./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:41:16,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:41:16,104 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:41:16,109 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:41:16,110 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:41:16,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:41:16,146 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:41:16,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:41:16,147 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:41:16,152 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:41:16,152 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:41:16,153 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:41:16,154 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:41:16,155 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:41:16,155 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:41:16,156 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:41:16,156 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:41:16,156 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:41:16,156 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:41:16,157 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:41:16,157 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:41:16,157 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:41:16,158 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:41:16,158 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:41:16,158 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:41:16,158 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:41:16,159 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:41:16,159 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:41:16,160 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:41:16,160 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:41:16,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:41:16,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:41:16,161 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:41:16,161 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:41:16,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:41:16,162 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:41:16,162 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:41:16,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:41:16,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:41:16,163 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:41:16,163 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:41:16,163 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:41:16,164 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:41:16,164 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:41:16,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:41:16,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:41:16,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:41:16,427 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:41:16,427 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:41:16,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-21 16:41:17,636 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:41:17,843 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:41:17,854 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix032.opt.i [2024-06-21 16:41:17,868 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f861ca9/9fa65b6d0ab64e4e9b7551f264e9150a/FLAG278b00f43 [2024-06-21 16:41:17,880 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68f861ca9/9fa65b6d0ab64e4e9b7551f264e9150a [2024-06-21 16:41:17,882 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:41:17,882 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:41:17,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix032.opt.yml/witness.yml [2024-06-21 16:41:18,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:41:18,086 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:41:18,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:41:18,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:41:18,092 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:41:18,093 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:41:17" (1/2) ... [2024-06-21 16:41:18,094 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df1b7a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:41:18, skipping insertion in model container [2024-06-21 16:41:18,095 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:41:17" (1/2) ... [2024-06-21 16:41:18,096 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@371ed5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:41:18, skipping insertion in model container [2024-06-21 16:41:18,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:18" (2/2) ... [2024-06-21 16:41:18,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df1b7a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18, skipping insertion in model container [2024-06-21 16:41:18,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:18" (2/2) ... [2024-06-21 16:41:18,097 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:41:18,200 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:41:18,201 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:41:18,202 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:41:18,202 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0) [2024-06-21 16:41:18,202 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:41:18,203 INFO L106 edCorrectnessWitness]: ghost_update [L846-L846] multithreaded = 1; [2024-06-21 16:41:18,248 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:41:18,659 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:41:18,669 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:41:18,794 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:41:18,841 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:41:18,841 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18 WrapperNode [2024-06-21 16:41:18,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:41:18,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:41:18,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:41:18,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:41:18,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,887 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,921 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 136 [2024-06-21 16:41:18,925 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:41:18,926 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:41:18,926 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:41:18,926 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:41:18,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,953 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,973 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:41:18,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,976 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:18,990 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:19,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:19,003 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:19,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:19,013 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:41:19,016 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:41:19,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:41:19,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:41:19,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (1/1) ... [2024-06-21 16:41:19,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:41:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:41:19,045 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:41:19,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:41:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:41:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:41:19,090 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:41:19,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:41:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:41:19,091 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:41:19,091 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:41:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:41:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:41:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:41:19,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:41:19,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:41:19,094 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:41:19,253 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:41:19,256 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:41:19,664 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:41:19,664 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:41:19,808 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:41:19,809 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:41:19,810 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:41:19 BoogieIcfgContainer [2024-06-21 16:41:19,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:41:19,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:41:19,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:41:19,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:41:19,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:41:17" (1/4) ... [2024-06-21 16:41:19,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a2d86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:41:19, skipping insertion in model container [2024-06-21 16:41:19,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:18" (2/4) ... [2024-06-21 16:41:19,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a2d86d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:41:19, skipping insertion in model container [2024-06-21 16:41:19,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:18" (3/4) ... [2024-06-21 16:41:19,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a2d86d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:41:19, skipping insertion in model container [2024-06-21 16:41:19,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:41:19" (4/4) ... [2024-06-21 16:41:19,820 INFO L112 eAbstractionObserver]: Analyzing ICFG mix032.opt.i [2024-06-21 16:41:19,834 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:41:19,834 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:41:19,834 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:41:19,888 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:41:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:41:19,951 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 16:41:19,951 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:41:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:41:19,954 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:41:19,956 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 16:41:19,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:41:19,971 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;@29e71eda, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:41:19,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:41:19,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:41:19,975 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:41:19,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:41:19,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:19,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:41:19,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:19,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash 373099719, now seen corresponding path program 1 times [2024-06-21 16:41:19,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:19,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069231158] [2024-06-21 16:41:19,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:19,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:21,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:21,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069231158] [2024-06-21 16:41:21,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069231158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:21,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:21,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:41:21,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432224886] [2024-06-21 16:41:21,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:21,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:41:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:41:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:41:21,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-21 16:41:21,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:21,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:21,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-21 16:41:21,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:21,807 INFO L124 PetriNetUnfolderBase]: 1059/1731 cut-off events. [2024-06-21 16:41:21,808 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-21 16:41:21,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3395 conditions, 1731 events. 1059/1731 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9218 event pairs, 698 based on Foata normal form. 1/1652 useless extension candidates. Maximal degree in co-relation 3383. Up to 1593 conditions per place. [2024-06-21 16:41:21,822 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 16:41:21,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-21 16:41:21,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:41:21,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:41:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 16:41:21,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-21 16:41:21,835 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-21 16:41:21,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-21 16:41:21,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:21,840 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 16:41:21,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:41:21,845 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 16:41:21,845 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 16:41:21,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:21,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:21,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:21,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:41:21,846 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:21,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:21,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2066583910, now seen corresponding path program 1 times [2024-06-21 16:41:21,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:21,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454729142] [2024-06-21 16:41:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:22,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:22,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454729142] [2024-06-21 16:41:22,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454729142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:22,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:22,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:41:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092222992] [2024-06-21 16:41:22,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:22,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:41:22,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:22,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:41:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:41:22,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-21 16:41:22,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:22,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:22,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-21 16:41:22,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:23,287 INFO L124 PetriNetUnfolderBase]: 1215/1930 cut-off events. [2024-06-21 16:41:23,287 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-21 16:41:23,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4341 conditions, 1930 events. 1215/1930 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10145 event pairs, 648 based on Foata normal form. 3/1906 useless extension candidates. Maximal degree in co-relation 4329. Up to 1803 conditions per place. [2024-06-21 16:41:23,301 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 16:41:23,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-21 16:41:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:41:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:41:23,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 16:41:23,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-21 16:41:23,307 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-21 16:41:23,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-21 16:41:23,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:41:23,311 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 16:41:23,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 16:41:23,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 16:41:23,312 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 16:41:23,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:23,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:23,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:23,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:41:23,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:23,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1541329897, now seen corresponding path program 1 times [2024-06-21 16:41:23,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566978322] [2024-06-21 16:41:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:24,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566978322] [2024-06-21 16:41:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566978322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:24,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:41:24,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563589696] [2024-06-21 16:41:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:41:24,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:41:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:41:25,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:41:25,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-21 16:41:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:41:25,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:25,495 INFO L124 PetriNetUnfolderBase]: 1545/2413 cut-off events. [2024-06-21 16:41:25,495 INFO L125 PetriNetUnfolderBase]: For 1270/1270 co-relation queries the response was YES. [2024-06-21 16:41:25,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5985 conditions, 2413 events. 1545/2413 cut-off events. For 1270/1270 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12392 event pairs, 575 based on Foata normal form. 6/2381 useless extension candidates. Maximal degree in co-relation 5971. Up to 2233 conditions per place. [2024-06-21 16:41:25,511 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 51 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-21 16:41:25,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 71 transitions, 356 flow [2024-06-21 16:41:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:25,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 16:41:25,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-21 16:41:25,513 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 6 states and 150 transitions. [2024-06-21 16:41:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 71 transitions, 356 flow [2024-06-21 16:41:25,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 16:41:25,516 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 185 flow [2024-06-21 16:41:25,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=122, 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=6, PETRI_FLOW=185, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-06-21 16:41:25,517 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 7 predicate places. [2024-06-21 16:41:25,517 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 185 flow [2024-06-21 16:41:25,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-21 16:41:25,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:25,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:25,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:41:25,518 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:25,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:25,519 INFO L85 PathProgramCache]: Analyzing trace with hash 760140791, now seen corresponding path program 1 times [2024-06-21 16:41:25,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:25,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28045892] [2024-06-21 16:41:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:25,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28045892] [2024-06-21 16:41:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28045892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:26,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:41:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092758487] [2024-06-21 16:41:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:41:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:41:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:41:26,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:41:26,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 185 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:26,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:26,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:41:26,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:26,931 INFO L124 PetriNetUnfolderBase]: 1333/2159 cut-off events. [2024-06-21 16:41:26,931 INFO L125 PetriNetUnfolderBase]: For 2120/2120 co-relation queries the response was YES. [2024-06-21 16:41:26,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5813 conditions, 2159 events. 