 INFO L175 Difference]: Start difference. First operand has 307 places, 359 transitions, 4386 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:06:19,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 400 transitions, 5410 flow [2024-06-27 20:06:22,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 400 transitions, 5175 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:22,007 INFO L231 Difference]: Finished difference. Result has 311 places, 364 transitions, 4432 flow [2024-06-27 20:06:22,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4432, PETRI_PLACES=311, PETRI_TRANSITIONS=364} [2024-06-27 20:06:22,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-27 20:06:22,007 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 364 transitions, 4432 flow [2024-06-27 20:06:22,008 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 20:06:22,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:22,008 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 20:06:22,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:06:22,008 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 20:06:22,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash 280277592, now seen corresponding path program 7 times [2024-06-27 20:06:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707344223] [2024-06-27 20:06:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:22,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:23,478 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 20:06:23,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707344223] [2024-06-27 20:06:23,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707344223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:23,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:23,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:23,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522086175] [2024-06-27 20:06:23,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:23,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:23,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:23,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:06:23,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 364 transitions, 4432 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:23,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:23,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:06:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:25,428 INFO L124 PetriNetUnfolderBase]: 4066/6295 cut-off events. [2024-06-27 20:06:25,428 INFO L125 PetriNetUnfolderBase]: For 1530843/1530889 co-relation queries the response was YES. [2024-06-27 20:06:25,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68559 conditions, 6295 events. 4066/6295 cut-off events. For 1530843/1530889 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35767 event pairs, 920 based on Foata normal form. 22/6290 useless extension candidates. Maximal degree in co-relation 68419. Up to 5469 conditions per place. [2024-06-27 20:06:25,505 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 301 selfloop transitions, 67 changer transitions 0/415 dead transitions. [2024-06-27 20:06:25,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 415 transitions, 5908 flow [2024-06-27 20:06:25,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:06:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:06:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:06:25,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:06:25,506 INFO L175 Difference]: Start difference. First operand has 311 places, 364 transitions, 4432 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:06:25,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 415 transitions, 5908 flow [2024-06-27 20:06:26,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 415 transitions, 5719 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:26,999 INFO L231 Difference]: Finished difference. Result has 316 places, 368 transitions, 4654 flow [2024-06-27 20:06:26,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4654, PETRI_PLACES=316, PETRI_TRANSITIONS=368} [2024-06-27 20:06:26,999 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-27 20:06:27,000 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 368 transitions, 4654 flow [2024-06-27 20:06:27,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:27,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:27,000 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 20:06:27,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:06:27,000 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 20:06:27,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash 286949040, now seen corresponding path program 17 times [2024-06-27 20:06:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605757071] [2024-06-27 20:06:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:28,475 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 20:06:28,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:28,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605757071] [2024-06-27 20:06:28,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605757071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:28,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:28,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:28,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631649842] [2024-06-27 20:06:28,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:28,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:28,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:28,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:28,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 368 transitions, 4654 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 20:06:28,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:28,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:28,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:30,281 INFO L124 PetriNetUnfolderBase]: 4410/6719 cut-off events. [2024-06-27 20:06:30,281 INFO L125 PetriNetUnfolderBase]: For 1586251/1586251 co-relation queries the response was YES. [2024-06-27 20:06:30,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73597 conditions, 6719 events. 4410/6719 cut-off events. For 1586251/1586251 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 36967 event pairs, 1048 based on Foata normal form. 4/6723 useless extension candidates. Maximal degree in co-relation 73455. Up to 6290 conditions per place. [2024-06-27 20:06:30,378 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 337 selfloop transitions, 44 changer transitions 0/406 dead transitions. [2024-06-27 20:06:30,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 406 transitions, 5620 flow [2024-06-27 20:06:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:06:30,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-27 20:06:30,379 INFO L175 Difference]: Start difference. First operand has 316 places, 368 transitions, 4654 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:06:30,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 406 transitions, 5620 flow [2024-06-27 20:06:33,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 406 transitions, 5184 flow, removed 108 selfloop flow, removed 9 redundant places. [2024-06-27 20:06:33,076 INFO L231 Difference]: Finished difference. Result has 317 places, 370 transitions, 4425 flow [2024-06-27 20:06:33,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4425, PETRI_PLACES=317, PETRI_TRANSITIONS=370} [2024-06-27 20:06:33,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-27 20:06:33,077 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 370 transitions, 4425 flow [2024-06-27 20:06:33,077 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 20:06:33,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:33,077 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 20:06:33,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:06:33,077 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 20:06:33,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash 892654662, now seen corresponding path program 18 times [2024-06-27 20:06:33,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:33,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973242887] [2024-06-27 20:06:33,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:33,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973242887] [2024-06-27 20:06:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973242887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:34,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:34,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269798711] [2024-06-27 20:06:34,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:34,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:34,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:34,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 370 transitions, 4425 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 20:06:34,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:34,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:34,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:36,329 INFO L124 PetriNetUnfolderBase]: 4402/6707 cut-off events. [2024-06-27 20:06:36,329 INFO L125 PetriNetUnfolderBase]: For 1561116/1561116 co-relation queries the response was YES. [2024-06-27 20:06:36,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71966 conditions, 6707 events. 4402/6707 cut-off events. For 1561116/1561116 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 36863 event pairs, 1046 based on Foata normal form. 4/6711 useless extension candidates. Maximal degree in co-relation 71822. Up to 6219 conditions per place. [2024-06-27 20:06:36,421 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 332 selfloop transitions, 49 changer transitions 0/406 dead transitions. [2024-06-27 20:06:36,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 406 transitions, 5281 flow [2024-06-27 20:06:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:36,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:36,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-27 20:06:36,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-27 20:06:36,422 INFO L175 Difference]: Start difference. First operand has 317 places, 370 transitions, 4425 flow. Second operand 10 states and 182 transitions. [2024-06-27 20:06:36,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 406 transitions, 5281 flow [2024-06-27 20:06:38,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 406 transitions, 5022 flow, removed 91 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:38,611 INFO L231 Difference]: Finished difference. Result has 320 places, 370 transitions, 4271 flow [2024-06-27 20:06:38,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4166, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4271, PETRI_PLACES=320, PETRI_TRANSITIONS=370} [2024-06-27 20:06:38,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 276 predicate places. [2024-06-27 20:06:38,612 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 370 transitions, 4271 flow [2024-06-27 20:06:38,612 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 20:06:38,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:38,612 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 20:06:38,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:06:38,613 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 20:06:38,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:38,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1870653582, now seen corresponding path program 19 times [2024-06-27 20:06:38,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:38,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709404330] [2024-06-27 20:06:38,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:38,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:39,970 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 20:06:39,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:39,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709404330] [2024-06-27 20:06:39,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709404330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:39,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313956585] [2024-06-27 20:06:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:39,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:39,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:40,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:40,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 370 transitions, 4271 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 20:06:40,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:40,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:40,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:41,761 INFO L124 PetriNetUnfolderBase]: 4419/6734 cut-off events. [2024-06-27 20:06:41,761 INFO L125 PetriNetUnfolderBase]: For 1586746/1586746 co-relation queries the response was YES. [2024-06-27 20:06:41,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72192 conditions, 6734 events. 4419/6734 cut-off events. For 1586746/1586746 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 37023 event pairs, 1081 based on Foata normal form. 4/6738 useless extension candidates. Maximal degree in co-relation 72047. Up to 6401 conditions per place. [2024-06-27 20:06:41,851 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 347 selfloop transitions, 35 changer transitions 0/407 dead transitions. [2024-06-27 20:06:41,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 407 transitions, 5233 flow [2024-06-27 20:06:41,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:41,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:41,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:06:41,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-27 20:06:41,852 INFO L175 Difference]: Start difference. First operand has 320 places, 370 transitions, 4271 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:06:41,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 407 transitions, 5233 flow [2024-06-27 20:06:43,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 407 transitions, 5096 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 20:06:43,912 INFO L231 Difference]: Finished difference. Result has 321 places, 372 transitions, 4324 flow [2024-06-27 20:06:43,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4134, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4324, PETRI_PLACES=321, PETRI_TRANSITIONS=372} [2024-06-27 20:06:43,912 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-27 20:06:43,913 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 372 transitions, 4324 flow [2024-06-27 20:06:43,913 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 20:06:43,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:43,913 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 20:06:43,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:06:43,913 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 20:06:43,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1870653830, now seen corresponding path program 1 times [2024-06-27 20:06:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:43,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897268467] [2024-06-27 20:06:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897268467] [2024-06-27 20:06:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897268467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:45,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:45,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:45,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129838183] [2024-06-27 20:06:45,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:45,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:45,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:45,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:45,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:45,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:45,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 372 transitions, 4324 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 20:06:45,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:45,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:45,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:46,774 INFO L124 PetriNetUnfolderBase]: 4421/6726 cut-off events. [2024-06-27 20:06:46,774 INFO L125 PetriNetUnfolderBase]: For 1600135/1600135 co-relation queries the response was YES. [2024-06-27 20:06:46,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72008 conditions, 6726 events. 4421/6726 cut-off events. For 1600135/1600135 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36852 event pairs, 1052 based on Foata normal form. 2/6728 useless extension candidates. Maximal degree in co-relation 71862. Up to 6397 conditions per place. [2024-06-27 20:06:47,079 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 348 selfloop transitions, 37 changer transitions 0/410 dead transitions. [2024-06-27 20:06:47,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 410 transitions, 5218 flow [2024-06-27 20:06:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:06:47,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-27 20:06:47,080 INFO L175 Difference]: Start difference. First operand has 321 places, 372 transitions, 4324 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:06:47,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 410 transitions, 5218 flow [2024-06-27 20:06:48,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 410 transitions, 5014 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-27 20:06:49,001 INFO L231 Difference]: Finished difference. Result has 323 places, 375 transitions, 4242 flow [2024-06-27 20:06:49,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4120, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4242, PETRI_PLACES=323, PETRI_TRANSITIONS=375} [2024-06-27 20:06:49,001 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-27 20:06:49,001 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 375 transitions, 4242 flow [2024-06-27 20:06:49,001 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 20:06:49,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:49,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:06:49,002 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 20:06:49,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1097042574, now seen corresponding path program 20 times [2024-06-27 20:06:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:49,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277191871] [2024-06-27 20:06:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:49,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:50,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277191871] [2024-06-27 20:06:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277191871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:50,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:50,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:50,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426940708] [2024-06-27 20:06:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:50,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:50,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:50,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:50,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:50,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 375 transitions, 4242 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 20:06:50,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:50,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:50,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:51,803 INFO L124 PetriNetUnfolderBase]: 4413/6714 cut-off events. [2024-06-27 20:06:51,803 INFO L125 PetriNetUnfolderBase]: For 1618012/1618012 co-relation queries the response was YES. [2024-06-27 20:06:51,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71538 conditions, 6714 events. 4413/6714 cut-off events. For 1618012/1618012 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36807 event pairs, 1049 based on Foata normal form. 4/6718 useless extension candidates. Maximal degree in co-relation 71391. Up to 6421 conditions per place. [2024-06-27 20:06:51,900 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 366 selfloop transitions, 21 changer transitions 0/412 dead transitions. [2024-06-27 20:06:51,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 412 transitions, 5238 flow [2024-06-27 20:06:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:51,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:51,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:06:51,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046511627906977 [2024-06-27 20:06:51,903 INFO L175 Difference]: Start difference. First operand has 323 places, 375 transitions, 4242 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:06:51,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 412 transitions, 5238 flow [2024-06-27 20:06:54,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 412 transitions, 5157 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:06:54,386 INFO L231 Difference]: Finished difference. Result has 324 places, 377 transitions, 4350 flow [2024-06-27 20:06:54,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4350, PETRI_PLACES=324, PETRI_TRANSITIONS=377} [2024-06-27 20:06:54,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 280 predicate places. [2024-06-27 20:06:54,386 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 377 transitions, 4350 flow [2024-06-27 20:06:54,387 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 20:06:54,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:54,387 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 20:06:54,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:06:54,387 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:54,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 225411398, now seen corresponding path program 21 times [2024-06-27 20:06:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:54,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939950270] [2024-06-27 20:06:54,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:54,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939950270] [2024-06-27 20:06:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939950270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:55,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:06:55,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374268490] [2024-06-27 20:06:55,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:55,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:06:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:06:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:06:55,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:06:55,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 377 transitions, 4350 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 20:06:55,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:55,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:06:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:57,641 INFO L124 PetriNetUnfolderBase]: 4447/6768 cut-off events. [2024-06-27 20:06:57,641 INFO L125 PetriNetUnfolderBase]: For 1654044/1654044 co-relation queries the response was YES. [2024-06-27 20:06:57,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72306 conditions, 6768 events. 4447/6768 cut-off events. For 1654044/1654044 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 37192 event pairs, 1065 based on Foata normal form. 4/6772 useless extension candidates. Maximal degree in co-relation 72158. Up to 6448 conditions per place. [2024-06-27 20:06:57,729 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 366 selfloop transitions, 25 changer transitions 0/416 dead transitions. [2024-06-27 20:06:57,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 416 transitions, 5344 flow [2024-06-27 20:06:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:06:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:06:57,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-27 20:06:57,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116279069767442 [2024-06-27 20:06:57,731 INFO L175 Difference]: Start difference. First operand has 324 places, 377 transitions, 4350 flow. Second operand 10 states and 177 transitions. [2024-06-27 20:06:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 416 transitions, 5344 flow [2024-06-27 20:07:00,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 416 transitions, 5173 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 20:07:00,179 INFO L231 Difference]: Finished difference. Result has 327 places, 381 transitions, 4372 flow [2024-06-27 20:07:00,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4372, PETRI_PLACES=327, PETRI_TRANSITIONS=381} [2024-06-27 20:07:00,179 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-27 20:07:00,179 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 381 transitions, 4372 flow [2024-06-27 20:07:00,180 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 20:07:00,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:00,180 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 20:07:00,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:07:00,180 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:00,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1070609070, now seen corresponding path program 22 times [2024-06-27 20:07:00,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:00,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91407049] [2024-06-27 20:07:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:01,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91407049] [2024-06-27 20:07:01,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91407049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:01,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:01,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:07:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98352852] [2024-06-27 20:07:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:01,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:07:01,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:07:01,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:07:01,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:01,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 381 transitions, 4372 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 20:07:01,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:01,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:01,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:03,579 INFO L124 PetriNetUnfolderBase]: 4439/6756 cut-off events. [2024-06-27 20:07:03,579 INFO L125 PetriNetUnfolderBase]: For 1662767/1662767 co-relation queries the response was YES. [2024-06-27 20:07:03,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71848 conditions, 6756 events. 