1333/2159 cut-off events. For 2120/2120 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11356 event pairs, 592 based on Foata normal form. 2/2113 useless extension candidates. Maximal degree in co-relation 5796. Up to 1980 conditions per place. [2024-06-21 16:41:26,945 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 43 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2024-06-21 16:41:26,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 59 transitions, 329 flow [2024-06-21 16:41:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:41:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:41:26,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 16:41:26,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:41:26,947 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 185 flow. Second operand 5 states and 110 transitions. [2024-06-21 16:41:26,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 59 transitions, 329 flow [2024-06-21 16:41:26,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 59 transitions, 302 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:26,951 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 202 flow [2024-06-21 16:41:26,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-21 16:41:26,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-21 16:41:26,952 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 202 flow [2024-06-21 16:41:26,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:26,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:26,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:41:26,953 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)] === [2024-06-21 16:41:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2077910643, now seen corresponding path program 1 times [2024-06-21 16:41:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:26,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864088891] [2024-06-21 16:41:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:27,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:27,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864088891] [2024-06-21 16:41:27,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864088891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:27,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:27,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:27,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106849482] [2024-06-21 16:41:27,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:27,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:27,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:27,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:27,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:27,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:27,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:28,591 INFO L124 PetriNetUnfolderBase]: 1571/2550 cut-off events. [2024-06-21 16:41:28,592 INFO L125 PetriNetUnfolderBase]: For 3658/3658 co-relation queries the response was YES. [2024-06-21 16:41:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 2550 events. 1571/2550 cut-off events. For 3658/3658 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13586 event pairs, 706 based on Foata normal form. 2/2526 useless extension candidates. Maximal degree in co-relation 7274. Up to 2317 conditions per place. [2024-06-21 16:41:28,608 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-21 16:41:28,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 376 flow [2024-06-21 16:41:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:28,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:41:28,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:41:28,610 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 202 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:41:28,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 376 flow [2024-06-21 16:41:28,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 356 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:28,614 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 236 flow [2024-06-21 16:41:28,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-21 16:41:28,615 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-21 16:41:28,615 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 236 flow [2024-06-21 16:41:28,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:28,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:28,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:28,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:41:28,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:28,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash 944682456, now seen corresponding path program 1 times [2024-06-21 16:41:28,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:28,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056434973] [2024-06-21 16:41:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:29,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056434973] [2024-06-21 16:41:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056434973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:29,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:29,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214549551] [2024-06-21 16:41:29,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:29,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:29,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:29,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:29,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 236 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:29,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:29,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:29,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:30,271 INFO L124 PetriNetUnfolderBase]: 1718/2720 cut-off events. [2024-06-21 16:41:30,271 INFO L125 PetriNetUnfolderBase]: For 6155/6161 co-relation queries the response was YES. [2024-06-21 16:41:30,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2720 events. 1718/2720 cut-off events. For 6155/6161 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14275 event pairs, 749 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 8504. Up to 2498 conditions per place. [2024-06-21 16:41:30,290 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 16:41:30,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 484 flow [2024-06-21 16:41:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:30,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-21 16:41:30,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:41:30,292 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 236 flow. Second operand 6 states and 132 transitions. [2024-06-21 16:41:30,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 484 flow [2024-06-21 16:41:30,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 454 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:30,299 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 292 flow [2024-06-21 16:41:30,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-21 16:41:30,302 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-21 16:41:30,303 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 292 flow [2024-06-21 16:41:30,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:30,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:30,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:41:30,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:30,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 363399090, now seen corresponding path program 2 times [2024-06-21 16:41:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:30,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253144141] [2024-06-21 16:41:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:31,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:31,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253144141] [2024-06-21 16:41:31,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253144141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:31,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259438424] [2024-06-21 16:41:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:31,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:31,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:31,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:31,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:31,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:31,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:31,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:31,825 INFO L124 PetriNetUnfolderBase]: 1713/2714 cut-off events. [2024-06-21 16:41:31,826 INFO L125 PetriNetUnfolderBase]: For 8331/8337 co-relation queries the response was YES. [2024-06-21 16:41:31,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9126 conditions, 2714 events. 1713/2714 cut-off events. For 8331/8337 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14268 event pairs, 752 based on Foata normal form. 6/2702 useless extension candidates. Maximal degree in co-relation 9105. Up to 2493 conditions per place. [2024-06-21 16:41:31,851 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 16 changer transitions 0/72 dead transitions. [2024-06-21 16:41:31,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 458 flow [2024-06-21 16:41:31,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:31,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 16:41:31,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-21 16:41:31,853 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 292 flow. Second operand 6 states and 127 transitions. [2024-06-21 16:41:31,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 458 flow [2024-06-21 16:41:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 72 transitions, 424 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 16:41:31,859 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 298 flow [2024-06-21 16:41:31,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-21 16:41:31,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-21 16:41:31,861 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 298 flow [2024-06-21 16:41:31,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:31,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:41:31,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:31,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:31,862 INFO L85 PathProgramCache]: Analyzing trace with hash 350894806, now seen corresponding path program 1 times [2024-06-21 16:41:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964937316] [2024-06-21 16:41:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:32,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:32,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964937316] [2024-06-21 16:41:32,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964937316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:32,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:32,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:32,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731570783] [2024-06-21 16:41:32,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:32,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:32,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:32,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:32,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:32,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 298 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:33,706 INFO L124 PetriNetUnfolderBase]: 1567/2569 cut-off events. [2024-06-21 16:41:33,706 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2024-06-21 16:41:33,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2569 events. 1567/2569 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13753 event pairs, 652 based on Foata normal form. 4/2560 useless extension candidates. Maximal degree in co-relation 8501. Up to 2294 conditions per place. [2024-06-21 16:41:33,719 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 14 changer transitions 0/80 dead transitions. [2024-06-21 16:41:33,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 518 flow [2024-06-21 16:41:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:41:33,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-21 16:41:33,721 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 298 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:41:33,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 518 flow [2024-06-21 16:41:33,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 474 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:33,728 INFO L231 Difference]: Finished difference. Result has 64 places, 60 transitions, 320 flow [2024-06-21 16:41:33,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=320, PETRI_PLACES=64, PETRI_TRANSITIONS=60} [2024-06-21 16:41:33,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 19 predicate places. [2024-06-21 16:41:33,731 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 60 transitions, 320 flow [2024-06-21 16:41:33,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:33,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:33,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:33,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:41:33,732 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:33,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2013841752, now seen corresponding path program 1 times [2024-06-21 16:41:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729306666] [2024-06-21 16:41:33,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:33,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:34,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:34,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:34,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729306666] [2024-06-21 16:41:34,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729306666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:34,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:34,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:34,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219757113] [2024-06-21 16:41:34,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:34,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:34,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:34,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:34,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:34,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:34,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 60 transitions, 320 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:34,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:34,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:34,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:35,437 INFO L124 PetriNetUnfolderBase]: 1714/2731 cut-off events. [2024-06-21 16:41:35,438 INFO L125 PetriNetUnfolderBase]: For 12078/12078 co-relation queries the response was YES. [2024-06-21 16:41:35,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9853 conditions, 2731 events. 1714/2731 cut-off events. For 12078/12078 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14407 event pairs, 700 based on Foata normal form. 2/2719 useless extension candidates. Maximal degree in co-relation 9830. Up to 2498 conditions per place. [2024-06-21 16:41:35,455 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 66 selfloop transitions, 14 changer transitions 0/88 dead transitions. [2024-06-21 16:41:35,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 570 flow [2024-06-21 16:41:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 16:41:35,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 16:41:35,460 INFO L175 Difference]: Start difference. First operand has 64 places, 60 transitions, 320 flow. Second operand 7 states and 150 transitions. [2024-06-21 16:41:35,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 570 flow [2024-06-21 16:41:35,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 88 transitions, 528 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:35,470 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 346 flow [2024-06-21 16:41:35,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-21 16:41:35,471 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-21 16:41:35,472 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 346 flow [2024-06-21 16:41:35,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:35,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:35,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:35,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:41:35,473 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:35,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -779614030, now seen corresponding path program 2 times [2024-06-21 16:41:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:35,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330589334] [2024-06-21 16:41:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:35,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:36,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:36,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330589334] [2024-06-21 16:41:36,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330589334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:36,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:36,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:36,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129076890] [2024-06-21 16:41:36,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:36,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:36,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:36,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:36,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:36,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 346 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:36,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:36,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:36,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:37,164 INFO L124 PetriNetUnfolderBase]: 1723/2755 cut-off events. [2024-06-21 16:41:37,165 INFO L125 PetriNetUnfolderBase]: For 15307/15313 co-relation queries the response was YES. [2024-06-21 16:41:37,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10506 conditions, 2755 events. 1723/2755 cut-off events. For 15307/15313 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14648 event pairs, 702 based on Foata normal form. 6/2746 useless extension candidates. Maximal degree in co-relation 10482. Up to 2465 conditions per place. [2024-06-21 16:41:37,184 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 59 selfloop transitions, 26 changer transitions 0/93 dead transitions. [2024-06-21 16:41:37,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 676 flow [2024-06-21 16:41:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 16:41:37,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-21 16:41:37,187 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 346 flow. Second operand 7 states and 153 transitions. [2024-06-21 16:41:37,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 676 flow [2024-06-21 16:41:37,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 632 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:37,197 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 432 flow [2024-06-21 16:41:37,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-21 16:41:37,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 23 predicate places. [2024-06-21 16:41:37,201 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 432 flow [2024-06-21 16:41:37,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:37,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:37,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:37,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:41:37,202 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:37,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1819897506, now seen corresponding path program 1 times [2024-06-21 16:41:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:37,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771449543] [2024-06-21 16:41:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:38,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:38,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771449543] [2024-06-21 16:41:38,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771449543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:38,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:38,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:38,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176059344] [2024-06-21 16:41:38,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:38,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:38,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:38,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:38,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:38,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:38,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:38,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:38,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:39,033 INFO L124 PetriNetUnfolderBase]: 1844/2880 cut-off events. [2024-06-21 16:41:39,033 INFO L125 PetriNetUnfolderBase]: For 19027/19033 co-relation queries the response was YES. [2024-06-21 16:41:39,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11568 conditions, 2880 events. 1844/2880 cut-off events. For 19027/19033 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14817 event pairs, 752 based on Foata normal form. 3/2867 useless extension candidates. Maximal degree in co-relation 11543. Up to 2651 conditions per place. [2024-06-21 16:41:39,050 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 23 changer transitions 0/99 dead transitions. [2024-06-21 16:41:39,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 99 transitions, 774 flow [2024-06-21 16:41:39,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 16:41:39,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:41:39,053 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 432 flow. Second operand 7 states and 147 transitions. [2024-06-21 16:41:39,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 99 transitions, 774 flow [2024-06-21 16:41:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 99 transitions, 732 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:39,065 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 506 flow [2024-06-21 16:41:39,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-21 16:41:39,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 27 predicate places. [2024-06-21 16:41:39,066 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 506 flow [2024-06-21 16:41:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:39,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:39,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:39,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:41:39,067 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:39,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -402280294, now seen corresponding path program 2 times [2024-06-21 16:41:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:39,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497862949] [2024-06-21 16:41:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:39,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:39,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497862949] [2024-06-21 16:41:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497862949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:39,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199944653] [2024-06-21 16:41:39,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:39,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:39,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:39,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:39,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 506 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:39,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:39,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:39,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:40,700 INFO L124 PetriNetUnfolderBase]: 1855/2897 cut-off events. [2024-06-21 16:41:40,700 INFO L125 PetriNetUnfolderBase]: For 22580/22586 co-relation queries the response was YES. [2024-06-21 16:41:40,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12292 conditions, 2897 events. 