4439/6756 cut-off events. For 1662767/1662767 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37124 event pairs, 1058 based on Foata normal form. 4/6760 useless extension candidates. Maximal degree in co-relation 71698. Up to 6341 conditions per place. [2024-06-27 20:07:03,665 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 350 selfloop transitions, 41 changer transitions 0/416 dead transitions. [2024-06-27 20:07:03,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 416 transitions, 5244 flow [2024-06-27 20:07:03,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:07:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:07:03,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:07:03,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-27 20:07:03,666 INFO L175 Difference]: Start difference. First operand has 327 places, 381 transitions, 4372 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:07:03,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 416 transitions, 5244 flow [2024-06-27 20:07:06,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 416 transitions, 5011 flow, removed 96 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:06,009 INFO L231 Difference]: Finished difference. Result has 330 places, 381 transitions, 4231 flow [2024-06-27 20:07:06,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4231, PETRI_PLACES=330, PETRI_TRANSITIONS=381} [2024-06-27 20:07:06,010 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 20:07:06,010 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 381 transitions, 4231 flow [2024-06-27 20:07:06,010 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 20:07:06,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:06,010 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 20:07:06,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:07:06,010 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 20:07:06,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:06,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1922089503, now seen corresponding path program 5 times [2024-06-27 20:07:06,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:06,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318226196] [2024-06-27 20:07:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:06,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318226196] [2024-06-27 20:07:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318226196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:06,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418466031] [2024-06-27 20:07:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:06,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:06,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 381 transitions, 4231 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 20:07:06,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:06,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:06,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:08,202 INFO L124 PetriNetUnfolderBase]: 4274/6541 cut-off events. [2024-06-27 20:07:08,202 INFO L125 PetriNetUnfolderBase]: For 1662060/1662077 co-relation queries the response was YES. [2024-06-27 20:07:08,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70660 conditions, 6541 events. 4274/6541 cut-off events. For 1662060/1662077 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36188 event pairs, 1045 based on Foata normal form. 3/6474 useless extension candidates. Maximal degree in co-relation 70509. Up to 6269 conditions per place. [2024-06-27 20:07:08,297 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 339 selfloop transitions, 19 changer transitions 0/391 dead transitions. [2024-06-27 20:07:08,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 391 transitions, 4971 flow [2024-06-27 20:07:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:07:08,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38870431893687707 [2024-06-27 20:07:08,298 INFO L175 Difference]: Start difference. First operand has 330 places, 381 transitions, 4231 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:07:08,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 391 transitions, 4971 flow [2024-06-27 20:07:10,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 391 transitions, 4839 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-27 20:07:10,770 INFO L231 Difference]: Finished difference. Result has 328 places, 381 transitions, 4143 flow [2024-06-27 20:07:10,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4099, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4143, PETRI_PLACES=328, PETRI_TRANSITIONS=381} [2024-06-27 20:07:10,771 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-27 20:07:10,771 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 381 transitions, 4143 flow [2024-06-27 20:07:10,771 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 20:07:10,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:10,771 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 20:07:10,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:07:10,771 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 20:07:10,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:10,771 INFO L85 PathProgramCache]: Analyzing trace with hash 920088903, now seen corresponding path program 6 times [2024-06-27 20:07:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:10,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770484064] [2024-06-27 20:07:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:11,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770484064] [2024-06-27 20:07:11,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770484064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:11,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:11,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017665939] [2024-06-27 20:07:11,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:11,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:11,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:11,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:11,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:11,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:11,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 381 transitions, 4143 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 20:07:11,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:11,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:11,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:13,007 INFO L124 PetriNetUnfolderBase]: 4267/6533 cut-off events. [2024-06-27 20:07:13,007 INFO L125 PetriNetUnfolderBase]: For 1655319/1655336 co-relation queries the response was YES. [2024-06-27 20:07:13,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70247 conditions, 6533 events. 4267/6533 cut-off events. For 1655319/1655336 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 36179 event pairs, 1041 based on Foata normal form. 3/6466 useless extension candidates. Maximal degree in co-relation 70095. Up to 6256 conditions per place. [2024-06-27 20:07:13,105 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 331 selfloop transitions, 27 changer transitions 0/391 dead transitions. [2024-06-27 20:07:13,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 391 transitions, 4883 flow [2024-06-27 20:07:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:07:13,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-27 20:07:13,107 INFO L175 Difference]: Start difference. First operand has 328 places, 381 transitions, 4143 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:07:13,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 391 transitions, 4883 flow [2024-06-27 20:07:15,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 391 transitions, 4823 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:15,859 INFO L231 Difference]: Finished difference. Result has 330 places, 381 transitions, 4143 flow [2024-06-27 20:07:15,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4143, PETRI_PLACES=330, PETRI_TRANSITIONS=381} [2024-06-27 20:07:15,860 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 286 predicate places. [2024-06-27 20:07:15,860 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 381 transitions, 4143 flow [2024-06-27 20:07:15,860 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 20:07:15,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:15,861 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 20:07:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:07:15,861 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 20:07:15,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1929714015, now seen corresponding path program 4 times [2024-06-27 20:07:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:15,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773362779] [2024-06-27 20:07:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:15,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:16,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:16,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773362779] [2024-06-27 20:07:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773362779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:16,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:16,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940088299] [2024-06-27 20:07:16,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:16,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:16,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:16,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:16,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:16,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 381 transitions, 4143 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 20:07:16,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:16,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:16,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:18,287 INFO L124 PetriNetUnfolderBase]: 4341/6654 cut-off events. [2024-06-27 20:07:18,287 INFO L125 PetriNetUnfolderBase]: For 1673503/1673508 co-relation queries the response was YES. [2024-06-27 20:07:18,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69903 conditions, 6654 events. 4341/6654 cut-off events. For 1673503/1673508 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36897 event pairs, 1096 based on Foata normal form. 2/6649 useless extension candidates. Maximal degree in co-relation 69750. Up to 6311 conditions per place. [2024-06-27 20:07:18,380 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 333 selfloop transitions, 17 changer transitions 0/392 dead transitions. [2024-06-27 20:07:18,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 392 transitions, 4869 flow [2024-06-27 20:07:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:07:18,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-27 20:07:18,382 INFO L175 Difference]: Start difference. First operand has 330 places, 381 transitions, 4143 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:07:18,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 392 transitions, 4869 flow [2024-06-27 20:07:21,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 392 transitions, 4745 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 20:07:21,187 INFO L231 Difference]: Finished difference. Result has 329 places, 381 transitions, 4059 flow [2024-06-27 20:07:21,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4059, PETRI_PLACES=329, PETRI_TRANSITIONS=381} [2024-06-27 20:07:21,187 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:07:21,188 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 381 transitions, 4059 flow [2024-06-27 20:07:21,188 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 20:07:21,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:21,188 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 20:07:21,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:07:21,188 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 20:07:21,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1929713612, now seen corresponding path program 4 times [2024-06-27 20:07:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:21,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588045001] [2024-06-27 20:07:21,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:22,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588045001] [2024-06-27 20:07:22,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588045001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:22,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:22,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:22,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259751542] [2024-06-27 20:07:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:22,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:22,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:22,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:22,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:22,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:22,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 381 transitions, 4059 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 20:07:22,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:22,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:22,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:23,581 INFO L124 PetriNetUnfolderBase]: 4344/6663 cut-off events. [2024-06-27 20:07:23,581 INFO L125 PetriNetUnfolderBase]: For 1708365/1708365 co-relation queries the response was YES. [2024-06-27 20:07:23,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69911 conditions, 6663 events. 4344/6663 cut-off events. For 1708365/1708365 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 36988 event pairs, 1094 based on Foata normal form. 3/6666 useless extension candidates. Maximal degree in co-relation 69759. Up to 6269 conditions per place. [2024-06-27 20:07:23,891 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 333 selfloop transitions, 27 changer transitions 0/402 dead transitions. [2024-06-27 20:07:23,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 402 transitions, 5098 flow [2024-06-27 20:07:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:07:23,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 20:07:23,892 INFO L175 Difference]: Start difference. First operand has 329 places, 381 transitions, 4059 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:07:23,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 402 transitions, 5098 flow [2024-06-27 20:07:26,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 402 transitions, 5004 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:07:26,349 INFO L231 Difference]: Finished difference. Result has 328 places, 384 transitions, 4086 flow [2024-06-27 20:07:26,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4086, PETRI_PLACES=328, PETRI_TRANSITIONS=384} [2024-06-27 20:07:26,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-27 20:07:26,349 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 384 transitions, 4086 flow [2024-06-27 20:07:26,350 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 20:07:26,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:26,350 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 20:07:26,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:07:26,350 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 20:07:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1914968462, now seen corresponding path program 5 times [2024-06-27 20:07:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:26,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108608501] [2024-06-27 20:07:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:27,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:27,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108608501] [2024-06-27 20:07:27,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108608501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:27,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:27,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:27,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061269218] [2024-06-27 20:07:27,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:27,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:27,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:27,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:27,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 384 transitions, 4086 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 20:07:27,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:27,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:27,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:28,734 INFO L124 PetriNetUnfolderBase]: 4359/6684 cut-off events. [2024-06-27 20:07:28,734 INFO L125 PetriNetUnfolderBase]: For 1739035/1739035 co-relation queries the response was YES. [2024-06-27 20:07:28,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70431 conditions, 6684 events. 4359/6684 cut-off events. For 1739035/1739035 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 37065 event pairs, 1102 based on Foata normal form. 3/6687 useless extension candidates. Maximal degree in co-relation 70278. Up to 6325 conditions per place. [2024-06-27 20:07:28,834 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 343 selfloop transitions, 17 changer transitions 0/402 dead transitions. [2024-06-27 20:07:28,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 402 transitions, 4911 flow [2024-06-27 20:07:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:28,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:07:28,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-27 20:07:28,835 INFO L175 Difference]: Start difference. First operand has 328 places, 384 transitions, 4086 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:07:28,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 402 transitions, 4911 flow [2024-06-27 20:07:31,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 402 transitions, 4765 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:31,565 INFO L231 Difference]: Finished difference. Result has 329 places, 387 transitions, 4053 flow [2024-06-27 20:07:31,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4053, PETRI_PLACES=329, PETRI_TRANSITIONS=387} [2024-06-27 20:07:31,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 285 predicate places. [2024-06-27 20:07:31,565 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 387 transitions, 4053 flow [2024-06-27 20:07:31,565 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 20:07:31,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:31,566 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 20:07:31,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:07:31,566 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 20:07:31,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:31,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1914463007, now seen corresponding path program 1 times [2024-06-27 20:07:31,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:31,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985695301] [2024-06-27 20:07:31,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:31,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:32,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:32,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985695301] [2024-06-27 20:07:32,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985695301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:32,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:32,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:32,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607200726] [2024-06-27 20:07:32,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:32,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:32,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:32,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:32,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:32,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:07:32,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 387 transitions, 4053 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:32,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:32,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:07:32,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:33,889 INFO L124 PetriNetUnfolderBase]: 4001/6274 cut-off events. [2024-06-27 20:07:33,889 INFO L125 PetriNetUnfolderBase]: For 1746528/1746543 co-relation queries the response was YES. [2024-06-27 20:07:33,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68221 conditions, 6274 events. 4001/6274 cut-off events. For 1746528/1746543 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35836 event pairs, 1011 based on Foata normal form. 2/6256 useless extension candidates. Maximal degree in co-relation 68067. Up to 5733 conditions per place. [2024-06-27 20:07:33,983 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 17 changer transitions 0/403 dead transitions. [2024-06-27 20:07:33,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 403 transitions, 4801 flow [2024-06-27 20:07:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:33,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:33,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 20:07:33,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-27 20:07:33,984 INFO L175 Difference]: Start difference. First operand has 329 places, 387 transitions, 4053 flow. Second operand 8 states and 137 transitions. [2024-06-27 20:07:33,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 403 transitions, 4801 flow [2024-06-27 20:07:36,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 403 transitions, 4727 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:36,348 INFO L231 Difference]: Finished difference. Result has 331 places, 390 transitions, 4085 flow [2024-06-27 20:07:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3979, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4085, PETRI_PLACES=331, PETRI_TRANSITIONS=390} [2024-06-27 20:07:36,349 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-27 20:07:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 390 transitions, 4085 flow [2024-06-27 20:07:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:36,349 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 20:07:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:07:36,349 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 20:07:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1565262128, now seen corresponding path program 6 times [2024-06-27 20:07:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517501167] [2024-06-27 20:07:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517501167] [2024-06-27 20:07:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517501167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:37,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:37,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:37,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22383008] [2024-06-27 20:07:37,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:37,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:37,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:37,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:37,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:37,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:37,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 390 transitions, 4085 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 20:07:37,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:37,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:37,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:38,810 INFO L124 PetriNetUnfolderBase]: 4344/6664 cut-off events. [2024-06-27 20:07:38,811 INFO L125 PetriNetUnfolderBase]: For 1765235/1765235 co-relation queries the response was YES. [2024-06-27 20:07:38,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70302 conditions, 6664 events. 