1855/2897 cut-off events. For 22580/22586 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14901 event pairs, 751 based on Foata normal form. 6/2886 useless extension candidates. Maximal degree in co-relation 12265. Up to 2663 conditions per place. [2024-06-21 16:41:40,718 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 66 selfloop transitions, 27 changer transitions 0/99 dead transitions. [2024-06-21 16:41:40,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 99 transitions, 822 flow [2024-06-21 16:41:40,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:41:40,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:41:40,720 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 506 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:41:40,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 99 transitions, 822 flow [2024-06-21 16:41:40,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 99 transitions, 786 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:40,733 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 566 flow [2024-06-21 16:41:40,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=566, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-21 16:41:40,734 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-21 16:41:40,734 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 566 flow [2024-06-21 16:41:40,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:40,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:40,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:40,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:41:40,735 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:40,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:40,736 INFO L85 PathProgramCache]: Analyzing trace with hash -287875014, now seen corresponding path program 3 times [2024-06-21 16:41:40,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:40,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222803152] [2024-06-21 16:41:40,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:40,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:40,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:41,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222803152] [2024-06-21 16:41:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222803152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:41,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:41,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643635145] [2024-06-21 16:41:41,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:41,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:41,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 566 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:41,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:41,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:41,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:42,385 INFO L124 PetriNetUnfolderBase]: 1747/2784 cut-off events. [2024-06-21 16:41:42,385 INFO L125 PetriNetUnfolderBase]: For 25428/25431 co-relation queries the response was YES. [2024-06-21 16:41:42,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12140 conditions, 2784 events. 1747/2784 cut-off events. For 25428/25431 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14667 event pairs, 706 based on Foata normal form. 2/2767 useless extension candidates. Maximal degree in co-relation 12111. Up to 2487 conditions per place. [2024-06-21 16:41:42,405 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 60 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 16:41:42,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 786 flow [2024-06-21 16:41:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 16:41:42,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 16:41:42,407 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 566 flow. Second operand 7 states and 148 transitions. [2024-06-21 16:41:42,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 786 flow [2024-06-21 16:41:42,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 702 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:42,426 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 542 flow [2024-06-21 16:41:42,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-21 16:41:42,427 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 34 predicate places. [2024-06-21 16:41:42,427 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 542 flow [2024-06-21 16:41:42,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:42,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:42,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:42,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:41:42,428 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:42,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:42,429 INFO L85 PathProgramCache]: Analyzing trace with hash -287874828, now seen corresponding path program 3 times [2024-06-21 16:41:42,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:42,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395508198] [2024-06-21 16:41:42,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:42,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:43,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:43,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395508198] [2024-06-21 16:41:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395508198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:43,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:43,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:43,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152655159] [2024-06-21 16:41:43,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:43,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:43,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:43,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:43,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:43,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:43,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:44,060 INFO L124 PetriNetUnfolderBase]: 1845/2883 cut-off events. [2024-06-21 16:41:44,060 INFO L125 PetriNetUnfolderBase]: For 28324/28330 co-relation queries the response was YES. [2024-06-21 16:41:44,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12737 conditions, 2883 events. 1845/2883 cut-off events. For 28324/28330 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14863 event pairs, 751 based on Foata normal form. 6/2872 useless extension candidates. Maximal degree in co-relation 12707. Up to 2651 conditions per place. [2024-06-21 16:41:44,077 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 65 selfloop transitions, 26 changer transitions 0/97 dead transitions. [2024-06-21 16:41:44,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 97 transitions, 772 flow [2024-06-21 16:41:44,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:44,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:44,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:41:44,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 16:41:44,079 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 542 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:41:44,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 97 transitions, 772 flow [2024-06-21 16:41:44,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 97 transitions, 688 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:44,100 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 518 flow [2024-06-21 16:41:44,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=518, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2024-06-21 16:41:44,101 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-21 16:41:44,101 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 518 flow [2024-06-21 16:41:44,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:44,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:44,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:44,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:41:44,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:44,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:44,102 INFO L85 PathProgramCache]: Analyzing trace with hash -870723043, now seen corresponding path program 1 times [2024-06-21 16:41:44,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:44,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700655113] [2024-06-21 16:41:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:44,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:44,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700655113] [2024-06-21 16:41:44,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700655113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:44,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:44,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:41:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143884634] [2024-06-21 16:41:44,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:44,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:41:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:41:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:41:45,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:41:45,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 518 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:45,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:45,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:41:45,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:45,389 INFO L124 PetriNetUnfolderBase]: 1386/2407 cut-off events. [2024-06-21 16:41:45,390 INFO L125 PetriNetUnfolderBase]: For 26296/26296 co-relation queries the response was YES. [2024-06-21 16:41:45,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 2407 events. 1386/2407 cut-off events. For 26296/26296 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13759 event pairs, 588 based on Foata normal form. 1/2393 useless extension candidates. Maximal degree in co-relation 10562. Up to 2045 conditions per place. [2024-06-21 16:41:45,402 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 62 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-21 16:41:45,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 89 transitions, 698 flow [2024-06-21 16:41:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:41:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:41:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 16:41:45,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:41:45,403 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 518 flow. Second operand 5 states and 110 transitions. [2024-06-21 16:41:45,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 89 transitions, 698 flow [2024-06-21 16:41:45,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 624 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:45,423 INFO L231 Difference]: Finished difference. Result has 78 places, 81 transitions, 492 flow [2024-06-21 16:41:45,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=78, PETRI_TRANSITIONS=81} [2024-06-21 16:41:45,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-21 16:41:45,424 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 81 transitions, 492 flow [2024-06-21 16:41:45,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:45,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:45,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:45,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:41:45,425 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:45,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1534018644, now seen corresponding path program 1 times [2024-06-21 16:41:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:45,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710865517] [2024-06-21 16:41:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710865517] [2024-06-21 16:41:46,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710865517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:46,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:46,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:46,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552782088] [2024-06-21 16:41:46,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:46,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:46,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:46,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:46,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:46,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:46,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 81 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:46,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:46,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:46,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:47,284 INFO L124 PetriNetUnfolderBase]: 1853/2893 cut-off events. [2024-06-21 16:41:47,284 INFO L125 PetriNetUnfolderBase]: For 34682/34682 co-relation queries the response was YES. [2024-06-21 16:41:47,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13475 conditions, 2893 events. 1853/2893 cut-off events. For 34682/34682 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14821 event pairs, 722 based on Foata normal form. 2/2892 useless extension candidates. Maximal degree in co-relation 13443. Up to 2693 conditions per place. [2024-06-21 16:41:47,303 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 90 selfloop transitions, 17 changer transitions 0/113 dead transitions. [2024-06-21 16:41:47,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 113 transitions, 816 flow [2024-06-21 16:41:47,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:41:47,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:41:47,308 INFO L175 Difference]: Start difference. First operand has 78 places, 81 transitions, 492 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:41:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 113 transitions, 816 flow [2024-06-21 16:41:47,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 113 transitions, 790 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:47,332 INFO L231 Difference]: Finished difference. Result has 83 places, 84 transitions, 550 flow [2024-06-21 16:41:47,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=550, PETRI_PLACES=83, PETRI_TRANSITIONS=84} [2024-06-21 16:41:47,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 38 predicate places. [2024-06-21 16:41:47,333 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 84 transitions, 550 flow [2024-06-21 16:41:47,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:47,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:47,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:41:47,334 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:47,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:47,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1601775735, now seen corresponding path program 1 times [2024-06-21 16:41:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:47,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152501426] [2024-06-21 16:41:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:47,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:48,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:48,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152501426] [2024-06-21 16:41:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152501426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:48,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:48,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237105174] [2024-06-21 16:41:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:48,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:48,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 84 transitions, 550 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:48,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:48,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:48,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:49,125 INFO L124 PetriNetUnfolderBase]: 1875/2929 cut-off events. [2024-06-21 16:41:49,125 INFO L125 PetriNetUnfolderBase]: For 39993/39996 co-relation queries the response was YES. [2024-06-21 16:41:49,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14261 conditions, 2929 events. 1875/2929 cut-off events. For 39993/39996 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15014 event pairs, 680 based on Foata normal form. 4/2929 useless extension candidates. Maximal degree in co-relation 14228. Up to 2620 conditions per place. [2024-06-21 16:41:49,178 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 83 selfloop transitions, 32 changer transitions 0/121 dead transitions. [2024-06-21 16:41:49,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 986 flow [2024-06-21 16:41:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 16:41:49,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-21 16:41:49,179 INFO L175 Difference]: Start difference. First operand has 83 places, 84 transitions, 550 flow. Second operand 8 states and 170 transitions. [2024-06-21 16:41:49,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 986 flow [2024-06-21 16:41:49,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 926 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:49,199 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 636 flow [2024-06-21 16:41:49,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=636, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-21 16:41:49,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-21 16:41:49,200 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 636 flow [2024-06-21 16:41:49,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:49,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:49,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:41:49,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:49,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1601775518, now seen corresponding path program 2 times [2024-06-21 16:41:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722318647] [2024-06-21 16:41:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:50,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:50,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722318647] [2024-06-21 16:41:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722318647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:50,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:50,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831782697] [2024-06-21 16:41:50,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:50,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:50,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:50,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 636 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:51,059 INFO L124 PetriNetUnfolderBase]: 1902/2972 cut-off events. [2024-06-21 16:41:51,060 INFO L125 PetriNetUnfolderBase]: For 45964/45967 co-relation queries the response was YES. [2024-06-21 16:41:51,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2972 events. 1902/2972 cut-off events. For 45964/45967 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15271 event pairs, 708 based on Foata normal form. 2/2970 useless extension candidates. Maximal degree in co-relation 15119. Up to 2642 conditions per place. [2024-06-21 16:41:51,075 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 44 changer transitions 0/129 dead transitions. [2024-06-21 16:41:51,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 1220 flow [2024-06-21 16:41:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 16:41:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-21 16:41:51,077 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 636 flow. Second operand 8 states and 170 transitions. [2024-06-21 16:41:51,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 1220 flow [2024-06-21 16:41:51,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 1172 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:51,102 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 822 flow [2024-06-21 16:41:51,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=822, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-21 16:41:51,103 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-21 16:41:51,103 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 822 flow [2024-06-21 16:41:51,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:51,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:51,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:51,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:41:51,104 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:51,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:51,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1601769938, now seen corresponding path program 3 times [2024-06-21 16:41:51,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:51,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868262537] [2024-06-21 16:41:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:51,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:52,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:52,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868262537] [2024-06-21 16:41:52,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868262537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:52,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141217131] [2024-06-21 16:41:52,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:52,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:52,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:52,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:52,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:52,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:52,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:52,934 INFO L124 PetriNetUnfolderBase]: 1897/2965 cut-off events. [2024-06-21 16:41:52,935 INFO L125 PetriNetUnfolderBase]: For 51509/51512 co-relation queries the response was YES. [2024-06-21 16:41:52,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15758 conditions, 2965 events. 1897/2965 cut-off events. For 51509/51512 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15247 event pairs, 713 based on Foata normal form. 2/2963 useless extension candidates. Maximal degree in co-relation 15722. Up to 2637 conditions per place. [2024-06-21 16:41:52,948 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 78 selfloop transitions, 43 changer transitions 0/127 dead transitions. [2024-06-21 16:41:52,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 127 transitions, 1204 flow [2024-06-21 16:41:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 16:41:52,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 16:41:52,950 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 822 flow. Second operand 8 states and 169 transitions. [2024-06-21 16:41:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 127 transitions, 1204 flow [2024-06-21 16:41:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 127 transitions, 1120 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:52,983 INFO L231 Difference]: Finished difference. Result has 94 places, 99 transitions, 832 flow [2024-06-21 16:41:52,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=832, PETRI_PLACES=94, PETRI_TRANSITIONS=99} [2024-06-21 16:41:52,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-21 16:41:52,984 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 99 transitions, 832 flow [2024-06-21 16:41:52,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:52,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:52,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:41:52,985 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:52,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1341828049, now seen corresponding path program 2 times [2024-06-21 16:41:52,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:52,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008987587] [2024-06-21 16:41:52,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:52,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008987587] [2024-06-21 16:41:53,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008987587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:53,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:53,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:53,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457290558] [2024-06-21 16:41:53,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:53,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:54,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:54,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 99 transitions, 832 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:54,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:54,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:54,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:54,848 INFO L124 PetriNetUnfolderBase]: 1919/3003 cut-off events. [2024-06-21 16:41:54,848 INFO L125 PetriNetUnfolderBase]: For 56763/56769 co-relation queries the response was YES. [2024-06-21 16:41:54,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16247 conditions, 3003 events. 1919/3003 cut-off events. For 56763/56769 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15494 event pairs, 671 based on Foata normal form. 8/3006 useless extension candidates. Maximal degree in co-relation 16209. Up to 2671 conditions per place. [2024-06-21 16:41:54,863 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 85 selfloop transitions, 38 changer transitions 0/129 dead transitions. [2024-06-21 16:41:54,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 129 transitions, 1258 flow [2024-06-21 16:41:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:41:54,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:41:54,864 INFO L175 Difference]: Start difference. First operand has 94 places, 99 transitions, 832 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:41:54,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 129 transitions, 1258 flow [2024-06-21 16:41:54,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 1170 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:54,890 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 868 flow [2024-06-21 16:41:54,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=868, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-21 16:41:54,891 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-21 16:41:54,891 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 868 flow [2024-06-21 16:41:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:54,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:54,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:54,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:41:54,892 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)] === [2024-06-21 16:41:54,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash -326832520, now seen corresponding path program 4 times [2024-06-21 16:41:54,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:54,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755250549] [2024-06-21 16:41:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:54,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:55,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:55,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755250549] [2024-06-21 16:41:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755250549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:55,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:55,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427364478] [2024-06-21 16:41:55,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:55,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:55,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:55,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:55,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:55,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:55,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 868 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:55,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:55,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:55,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:56,642 INFO L124 PetriNetUnfolderBase]: 1930/3021 cut-off events. [2024-06-21 16:41:56,642 INFO L125 PetriNetUnfolderBase]: For 61778/61781 co-relation queries the response was YES. [2024-06-21 16:41:56,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16631 conditions, 3021 events. 1930/3021 cut-off events. For 61778/61781 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15583 event pairs, 719 based on Foata normal form. 2/3016 useless extension candidates. Maximal degree in co-relation 16592. Up to 2681 conditions per place. [2024-06-21 16:41:56,657 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 49 changer transitions 0/130 dead transitions. [2024-06-21 16:41:56,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1309 flow [2024-06-21 16:41:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:41:56,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:41:56,658 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 868 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:41:56,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1309 flow [2024-06-21 16:41:56,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 130 transitions, 1212 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:56,690 INFO L231 Difference]: Finished difference. Result has 99 places, 105 transitions, 930 flow [2024-06-21 16:41:56,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=930, PETRI_PLACES=99, PETRI_TRANSITIONS=105} [2024-06-21 16:41:56,690 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 54 predicate places. [2024-06-21 16:41:56,690 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 105 transitions, 930 flow [2024-06-21 16:41:56,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:56,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:56,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:56,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:41:56,691 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:56,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:56,691 INFO L85 PathProgramCache]: Analyzing trace with hash 26133267, now seen corresponding path program 3 times [2024-06-21 16:41:56,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:56,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969597407] [2024-06-21 16:41:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:56,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:57,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969597407] [2024-06-21 16:41:57,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969597407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:57,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:57,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:57,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147557552] [2024-06-21 16:41:57,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:57,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:57,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:57,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:57,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:57,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:57,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 105 transitions, 930 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:57,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:58,529 INFO L124 PetriNetUnfolderBase]: 1952/3056 cut-off events. [2024-06-21 16:41:58,530 INFO L125 PetriNetUnfolderBase]: For 67294/67300 co-relation queries the response was YES. [2024-06-21 16:41:58,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16950 conditions, 3056 events. 1952/3056 cut-off events. For 67294/67300 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15729 event pairs, 671 based on Foata normal form. 8/3059 useless extension candidates. Maximal degree in co-relation 16910. Up to 2706 conditions per place. [2024-06-21 16:41:58,547 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 38 changer transitions 0/136 dead transitions. [2024-06-21 16:41:58,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 136 transitions, 1373 flow [2024-06-21 16:41:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:58,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:41:58,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:41:58,549 INFO L175 Difference]: Start difference. First operand has 99 places, 105 transitions, 930 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:41:58,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 136 transitions, 1373 flow [2024-06-21 16:41:58,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 136 transitions, 1260 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:58,584 INFO L231 Difference]: Finished difference. Result has 102 places, 108 transitions, 934 flow [2024-06-21 16:41:58,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=102, PETRI_TRANSITIONS=108} [2024-06-21 16:41:58,584 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 57 predicate places. [2024-06-21 16:41:58,584 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 108 transitions, 934 flow [2024-06-21 16:41:58,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:58,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:58,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:58,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:41:58,585 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:58,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1745660468, now seen corresponding path program 5 times [2024-06-21 16:41:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:58,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629386205] [2024-06-21 16:41:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:59,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629386205] [2024-06-21 16:41:59,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629386205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:59,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:59,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162421388] [2024-06-21 16:41:59,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:59,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:59,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:59,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:41:59,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 108 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:59,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:59,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:41:59,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:00,295 INFO L124 PetriNetUnfolderBase]: 1963/3074 cut-off events. [2024-06-21 16:42:00,295 INFO L125 PetriNetUnfolderBase]: For 72411/72414 co-relation queries the response was YES. [2024-06-21 16:42:00,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17281 conditions, 3074 events. 1963/3074 cut-off events. For 72411/72414 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15860 event pairs, 719 based on Foata normal form. 2/3069 useless extension candidates. Maximal degree in co-relation 17240. Up to 2725 conditions per place. [2024-06-21 16:42:00,313 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 80 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-21 16:42:00,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 136 transitions, 1392 flow [2024-06-21 16:42:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:00,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:00,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:42:00,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 16:42:00,314 INFO L175 Difference]: Start difference. First operand has 102 places, 108 transitions, 934 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:42:00,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 136 transitions, 1392 flow [2024-06-21 16:42:00,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 136 transitions, 1294 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:00,361 INFO L231 Difference]: Finished difference. Result has 104 places, 111 transitions, 994 flow [2024-06-21 16:42:00,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=994, PETRI_PLACES=104, PETRI_TRANSITIONS=111} [2024-06-21 16:42:00,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 16:42:00,362 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 111 transitions, 994 flow [2024-06-21 16:42:00,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:00,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:00,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:42:00,363 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:00,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:00,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2100099556, now seen corresponding path program 6 times [2024-06-21 16:42:00,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:00,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76918548] [2024-06-21 16:42:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:00,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:01,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76918548] [2024-06-21 16:42:01,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76918548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:01,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:01,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:01,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615230036] [2024-06-21 16:42:01,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:01,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:01,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:01,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 111 transitions, 994 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:01,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:01,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:01,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:02,084 INFO L124 PetriNetUnfolderBase]: 1958/3067 cut-off events. [2024-06-21 16:42:02,084 INFO L125 PetriNetUnfolderBase]: For 77190/77193 co-relation queries the response was YES. [2024-06-21 16:42:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17425 conditions, 3067 events. 1958/3067 cut-off events. For 77190/77193 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15810 event pairs, 719 based on Foata normal form. 2/3062 useless extension candidates. Maximal degree in co-relation 17383. Up to 2720 conditions per place. [2024-06-21 16:42:02,102 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 79 selfloop transitions, 49 changer transitions 0/134 dead transitions. [2024-06-21 16:42:02,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 134 transitions, 1308 flow [2024-06-21 16:42:02,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:42:02,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:42:02,103 INFO L175 Difference]: Start difference. First operand has 104 places, 111 transitions, 994 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:42:02,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 134 transitions, 1308 flow [2024-06-21 16:42:02,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1112 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:02,167 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 904 flow [2024-06-21 16:42:02,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=798, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=904, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-21 16:42:02,168 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-21 16:42:02,168 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 904 flow [2024-06-21 16:42:02,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:02,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:02,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:02,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:42:02,168 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:02,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:02,168 INFO L85 PathProgramCache]: Analyzing trace with hash -326832303, now seen corresponding path program 4 times [2024-06-21 16:42:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819409597] [2024-06-21 16:42:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:02,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:03,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:03,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819409597] [2024-06-21 16:42:03,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819409597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:03,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:03,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:03,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701106840] [2024-06-21 16:42:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:03,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:03,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:03,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:03,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 904 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:03,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:03,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:03,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:03,954 INFO L124 PetriNetUnfolderBase]: 1948/3056 cut-off events. [2024-06-21 16:42:03,955 INFO L125 PetriNetUnfolderBase]: For 81578/81584 co-relation queries the response was YES. [2024-06-21 16:42:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17425 conditions, 3056 events. 1948/3056 cut-off events. For 81578/81584 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15760 event pairs, 669 based on Foata normal form. 8/3059 useless extension candidates. Maximal degree in co-relation 17382. Up to 2707 conditions per place. [2024-06-21 16:42:03,972 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 92 selfloop transitions, 39 changer transitions 0/137 dead transitions. [2024-06-21 16:42:03,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 137 transitions, 1230 flow [2024-06-21 16:42:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:42:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:42:03,974 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 904 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:42:03,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 137 transitions, 1230 flow [2024-06-21 16:42:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 137 transitions, 1078 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:04,027 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 838 flow [2024-06-21 16:42:04,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-21 16:42:04,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-21 16:42:04,028 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 838 flow [2024-06-21 16:42:04,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:04,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:04,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:04,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:42:04,028 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)] === [2024-06-21 16:42:04,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:04,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1222608917, now seen corresponding path program 1 times [2024-06-21 16:42:04,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:04,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244281922] [2024-06-21 16:42:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:04,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:04,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:04,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244281922] [2024-06-21 16:42:04,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244281922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:04,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:04,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:04,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489971923] [2024-06-21 16:42:04,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:04,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:04,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:04,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:04,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:04,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:04,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 838 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:04,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:04,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:04,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:05,320 INFO L124 PetriNetUnfolderBase]: 1678/2795 cut-off events. [2024-06-21 16:42:05,320 INFO L125 PetriNetUnfolderBase]: For 84369/84369 co-relation queries the response was YES. [2024-06-21 16:42:05,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16172 conditions, 2795 events. 1678/2795 cut-off events. For 84369/84369 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15572 event pairs, 666 based on Foata normal form. 1/2793 useless extension candidates. Maximal degree in co-relation 16128. Up to 2442 conditions per place. [2024-06-21 16:42:05,337 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 84 selfloop transitions, 11 changer transitions 0/123 dead transitions. [2024-06-21 16:42:05,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 123 transitions, 1074 flow [2024-06-21 16:42:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-21 16:42:05,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:42:05,338 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 838 flow. Second operand 6 states and 123 transitions. [2024-06-21 16:42:05,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 123 transitions, 1074 flow [2024-06-21 16:42:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 123 transitions, 970 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:05,404 INFO L231 Difference]: Finished difference. Result has 103 places, 114 transitions, 792 flow [2024-06-21 16:42:05,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=792, PETRI_PLACES=103, PETRI_TRANSITIONS=114} [2024-06-21 16:42:05,404 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-21 16:42:05,404 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 114 transitions, 792 flow [2024-06-21 16:42:05,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:05,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:05,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:05,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:42:05,405 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:05,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash 637040847, now seen corresponding path program 1 times [2024-06-21 16:42:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:05,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167011527] [2024-06-21 16:42:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:06,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167011527] [2024-06-21 16:42:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167011527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:06,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380001815] [2024-06-21 16:42:06,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:06,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:06,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:06,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 114 transitions, 792 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:06,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:06,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:06,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:07,122 INFO L124 PetriNetUnfolderBase]: 1952/3094 cut-off events. [2024-06-21 16:42:07,122 INFO L125 PetriNetUnfolderBase]: For 107519/107519 co-relation queries the response was YES. [2024-06-21 16:42:07,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19076 conditions, 3094 events. 