4344/6664 cut-off events. For 1765235/1765235 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36913 event pairs, 1097 based on Foata normal form. 3/6667 useless extension candidates. Maximal degree in co-relation 70147. Up to 6268 conditions per place. [2024-06-27 20:07:38,904 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 336 selfloop transitions, 29 changer transitions 0/407 dead transitions. [2024-06-27 20:07:38,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 407 transitions, 4859 flow [2024-06-27 20:07:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:07:38,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 20:07:38,905 INFO L175 Difference]: Start difference. First operand has 331 places, 390 transitions, 4085 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:07:38,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 407 transitions, 4859 flow [2024-06-27 20:07:42,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 407 transitions, 4731 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:42,049 INFO L231 Difference]: Finished difference. Result has 333 places, 390 transitions, 4021 flow [2024-06-27 20:07:42,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3957, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4021, PETRI_PLACES=333, PETRI_TRANSITIONS=390} [2024-06-27 20:07:42,050 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-27 20:07:42,050 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 390 transitions, 4021 flow [2024-06-27 20:07:42,050 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 20:07:42,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:42,050 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 20:07:42,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:07:42,050 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 20:07:42,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:42,051 INFO L85 PathProgramCache]: Analyzing trace with hash 376629318, now seen corresponding path program 1 times [2024-06-27 20:07:42,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:42,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717436512] [2024-06-27 20:07:42,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:42,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:42,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:42,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:42,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717436512] [2024-06-27 20:07:42,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717436512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:42,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:42,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:42,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133874858] [2024-06-27 20:07:42,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:42,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:42,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:42,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:42,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:42,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:42,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 390 transitions, 4021 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 20:07:42,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:42,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:42,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:44,683 INFO L124 PetriNetUnfolderBase]: 4306/6588 cut-off events. [2024-06-27 20:07:44,684 INFO L125 PetriNetUnfolderBase]: For 1821102/1821117 co-relation queries the response was YES. [2024-06-27 20:07:44,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71221 conditions, 6588 events. 4306/6588 cut-off events. For 1821102/1821117 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36421 event pairs, 1040 based on Foata normal form. 6/6524 useless extension candidates. Maximal degree in co-relation 71065. Up to 6274 conditions per place. [2024-06-27 20:07:44,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 360 selfloop transitions, 19 changer transitions 0/414 dead transitions. [2024-06-27 20:07:44,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 414 transitions, 4901 flow [2024-06-27 20:07:44,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:07:44,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-27 20:07:44,768 INFO L175 Difference]: Start difference. First operand has 333 places, 390 transitions, 4021 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:07:44,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 414 transitions, 4901 flow [2024-06-27 20:07:47,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 414 transitions, 4823 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:47,634 INFO L231 Difference]: Finished difference. Result has 334 places, 393 transitions, 4059 flow [2024-06-27 20:07:47,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4059, PETRI_PLACES=334, PETRI_TRANSITIONS=393} [2024-06-27 20:07:47,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-27 20:07:47,635 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 393 transitions, 4059 flow [2024-06-27 20:07:47,635 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 20:07:47,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:47,635 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 20:07:47,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:07:47,635 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 20:07:47,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 376779048, now seen corresponding path program 2 times [2024-06-27 20:07:47,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:47,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790748900] [2024-06-27 20:07:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:48,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790748900] [2024-06-27 20:07:48,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790748900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:48,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:48,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166974183] [2024-06-27 20:07:48,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:48,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:48,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:48,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 393 transitions, 4059 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 20:07:48,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:48,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:48,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:50,306 INFO L124 PetriNetUnfolderBase]: 4378/6690 cut-off events. [2024-06-27 20:07:50,306 INFO L125 PetriNetUnfolderBase]: For 1891241/1891256 co-relation queries the response was YES. [2024-06-27 20:07:50,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73392 conditions, 6690 events. 4378/6690 cut-off events. For 1891241/1891256 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 37049 event pairs, 1051 based on Foata normal form. 6/6626 useless extension candidates. Maximal degree in co-relation 73235. Up to 6209 conditions per place. [2024-06-27 20:07:50,414 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 346 selfloop transitions, 48 changer transitions 0/429 dead transitions. [2024-06-27 20:07:50,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 429 transitions, 5581 flow [2024-06-27 20:07:50,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:50,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:07:50,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:07:50,415 INFO L175 Difference]: Start difference. First operand has 334 places, 393 transitions, 4059 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:07:50,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 429 transitions, 5581 flow [2024-06-27 20:07:53,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 429 transitions, 5487 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:53,659 INFO L231 Difference]: Finished difference. Result has 336 places, 402 transitions, 4289 flow [2024-06-27 20:07:53,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4289, PETRI_PLACES=336, PETRI_TRANSITIONS=402} [2024-06-27 20:07:53,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 292 predicate places. [2024-06-27 20:07:53,660 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 402 transitions, 4289 flow [2024-06-27 20:07:53,660 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 20:07:53,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:53,660 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 20:07:53,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:07:53,660 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 20:07:53,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash 376773468, now seen corresponding path program 3 times [2024-06-27 20:07:53,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:53,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175384349] [2024-06-27 20:07:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:53,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:54,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:54,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175384349] [2024-06-27 20:07:54,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175384349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:54,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:54,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:54,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117775720] [2024-06-27 20:07:54,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:54,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:54,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:54,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:54,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:54,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 402 transitions, 4289 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 20:07:54,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:54,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:54,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:56,459 INFO L124 PetriNetUnfolderBase]: 4360/6666 cut-off events. [2024-06-27 20:07:56,460 INFO L125 PetriNetUnfolderBase]: For 1889020/1889035 co-relation queries the response was YES. [2024-06-27 20:07:56,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73161 conditions, 6666 events. 4360/6666 cut-off events. For 1889020/1889035 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 36923 event pairs, 1047 based on Foata normal form. 6/6602 useless extension candidates. Maximal degree in co-relation 73003. Up to 6198 conditions per place. [2024-06-27 20:07:56,553 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 348 selfloop transitions, 47 changer transitions 0/430 dead transitions. [2024-06-27 20:07:56,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 430 transitions, 5381 flow [2024-06-27 20:07:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 20:07:56,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-27 20:07:56,554 INFO L175 Difference]: Start difference. First operand has 336 places, 402 transitions, 4289 flow. Second operand 8 states and 154 transitions. [2024-06-27 20:07:56,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 430 transitions, 5381 flow [2024-06-27 20:07:59,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 430 transitions, 5230 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:59,006 INFO L231 Difference]: Finished difference. Result has 341 places, 402 transitions, 4238 flow [2024-06-27 20:07:59,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4138, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4238, PETRI_PLACES=341, PETRI_TRANSITIONS=402} [2024-06-27 20:07:59,007 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 297 predicate places. [2024-06-27 20:07:59,007 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 402 transitions, 4238 flow [2024-06-27 20:07:59,007 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 20:07:59,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:59,007 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 20:07:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:07:59,007 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 20:07:59,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:59,007 INFO L85 PathProgramCache]: Analyzing trace with hash 70947574, now seen corresponding path program 4 times [2024-06-27 20:07:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:59,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333865961] [2024-06-27 20:07:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:59,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:59,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333865961] [2024-06-27 20:07:59,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333865961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:59,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:59,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587428374] [2024-06-27 20:07:59,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:59,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:59,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:59,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:07:59,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 402 transitions, 4238 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 20:07:59,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:59,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:07:59,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:01,663 INFO L124 PetriNetUnfolderBase]: 4438/6776 cut-off events. [2024-06-27 20:08:01,663 INFO L125 PetriNetUnfolderBase]: For 1960285/1960302 co-relation queries the response was YES. [2024-06-27 20:08:01,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74806 conditions, 6776 events. 4438/6776 cut-off events. For 1960285/1960302 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 37588 event pairs, 1073 based on Foata normal form. 6/6712 useless extension candidates. Maximal degree in co-relation 74646. Up to 6253 conditions per place. [2024-06-27 20:08:01,777 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 345 selfloop transitions, 53 changer transitions 0/433 dead transitions. [2024-06-27 20:08:01,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 433 transitions, 5712 flow [2024-06-27 20:08:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:08:01,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-27 20:08:01,778 INFO L175 Difference]: Start difference. First operand has 341 places, 402 transitions, 4238 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:08:01,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 433 transitions, 5712 flow [2024-06-27 20:08:04,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 433 transitions, 5588 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:04,937 INFO L231 Difference]: Finished difference. Result has 342 places, 408 transitions, 4382 flow [2024-06-27 20:08:04,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4382, PETRI_PLACES=342, PETRI_TRANSITIONS=408} [2024-06-27 20:08:04,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-27 20:08:04,937 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 408 transitions, 4382 flow [2024-06-27 20:08:04,938 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 20:08:04,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:04,938 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 20:08:04,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:08:04,938 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 20:08:04,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:04,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1573090682, now seen corresponding path program 5 times [2024-06-27 20:08:04,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:04,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327039985] [2024-06-27 20:08:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:04,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:05,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:05,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327039985] [2024-06-27 20:08:05,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327039985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:05,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416082207] [2024-06-27 20:08:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:05,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:05,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:05,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:05,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:05,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 408 transitions, 4382 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 20:08:05,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:05,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:05,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:07,750 INFO L124 PetriNetUnfolderBase]: 4420/6752 cut-off events. [2024-06-27 20:08:07,751 INFO L125 PetriNetUnfolderBase]: For 1952935/1952952 co-relation queries the response was YES. [2024-06-27 20:08:07,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74190 conditions, 6752 events. 4420/6752 cut-off events. For 1952935/1952952 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 37413 event pairs, 1060 based on Foata normal form. 6/6688 useless extension candidates. Maximal degree in co-relation 74029. Up to 6242 conditions per place. [2024-06-27 20:08:07,848 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 338 selfloop transitions, 56 changer transitions 0/429 dead transitions. [2024-06-27 20:08:07,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 429 transitions, 5456 flow [2024-06-27 20:08:07,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:07,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:08:07,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 20:08:07,850 INFO L175 Difference]: Start difference. First operand has 342 places, 408 transitions, 4382 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:08:07,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 429 transitions, 5456 flow [2024-06-27 20:08:11,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 429 transitions, 5222 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:11,134 INFO L231 Difference]: Finished difference. Result has 345 places, 408 transitions, 4266 flow [2024-06-27 20:08:11,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4148, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4266, PETRI_PLACES=345, PETRI_TRANSITIONS=408} [2024-06-27 20:08:11,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 301 predicate places. [2024-06-27 20:08:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 408 transitions, 4266 flow [2024-06-27 20:08:11,134 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 20:08:11,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:11,134 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 20:08:11,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:08:11,135 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 20:08:11,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:11,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1922079428, now seen corresponding path program 6 times [2024-06-27 20:08:11,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:11,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593519448] [2024-06-27 20:08:11,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:11,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:11,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:11,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593519448] [2024-06-27 20:08:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593519448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:11,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891913566] [2024-06-27 20:08:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:11,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:11,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:11,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:12,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:12,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 408 transitions, 4266 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 20:08:12,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:12,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:12,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:13,677 INFO L124 PetriNetUnfolderBase]: 4402/6728 cut-off events. [2024-06-27 20:08:13,678 INFO L125 PetriNetUnfolderBase]: For 1940834/1940851 co-relation queries the response was YES. [2024-06-27 20:08:13,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73148 conditions, 6728 events. 4402/6728 cut-off events. For 1940834/1940851 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 37285 event pairs, 1054 based on Foata normal form. 6/6664 useless extension candidates. Maximal degree in co-relation 72986. Up to 6231 conditions per place. [2024-06-27 20:08:13,782 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 54 changer transitions 0/430 dead transitions. [2024-06-27 20:08:13,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 430 transitions, 5118 flow [2024-06-27 20:08:13,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:08:13,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 20:08:13,783 INFO L175 Difference]: Start difference. First operand has 345 places, 408 transitions, 4266 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:08:13,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 430 transitions, 5118 flow [2024-06-27 20:08:17,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 430 transitions, 4947 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:17,135 INFO L231 Difference]: Finished difference. Result has 346 places, 408 transitions, 4209 flow [2024-06-27 20:08:17,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4209, PETRI_PLACES=346, PETRI_TRANSITIONS=408} [2024-06-27 20:08:17,135 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-27 20:08:17,135 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 408 transitions, 4209 flow [2024-06-27 20:08:17,136 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 20:08:17,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:17,136 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 20:08:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:08:17,136 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 20:08:17,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1580517569, now seen corresponding path program 1 times [2024-06-27 20:08:17,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:17,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516078232] [2024-06-27 20:08:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:17,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:18,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:18,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516078232] [2024-06-27 20:08:18,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516078232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:18,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:18,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:18,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381613116] [2024-06-27 20:08:18,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:18,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:18,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:18,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:18,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:18,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-27 20:08:18,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 408 transitions, 4209 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:18,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:18,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-27 20:08:18,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:20,044 INFO L124 PetriNetUnfolderBase]: 4118/6440 cut-off events. [2024-06-27 20:08:20,044 INFO L125 PetriNetUnfolderBase]: For 1916766/1916781 co-relation queries the response was YES. [2024-06-27 20:08:20,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70499 conditions, 6440 events. 4118/6440 cut-off events. For 1916766/1916781 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 36666 event pairs, 1048 based on Foata normal form. 2/6422 useless extension candidates. Maximal degree in co-relation 70336. Up to 5905 conditions per place. [2024-06-27 20:08:20,148 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 333 selfloop transitions, 16 changer transitions 0/423 dead transitions. [2024-06-27 20:08:20,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 423 transitions, 4991 flow [2024-06-27 20:08:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:08:20,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-27 20:08:20,149 INFO L175 Difference]: Start difference. First operand has 346 places, 408 transitions, 4209 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:08:20,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 423 transitions, 4991 flow [2024-06-27 20:08:22,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 423 transitions, 4875 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:22,956 INFO L231 Difference]: Finished difference. Result has 347 places, 410 transitions, 4188 flow [2024-06-27 20:08:22,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4093, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4188, PETRI_PLACES=347, PETRI_TRANSITIONS=410} [2024-06-27 20:08:22,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-27 20:08:22,957 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 410 transitions, 4188 flow [2024-06-27 20:08:22,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:22,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:22,957 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 20:08:22,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:08:22,957 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:22,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:22,958 INFO L85 PathProgramCache]: Analyzing trace with hash -2038063426, now seen corresponding path program 1 times [2024-06-27 20:08:22,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:22,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188042445] [2024-06-27 20:08:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:22,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:24,655 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 20:08:24,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188042445] [2024-06-27 20:08:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188042445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:24,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:24,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:08:24,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666238875] [2024-06-27 20:08:24,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:24,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:08:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:24,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:08:24,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:08:24,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:24,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 410 transitions, 4188 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:24,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:24,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:24,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:26,587 INFO L124 PetriNetUnfolderBase]: 4582/6956 cut-off events. [2024-06-27 20:08:26,587 INFO L125 PetriNetUnfolderBase]: For 1984877/1984883 co-relation queries the response was YES. [2024-06-27 20:08:26,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74428 conditions, 6956 events. 