1952/3094 cut-off events. For 107519/107519 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16441 event pairs, 501 based on Foata normal form. 4/3095 useless extension candidates. Maximal degree in co-relation 19031. Up to 2710 conditions per place. [2024-06-21 16:42:07,141 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 117 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-21 16:42:07,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 155 transitions, 1334 flow [2024-06-21 16:42:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:07,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:07,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 16:42:07,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-21 16:42:07,143 INFO L175 Difference]: Start difference. First operand has 103 places, 114 transitions, 792 flow. Second operand 9 states and 191 transitions. [2024-06-21 16:42:07,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 155 transitions, 1334 flow [2024-06-21 16:42:07,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1298 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:07,205 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 883 flow [2024-06-21 16:42:07,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=883, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-21 16:42:07,206 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-21 16:42:07,206 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 883 flow [2024-06-21 16:42:07,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:07,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:42:07,206 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -309941545, now seen corresponding path program 2 times [2024-06-21 16:42:07,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:07,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404904269] [2024-06-21 16:42:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404904269] [2024-06-21 16:42:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404904269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:08,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64033816] [2024-06-21 16:42:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:08,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:08,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 883 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:08,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:08,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:08,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:08,938 INFO L124 PetriNetUnfolderBase]: 1944/3082 cut-off events. [2024-06-21 16:42:08,938 INFO L125 PetriNetUnfolderBase]: For 114726/114726 co-relation queries the response was YES. [2024-06-21 16:42:08,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19428 conditions, 3082 events. 1944/3082 cut-off events. For 114726/114726 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16378 event pairs, 659 based on Foata normal form. 4/3083 useless extension candidates. Maximal degree in co-relation 19382. Up to 2757 conditions per place. [2024-06-21 16:42:08,958 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 114 selfloop transitions, 16 changer transitions 0/148 dead transitions. [2024-06-21 16:42:08,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1219 flow [2024-06-21 16:42:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 16:42:08,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 16:42:08,960 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 883 flow. Second operand 8 states and 169 transitions. [2024-06-21 16:42:08,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1219 flow [2024-06-21 16:42:09,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1135 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:09,023 INFO L231 Difference]: Finished difference. Result has 111 places, 118 transitions, 838 flow [2024-06-21 16:42:09,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=111, PETRI_TRANSITIONS=118} [2024-06-21 16:42:09,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-21 16:42:09,024 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 118 transitions, 838 flow [2024-06-21 16:42:09,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:09,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:09,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:09,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:42:09,025 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:09,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2000029521, now seen corresponding path program 1 times [2024-06-21 16:42:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263716410] [2024-06-21 16:42:09,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:10,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263716410] [2024-06-21 16:42:10,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263716410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:10,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:10,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607436886] [2024-06-21 16:42:10,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:10,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 118 transitions, 838 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:10,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:10,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:10,795 INFO L124 PetriNetUnfolderBase]: 2072/3223 cut-off events. [2024-06-21 16:42:10,795 INFO L125 PetriNetUnfolderBase]: For 124154/124154 co-relation queries the response was YES. [2024-06-21 16:42:10,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20378 conditions, 3223 events. 2072/3223 cut-off events. For 124154/124154 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 16716 event pairs, 683 based on Foata normal form. 4/3221 useless extension candidates. Maximal degree in co-relation 20330. Up to 2968 conditions per place. [2024-06-21 16:42:10,814 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 128 selfloop transitions, 20 changer transitions 0/155 dead transitions. [2024-06-21 16:42:10,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 155 transitions, 1268 flow [2024-06-21 16:42:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:42:10,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 16:42:10,816 INFO L175 Difference]: Start difference. First operand has 111 places, 118 transitions, 838 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:42:10,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 155 transitions, 1268 flow [2024-06-21 16:42:10,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1231 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:10,863 INFO L231 Difference]: Finished difference. Result has 113 places, 121 transitions, 903 flow [2024-06-21 16:42:10,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=903, PETRI_PLACES=113, PETRI_TRANSITIONS=121} [2024-06-21 16:42:10,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-21 16:42:10,864 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 121 transitions, 903 flow [2024-06-21 16:42:10,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:10,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:10,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:10,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:42:10,865 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)] === [2024-06-21 16:42:10,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:10,865 INFO L85 PathProgramCache]: Analyzing trace with hash -194650375, now seen corresponding path program 3 times [2024-06-21 16:42:10,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:10,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544606178] [2024-06-21 16:42:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:10,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:11,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544606178] [2024-06-21 16:42:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544606178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:11,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:11,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467940866] [2024-06-21 16:42:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:11,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:11,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:11,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:11,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:11,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:11,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 121 transitions, 903 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:11,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:11,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:12,629 INFO L124 PetriNetUnfolderBase]: 1980/3142 cut-off events. [2024-06-21 16:42:12,629 INFO L125 PetriNetUnfolderBase]: For 132684/132687 co-relation queries the response was YES. [2024-06-21 16:42:12,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20578 conditions, 3142 events. 1980/3142 cut-off events. For 132684/132687 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16673 event pairs, 642 based on Foata normal form. 6/3144 useless extension candidates. Maximal degree in co-relation 20529. Up to 2768 conditions per place. [2024-06-21 16:42:12,649 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 104 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-21 16:42:12,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 150 transitions, 1279 flow [2024-06-21 16:42:12,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-21 16:42:12,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2024-06-21 16:42:12,653 INFO L175 Difference]: Start difference. First operand has 113 places, 121 transitions, 903 flow. Second operand 8 states and 170 transitions. [2024-06-21 16:42:12,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 150 transitions, 1279 flow [2024-06-21 16:42:12,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1201 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:12,724 INFO L231 Difference]: Finished difference. Result has 114 places, 123 transitions, 936 flow [2024-06-21 16:42:12,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=114, PETRI_TRANSITIONS=123} [2024-06-21 16:42:12,725 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-21 16:42:12,725 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 936 flow [2024-06-21 16:42:12,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:12,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:12,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:42:12,726 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:12,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash -869784585, now seen corresponding path program 2 times [2024-06-21 16:42:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:12,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993435849] [2024-06-21 16:42:12,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:12,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:13,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:13,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993435849] [2024-06-21 16:42:13,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993435849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:13,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:13,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:13,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019144268] [2024-06-21 16:42:13,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:13,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:13,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:13,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:13,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 936 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:13,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:13,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:13,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:14,768 INFO L124 PetriNetUnfolderBase]: 2175/3399 cut-off events. [2024-06-21 16:42:14,768 INFO L125 PetriNetUnfolderBase]: For 148515/148518 co-relation queries the response was YES. [2024-06-21 16:42:14,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22615 conditions, 3399 events. 2175/3399 cut-off events. For 148515/148518 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17935 event pairs, 632 based on Foata normal form. 4/3399 useless extension candidates. Maximal degree in co-relation 22565. Up to 2763 conditions per place. [2024-06-21 16:42:14,789 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 101 selfloop transitions, 68 changer transitions 0/176 dead transitions. [2024-06-21 16:42:14,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 176 transitions, 1944 flow [2024-06-21 16:42:14,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:14,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 16:42:14,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5025252525252525 [2024-06-21 16:42:14,790 INFO L175 Difference]: Start difference. First operand has 114 places, 123 transitions, 936 flow. Second operand 9 states and 199 transitions. [2024-06-21 16:42:14,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 176 transitions, 1944 flow [2024-06-21 16:42:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 176 transitions, 1851 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:14,860 INFO L231 Difference]: Finished difference. Result has 117 places, 135 transitions, 1217 flow [2024-06-21 16:42:14,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1217, PETRI_PLACES=117, PETRI_TRANSITIONS=135} [2024-06-21 16:42:14,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-21 16:42:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 135 transitions, 1217 flow [2024-06-21 16:42:14,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:42:14,861 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:14,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:14,861 INFO L85 PathProgramCache]: Analyzing trace with hash -869778075, now seen corresponding path program 3 times [2024-06-21 16:42:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399975708] [2024-06-21 16:42:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:15,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:15,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399975708] [2024-06-21 16:42:15,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399975708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:15,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:15,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:15,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178676770] [2024-06-21 16:42:15,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:15,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:15,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:15,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:15,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:15,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 135 transitions, 1217 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:15,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:15,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:15,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:16,839 INFO L124 PetriNetUnfolderBase]: 2165/3390 cut-off events. [2024-06-21 16:42:16,840 INFO L125 PetriNetUnfolderBase]: For 157200/157203 co-relation queries the response was YES. [2024-06-21 16:42:16,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23121 conditions, 3390 events. 2165/3390 cut-off events. For 157200/157203 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17876 event pairs, 637 based on Foata normal form. 4/3390 useless extension candidates. Maximal degree in co-relation 23070. Up to 2755 conditions per place. [2024-06-21 16:42:16,860 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 70 changer transitions 0/173 dead transitions. [2024-06-21 16:42:16,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 173 transitions, 1881 flow [2024-06-21 16:42:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:16,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 16:42:16,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-21 16:42:16,862 INFO L175 Difference]: Start difference. First operand has 117 places, 135 transitions, 1217 flow. Second operand 9 states and 195 transitions. [2024-06-21 16:42:16,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 173 transitions, 1881 flow [2024-06-21 16:42:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 173 transitions, 1755 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:16,927 INFO L231 Difference]: Finished difference. Result has 123 places, 135 transitions, 1239 flow [2024-06-21 16:42:16,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1091, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1239, PETRI_PLACES=123, PETRI_TRANSITIONS=135} [2024-06-21 16:42:16,928 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-21 16:42:16,928 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 135 transitions, 1239 flow [2024-06-21 16:42:16,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:16,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:16,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:16,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:42:16,929 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:16,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:16,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1884738351, now seen corresponding path program 4 times [2024-06-21 16:42:16,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:16,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012094531] [2024-06-21 16:42:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:16,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:17,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:17,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012094531] [2024-06-21 16:42:17,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012094531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:17,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:17,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:17,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044595468] [2024-06-21 16:42:17,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:17,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:17,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:17,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:17,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:18,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:18,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 135 transitions, 1239 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:18,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:18,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:18,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:18,930 INFO L124 PetriNetUnfolderBase]: 2155/3376 cut-off events. [2024-06-21 16:42:18,930 INFO L125 PetriNetUnfolderBase]: For 163130/163133 co-relation queries the response was YES. [2024-06-21 16:42:18,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23233 conditions, 3376 events. 2155/3376 cut-off events. For 163130/163133 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17830 event pairs, 635 based on Foata normal form. 4/3376 useless extension candidates. Maximal degree in co-relation 23180. Up to 2747 conditions per place. [2024-06-21 16:42:18,948 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 67 changer transitions 0/172 dead transitions. [2024-06-21 16:42:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 172 transitions, 1783 flow [2024-06-21 16:42:18,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-21 16:42:18,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.494949494949495 [2024-06-21 16:42:18,949 INFO L175 Difference]: Start difference. First operand has 123 places, 135 transitions, 1239 flow. Second operand 9 states and 196 transitions. [2024-06-21 16:42:18,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 172 transitions, 1783 flow [2024-06-21 16:42:19,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1619 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:19,007 INFO L231 Difference]: Finished difference. Result has 125 places, 135 transitions, 1217 flow [2024-06-21 16:42:19,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1075, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1217, PETRI_PLACES=125, PETRI_TRANSITIONS=135} [2024-06-21 16:42:19,008 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-21 16:42:19,008 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 135 transitions, 1217 flow [2024-06-21 16:42:19,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:19,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:19,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:42:19,008 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)] === [2024-06-21 16:42:19,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:19,008 INFO L85 PathProgramCache]: Analyzing trace with hash 740482556, now seen corresponding path program 1 times [2024-06-21 16:42:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519147405] [2024-06-21 16:42:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:19,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:19,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:19,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519147405] [2024-06-21 16:42:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519147405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:19,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:19,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530396475] [2024-06-21 16:42:19,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:19,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:19,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 135 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:19,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:19,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:19,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:20,389 INFO L124 PetriNetUnfolderBase]: 1901/3114 cut-off events. [2024-06-21 16:42:20,389 INFO L125 PetriNetUnfolderBase]: For 170314/170322 co-relation queries the response was YES. [2024-06-21 16:42:20,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22280 conditions, 3114 events. 1901/3114 cut-off events. For 170314/170322 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17402 event pairs, 641 based on Foata normal form. 2/3096 useless extension candidates. Maximal degree in co-relation 22226. Up to 2711 conditions per place. [2024-06-21 16:42:20,410 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 111 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-21 16:42:20,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 153 transitions, 1535 flow [2024-06-21 16:42:20,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:20,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 16:42:20,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 16:42:20,412 INFO L175 Difference]: Start difference. First operand has 125 places, 135 transitions, 1217 flow. Second operand 6 states and 129 transitions. [2024-06-21 16:42:20,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 153 transitions, 1535 flow [2024-06-21 16:42:20,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 153 transitions, 1361 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 16:42:20,479 INFO L231 Difference]: Finished difference. Result has 122 places, 138 transitions, 1114 flow [2024-06-21 16:42:20,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1114, PETRI_PLACES=122, PETRI_TRANSITIONS=138} [2024-06-21 16:42:20,479 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 77 predicate places. [2024-06-21 16:42:20,479 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 138 transitions, 1114 flow [2024-06-21 16:42:20,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:20,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:20,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:20,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:42:20,480 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:20,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:20,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1769951495, now seen corresponding path program 4 times [2024-06-21 16:42:20,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:20,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589918479] [2024-06-21 16:42:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:21,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:21,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589918479] [2024-06-21 16:42:21,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589918479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:21,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:21,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378872363] [2024-06-21 16:42:21,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:21,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:21,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:21,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:21,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:21,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:21,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 138 transitions, 1114 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:21,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:21,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:21,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:22,223 INFO L124 PetriNetUnfolderBase]: 2069/3281 cut-off events. [2024-06-21 16:42:22,223 INFO L125 PetriNetUnfolderBase]: For 176623/176626 co-relation queries the response was YES. [2024-06-21 16:42:22,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23130 conditions, 3281 events. 2069/3281 cut-off events. For 176623/176626 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17520 event pairs, 659 based on Foata normal form. 4/3278 useless extension candidates. Maximal degree in co-relation 23075. Up to 2881 conditions per place. [2024-06-21 16:42:22,244 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 118 selfloop transitions, 28 changer transitions 0/164 dead transitions. [2024-06-21 16:42:22,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 164 transitions, 1516 flow [2024-06-21 16:42:22,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:22,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:22,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:42:22,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:42:22,246 INFO L175 Difference]: Start difference. First operand has 122 places, 138 transitions, 1114 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:42:22,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 164 transitions, 1516 flow [2024-06-21 16:42:22,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 164 transitions, 1469 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:22,314 INFO L231 Difference]: Finished difference. Result has 126 places, 140 transitions, 1184 flow [2024-06-21 16:42:22,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1184, PETRI_PLACES=126, PETRI_TRANSITIONS=140} [2024-06-21 16:42:22,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-21 16:42:22,315 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 140 transitions, 1184 flow [2024-06-21 16:42:22,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:22,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:22,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:22,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:42:22,316 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:22,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1769946535, now seen corresponding path program 5 times [2024-06-21 16:42:22,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:22,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29955676] [2024-06-21 16:42:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:23,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:23,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:23,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29955676] [2024-06-21 16:42:23,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29955676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:23,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:23,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:23,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678236859] [2024-06-21 16:42:23,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:23,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:23,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:23,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:23,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:23,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:23,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 140 transitions, 1184 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:23,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:23,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:23,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:24,345 INFO L124 PetriNetUnfolderBase]: 2205/3436 cut-off events. [2024-06-21 16:42:24,345 INFO L125 PetriNetUnfolderBase]: For 188907/188910 co-relation queries the response was YES. [2024-06-21 16:42:24,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24443 conditions, 3436 events. 2205/3436 cut-off events. For 188907/188910 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17999 event pairs, 632 based on Foata normal form. 4/3433 useless extension candidates. Maximal degree in co-relation 24387. Up to 2794 conditions per place. [2024-06-21 16:42:24,366 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 96 selfloop transitions, 73 changer transitions 0/176 dead transitions. [2024-06-21 16:42:24,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1798 flow [2024-06-21 16:42:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:42:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 16:42:24,367 INFO L175 Difference]: Start difference. First operand has 126 places, 140 transitions, 1184 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:42:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1798 flow [2024-06-21 16:42:24,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 176 transitions, 1699 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:24,437 INFO L231 Difference]: Finished difference. Result has 129 places, 143 transitions, 1301 flow [2024-06-21 16:42:24,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=129, PETRI_TRANSITIONS=143} [2024-06-21 16:42:24,438 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 84 predicate places. [2024-06-21 16:42:24,438 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 143 transitions, 1301 flow [2024-06-21 16:42:24,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:24,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:24,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:24,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:42:24,439 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)] === [2024-06-21 16:42:24,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1769773555, now seen corresponding path program 6 times [2024-06-21 16:42:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:24,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479053459] [2024-06-21 16:42:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:25,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:25,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479053459] [2024-06-21 16:42:25,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479053459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:25,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:25,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:25,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275131863] [2024-06-21 16:42:25,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:25,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:25,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:25,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:25,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 143 transitions, 1301 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:25,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:25,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:26,417 INFO L124 PetriNetUnfolderBase]: 2259/3534 cut-off events. [2024-06-21 16:42:26,417 INFO L125 PetriNetUnfolderBase]: For 202867/202870 co-relation queries the response was YES. [2024-06-21 16:42:26,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25611 conditions, 3534 events. 2259/3534 cut-off events. For 202867/202870 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 18727 event pairs, 637 based on Foata normal form. 4/3531 useless extension candidates. Maximal degree in co-relation 25554. Up to 2840 conditions per place. [2024-06-21 16:42:26,439 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 102 selfloop transitions, 76 changer transitions 0/185 dead transitions. [2024-06-21 16:42:26,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 185 transitions, 2155 flow [2024-06-21 16:42:26,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 16:42:26,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-21 16:42:26,441 INFO L175 Difference]: Start difference. First operand has 129 places, 143 transitions, 1301 flow. Second operand 9 states and 195 transitions. [2024-06-21 16:42:26,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 185 transitions, 2155 flow [2024-06-21 16:42:26,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 185 transitions, 1905 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:26,509 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1347 flow [2024-06-21 16:42:26,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-21 16:42:26,509 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-21 16:42:26,510 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1347 flow [2024-06-21 16:42:26,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:26,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:26,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:26,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:42:26,510 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)] === [2024-06-21 16:42:26,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:26,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1541865895, now seen corresponding path program 7 times [2024-06-21 16:42:26,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:26,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054775113] [2024-06-21 16:42:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:26,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:27,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:27,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054775113] [2024-06-21 16:42:27,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054775113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:27,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:27,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:27,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041821278] [2024-06-21 16:42:27,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:27,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:27,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:27,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:27,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:27,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:27,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:27,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:27,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:28,608 INFO L124 PetriNetUnfolderBase]: 2313/3627 cut-off events. [2024-06-21 16:42:28,609 INFO L125 PetriNetUnfolderBase]: For 215182/215185 co-relation queries the response was YES. [2024-06-21 16:42:28,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26390 conditions, 3627 events. 2313/3627 cut-off events. For 215182/215185 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19312 event pairs, 639 based on Foata normal form. 4/3624 useless extension candidates. Maximal degree in co-relation 26332. Up to 2886 conditions per place. [2024-06-21 16:42:28,633 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 100 selfloop transitions, 85 changer transitions 0/192 dead transitions. [2024-06-21 16:42:28,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 192 transitions, 2347 flow [2024-06-21 16:42:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:28,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:28,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 16:42:28,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-21 16:42:28,635 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1347 flow. Second operand 9 states and 194 transitions. [2024-06-21 16:42:28,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 192 transitions, 2347 flow [2024-06-21 16:42:28,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 192 transitions, 2175 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:28,719 INFO L231 Difference]: Finished difference. Result has 135 places, 155 transitions, 1469 flow [2024-06-21 16:42:28,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=135, PETRI_TRANSITIONS=155} [2024-06-21 16:42:28,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-21 16:42:28,720 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 155 transitions, 1469 flow [2024-06-21 16:42:28,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:28,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:28,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:42:28,721 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)] === [2024-06-21 16:42:28,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1769767045, now seen corresponding path program 8 times [2024-06-21 16:42:28,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:28,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653783087] [2024-06-21 16:42:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:28,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:28,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:29,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:29,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653783087] [2024-06-21 16:42:29,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653783087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:29,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:29,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:29,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313733418] [2024-06-21 16:42:29,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:29,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:29,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 155 transitions, 1469 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:29,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:29,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:29,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:30,733 INFO L124 PetriNetUnfolderBase]: 2303/3613 cut-off events. [2024-06-21 16:42:30,734 INFO L125 PetriNetUnfolderBase]: For 223167/223170 co-relation queries the response was YES. [2024-06-21 16:42:30,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26378 conditions, 3613 events. 2303/3613 cut-off events. For 223167/223170 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19285 event pairs, 637 based on Foata normal form. 4/3610 useless extension candidates. Maximal degree in co-relation 26319. Up to 2878 conditions per place. [2024-06-21 16:42:30,758 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 98 selfloop transitions, 83 changer transitions 0/188 dead transitions. [2024-06-21 16:42:30,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 188 transitions, 2057 flow [2024-06-21 16:42:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:30,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-21 16:42:30,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-21 16:42:30,760 INFO L175 Difference]: Start difference. First operand has 135 places, 155 transitions, 1469 flow. Second operand 9 states and 191 transitions. [2024-06-21 16:42:30,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 188 transitions, 2057 flow [2024-06-21 16:42:30,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 188 transitions, 1803 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:30,862 INFO L231 Difference]: Finished difference. Result has 138 places, 155 transitions, 1389 flow [2024-06-21 16:42:30,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1389, PETRI_PLACES=138, PETRI_TRANSITIONS=155} [2024-06-21 16:42:30,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 93 predicate places. [2024-06-21 16:42:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 155 transitions, 1389 flow [2024-06-21 16:42:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:30,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:30,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:30,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:42:30,865 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)] === [2024-06-21 16:42:30,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1541872405, now seen corresponding path program 9 times [2024-06-21 16:42:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:30,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97463369] [2024-06-21 16:42:30,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:30,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97463369] [2024-06-21 16:42:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97463369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:31,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:31,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:31,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079523601] [2024-06-21 16:42:31,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:31,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:31,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:31,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:31,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:31,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:31,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 155 transitions, 1389 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:31,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:31,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:31,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:32,866 INFO L124 PetriNetUnfolderBase]: 2293/3599 cut-off events. [2024-06-21 16:42:32,866 INFO L125 PetriNetUnfolderBase]: For 229381/229384 co-relation queries the response was YES. [2024-06-21 16:42:32,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26184 conditions, 3599 events. 2293/3599 cut-off events. For 229381/229384 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 19200 event pairs, 635 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 26124. Up to 2870 conditions per place. [2024-06-21 16:42:32,888 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 95 selfloop transitions, 86 changer transitions 0/188 dead transitions. [2024-06-21 16:42:32,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 1981 flow [2024-06-21 16:42:32,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:32,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 16:42:32,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:32,889 INFO L175 Difference]: Start difference. First operand has 138 places, 155 transitions, 1389 flow. Second operand 9 states and 189 transitions. [2024-06-21 16:42:32,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 1981 flow [2024-06-21 16:42:33,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 188 transitions, 1775 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:33,013 INFO L231 Difference]: Finished difference. Result has 139 places, 155 transitions, 1363 flow [2024-06-21 16:42:33,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1363, PETRI_PLACES=139, PETRI_TRANSITIONS=155} [2024-06-21 16:42:33,013 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 16:42:33,013 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 155 transitions, 1363 flow [2024-06-21 16:42:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:33,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:33,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:33,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:42:33,014 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:33,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:33,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1533591685, now seen corresponding path program 10 times [2024-06-21 16:42:33,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781322124] [2024-06-21 16:42:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781322124] [2024-06-21 16:42:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781322124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996743964] [2024-06-21 16:42:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:34,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:34,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 155 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:34,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:34,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:34,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:34,967 INFO L124 PetriNetUnfolderBase]: 2283/3585 cut-off events. [2024-06-21 16:42:34,967 INFO L125 PetriNetUnfolderBase]: For 236622/236625 co-relation queries the response was YES. [2024-06-21 16:42:34,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26150 conditions, 3585 events. 