4582/6956 cut-off events. For 1984877/1984883 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 38300 event pairs, 1070 based on Foata normal form. 4/6942 useless extension candidates. Maximal degree in co-relation 74264. Up to 6680 conditions per place. [2024-06-27 20:08:26,692 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 414 selfloop transitions, 25 changer transitions 0/464 dead transitions. [2024-06-27 20:08:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 464 transitions, 5342 flow [2024-06-27 20:08:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:08:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:08:26,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-27 20:08:26,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427061310782241 [2024-06-27 20:08:26,693 INFO L175 Difference]: Start difference. First operand has 347 places, 410 transitions, 4188 flow. Second operand 11 states and 202 transitions. [2024-06-27 20:08:26,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 464 transitions, 5342 flow [2024-06-27 20:08:30,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 464 transitions, 5263 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:30,705 INFO L231 Difference]: Finished difference. Result has 353 places, 415 transitions, 4326 flow [2024-06-27 20:08:30,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4326, PETRI_PLACES=353, PETRI_TRANSITIONS=415} [2024-06-27 20:08:30,705 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 309 predicate places. [2024-06-27 20:08:30,705 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 415 transitions, 4326 flow [2024-06-27 20:08:30,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:30,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:30,706 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 20:08:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:08:30,706 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:30,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:30,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1535962844, now seen corresponding path program 2 times [2024-06-27 20:08:30,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:30,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420719050] [2024-06-27 20:08:30,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:30,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:32,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:32,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420719050] [2024-06-27 20:08:32,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420719050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:32,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:32,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:08:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446697233] [2024-06-27 20:08:32,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:32,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:08:32,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:32,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:08:32,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:08:32,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:32,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 415 transitions, 4326 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:32,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:32,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:32,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:34,290 INFO L124 PetriNetUnfolderBase]: 4621/7021 cut-off events. [2024-06-27 20:08:34,290 INFO L125 PetriNetUnfolderBase]: For 2017013/2017019 co-relation queries the response was YES. [2024-06-27 20:08:34,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75600 conditions, 7021 events. 4621/7021 cut-off events. For 2017013/2017019 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 38653 event pairs, 887 based on Foata normal form. 6/7019 useless extension candidates. Maximal degree in co-relation 75434. Up to 6019 conditions per place. [2024-06-27 20:08:34,398 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 341 selfloop transitions, 107 changer transitions 0/473 dead transitions. [2024-06-27 20:08:34,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 473 transitions, 5537 flow [2024-06-27 20:08:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:08:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:08:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 20:08:34,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45665961945031713 [2024-06-27 20:08:34,399 INFO L175 Difference]: Start difference. First operand has 353 places, 415 transitions, 4326 flow. Second operand 11 states and 216 transitions. [2024-06-27 20:08:34,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 473 transitions, 5537 flow [2024-06-27 20:08:38,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 473 transitions, 5364 flow, removed 64 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:38,311 INFO L231 Difference]: Finished difference. Result has 357 places, 421 transitions, 4545 flow [2024-06-27 20:08:38,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4545, PETRI_PLACES=357, PETRI_TRANSITIONS=421} [2024-06-27 20:08:38,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 313 predicate places. [2024-06-27 20:08:38,312 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 421 transitions, 4545 flow [2024-06-27 20:08:38,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:38,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:38,312 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 20:08:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:08:38,312 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:38,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:38,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1178540912, now seen corresponding path program 3 times [2024-06-27 20:08:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704632946] [2024-06-27 20:08:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:39,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704632946] [2024-06-27 20:08:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704632946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:39,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:08:39,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230256350] [2024-06-27 20:08:39,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:39,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:08:39,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:08:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:08:40,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:40,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 421 transitions, 4545 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:40,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:40,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:40,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:41,671 INFO L124 PetriNetUnfolderBase]: 4638/7048 cut-off events. [2024-06-27 20:08:41,671 INFO L125 PetriNetUnfolderBase]: For 2063359/2063365 co-relation queries the response was YES. [2024-06-27 20:08:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76829 conditions, 7048 events. 4638/7048 cut-off events. For 2063359/2063365 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 38892 event pairs, 877 based on Foata normal form. 6/7046 useless extension candidates. Maximal degree in co-relation 76661. Up to 6046 conditions per place. [2024-06-27 20:08:41,778 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 341 selfloop transitions, 110 changer transitions 0/476 dead transitions. [2024-06-27 20:08:41,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 476 transitions, 5746 flow [2024-06-27 20:08:41,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:08:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:08:41,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:08:41,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:08:41,780 INFO L175 Difference]: Start difference. First operand has 357 places, 421 transitions, 4545 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:08:41,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 476 transitions, 5746 flow [2024-06-27 20:08:45,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 476 transitions, 5399 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:45,901 INFO L231 Difference]: Finished difference. Result has 360 places, 425 transitions, 4574 flow [2024-06-27 20:08:45,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4574, PETRI_PLACES=360, PETRI_TRANSITIONS=425} [2024-06-27 20:08:45,902 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-27 20:08:45,902 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 425 transitions, 4574 flow [2024-06-27 20:08:45,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:45,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:45,902 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 20:08:45,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:08:45,902 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:45,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:45,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1178548352, now seen corresponding path program 4 times [2024-06-27 20:08:45,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:45,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301386699] [2024-06-27 20:08:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:45,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:47,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:47,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301386699] [2024-06-27 20:08:47,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301386699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:47,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:47,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:08:47,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545179133] [2024-06-27 20:08:47,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:47,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:08:47,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:47,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:08:47,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:08:47,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:47,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 425 transitions, 4574 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:47,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:47,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:47,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:49,722 INFO L124 PetriNetUnfolderBase]: 4662/7082 cut-off events. [2024-06-27 20:08:49,723 INFO L125 PetriNetUnfolderBase]: For 2111600/2111606 co-relation queries the response was YES. [2024-06-27 20:08:49,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77587 conditions, 7082 events. 4662/7082 cut-off events. For 2111600/2111606 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 39103 event pairs, 883 based on Foata normal form. 6/7072 useless extension candidates. Maximal degree in co-relation 77418. Up to 6007 conditions per place. [2024-06-27 20:08:49,833 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 336 selfloop transitions, 117 changer transitions 0/478 dead transitions. [2024-06-27 20:08:49,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 478 transitions, 5762 flow [2024-06-27 20:08:49,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:08:49,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:08:49,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:08:49,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:08:49,834 INFO L175 Difference]: Start difference. First operand has 360 places, 425 transitions, 4574 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:08:49,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 478 transitions, 5762 flow [2024-06-27 20:08:53,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 478 transitions, 5437 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:53,437 INFO L231 Difference]: Finished difference. Result has 364 places, 427 transitions, 4624 flow [2024-06-27 20:08:53,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4624, PETRI_PLACES=364, PETRI_TRANSITIONS=427} [2024-06-27 20:08:53,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 20:08:53,437 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 427 transitions, 4624 flow [2024-06-27 20:08:53,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:53,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:53,437 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 20:08:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:08:53,437 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 20:08:53,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:53,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1364811947, now seen corresponding path program 1 times [2024-06-27 20:08:53,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:53,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856790583] [2024-06-27 20:08:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:54,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856790583] [2024-06-27 20:08:54,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856790583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:54,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:54,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:54,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345477516] [2024-06-27 20:08:54,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:54,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:54,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:54,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:08:54,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 427 transitions, 4624 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 20:08:54,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:54,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:08:54,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:56,319 INFO L124 PetriNetUnfolderBase]: 4592/7022 cut-off events. [2024-06-27 20:08:56,319 INFO L125 PetriNetUnfolderBase]: For 2164779/2164849 co-relation queries the response was YES. [2024-06-27 20:08:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77158 conditions, 7022 events. 4592/7022 cut-off events. For 2164779/2164849 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 39359 event pairs, 1085 based on Foata normal form. 6/7004 useless extension candidates. Maximal degree in co-relation 76988. Up to 6435 conditions per place. [2024-06-27 20:08:56,425 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 360 selfloop transitions, 70 changer transitions 0/472 dead transitions. [2024-06-27 20:08:56,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 472 transitions, 5964 flow [2024-06-27 20:08:56,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:08:56,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45478036175710596 [2024-06-27 20:08:56,426 INFO L175 Difference]: Start difference. First operand has 364 places, 427 transitions, 4624 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:08:56,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 472 transitions, 5964 flow [2024-06-27 20:08:59,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 472 transitions, 5607 flow, removed 63 selfloop flow, removed 9 redundant places. [2024-06-27 20:08:59,725 INFO L231 Difference]: Finished difference. Result has 364 places, 433 transitions, 4555 flow [2024-06-27 20:08:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4267, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4555, PETRI_PLACES=364, PETRI_TRANSITIONS=433} [2024-06-27 20:08:59,725 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-27 20:08:59,725 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 433 transitions, 4555 flow [2024-06-27 20:08:59,725 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 20:08:59,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:59,725 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 20:08:59,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:08:59,725 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 20:08:59,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -711519441, now seen corresponding path program 1 times [2024-06-27 20:08:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:59,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72118726] [2024-06-27 20:08:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:59,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:00,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72118726] [2024-06-27 20:09:00,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72118726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:00,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:00,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:00,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141074662] [2024-06-27 20:09:00,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:00,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:00,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:00,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:00,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 433 transitions, 4555 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 20:09:00,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:00,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:00,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:02,492 INFO L124 PetriNetUnfolderBase]: 4864/7316 cut-off events. [2024-06-27 20:09:02,493 INFO L125 PetriNetUnfolderBase]: For 2175278/2175280 co-relation queries the response was YES. [2024-06-27 20:09:02,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80025 conditions, 7316 events. 4864/7316 cut-off events. For 2175278/2175280 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 39918 event pairs, 1132 based on Foata normal form. 3/7319 useless extension candidates. Maximal degree in co-relation 79854. Up to 7148 conditions per place. [2024-06-27 20:09:02,599 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 67 changer transitions 0/470 dead transitions. [2024-06-27 20:09:02,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 470 transitions, 6251 flow [2024-06-27 20:09:02,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-27 20:09:02,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-27 20:09:02,600 INFO L175 Difference]: Start difference. First operand has 364 places, 433 transitions, 4555 flow. Second operand 8 states and 145 transitions. [2024-06-27 20:09:02,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 470 transitions, 6251 flow [2024-06-27 20:09:05,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 470 transitions, 6108 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:05,543 INFO L231 Difference]: Finished difference. Result has 367 places, 442 transitions, 4762 flow [2024-06-27 20:09:05,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4762, PETRI_PLACES=367, PETRI_TRANSITIONS=442} [2024-06-27 20:09:05,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-27 20:09:05,543 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 442 transitions, 4762 flow [2024-06-27 20:09:05,543 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 20:09:05,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:05,543 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 20:09:05,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:09:05,544 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 20:09:05,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -89300023, now seen corresponding path program 2 times [2024-06-27 20:09:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813756764] [2024-06-27 20:09:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813756764] [2024-06-27 20:09:06,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813756764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:06,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:06,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579757096] [2024-06-27 20:09:06,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:06,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:06,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:06,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:09:06,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 442 transitions, 4762 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 20:09:06,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:06,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:09:06,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:08,383 INFO L124 PetriNetUnfolderBase]: 4877/7334 cut-off events. [2024-06-27 20:09:08,384 INFO L125 PetriNetUnfolderBase]: For 2218992/2218994 co-relation queries the response was YES. [2024-06-27 20:09:08,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80879 conditions, 7334 events. 4877/7334 cut-off events. For 2218992/2218994 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39979 event pairs, 1122 based on Foata normal form. 3/7337 useless extension candidates. Maximal degree in co-relation 80706. Up to 7163 conditions per place. [2024-06-27 20:09:08,484 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 397 selfloop transitions, 73 changer transitions 0/473 dead transitions. [2024-06-27 20:09:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 473 transitions, 6404 flow [2024-06-27 20:09:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:09:08,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-27 20:09:08,485 INFO L175 Difference]: Start difference. First operand has 367 places, 442 transitions, 4762 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:09:08,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 473 transitions, 6404 flow [2024-06-27 20:09:13,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 473 transitions, 6184 flow, removed 87 selfloop flow, removed 3 redundant places. [2024-06-27 20:09:13,198 INFO L231 Difference]: Finished difference. Result has 372 places, 448 transitions, 4842 flow [2024-06-27 20:09:13,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4598, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4842, PETRI_PLACES=372, PETRI_TRANSITIONS=448} [2024-06-27 20:09:13,199 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-27 20:09:13,199 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 448 transitions, 4842 flow [2024-06-27 20:09:13,199 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 20:09:13,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:13,199 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 20:09:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:09:13,199 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:13,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:13,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1228793708, now seen corresponding path program 5 times [2024-06-27 20:09:13,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:13,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239076893] [2024-06-27 20:09:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:13,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:14,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239076893] [2024-06-27 20:09:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239076893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:14,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:14,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:09:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148400833] [2024-06-27 20:09:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:09:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:14,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:09:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:09:14,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:14,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 448 transitions, 4842 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:14,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:14,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:14,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:16,820 INFO L124 PetriNetUnfolderBase]: 4780/7252 cut-off events. [2024-06-27 20:09:16,821 INFO L125 PetriNetUnfolderBase]: For 2273738/2273768 co-relation queries the response was YES. [2024-06-27 20:09:16,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80868 conditions, 7252 events. 4780/7252 cut-off events. For 2273738/2273768 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 40217 event pairs, 911 based on Foata normal form. 6/7245 useless extension candidates. Maximal degree in co-relation 80693. Up to 6227 conditions per place. [2024-06-27 20:09:16,926 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 364 selfloop transitions, 110 changer transitions 0/504 dead transitions. [2024-06-27 20:09:16,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 504 transitions, 6135 flow [2024-06-27 20:09:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:09:16,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:09:16,927 INFO L175 Difference]: Start difference. First operand has 372 places, 448 transitions, 4842 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:09:16,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 504 transitions, 6135 flow [2024-06-27 20:09:21,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 504 transitions, 6002 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 20:09:21,615 INFO L231 Difference]: Finished difference. Result has 380 places, 456 transitions, 5157 flow [2024-06-27 20:09:21,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4709, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5157, PETRI_PLACES=380, PETRI_TRANSITIONS=456} [2024-06-27 20:09:21,615 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-27 20:09:21,615 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 456 transitions, 5157 flow [2024-06-27 20:09:21,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:21,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:21,615 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 20:09:21,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:09:21,616 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:21,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:21,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1712497714, now seen corresponding path program 6 times [2024-06-27 20:09:21,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:21,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423840460] [2024-06-27 20:09:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:21,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:23,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:23,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423840460] [2024-06-27 20:09:23,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423840460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:23,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:23,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:09:23,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153265414] [2024-06-27 20:09:23,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:23,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:09:23,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:23,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:09:23,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:09:23,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:23,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 456 transitions, 5157 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:23,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:23,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:23,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:25,551 INFO L124 PetriNetUnfolderBase]: 4797/7279 cut-off events. [2024-06-27 20:09:25,551 INFO L125 PetriNetUnfolderBase]: For 2320562/2320592 co-relation queries the response was YES. [2024-06-27 20:09:25,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82343 conditions, 7279 events. 