2283/3585 cut-off events. For 236622/236625 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 19136 event pairs, 640 based on Foata normal form. 4/3582 useless extension candidates. Maximal degree in co-relation 26089. Up to 2862 conditions per place. [2024-06-21 16:42:34,991 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 86 selfloop transitions, 92 changer transitions 0/185 dead transitions. [2024-06-21 16:42:34,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 185 transitions, 1793 flow [2024-06-21 16:42:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:42:34,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 16:42:34,992 INFO L175 Difference]: Start difference. First operand has 139 places, 155 transitions, 1363 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:42:34,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 185 transitions, 1793 flow [2024-06-21 16:42:35,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 185 transitions, 1569 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:35,105 INFO L231 Difference]: Finished difference. Result has 140 places, 155 transitions, 1331 flow [2024-06-21 16:42:35,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1139, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1331, PETRI_PLACES=140, PETRI_TRANSITIONS=155} [2024-06-21 16:42:35,105 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-21 16:42:35,105 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 155 transitions, 1331 flow [2024-06-21 16:42:35,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:35,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:35,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:35,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:42:35,106 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:35,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:35,106 INFO L85 PathProgramCache]: Analyzing trace with hash 753815036, now seen corresponding path program 2 times [2024-06-21 16:42:35,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:35,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462632042] [2024-06-21 16:42:35,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:35,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:35,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:35,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462632042] [2024-06-21 16:42:35,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462632042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:35,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:35,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890682593] [2024-06-21 16:42:35,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:35,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:36,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:36,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 155 transitions, 1331 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:36,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:36,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:36,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:36,484 INFO L124 PetriNetUnfolderBase]: 1948/3203 cut-off events. [2024-06-21 16:42:36,484 INFO L125 PetriNetUnfolderBase]: For 241130/241130 co-relation queries the response was YES. [2024-06-21 16:42:36,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24550 conditions, 3203 events. 1948/3203 cut-off events. For 241130/241130 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18142 event pairs, 644 based on Foata normal form. 1/3174 useless extension candidates. Maximal degree in co-relation 24488. Up to 2783 conditions per place. [2024-06-21 16:42:36,509 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 120 selfloop transitions, 18 changer transitions 0/167 dead transitions. [2024-06-21 16:42:36,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 167 transitions, 1667 flow [2024-06-21 16:42:36,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:36,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:42:36,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:42:36,511 INFO L175 Difference]: Start difference. First operand has 140 places, 155 transitions, 1331 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:42:36,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 167 transitions, 1667 flow [2024-06-21 16:42:36,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 167 transitions, 1459 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:42:36,618 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1209 flow [2024-06-21 16:42:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1209, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-06-21 16:42:36,619 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-21 16:42:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1209 flow [2024-06-21 16:42:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:36,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:42:36,620 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2039531214, now seen corresponding path program 1 times [2024-06-21 16:42:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019014405] [2024-06-21 16:42:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:37,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019014405] [2024-06-21 16:42:37,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019014405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:37,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608839061] [2024-06-21 16:42:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:37,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:37,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1209 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:37,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:37,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:37,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:37,933 INFO L124 PetriNetUnfolderBase]: 1931/3211 cut-off events. [2024-06-21 16:42:37,933 INFO L125 PetriNetUnfolderBase]: For 218008/218008 co-relation queries the response was YES. [2024-06-21 16:42:37,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23110 conditions, 3211 events. 1931/3211 cut-off events. For 218008/218008 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18118 event pairs, 564 based on Foata normal form. 1/3209 useless extension candidates. Maximal degree in co-relation 23047. Up to 2774 conditions per place. [2024-06-21 16:42:37,954 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 143 selfloop transitions, 11 changer transitions 0/173 dead transitions. [2024-06-21 16:42:37,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1585 flow [2024-06-21 16:42:37,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 16:42:37,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:37,955 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1209 flow. Second operand 6 states and 126 transitions. [2024-06-21 16:42:37,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1585 flow [2024-06-21 16:42:38,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 173 transitions, 1521 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:38,044 INFO L231 Difference]: Finished difference. Result has 139 places, 161 transitions, 1217 flow [2024-06-21 16:42:38,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=139, PETRI_TRANSITIONS=161} [2024-06-21 16:42:38,045 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 16:42:38,045 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 161 transitions, 1217 flow [2024-06-21 16:42:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:38,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:38,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:38,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:42:38,045 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:38,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:38,046 INFO L85 PathProgramCache]: Analyzing trace with hash 753820988, now seen corresponding path program 2 times [2024-06-21 16:42:38,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:38,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446563483] [2024-06-21 16:42:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:38,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:38,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:38,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446563483] [2024-06-21 16:42:38,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446563483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:38,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:38,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:38,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881069938] [2024-06-21 16:42:38,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:38,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:38,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:38,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:38,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:38,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 161 transitions, 1217 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:38,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:38,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:38,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:39,468 INFO L124 PetriNetUnfolderBase]: 1928/3208 cut-off events. [2024-06-21 16:42:39,468 INFO L125 PetriNetUnfolderBase]: For 226230/226233 co-relation queries the response was YES. [2024-06-21 16:42:39,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23512 conditions, 3208 events. 1928/3208 cut-off events. For 226230/226233 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18085 event pairs, 568 based on Foata normal form. 3/3207 useless extension candidates. Maximal degree in co-relation 23448. Up to 2764 conditions per place. [2024-06-21 16:42:39,489 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 138 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2024-06-21 16:42:39,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1591 flow [2024-06-21 16:42:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:39,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:42:39,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:42:39,491 INFO L175 Difference]: Start difference. First operand has 139 places, 161 transitions, 1217 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:42:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1591 flow [2024-06-21 16:42:39,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 1541 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:39,576 INFO L231 Difference]: Finished difference. Result has 141 places, 164 transitions, 1255 flow [2024-06-21 16:42:39,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=141, PETRI_TRANSITIONS=164} [2024-06-21 16:42:39,577 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-21 16:42:39,577 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 164 transitions, 1255 flow [2024-06-21 16:42:39,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:39,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:39,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:42:39,578 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)] === [2024-06-21 16:42:39,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1352694705, now seen corresponding path program 1 times [2024-06-21 16:42:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:39,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793576337] [2024-06-21 16:42:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:40,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793576337] [2024-06-21 16:42:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793576337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:40,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:40,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110217776] [2024-06-21 16:42:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:40,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:40,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:40,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:41,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:41,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 164 transitions, 1255 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-21 16:42:41,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:41,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:41,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:41,872 INFO L124 PetriNetUnfolderBase]: 2028/3301 cut-off events. [2024-06-21 16:42:41,872 INFO L125 PetriNetUnfolderBase]: For 235594/235594 co-relation queries the response was YES. [2024-06-21 16:42:41,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24303 conditions, 3301 events. 2028/3301 cut-off events. For 235594/235594 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18099 event pairs, 548 based on Foata normal form. 4/3302 useless extension candidates. Maximal degree in co-relation 24238. Up to 2912 conditions per place. [2024-06-21 16:42:41,895 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 170 selfloop transitions, 19 changer transitions 0/197 dead transitions. [2024-06-21 16:42:41,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 197 transitions, 1773 flow [2024-06-21 16:42:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:42:41,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 16:42:41,900 INFO L175 Difference]: Start difference. First operand has 141 places, 164 transitions, 1255 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:42:41,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 197 transitions, 1773 flow [2024-06-21 16:42:42,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 197 transitions, 1707 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:42,022 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1314 flow [2024-06-21 16:42:42,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-21 16:42:42,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-21 16:42:42,022 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1314 flow [2024-06-21 16:42:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-21 16:42:42,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:42,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:42,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:42:42,023 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)] === [2024-06-21 16:42:42,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:42,023 INFO L85 PathProgramCache]: Analyzing trace with hash 753830908, now seen corresponding path program 1 times [2024-06-21 16:42:42,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:42,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982112881] [2024-06-21 16:42:42,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:42,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:42,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:42,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:42,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:42,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982112881] [2024-06-21 16:42:42,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982112881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:42,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:42,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:42,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282569679] [2024-06-21 16:42:42,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:42,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:42,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:42,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:42,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:43,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:43,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1314 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-21 16:42:43,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:43,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:43,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:43,560 INFO L124 PetriNetUnfolderBase]: 1850/3092 cut-off events. [2024-06-21 16:42:43,560 INFO L125 PetriNetUnfolderBase]: For 241131/241131 co-relation queries the response was YES. [2024-06-21 16:42:43,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24006 conditions, 3092 events. 1850/3092 cut-off events. For 241131/241131 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 17508 event pairs, 568 based on Foata normal form. 1/3069 useless extension candidates. Maximal degree in co-relation 23939. Up to 2698 conditions per place. [2024-06-21 16:42:43,584 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 140 selfloop transitions, 14 changer transitions 0/182 dead transitions. [2024-06-21 16:42:43,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 182 transitions, 1684 flow [2024-06-21 16:42:43,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:42:43,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:42:43,585 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1314 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:42:43,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 182 transitions, 1684 flow [2024-06-21 16:42:43,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 182 transitions, 1599 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:43,738 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1307 flow [2024-06-21 16:42:43,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1307, PETRI_PLACES=148, PETRI_TRANSITIONS=172} [2024-06-21 16:42:43,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-21 16:42:43,739 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1307 flow [2024-06-21 16:42:43,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-21 16:42:43,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:43,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:43,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:42:43,739 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:43,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:43,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1960091435, now seen corresponding path program 1 times [2024-06-21 16:42:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:43,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164050669] [2024-06-21 16:42:43,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:43,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:43,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:44,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:44,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164050669] [2024-06-21 16:42:44,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164050669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:44,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:44,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:44,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447195019] [2024-06-21 16:42:44,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:44,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:44,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:44,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:44,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:44,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:44,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 172 transitions, 1307 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:44,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:44,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:44,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:45,695 INFO L124 PetriNetUnfolderBase]: 2311/3627 cut-off events. [2024-06-21 16:42:45,696 INFO L125 PetriNetUnfolderBase]: For 299539/299539 co-relation queries the response was YES. [2024-06-21 16:42:45,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28765 conditions, 3627 events. 2311/3627 cut-off events. For 299539/299539 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 19256 event pairs, 456 based on Foata normal form. 4/3628 useless extension candidates. Maximal degree in co-relation 28697. Up to 3200 conditions per place. [2024-06-21 16:42:45,721 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 25 changer transitions 0/218 dead transitions. [2024-06-21 16:42:45,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 218 transitions, 2103 flow [2024-06-21 16:42:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:42:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:42:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 16:42:45,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-21 16:42:45,722 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1307 flow. Second operand 10 states and 203 transitions. [2024-06-21 16:42:45,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 218 transitions, 2103 flow [2024-06-21 16:42:45,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 218 transitions, 2047 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:45,830 INFO L231 Difference]: Finished difference. Result has 153 places, 176 transitions, 1412 flow [2024-06-21 16:42:45,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1412, PETRI_PLACES=153, PETRI_TRANSITIONS=176} [2024-06-21 16:42:45,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 108 predicate places. [2024-06-21 16:42:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 176 transitions, 1412 flow [2024-06-21 16:42:45,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:45,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:45,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:42:45,831 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:45,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1871525675, now seen corresponding path program 2 times [2024-06-21 16:42:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065390083] [2024-06-21 16:42:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:46,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:46,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065390083] [2024-06-21 16:42:46,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065390083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:46,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:46,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473620542] [2024-06-21 16:42:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:46,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:46,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 176 transitions, 1412 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:46,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:46,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:46,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:47,763 INFO L124 PetriNetUnfolderBase]: 2328/3654 cut-off events. [2024-06-21 16:42:47,763 INFO L125 PetriNetUnfolderBase]: For 313415/313415 co-relation queries the response was YES. [2024-06-21 16:42:47,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29420 conditions, 3654 events. 2328/3654 cut-off events. For 313415/313415 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19376 event pairs, 618 based on Foata normal form. 4/3655 useless extension candidates. Maximal degree in co-relation 29351. Up to 3290 conditions per place. [2024-06-21 16:42:47,789 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 22 changer transitions 0/215 dead transitions. [2024-06-21 16:42:47,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 215 transitions, 2148 flow [2024-06-21 16:42:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:42:47,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 16:42:47,791 INFO L175 Difference]: Start difference. First operand has 153 places, 176 transitions, 1412 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:42:47,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 215 transitions, 2148 flow [2024-06-21 16:42:47,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 215 transitions, 2047 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:47,963 INFO L231 Difference]: Finished difference. Result has 156 places, 178 transitions, 1416 flow [2024-06-21 16:42:47,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=156, PETRI_TRANSITIONS=178} [2024-06-21 16:42:47,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 16:42:47,964 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 178 transitions, 1416 flow [2024-06-21 16:42:47,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:47,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:47,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:47,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:42:47,964 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:47,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:47,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1018104341, now seen corresponding path program 3 times [2024-06-21 16:42:47,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:47,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304010928] [2024-06-21 16:42:47,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:47,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:49,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:49,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304010928] [2024-06-21 16:42:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304010928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:49,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:49,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:49,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38522004] [2024-06-21 16:42:49,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:49,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:49,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:49,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:49,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:49,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:49,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 178 transitions, 1416 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:49,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:49,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:49,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:49,978 INFO L124 PetriNetUnfolderBase]: 2320/3642 cut-off events. [2024-06-21 16:42:49,978 INFO L125 PetriNetUnfolderBase]: For 322192/322192 co-relation queries the response was YES. [2024-06-21 16:42:49,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29315 conditions, 3642 events. 2320/3642 cut-off events. For 322192/322192 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19348 event pairs, 621 based on Foata normal form. 4/3643 useless extension candidates. Maximal degree in co-relation 29244. Up to 3325 conditions per place. [2024-06-21 16:42:50,007 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 19 changer transitions 0/212 dead transitions. [2024-06-21 16:42:50,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 212 transitions, 1912 flow [2024-06-21 16:42:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:50,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:42:50,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:42:50,008 INFO L175 Difference]: Start difference. First operand has 156 places, 178 transitions, 1416 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:42:50,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 212 transitions, 1912 flow [2024-06-21 16:42:50,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 212 transitions, 1809 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:50,204 INFO L231 Difference]: Finished difference. Result has 158 places, 178 transitions, 1358 flow [2024-06-21 16:42:50,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=158, PETRI_TRANSITIONS=178} [2024-06-21 16:42:50,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-21 16:42:50,204 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 178 transitions, 1358 flow [2024-06-21 16:42:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:50,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:50,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:50,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:42:50,205 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:50,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1733682987, now seen corresponding path program 4 times [2024-06-21 16:42:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523440485] [2024-06-21 16:42:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:51,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523440485] [2024-06-21 16:42:51,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523440485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:51,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:51,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:51,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795761641] [2024-06-21 16:42:51,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:51,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:51,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:51,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:51,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:51,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:51,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:51,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:52,259 INFO L124 PetriNetUnfolderBase]: 2337/3670 cut-off events. [2024-06-21 16:42:52,259 INFO L125 PetriNetUnfolderBase]: For 335006/335009 co-relation queries the response was YES. [2024-06-21 16:42:52,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29624 conditions, 3670 events. 2337/3670 cut-off events. For 335006/335009 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19504 event pairs, 629 based on Foata normal form. 4/3670 useless extension candidates. Maximal degree in co-relation 29552. Up to 3226 conditions per place. [2024-06-21 16:42:52,289 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 152 selfloop transitions, 52 changer transitions 0/211 dead transitions. [2024-06-21 16:42:52,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 211 transitions, 1898 flow [2024-06-21 16:42:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:42:52,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 16:42:52,290 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 1358 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:42:52,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 211 transitions, 1898 flow [2024-06-21 16:42:52,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 1855 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:52,464 INFO L231 Difference]: Finished difference. Result has 159 places, 180 transitions, 1484 flow [2024-06-21 16:42:52,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1484, PETRI_PLACES=159, PETRI_TRANSITIONS=180} [2024-06-21 16:42:52,465 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-21 16:42:52,465 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 180 transitions, 1484 flow [2024-06-21 16:42:52,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:52,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:52,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:52,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:42:52,465 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:52,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:52,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1739045367, now seen corresponding path program 5 times [2024-06-21 16:42:52,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:52,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381264018] [2024-06-21 16:42:52,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:52,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:53,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:53,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:53,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381264018] [2024-06-21 16:42:53,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381264018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:53,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:53,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:53,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492990926] [2024-06-21 16:42:53,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:53,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:53,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:53,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:53,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 180 transitions, 1484 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:53,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:53,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:53,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:54,478 INFO L124 PetriNetUnfolderBase]: 2354/3697 cut-off events. [2024-06-21 16:42:54,479 INFO L125 PetriNetUnfolderBase]: For 349709/349712 co-relation queries the response was YES. [2024-06-21 16:42:54,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30369 conditions, 3697 events. 2354/3697 cut-off events. For 349709/349712 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19682 event pairs, 634 based on Foata normal form. 4/3697 useless extension candidates. Maximal degree in co-relation 30296. Up to 3253 conditions per place. [2024-06-21 16:42:54,504 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 155 selfloop transitions, 51 changer transitions 0/213 dead transitions. [2024-06-21 16:42:54,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2032 flow [2024-06-21 16:42:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 16:42:54,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 16:42:54,505 INFO L175 Difference]: Start difference. First operand has 159 places, 180 transitions, 1484 flow. Second operand 9 states and 185 transitions. [2024-06-21 16:42:54,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2032 flow [2024-06-21 16:42:54,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 213 transitions, 1881 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:54,695 INFO L231 Difference]: Finished difference. Result has 161 places, 182 transitions, 1504 flow [2024-06-21 16:42:54,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1333, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1504, PETRI_PLACES=161, PETRI_TRANSITIONS=182} [2024-06-21 16:42:54,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-21 16:42:54,696 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 182 transitions, 1504 flow [2024-06-21 16:42:54,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:54,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:54,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:54,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:42:54,696 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:54,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:54,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2116983597, now seen corresponding path program 6 times [2024-06-21 16:42:54,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:54,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828841007] [2024-06-21 16:42:54,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:54,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:55,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828841007] [2024-06-21 16:42:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828841007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:55,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:55,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:55,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618060943] [2024-06-21 16:42:55,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:55,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:55,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:55,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:55,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 182 transitions, 1504 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:55,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:55,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:55,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:56,728 INFO L124 PetriNetUnfolderBase]: 2371/3724 cut-off events. [2024-06-21 16:42:56,728 INFO L125 PetriNetUnfolderBase]: For 363995/363998 co-relation queries the response was YES. [2024-06-21 16:42:56,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30887 conditions, 3724 events. 2371/3724 cut-off events. For 363995/363998 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 19831 event pairs, 629 based on Foata normal form. 4/3724 useless extension candidates. Maximal degree in co-relation 30813. Up to 3221 conditions per place. [2024-06-21 16:42:56,757 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 153 selfloop transitions, 56 changer transitions 0/216 dead transitions. [2024-06-21 16:42:56,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 216 transitions, 2064 flow [2024-06-21 16:42:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-21 16:42:56,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 16:42:56,758 INFO L175 Difference]: Start difference. First operand has 161 places, 182 transitions, 1504 flow. Second operand 9 states and 186 transitions. [2024-06-21 16:42:56,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 216 transitions, 2064 flow [2024-06-21 16:42:56,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 216 transitions, 1911 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:56,947 INFO L231 Difference]: Finished difference. Result has 163 places, 184 transitions, 1536 flow [2024-06-21 16:42:56,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1536, PETRI_PLACES=163, PETRI_TRANSITIONS=184} [2024-06-21 16:42:56,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-21 16:42:56,948 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 184 transitions, 1536 flow [2024-06-21 16:42:56,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:56,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:56,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:56,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:42:56,949 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:56,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1480124396, now seen corresponding path program 1 times [2024-06-21 16:42:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:56,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211317570] [2024-06-21 16:42:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:56,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:57,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:57,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211317570] [2024-06-21 16:42:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211317570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:57,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:57,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381162961] [2024-06-21 16:42:57,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:57,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:57,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:57,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:57,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:57,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 184 transitions, 1536 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:57,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:57,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:57,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:58,516 INFO L124 PetriNetUnfolderBase]: 2146/3469 cut-off events. [2024-06-21 16:42:58,516 INFO L125 PetriNetUnfolderBase]: For 370621/370625 co-relation queries the response was YES. [2024-06-21 16:42:58,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29799 conditions, 3469 events. 2146/3469 cut-off events. For 370621/370625 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19234 event pairs, 652 based on Foata normal form. 2/3447 useless extension candidates. Maximal degree in co-relation 29724. Up to 3095 conditions per place. [2024-06-21 16:42:58,547 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 154 selfloop transitions, 16 changer transitions 0/203 dead transitions. [2024-06-21 16:42:58,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 203 transitions, 1958 flow [2024-06-21 16:42:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:58,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:58,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:42:58,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:42:58,548 INFO L175 Difference]: Start difference. First operand has 163 places, 184 transitions, 1536 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:42:58,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 203 transitions, 1958 flow [2024-06-21 16:42:58,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 203 transitions, 1791 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:58,696 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 1455 flow [2024-06-21 16:42:58,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1455, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-21 16:42:58,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-21 16:42:58,697 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 1455 flow [2024-06-21 16:42:58,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:58,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:58,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:58,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:42:58,697 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)] === [2024-06-21 16:42:58,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash 966227465, now seen corresponding path program 7 times [2024-06-21 16:42:58,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:58,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769838050] [2024-06-21 16:42:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:58,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:58,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:59,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:59,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769838050] [2024-06-21 16:42:59,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769838050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:59,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:59,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:59,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047045498] [2024-06-21 16:42:59,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:59,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:59,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:59,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:59,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:59,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:59,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 1455 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:42:59,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:59,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:59,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:00,759 INFO L124 PetriNetUnfolderBase]: 2414/3779 cut-off events. [2024-06-21 16:43:00,759 INFO L125 PetriNetUnfolderBase]: For 391318/391321 co-relation queries the response was YES. [2024-06-21 16:43:00,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31989 conditions, 3779 events. 2414/3779 cut-off events. For 391318/391321 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 20161 event pairs, 646 based on Foata normal form. 4/3776 useless extension candidates. Maximal degree in co-relation 31913. Up to 3333 conditions per place. [2024-06-21 16:43:00,789 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 157 selfloop transitions, 52 changer transitions 0/217 dead transitions. [2024-06-21 16:43:00,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 217 transitions, 2009 flow [2024-06-21 16:43:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 16:43:00,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 16:43:00,791 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 1455 flow. Second operand 9 states and 181 transitions. [2024-06-21 16:43:00,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 217 transitions, 2009 flow [2024-06-21 16:43:00,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 217 transitions, 1945 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:00,995 INFO L231 Difference]: Finished difference. Result has 167 places, 189 transitions, 1572 flow [2024-06-21 16:43:00,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1572, PETRI_PLACES=167, PETRI_TRANSITIONS=189} [2024-06-21 16:43:00,996 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 122 predicate places. [2024-06-21 16:43:00,996 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 189 transitions, 1572 flow [2024-06-21 16:43:00,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:00,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:00,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:00,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:43:00,996 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:00,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 966079595, now seen corresponding path program 8 times [2024-06-21 16:43:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:00,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178142798] [2024-06-21 16:43:00,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:00,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:01,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:01,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:01,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178142798] [2024-06-21 16:43:01,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178142798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:01,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:01,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559667402] [2024-06-21 16:43:01,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:01,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:01,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:02,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 189 transitions, 1572 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:02,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:02,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:02,952 INFO L124 PetriNetUnfolderBase]: 2431/3806 cut-off events. [2024-06-21 16:