4797/7279 cut-off events. For 2320562/2320592 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 40436 event pairs, 911 based on Foata normal form. 6/7272 useless extension candidates. Maximal degree in co-relation 82166. Up to 6213 conditions per place. [2024-06-27 20:09:25,668 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 363 selfloop transitions, 113 changer transitions 0/506 dead transitions. [2024-06-27 20:09:25,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 506 transitions, 6397 flow [2024-06-27 20:09:25,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:09:25,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:09:25,670 INFO L175 Difference]: Start difference. First operand has 380 places, 456 transitions, 5157 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:09:25,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 506 transitions, 6397 flow [2024-06-27 20:09:30,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 506 transitions, 6079 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:30,217 INFO L231 Difference]: Finished difference. Result has 385 places, 458 transitions, 5218 flow [2024-06-27 20:09:30,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4841, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5218, PETRI_PLACES=385, PETRI_TRANSITIONS=458} [2024-06-27 20:09:30,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 341 predicate places. [2024-06-27 20:09:30,217 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 458 transitions, 5218 flow [2024-06-27 20:09:30,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:30,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:30,218 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 20:09:30,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:09:30,218 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:30,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2075224366, now seen corresponding path program 7 times [2024-06-27 20:09:30,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:30,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493258943] [2024-06-27 20:09:30,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:30,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493258943] [2024-06-27 20:09:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493258943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:09:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99418950] [2024-06-27 20:09:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:31,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:09:31,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:09:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:09:31,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:31,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 458 transitions, 5218 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:31,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:31,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:31,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:33,747 INFO L124 PetriNetUnfolderBase]: 4850/7356 cut-off events. [2024-06-27 20:09:33,747 INFO L125 PetriNetUnfolderBase]: For 2408836/2408866 co-relation queries the response was YES. [2024-06-27 20:09:33,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84119 conditions, 7356 events. 4850/7356 cut-off events. For 2408836/2408866 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41023 event pairs, 902 based on Foata normal form. 6/7336 useless extension candidates. Maximal degree in co-relation 83941. Up to 6085 conditions per place. [2024-06-27 20:09:33,871 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 353 selfloop transitions, 129 changer transitions 0/512 dead transitions. [2024-06-27 20:09:33,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 512 transitions, 7032 flow [2024-06-27 20:09:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:09:33,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:09:33,873 INFO L175 Difference]: Start difference. First operand has 385 places, 458 transitions, 5218 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:09:33,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 512 transitions, 7032 flow [2024-06-27 20:09:37,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 512 transitions, 6673 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 20:09:37,755 INFO L231 Difference]: Finished difference. Result has 387 places, 462 transitions, 5416 flow [2024-06-27 20:09:37,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4859, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5416, PETRI_PLACES=387, PETRI_TRANSITIONS=462} [2024-06-27 20:09:37,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-27 20:09:37,756 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 462 transitions, 5416 flow [2024-06-27 20:09:37,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:37,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:37,756 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 20:09:37,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:09:37,757 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:37,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:37,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2012822580, now seen corresponding path program 8 times [2024-06-27 20:09:37,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:37,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375837637] [2024-06-27 20:09:37,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:37,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:39,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:39,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375837637] [2024-06-27 20:09:39,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375837637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:39,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:39,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:09:39,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966372330] [2024-06-27 20:09:39,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:39,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:09:39,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:39,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:09:39,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:09:39,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:39,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 462 transitions, 5416 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:39,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:39,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:39,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:41,517 INFO L124 PetriNetUnfolderBase]: 4878/7404 cut-off events. [2024-06-27 20:09:41,517 INFO L125 PetriNetUnfolderBase]: For 2425281/2425311 co-relation queries the response was YES. [2024-06-27 20:09:41,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84513 conditions, 7404 events. 4878/7404 cut-off events. For 2425281/2425311 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 41301 event pairs, 918 based on Foata normal form. 6/7397 useless extension candidates. Maximal degree in co-relation 84334. Up to 6366 conditions per place. [2024-06-27 20:09:41,639 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 375 selfloop transitions, 111 changer transitions 0/516 dead transitions. [2024-06-27 20:09:41,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 516 transitions, 6720 flow [2024-06-27 20:09:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:09:41,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:09:41,641 INFO L175 Difference]: Start difference. First operand has 387 places, 462 transitions, 5416 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:09:41,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 516 transitions, 6720 flow [2024-06-27 20:09:46,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 516 transitions, 6385 flow, removed 102 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:46,844 INFO L231 Difference]: Finished difference. Result has 391 places, 467 transitions, 5494 flow [2024-06-27 20:09:46,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5494, PETRI_PLACES=391, PETRI_TRANSITIONS=467} [2024-06-27 20:09:46,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-27 20:09:46,845 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 467 transitions, 5494 flow [2024-06-27 20:09:46,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:46,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:46,845 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 20:09:46,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:09:46,846 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:46,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:46,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1913594404, now seen corresponding path program 9 times [2024-06-27 20:09:46,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:46,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415337733] [2024-06-27 20:09:46,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:46,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:48,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:48,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415337733] [2024-06-27 20:09:48,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415337733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:48,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:48,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:09:48,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572160736] [2024-06-27 20:09:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:48,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:09:48,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:48,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:09:48,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:09:48,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:48,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 467 transitions, 5494 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:48,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:48,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:50,719 INFO L124 PetriNetUnfolderBase]: 4895/7431 cut-off events. [2024-06-27 20:09:50,719 INFO L125 PetriNetUnfolderBase]: For 2453961/2453991 co-relation queries the response was YES. [2024-06-27 20:09:50,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85059 conditions, 7431 events. 4895/7431 cut-off events. For 2453961/2453991 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 41488 event pairs, 938 based on Foata normal form. 6/7424 useless extension candidates. Maximal degree in co-relation 84878. Up to 6393 conditions per place. [2024-06-27 20:09:50,845 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 378 selfloop transitions, 110 changer transitions 0/518 dead transitions. [2024-06-27 20:09:50,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 518 transitions, 6742 flow [2024-06-27 20:09:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:50,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:50,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:09:50,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:09:50,846 INFO L175 Difference]: Start difference. First operand has 391 places, 467 transitions, 5494 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:09:50,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 518 transitions, 6742 flow [2024-06-27 20:09:55,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 518 transitions, 6405 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-27 20:09:55,454 INFO L231 Difference]: Finished difference. Result has 393 places, 469 transitions, 5508 flow [2024-06-27 20:09:55,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5508, PETRI_PLACES=393, PETRI_TRANSITIONS=469} [2024-06-27 20:09:55,454 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-27 20:09:55,455 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 469 transitions, 5508 flow [2024-06-27 20:09:55,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:55,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:55,455 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 20:09:55,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:09:55,455 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:55,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:55,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1913586964, now seen corresponding path program 10 times [2024-06-27 20:09:55,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:55,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216253238] [2024-06-27 20:09:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:55,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:57,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:57,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216253238] [2024-06-27 20:09:57,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216253238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:57,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:57,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:09:57,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120692951] [2024-06-27 20:09:57,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:57,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:09:57,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:09:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:09:57,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:09:57,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 469 transitions, 5508 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:57,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:57,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:09:57,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:59,240 INFO L124 PetriNetUnfolderBase]: 4887/7419 cut-off events. [2024-06-27 20:09:59,240 INFO L125 PetriNetUnfolderBase]: For 2462402/2462432 co-relation queries the response was YES. [2024-06-27 20:09:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84492 conditions, 7419 events. 4887/7419 cut-off events. For 2462402/2462432 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 41373 event pairs, 946 based on Foata normal form. 6/7412 useless extension candidates. Maximal degree in co-relation 84311. Up to 6322 conditions per place. [2024-06-27 20:09:59,366 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 373 selfloop transitions, 115 changer transitions 0/518 dead transitions. [2024-06-27 20:09:59,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 518 transitions, 6634 flow [2024-06-27 20:09:59,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:09:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:09:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:09:59,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:09:59,367 INFO L175 Difference]: Start difference. First operand has 393 places, 469 transitions, 5508 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:09:59,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 518 transitions, 6634 flow [2024-06-27 20:10:04,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 518 transitions, 6217 flow, removed 94 selfloop flow, removed 8 redundant places. [2024-06-27 20:10:04,407 INFO L231 Difference]: Finished difference. Result has 396 places, 469 transitions, 5328 flow [2024-06-27 20:10:04,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5328, PETRI_PLACES=396, PETRI_TRANSITIONS=469} [2024-06-27 20:10:04,408 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 352 predicate places. [2024-06-27 20:10:04,408 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 469 transitions, 5328 flow [2024-06-27 20:10:04,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:04,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:04,409 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 20:10:04,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:10:04,409 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 20:10:04,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1354634957, now seen corresponding path program 2 times [2024-06-27 20:10:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474554916] [2024-06-27 20:10:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:05,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:05,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474554916] [2024-06-27 20:10:05,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474554916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:05,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:05,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:05,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072083775] [2024-06-27 20:10:05,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:05,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:05,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:05,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:05,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:05,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:05,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 469 transitions, 5328 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 20:10:05,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:05,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:05,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:07,373 INFO L124 PetriNetUnfolderBase]: 4760/7289 cut-off events. [2024-06-27 20:10:07,373 INFO L125 PetriNetUnfolderBase]: For 2553907/2554042 co-relation queries the response was YES. [2024-06-27 20:10:07,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83949 conditions, 7289 events. 4760/7289 cut-off events. For 2553907/2554042 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41400 event pairs, 1073 based on Foata normal form. 3/7247 useless extension candidates. Maximal degree in co-relation 83767. Up to 6668 conditions per place. [2024-06-27 20:10:07,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 400 selfloop transitions, 69 changer transitions 0/511 dead transitions. [2024-06-27 20:10:07,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 511 transitions, 6996 flow [2024-06-27 20:10:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-27 20:10:07,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-27 20:10:07,501 INFO L175 Difference]: Start difference. First operand has 396 places, 469 transitions, 5328 flow. Second operand 9 states and 175 transitions. [2024-06-27 20:10:07,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 511 transitions, 6996 flow [2024-06-27 20:10:12,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 511 transitions, 6696 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-27 20:10:12,548 INFO L231 Difference]: Finished difference. Result has 395 places, 475 transitions, 5288 flow [2024-06-27 20:10:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5028, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5288, PETRI_PLACES=395, PETRI_TRANSITIONS=475} [2024-06-27 20:10:12,548 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-27 20:10:12,548 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 475 transitions, 5288 flow [2024-06-27 20:10:12,548 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 20:10:12,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:12,549 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 20:10:12,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:10:12,549 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 20:10:12,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1116923727, now seen corresponding path program 3 times [2024-06-27 20:10:12,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:12,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843245595] [2024-06-27 20:10:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:12,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843245595] [2024-06-27 20:10:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843245595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:13,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:13,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:13,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061846395] [2024-06-27 20:10:13,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:13,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:13,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:13,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:13,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 475 transitions, 5288 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 20:10:13,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:13,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:13,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:15,458 INFO L124 PetriNetUnfolderBase]: 4730/7253 cut-off events. [2024-06-27 20:10:15,459 INFO L125 PetriNetUnfolderBase]: For 2537293/2537363 co-relation queries the response was YES. [2024-06-27 20:10:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82645 conditions, 7253 events. 4730/7253 cut-off events. For 2537293/2537363 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 41172 event pairs, 1063 based on Foata normal form. 6/7221 useless extension candidates. Maximal degree in co-relation 82462. Up to 6645 conditions per place. [2024-06-27 20:10:15,588 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 396 selfloop transitions, 70 changer transitions 0/508 dead transitions. [2024-06-27 20:10:15,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 508 transitions, 6568 flow [2024-06-27 20:10:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:10:15,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:10:15,589 INFO L175 Difference]: Start difference. First operand has 395 places, 475 transitions, 5288 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:10:15,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 508 transitions, 6568 flow [2024-06-27 20:10:20,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 508 transitions, 6386 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:20,551 INFO L231 Difference]: Finished difference. Result has 399 places, 475 transitions, 5252 flow [2024-06-27 20:10:20,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5106, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5252, PETRI_PLACES=399, PETRI_TRANSITIONS=475} [2024-06-27 20:10:20,552 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 20:10:20,552 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 475 transitions, 5252 flow [2024-06-27 20:10:20,552 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 20:10:20,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:20,552 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 20:10:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:10:20,552 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 20:10:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -704909683, now seen corresponding path program 1 times [2024-06-27 20:10:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8500851] [2024-06-27 20:10:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:21,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:21,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8500851] [2024-06-27 20:10:21,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8500851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:21,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:21,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:21,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286660700] [2024-06-27 20:10:21,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:21,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:21,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:21,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:21,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:21,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 475 transitions, 5252 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 20:10:21,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:21,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:21,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:23,393 INFO L124 PetriNetUnfolderBase]: 4786/7298 cut-off events. [2024-06-27 20:10:23,393 INFO L125 PetriNetUnfolderBase]: For 2559189/2559207 co-relation queries the response was YES. [2024-06-27 20:10:23,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84105 conditions, 7298 events. 4786/7298 cut-off events. For 2559189/2559207 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41149 event pairs, 997 based on Foata normal form. 5/7229 useless extension candidates. Maximal degree in co-relation 83921. Up to 6922 conditions per place. [2024-06-27 20:10:23,519 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 29 changer transitions 0/504 dead transitions. [2024-06-27 20:10:23,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 504 transitions, 6332 flow [2024-06-27 20:10:23,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:23,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:10:23,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 20:10:23,520 INFO L175 Difference]: Start difference. First operand has 399 places, 475 transitions, 5252 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:10:23,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 504 transitions, 6332 flow [2024-06-27 20:10:28,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 504 transitions, 6184 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:10:28,674 INFO L231 Difference]: Finished difference. Result has 399 places, 478 transitions, 5256 flow [2024-06-27 20:10:28,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5104, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5256, PETRI_PLACES=399, PETRI_TRANSITIONS=478} [2024-06-27 20:10:28,675 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-27 20:10:28,675 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 478 transitions, 5256 flow [2024-06-27 20:10:28,675 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 20:10:28,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:28,675 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 20:10:28,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:10:28,675 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 20:10:28,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -705263331, now seen corresponding path program 3 times [2024-06-27 20:10:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:28,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643522931] [2024-06-27 20:10:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643522931] [2024-06-27 20:10:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643522931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:29,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:29,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:29,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240634462] [2024-06-27 20:10:29,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:29,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:29,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:10:29,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 478 transitions, 5256 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 20:10:29,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:29,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:10:29,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:31,382 INFO L124 PetriNetUnfolderBase]: 5106/7676 cut-off events. [2024-06-27 20:10:31,382 INFO L125 PetriNetUnfolderBase]: For 2589344/2589346 co-relation queries the response was YES. [2024-06-27 20:10:31,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86731 conditions, 7676 events. 5106/7676 cut-off events. For 2589344/2589346 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 42361 event pairs, 1154 based on Foata normal form. 3/7679 useless extension candidates. Maximal degree in co-relation 86546. Up to 7502 conditions per place. [2024-06-27 20:10:31,513 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 432 selfloop transitions, 75 changer transitions 0/510 dead transitions. [2024-06-27 20:10:31,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 510 transitions, 7234 flow [2024-06-27 20:10:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:31,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:31,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:10:31,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-27 20:10:31,514 INFO L175 Difference]: Start difference. First operand has 399 places, 478 transitions, 5256 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:10:31,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 510 transitions, 7234 flow [2024-06-27 20:10:37,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 510 transitions, 7104 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:10:37,109 INFO L231 Difference]: Finished difference. Result has 401 places, 484 transitions, 5384 flow [2024-06-27 20:10:37,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5384, PETRI_PLACES=401, PETRI_TRANSITIONS=484} [2024-06-27 20:10:37,109 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-27 20:10:37,109 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 484 transitions, 5384 flow [2024-06-27 20:10:37,109 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 20:10:37,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:37,109 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 20:10:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:10:37,109 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:37,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:37,110 INFO L85 PathProgramCache]: Analyzing trace with hash -949797209, now seen corresponding path program 4 times [2024-06-27 20:10:37,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:37,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347704565] [2024-06-27 20:10:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:38,084 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 20:10:38,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347704565] [2024-06-27 20:10:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347704565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113046343] [2024-06-27 20:10:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:38,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:10:38,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 484 transitions, 5384 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 20:10:38,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:38,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:10:38,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:39,829 INFO L124 PetriNetUnfolderBase]: 5111/7683 cut-off events. [2024-06-27 20:10:39,829 INFO L125 PetriNetUnfolderBase]: For 2621913/2621915 co-relation queries the response was YES. [2024-06-27 20:10:39,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87047 conditions, 7683 events. 5111/7683 cut-off events. For 2621913/2621915 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42361 event pairs, 1166 based on Foata normal form. 3/7686 useless extension candidates. Maximal degree in co-relation 86861. Up to 7508 conditions per place. [2024-06-27 20:10:39,956 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 429 selfloop transitions, 77 changer transitions 0/509 dead transitions. [2024-06-27 20:10:39,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 509 transitions, 7047 flow [2024-06-27 20:10:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:39,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:10:39,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-27 20:10:39,958 INFO L175 Difference]: Start difference. First operand has 401 places, 484 transitions, 5384 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:10:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 509 transitions, 7047 flow [2024-06-27 20:10:45,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 509 transitions, 6886 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:45,406 INFO L231 Difference]: Finished difference. Result has 405 places, 487 transitions, 5444 flow [2024-06-27 20:10:45,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5444, PETRI_PLACES=405, PETRI_TRANSITIONS=487} [2024-06-27 20:10:45,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 361 predicate places. [2024-06-27 20:10:45,406 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 487 transitions, 5444 flow [2024-06-27 20:10:45,406 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 20:10:45,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:45,406 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 20:10:45,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:10:45,407 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:45,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -704904847, now seen corresponding path program 1 times [2024-06-27 20:10:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806852415] [2024-06-27 20:10:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:46,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806852415] [2024-06-27 20:10:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806852415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:46,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:46,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:46,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879916447] [2024-06-27 20:10:46,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:46,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:46,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:46,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 487 transitions, 5444 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 20:10:46,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:46,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:46,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:48,241 INFO L124 PetriNetUnfolderBase]: 4864/7401 cut-off events. [2024-06-27 20:10:48,241 INFO L125 PetriNetUnfolderBase]: For 2762367/2762388 co-relation queries the response was YES. [2024-06-27 20:10:48,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87183 conditions, 7401 events. 4864/7401 cut-off events. For 2762367/2762388 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 41703 event pairs, 1048 based on Foata normal form. 7/7328 useless extension candidates. Maximal degree in co-relation 86996. Up to 6953 conditions per place. [2024-06-27 20:10:48,370 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 427 selfloop transitions, 61 changer transitions 0/531 dead transitions. [2024-06-27 20:10:48,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 531 transitions, 7273 flow [2024-06-27 20:10:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:10:48,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:10:48,371 INFO L175 Difference]: Start difference. First operand has 405 places, 487 transitions, 5444 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:10:48,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 531 transitions, 7273 flow [2024-06-27 20:10:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 531 transitions, 7123 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:53,345 INFO L231 Difference]: Finished difference. Result has 409 places, 503 transitions, 5701 flow [2024-06-27 20:10:53,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5701, PETRI_PLACES=409, PETRI_TRANSITIONS=503} [2024-06-27 20:10:53,346 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 365 predicate places. [2024-06-27 20:10:53,346 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 503 transitions, 5701 flow [2024-06-27 20:10:53,346 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 20:10:53,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:53,346 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 20:10:53,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:10:53,346 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:53,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash -949796961, now seen corresponding path program 2 times [2024-06-27 20:10:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611629977] [2024-06-27 20:10:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:53,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611629977] [2024-06-27 20:10:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611629977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:54,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:54,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:54,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103891387] [2024-06-27 20:10:54,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:54,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:54,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:54,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:10:54,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 503 transitions, 5701 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 20:10:54,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:54,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:10:54,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:56,218 INFO L124 PetriNetUnfolderBase]: 4902/7455 cut-off events. [2024-06-27 20:10:56,218 INFO L125 PetriNetUnfolderBase]: For 2816815/2816833 co-relation queries the response was YES. [2024-06-27 20:10:56,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89173 conditions, 7455 events. 4902/7455 cut-off events. For 2816815/2816833 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 42083 event pairs, 999 based on Foata normal form. 5/7381 useless extension candidates. Maximal degree in co-relation 88984. Up to 6982 conditions per place. [2024-06-27 20:10:56,348 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 440 selfloop transitions, 62 changer transitions 0/545 dead transitions. [2024-06-27 20:10:56,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 545 transitions, 7632 flow [2024-06-27 20:10:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:10:56,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:10:56,349 INFO L175 Difference]: Start difference. First operand has 409 places, 503 transitions, 5701 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:10:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 545 transitions, 7632 flow [2024-06-27 20:11:02,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 545 transitions, 7516 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:02,414 INFO L231 Difference]: Finished difference. Result has 416 places, 519 transitions, 6066 flow [2024-06-27 20:11:02,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6066, PETRI_PLACES=416, PETRI_TRANSITIONS=519} [2024-06-27 20:11:02,414 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-27 20:11:02,414 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 519 transitions, 6066 flow [2024-06-27 20:11:02,415 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 20:11:02,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:02,415 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 20:11:02,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:11:02,415 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:02,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:02,415 INFO L85 PathProgramCache]: Analyzing trace with hash -772665441, now seen corresponding path program 3 times [2024-06-27 20:11:02,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:02,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967276785] [2024-06-27 20:11:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:02,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:03,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:03,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967276785] [2024-06-27 20:11:03,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967276785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:03,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:03,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:03,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986381203] [2024-06-27 20:11:03,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:03,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:03,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:03,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:03,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 519 transitions, 6066 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 20:11:03,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:03,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:03,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:05,294 INFO L124 PetriNetUnfolderBase]: 4924/7487 cut-off events. [2024-06-27 20:11:05,295 INFO L125 PetriNetUnfolderBase]: For 2881459/2881477 co-relation queries the response was YES. [2024-06-27 20:11:05,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90723 conditions, 7487 events. 4924/7487 cut-off events. For 2881459/2881477 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42289 event pairs, 997 based on Foata normal form. 5/7413 useless extension candidates. Maximal degree in co-relation 90530. Up to 7007 conditions per place. [2024-06-27 20:11:05,424 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 70 changer transitions 0/547 dead transitions. [2024-06-27 20:11:05,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 547 transitions, 7878 flow [2024-06-27 20:11:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:05,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:11:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-27 20:11:05,426 INFO L175 Difference]: Start difference. First operand has 416 places, 519 transitions, 6066 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:11:05,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 547 transitions, 7878 flow [2024-06-27 20:11:10,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 547 transitions, 7728 flow, removed 70 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:10,181 INFO L231 Difference]: Finished difference. Result has 422 places, 525 transitions, 6254 flow [2024-06-27 20:11:10,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6254, PETRI_PLACES=422, PETRI_TRANSITIONS=525} [2024-06-27 20:11:10,182 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-27 20:11:10,182 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 525 transitions, 6254 flow [2024-06-27 20:11:10,182 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 20:11:10,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:10,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:10,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:11:10,182 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:10,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:10,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1633111265, now seen corresponding path program 5 times [2024-06-27 20:11:10,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:10,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335137175] [2024-06-27 20:11:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:10,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:11,171 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 20:11:11,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:11,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335137175] [2024-06-27 20:11:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335137175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:11,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:11,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:11,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287384832] [2024-06-27 20:11:11,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:11,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:11,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 525 transitions, 6254 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 20:11:11,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:11,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:11,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:13,124 INFO L124 PetriNetUnfolderBase]: 5247/7871 cut-off events. [2024-06-27 20:11:13,124 INFO L125 PetriNetUnfolderBase]: For 2899705/2899707 co-relation queries the response was YES. [2024-06-27 20:11:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92979 conditions, 7871 events. 5247/7871 cut-off events. For 2899705/2899707 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43499 event pairs, 1164 based on Foata normal form. 3/7874 useless extension candidates. Maximal degree in co-relation 92783. Up to 7691 conditions per place. [2024-06-27 20:11:13,252 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 465 selfloop transitions, 86 changer transitions 0/554 dead transitions. [2024-06-27 20:11:13,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 554 transitions, 8383 flow [2024-06-27 20:11:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:13,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:11:13,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 20:11:13,254 INFO L175 Difference]: Start difference. First operand has 422 places, 525 transitions, 6254 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:11:13,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 554 transitions, 8383 flow [2024-06-27 20:11:19,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 554 transitions, 8229 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:19,031 INFO L231 Difference]: Finished difference. Result has 426 places, 534 transitions, 6429 flow [2024-06-27 20:11:19,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6429, PETRI_PLACES=426, PETRI_TRANSITIONS=534} [2024-06-27 20:11:19,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 382 predicate places. [2024-06-27 20:11:19,031 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 534 transitions, 6429 flow [2024-06-27 20:11:19,031 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 20:11:19,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:19,031 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 20:11:19,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:11:19,031 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:19,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash -772845179, now seen corresponding path program 6 times [2024-06-27 20:11:19,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:19,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141956134] [2024-06-27 20:11:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:20,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141956134] [2024-06-27 20:11:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141956134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:20,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:20,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642262570] [2024-06-27 20:11:20,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:20,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:20,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:20,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:20,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:20,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-27 20:11:20,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 534 transitions, 6429 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 20:11:20,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:20,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-27 20:11:20,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:22,062 INFO L124 PetriNetUnfolderBase]: 5244/7867 cut-off events. [2024-06-27 20:11:22,062 INFO L125 PetriNetUnfolderBase]: For 2929471/2929473 co-relation queries the response was YES. [2024-06-27 20:11:22,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93020 conditions, 7867 events. 5244/7867 cut-off events. For 2929471/2929473 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 43509 event pairs, 1164 based on Foata normal form. 3/7870 useless extension candidates. Maximal degree in co-relation 92823. Up to 7688 conditions per place. [2024-06-27 20:11:22,196 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 464 selfloop transitions, 87 changer transitions 0/554 dead transitions. [2024-06-27 20:11:22,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 554 transitions, 8413 flow [2024-06-27 20:11:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:11:22,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-27 20:11:22,197 INFO L175 Difference]: Start difference. First operand has 426 places, 534 transitions, 6429 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:11:22,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 554 transitions, 8413 flow [2024-06-27 20:11:29,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 554 transitions, 8268 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 20:11:29,312 INFO L231 Difference]: Finished difference. Result has 431 places, 534 transitions, 6464 flow [2024-06-27 20:11:29,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6284, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6464, PETRI_PLACES=431, PETRI_TRANSITIONS=534} [2024-06-27 20:11:29,313 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 387 predicate places. [2024-06-27 20:11:29,313 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 534 transitions, 6464 flow [2024-06-27 20:11:29,313 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 20:11:29,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:29,313 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 20:11:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:11:29,313 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:29,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1010127245, now seen corresponding path program 2 times [2024-06-27 20:11:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:29,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941392542] [2024-06-27 20:11:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:29,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:30,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:30,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:30,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941392542] [2024-06-27 20:11:30,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941392542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:30,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:30,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:30,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679590633] [2024-06-27 20:11:30,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:30,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:30,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:30,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:30,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:30,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 534 transitions, 6464 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 20:11:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:32,206 INFO L124 PetriNetUnfolderBase]: 4993/7584 cut-off events. [2024-06-27 20:11:32,207 INFO L125 PetriNetUnfolderBase]: For 3067524/3067545 co-relation queries the response was YES. [2024-06-27 20:11:32,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92800 conditions, 7584 events. 4993/7584 cut-off events. For 3067524/3067545 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42889 event pairs, 1061 based on Foata normal form. 7/7516 useless extension candidates. Maximal degree in co-relation 92602. Up to 7098 conditions per place. [2024-06-27 20:11:32,343 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 70 changer transitions 0/568 dead transitions. [2024-06-27 20:11:32,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 568 transitions, 8270 flow [2024-06-27 20:11:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:32,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:11:32,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-27 20:11:32,344 INFO L175 Difference]: Start difference. First operand has 431 places, 534 transitions, 6464 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:11:32,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 568 transitions, 8270 flow [2024-06-27 20:11:37,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 568 transitions, 8104 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:37,085 INFO L231 Difference]: Finished difference. Result has 433 places, 543 transitions, 6582 flow [2024-06-27 20:11:37,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6298, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6582, PETRI_PLACES=433, PETRI_TRANSITIONS=543} [2024-06-27 20:11:37,085 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 389 predicate places. [2024-06-27 20:11:37,085 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 543 transitions, 6582 flow [2024-06-27 20:11:37,085 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 20:11:37,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:37,085 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 20:11:37,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:11:37,086 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:37,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:37,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1010364395, now seen corresponding path program 3 times [2024-06-27 20:11:37,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:37,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296163698] [2024-06-27 20:11:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:38,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:38,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:38,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296163698] [2024-06-27 20:11:38,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296163698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:38,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:38,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783184480] [2024-06-27 20:11:38,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:38,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:38,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:38,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:38,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:38,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:38,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 543 transitions, 6582 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 20:11:38,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:38,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:38,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:39,988 INFO L124 PetriNetUnfolderBase]: 4996/7584 cut-off events. [2024-06-27 20:11:39,988 INFO L125 PetriNetUnfolderBase]: For 3101993/3102014 co-relation queries the response was YES. [2024-06-27 20:11:40,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93072 conditions, 7584 events. 4996/7584 cut-off events. For 3101993/3102014 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42858 event pairs, 1066 based on Foata normal form. 7/7511 useless extension candidates. Maximal degree in co-relation 92873. Up to 7103 conditions per place. [2024-06-27 20:11:40,120 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 456 selfloop transitions, 68 changer transitions 0/570 dead transitions. [2024-06-27 20:11:40,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 570 transitions, 8264 flow [2024-06-27 20:11:40,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:11:40,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:11:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:11:40,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-27 20:11:40,121 INFO L175 Difference]: Start difference. First operand has 433 places, 543 transitions, 6582 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:11:40,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 570 transitions, 8264 flow [2024-06-27 20:11:47,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 570 transitions, 8128 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:47,152 INFO L231 Difference]: Finished difference. Result has 437 places, 543 transitions, 6588 flow [2024-06-27 20:11:47,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6446, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6588, PETRI_PLACES=437, PETRI_TRANSITIONS=543} [2024-06-27 20:11:47,152 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-27 20:11:47,152 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 543 transitions, 6588 flow [2024-06-27 20:11:47,153 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 20:11:47,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:47,153 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 20:11:47,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:11:47,153 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:47,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash 152929260, now seen corresponding path program 11 times [2024-06-27 20:11:47,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:47,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231068455] [2024-06-27 20:11:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:47,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:48,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:48,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231068455] [2024-06-27 20:11:48,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231068455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:48,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:48,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:11:48,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128173724] [2024-06-27 20:11:48,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:48,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:11:48,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:48,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:11:48,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:11:49,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:49,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 543 transitions, 6588 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:49,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:51,365 INFO L124 PetriNetUnfolderBase]: 5243/7930 cut-off events. [2024-06-27 20:11:51,366 INFO L125 PetriNetUnfolderBase]: For 3146092/3146096 co-relation queries the response was YES. [2024-06-27 20:11:51,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95729 conditions, 7930 events. 5243/7930 cut-off events. For 3146092/3146096 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 44679 event pairs, 973 based on Foata normal form. 6/7932 useless extension candidates. Maximal degree in co-relation 95529. Up to 6782 conditions per place. [2024-06-27 20:11:51,515 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 441 selfloop transitions, 116 changer transitions 0/602 dead transitions. [2024-06-27 20:11:51,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 602 transitions, 8686 flow [2024-06-27 20:11:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:11:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:11:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-27 20:11:51,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4587737843551797 [2024-06-27 20:11:51,516 INFO L175 Difference]: Start difference. First operand has 437 places, 543 transitions, 6588 flow. Second operand 11 states and 217 transitions. [2024-06-27 20:11:51,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 602 transitions, 8686 flow [2024-06-27 20:11:56,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 602 transitions, 8550 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:56,775 INFO L231 Difference]: Finished difference. Result has 444 places, 554 transitions, 7083 flow [2024-06-27 20:11:56,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6452, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7083, PETRI_PLACES=444, PETRI_TRANSITIONS=554} [2024-06-27 20:11:56,776 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-27 20:11:56,776 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 554 transitions, 7083 flow [2024-06-27 20:11:56,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:56,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:56,776 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 20:11:56,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:11:56,777 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:56,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:56,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1316665862, now seen corresponding path program 12 times [2024-06-27 20:11:56,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:56,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289968607] [2024-06-27 20:11:56,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:56,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:58,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289968607] [2024-06-27 20:11:58,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289968607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:58,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:11:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941141424] [2024-06-27 20:11:58,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:58,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:11:58,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:58,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:11:58,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:11:58,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:11:58,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 554 transitions, 7083 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:58,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:58,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:11:58,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:01,303 INFO L124 PetriNetUnfolderBase]: 5261/7958 cut-off events. [2024-06-27 20:12:01,303 INFO L125 PetriNetUnfolderBase]: For 3201722/3201726 co-relation queries the response was YES. [2024-06-27 20:12:01,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97207 conditions, 7958 events. 5261/7958 cut-off events. For 3201722/3201726 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 44907 event pairs, 988 based on Foata normal form. 6/7960 useless extension candidates. Maximal degree in co-relation 97005. Up to 6857 conditions per place. [2024-06-27 20:12:01,429 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 437 selfloop transitions, 121 changer transitions 0/603 dead transitions. [2024-06-27 20:12:01,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 603 transitions, 8529 flow [2024-06-27 20:12:01,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-27 20:12:01,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439746300211416 [2024-06-27 20:12:01,430 INFO L175 Difference]: Start difference. First operand has 444 places, 554 transitions, 7083 flow. Second operand 11 states and 210 transitions. [2024-06-27 20:12:01,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 603 transitions, 8529 flow [2024-06-27 20:12:06,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 603 transitions, 8238 flow, removed 99 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:06,355 INFO L231 Difference]: Finished difference. Result has 451 places, 558 transitions, 7221 flow [2024-06-27 20:12:06,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6792, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7221, PETRI_PLACES=451, PETRI_TRANSITIONS=558} [2024-06-27 20:12:06,355 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-27 20:12:06,355 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 558 transitions, 7221 flow [2024-06-27 20:12:06,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:06,356 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 20:12:06,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:12:06,356 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:06,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:06,356 INFO L85 PathProgramCache]: Analyzing trace with hash -48167430, now seen corresponding path program 13 times [2024-06-27 20:12:06,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:06,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707405317] [2024-06-27 20:12:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:06,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:08,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:08,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707405317] [2024-06-27 20:12:08,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707405317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:08,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:08,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:12:08,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395919234] [2024-06-27 20:12:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:12:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:08,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:12:08,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:12:08,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:08,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 558 transitions, 7221 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:08,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:08,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:08,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:10,519 INFO L124 PetriNetUnfolderBase]: 5300/8017 cut-off events. [2024-06-27 20:12:10,519 INFO L125 PetriNetUnfolderBase]: For 3244163/3244167 co-relation queries the response was YES. [2024-06-27 20:12:10,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98333 conditions, 8017 events. 5300/8017 cut-off events. For 3244163/3244167 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45267 event pairs, 968 based on Foata normal form. 6/8019 useless extension candidates. Maximal degree in co-relation 98129. Up to 6903 conditions per place. [2024-06-27 20:12:10,664 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 445 selfloop transitions, 119 changer transitions 0/609 dead transitions. [2024-06-27 20:12:10,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 609 transitions, 8703 flow [2024-06-27 20:12:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:10,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:10,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:12:10,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503171247357294 [2024-06-27 20:12:10,666 INFO L175 Difference]: Start difference. First operand has 451 places, 558 transitions, 7221 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:12:10,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 609 transitions, 8703 flow [2024-06-27 20:12:16,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 609 transitions, 8342 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:16,140 INFO L231 Difference]: Finished difference. Result has 455 places, 563 transitions, 7303 flow [2024-06-27 20:12:16,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7303, PETRI_PLACES=455, PETRI_TRANSITIONS=563} [2024-06-27 20:12:16,141 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-27 20:12:16,141 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 563 transitions, 7303 flow [2024-06-27 20:12:16,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:16,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:16,141 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 20:12:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:12:16,141 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:16,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1316658422, now seen corresponding path program 14 times [2024-06-27 20:12:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:16,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090513652] [2024-06-27 20:12:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:17,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:17,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090513652] [2024-06-27 20:12:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090513652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:17,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:17,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:12:17,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353195064] [2024-06-27 20:12:17,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:12:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:12:17,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:12:17,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:17,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 563 transitions, 7303 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:17,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:17,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:17,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:20,505 INFO L124 PetriNetUnfolderBase]: 5317/8044 cut-off events. [2024-06-27 20:12:20,505 INFO L125 PetriNetUnfolderBase]: For 3290838/3290842 co-relation queries the response was YES. [2024-06-27 20:12:20,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98891 conditions, 8044 events. 5317/8044 cut-off events. For 3290838/3290842 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 45445 event pairs, 983 based on Foata normal form. 6/8046 useless extension candidates. Maximal degree in co-relation 98686. Up to 6889 conditions per place. [2024-06-27 20:12:20,651 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 438 selfloop transitions, 127 changer transitions 0/610 dead transitions. [2024-06-27 20:12:20,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 610 transitions, 8743 flow [2024-06-27 20:12:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-27 20:12:20,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44608879492600423 [2024-06-27 20:12:20,652 INFO L175 Difference]: Start difference. First operand has 455 places, 563 transitions, 7303 flow. Second operand 11 states and 211 transitions. [2024-06-27 20:12:20,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 610 transitions, 8743 flow [2024-06-27 20:12:27,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 610 transitions, 8370 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:27,468 INFO L231 Difference]: Finished difference. Result has 459 places, 565 transitions, 7355 flow [2024-06-27 20:12:27,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7355, PETRI_PLACES=459, PETRI_TRANSITIONS=565} [2024-06-27 20:12:27,469 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 415 predicate places. [2024-06-27 20:12:27,470 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 565 transitions, 7355 flow [2024-06-27 20:12:27,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:27,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:27,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:27,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:12:27,470 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:27,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:27,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1316398952, now seen corresponding path program 15 times [2024-06-27 20:12:27,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:27,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245084886] [2024-06-27 20:12:27,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:27,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:27,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:29,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:29,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245084886] [2024-06-27 20:12:29,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245084886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:29,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:29,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:12:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157498554] [2024-06-27 20:12:29,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:29,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:12:29,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:29,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:12:29,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:12:29,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:29,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 565 transitions, 7355 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:29,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:29,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:29,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:32,314 INFO L124 PetriNetUnfolderBase]: 5334/8071 cut-off events. [2024-06-27 20:12:32,315 INFO L125 PetriNetUnfolderBase]: For 3337930/3337934 co-relation queries the response was YES. [2024-06-27 20:12:32,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99502 conditions, 8071 events. 5334/8071 cut-off events. For 3337930/3337934 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45647 event pairs, 983 based on Foata normal form. 6/8073 useless extension candidates. Maximal degree in co-relation 99296. Up to 6852 conditions per place. [2024-06-27 20:12:32,580 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 436 selfloop transitions, 131 changer transitions 0/612 dead transitions. [2024-06-27 20:12:32,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 612 transitions, 8799 flow [2024-06-27 20:12:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:32,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:12:32,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:12:32,581 INFO L175 Difference]: Start difference. First operand has 459 places, 565 transitions, 7355 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:12:32,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 612 transitions, 8799 flow [2024-06-27 20:12:38,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 612 transitions, 8392 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:38,120 INFO L231 Difference]: Finished difference. Result has 461 places, 567 transitions, 7385 flow [2024-06-27 20:12:38,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6948, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7385, PETRI_PLACES=461, PETRI_TRANSITIONS=567} [2024-06-27 20:12:38,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-27 20:12:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 567 transitions, 7385 flow [2024-06-27 20:12:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:38,121 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 20:12:38,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:12:38,121 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:38,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:38,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1307461652, now seen corresponding path program 16 times [2024-06-27 20:12:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572799061] [2024-06-27 20:12:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:38,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:38,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:39,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572799061] [2024-06-27 20:12:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572799061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:39,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:39,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:12:39,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944676707] [2024-06-27 20:12:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:39,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:12:39,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:12:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:12:39,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:39,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 567 transitions, 7385 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:39,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:39,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:39,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:42,810 INFO L124 PetriNetUnfolderBase]: 5391/8152 cut-off events. [2024-06-27 20:12:42,810 INFO L125 PetriNetUnfolderBase]: For 3465834/3465838 co-relation queries the response was YES. [2024-06-27 20:12:42,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101925 conditions, 8152 events. 5391/8152 cut-off events. For 3465834/3465838 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46213 event pairs, 992 based on Foata normal form. 6/8136 useless extension candidates. Maximal degree in co-relation 101718. Up to 6373 conditions per place. [2024-06-27 20:12:42,945 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 400 selfloop transitions, 173 changer transitions 0/618 dead transitions. [2024-06-27 20:12:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 618 transitions, 9487 flow [2024-06-27 20:12:42,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:42,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:12:42,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:12:42,946 INFO L175 Difference]: Start difference. First operand has 461 places, 567 transitions, 7385 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:12:42,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 618 transitions, 9487 flow [2024-06-27 20:12:49,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 618 transitions, 9068 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-06-27 20:12:49,038 INFO L231 Difference]: Finished difference. Result has 463 places, 571 transitions, 7659 flow [2024-06-27 20:12:49,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7659, PETRI_PLACES=463, PETRI_TRANSITIONS=571} [2024-06-27 20:12:49,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 419 predicate places. [2024-06-27 20:12:49,039 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 571 transitions, 7659 flow [2024-06-27 20:12:49,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:49,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:49,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:49,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:12:49,039 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:49,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:49,039 INFO L85 PathProgramCache]: Analyzing trace with hash -48159990, now seen corresponding path program 17 times [2024-06-27 20:12:49,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:49,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000246087] [2024-06-27 20:12:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:49,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:50,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000246087] [2024-06-27 20:12:50,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000246087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:50,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:50,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:12:50,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349269023] [2024-06-27 20:12:50,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:50,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:12:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:12:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:12:50,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:12:50,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 571 transitions, 7659 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:50,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:50,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:12:50,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:53,888 INFO L124 PetriNetUnfolderBase]: 5418/8203 cut-off events. [2024-06-27 20:12:53,888 INFO L125 PetriNetUnfolderBase]: For 3513430/3513434 co-relation queries the response was YES. [2024-06-27 20:12:53,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103312 conditions, 8203 events. 5418/8203 cut-off events. For 3513430/3513434 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46575 event pairs, 1007 based on Foata normal form. 6/8205 useless extension candidates. Maximal degree in co-relation 103104. Up to 7024 conditions per place. [2024-06-27 20:12:54,021 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 454 selfloop transitions, 124 changer transitions 0/623 dead transitions. [2024-06-27 20:12:54,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 623 transitions, 9797 flow [2024-06-27 20:12:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:12:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:12:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 20:12:54,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 20:12:54,022 INFO L175 Difference]: Start difference. First operand has 463 places, 571 transitions, 7659 flow. Second operand 11 states and 215 transitions. [2024-06-27 20:12:54,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 623 transitions, 9797 flow [2024-06-27 20:13:00,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 623 transitions, 9392 flow, removed 131 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:00,894 INFO L231 Difference]: Finished difference. Result has 467 places, 575 transitions, 7857 flow [2024-06-27 20:13:00,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7857, PETRI_PLACES=467, PETRI_TRANSITIONS=575} [2024-06-27 20:13:00,894 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-27 20:13:00,895 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 575 transitions, 7857 flow [2024-06-27 20:13:00,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:00,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:00,895 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 20:13:00,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:13:00,895 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:00,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:00,896 INFO L85 PathProgramCache]: Analyzing trace with hash -416717742, now seen corresponding path program 18 times [2024-06-27 20:13:00,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:00,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665191609] [2024-06-27 20:13:00,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:00,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:02,598 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 20:13:02,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:02,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665191609] [2024-06-27 20:13:02,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665191609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:02,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:02,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:13:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821809610] [2024-06-27 20:13:02,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:02,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:13:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:13:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:13:02,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 575 transitions, 7857 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:02,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:02,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:02,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:05,594 INFO L124 PetriNetUnfolderBase]: 5410/8191 cut-off events. [2024-06-27 20:13:05,594 INFO L125 PetriNetUnfolderBase]: For 3503748/3503752 co-relation queries the response was YES. [2024-06-27 20:13:05,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102455 conditions, 8191 events. 5410/8191 cut-off events. For 3503748/3503752 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46536 event pairs, 1000 based on Foata normal form. 6/8193 useless extension candidates. Maximal degree in co-relation 102245. Up to 7077 conditions per place. [2024-06-27 20:13:05,744 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 455 selfloop transitions, 121 changer transitions 0/621 dead transitions. [2024-06-27 20:13:05,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 621 transitions, 9169 flow [2024-06-27 20:13:05,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:05,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-27 20:13:05,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44820295983086683 [2024-06-27 20:13:05,745 INFO L175 Difference]: Start difference. First operand has 467 places, 575 transitions, 7857 flow. Second operand 11 states and 212 transitions. [2024-06-27 20:13:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 621 transitions, 9169 flow [2024-06-27 20:13:12,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 621 transitions, 8776 flow, removed 131 selfloop flow, removed 7 redundant places. [2024-06-27 20:13:12,365 INFO L231 Difference]: Finished difference. Result has 471 places, 575 transitions, 7713 flow [2024-06-27 20:13:12,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7464, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7713, PETRI_PLACES=471, PETRI_TRANSITIONS=575} [2024-06-27 20:13:12,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-27 20:13:12,366 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 575 transitions, 7713 flow [2024-06-27 20:13:12,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:12,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:12,366 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 20:13:12,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:13:12,366 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:12,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash -210064302, now seen corresponding path program 19 times [2024-06-27 20:13:12,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:12,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680631484] [2024-06-27 20:13:12,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:14,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:14,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680631484] [2024-06-27 20:13:14,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680631484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:14,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:14,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 20:13:14,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286535009] [2024-06-27 20:13:14,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 20:13:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 20:13:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 20:13:14,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:14,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 575 transitions, 7713 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:14,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:14,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:14,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:17,079 INFO L124 PetriNetUnfolderBase]: 5402/8179 cut-off events. [2024-06-27 20:13:17,080 INFO L125 PetriNetUnfolderBase]: For 3504194/3504198 co-relation queries the response was YES. [2024-06-27 20:13:17,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101968 conditions, 8179 events. 5402/8179 cut-off events. For 3504194/3504198 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46493 event pairs, 1003 based on Foata normal form. 6/8181 useless extension candidates. Maximal degree in co-relation 101756. Up to 7065 conditions per place. [2024-06-27 20:13:17,218 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 458 selfloop transitions, 118 changer transitions 0/621 dead transitions. [2024-06-27 20:13:17,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 621 transitions, 9025 flow [2024-06-27 20:13:17,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:17,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:13:17,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:13:17,220 INFO L175 Difference]: Start difference. First operand has 471 places, 575 transitions, 7713 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:13:17,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 621 transitions, 9025 flow [2024-06-27 20:13:23,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 621 transitions, 8659 flow, removed 56 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:23,726 INFO L231 Difference]: Finished difference. Result has 472 places, 575 transitions, 7590 flow [2024-06-27 20:13:23,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7347, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7590, PETRI_PLACES=472, PETRI_TRANSITIONS=575} [2024-06-27 20:13:23,726 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 428 predicate places. [2024-06-27 20:13:23,726 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 575 transitions, 7590 flow [2024-06-27 20:13:23,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:23,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:23,726 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 20:13:23,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:13:23,727 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:23,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:23,727 INFO L85 PathProgramCache]: Analyzing trace with hash -209797392, now seen corresponding path program 20 times [2024-06-27 20:13:23,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:23,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580188950] [2024-06-27 20:13:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:23,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:25,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:25,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:25,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580188950] [2024-06-27 20:13:25,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580188950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:25,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:25,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 20:13:25,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946479073] [2024-06-27 20:13:25,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:25,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 20:13:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 20:13:25,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 20:13:25,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:25,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 575 transitions, 7590 flow. Second operand has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:25,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:25,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:28,157 INFO L124 PetriNetUnfolderBase]: 5394/8167 cut-off events. [2024-06-27 20:13:28,157 INFO L125 PetriNetUnfolderBase]: For 3512912/3512916 co-relation queries the response was YES. [2024-06-27 20:13:28,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101273 conditions, 8167 events. 5394/8167 cut-off events. For 3512912/3512916 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46373 event pairs, 1006 based on Foata normal form. 6/8169 useless extension candidates. Maximal degree in co-relation 101060. Up to 6871 conditions per place. [2024-06-27 20:13:28,289 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 444 selfloop transitions, 132 changer transitions 0/621 dead transitions. [2024-06-27 20:13:28,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 621 transitions, 8894 flow [2024-06-27 20:13:28,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:13:28,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:13:28,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-27 20:13:28,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452431289640592 [2024-06-27 20:13:28,290 INFO L175 Difference]: Start difference. First operand has 472 places, 575 transitions, 7590 flow. Second operand 11 states and 214 transitions. [2024-06-27 20:13:28,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 621 transitions, 8894 flow [2024-06-27 20:13:36,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 621 transitions, 8585 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-27 20:13:36,439 INFO L231 Difference]: Finished difference. Result has 473 places, 575 transitions, 7552 flow [2024-06-27 20:13:36,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7281, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7552, PETRI_PLACES=473, PETRI_TRANSITIONS=575} [2024-06-27 20:13:36,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-27 20:13:36,440 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 575 transitions, 7552 flow [2024-06-27 20:13:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.333333333333334) internal successors, (124), 12 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:36,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:36,440 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 20:13:36,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:13:36,440 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:36,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash -772434057, now seen corresponding path program 4 times [2024-06-27 20:13:36,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:36,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468961265] [2024-06-27 20:13:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:36,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:37,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:37,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468961265] [2024-06-27 20:13:37,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468961265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:37,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451900382] [2024-06-27 20:13:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:37,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:37,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:37,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 575 transitions, 7552 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 20:13:37,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:37,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:37,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:40,226 INFO L124 PetriNetUnfolderBase]: 5138/7888 cut-off events. [2024-06-27 20:13:40,226 INFO L125 PetriNetUnfolderBase]: For 3640305/3640320 co-relation queries the response was YES. [2024-06-27 20:13:40,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100837 conditions, 7888 events. 5138/7888 cut-off events. For 3640305/3640320 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45791 event pairs, 1080 based on Foata normal form. 6/7831 useless extension candidates. Maximal degree in co-relation 100623. Up to 7235 conditions per place. [2024-06-27 20:13:40,365 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 492 selfloop transitions, 75 changer transitions 0/609 dead transitions. [2024-06-27 20:13:40,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 609 transitions, 9488 flow [2024-06-27 20:13:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:13:40,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-27 20:13:40,366 INFO L175 Difference]: Start difference. First operand has 473 places, 575 transitions, 7552 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:13:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 609 transitions, 9488 flow [2024-06-27 20:13:49,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 609 transitions, 8756 flow, removed 37 selfloop flow, removed 13 redundant places. [2024-06-27 20:13:49,330 INFO L231 Difference]: Finished difference. Result has 469 places, 581 transitions, 7098 flow [2024-06-27 20:13:49,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6820, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7098, PETRI_PLACES=469, PETRI_TRANSITIONS=581} [2024-06-27 20:13:49,331 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 425 predicate places. [2024-06-27 20:13:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 581 transitions, 7098 flow [2024-06-27 20:13:49,331 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 20:13:49,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:49,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:49,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:13:49,331 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1010536817, now seen corresponding path program 5 times [2024-06-27 20:13:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:49,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893457567] [2024-06-27 20:13:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:49,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:50,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:50,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893457567] [2024-06-27 20:13:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893457567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:50,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:50,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750014152] [2024-06-27 20:13:50,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:50,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:50,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:50,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:13:50,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 581 transitions, 7098 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 20:13:50,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:50,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:13:50,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:53,102 INFO L124 PetriNetUnfolderBase]: 5147/7901 cut-off events. [2024-06-27 20:13:53,102 INFO L125 PetriNetUnfolderBase]: For 3690601/3690696 co-relation queries the response was YES. [2024-06-27 20:13:53,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98968 conditions, 7901 events. 5147/7901 cut-off events. For 3690601/3690696 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45967 event pairs, 1081 based on Foata normal form. 6/7840 useless extension candidates. Maximal degree in co-relation 98756. Up to 7245 conditions per place. [2024-06-27 20:13:53,245 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 497 selfloop transitions, 75 changer transitions 0/614 dead transitions. [2024-06-27 20:13:53,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 614 transitions, 8999 flow [2024-06-27 20:13:53,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:13:53,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:13:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:13:53,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-27 20:13:53,246 INFO L175 Difference]: Start difference. First operand has 469 places, 581 transitions, 7098 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:13:53,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 614 transitions, 8999 flow [2024-06-27 20:13:59,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 614 transitions, 8842 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:13:59,239 INFO L231 Difference]: Finished difference. Result has 473 places, 584 transitions, 7164 flow [2024-06-27 20:13:59,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6952, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7164, PETRI_PLACES=473, PETRI_TRANSITIONS=584} [2024-06-27 20:13:59,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 429 predicate places. [2024-06-27 20:13:59,240 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 584 transitions, 7164 flow [2024-06-27 20:13:59,240 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 20:13:59,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:59,240 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 20:13:59,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:13:59,240 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:59,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -772849767, now seen corresponding path program 6 times [2024-06-27 20:13:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964370997] [2024-06-27 20:13:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:14:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:14:00,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:14:00,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964370997] [2024-06-27 20:14:00,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964370997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:14:00,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:14:00,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:14:00,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254983692] [2024-06-27 20:14:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:14:00,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:14:00,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:14:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:14:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:14:00,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-27 20:14:00,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 584 transitions, 7164 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 20:14:00,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:14:00,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-27 20:14:00,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:14:03,118 INFO L124 PetriNetUnfolderBase]: 5135/7885 cut-off events. [2024-06-27 20:14:03,118 INFO L125 PetriNetUnfolderBase]: For 3667487/3667562 co-relation queries the response was YES. [2024-06-27 20:14:03,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98080 conditions, 7885 events. 5135/7885 cut-off events. For 3667487/3667562 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45834 event pairs, 1074 based on Foata normal form. 3/7825 useless extension candidates. Maximal degree in co-relation 97867. Up to 7238 conditions per place. [2024-06-27 20:14:03,264 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 495 selfloop transitions, 76 changer transitions 0/613 dead transitions. [2024-06-27 20:14:03,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 613 transitions, 8690 flow [2024-06-27 20:14:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:14:03,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:14:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:14:03,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-27 20:14:03,266 INFO L175 Difference]: Start difference. First operand has 473 places, 584 transitions, 7164 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:14:03,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 613 transitions, 8690 flow [2024-06-27 20:14:10,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 613 transitions, 8477 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:14:10,043 INFO L231 Difference]: Finished difference. Result has 476 places, 584 transitions, 7109 flow [2024-06-27 20:14:10,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6951, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7109, PETRI_PLACES=476, PETRI_TRANSITIONS=584} [2024-06-27 20:14:10,043 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-27 20:14:10,044 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 584 transitions, 7109 flow [2024-06-27 20:14:10,044 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 20:14:10,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:14:10,044 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 20:14:10,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:14:10,044 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:14:10,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:14:10,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1610619089, now seen corresponding path program 4 times [2024-06-27 20:14:10,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:14:10,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903821947] [2024-06-27 20:14:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:14:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:14:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat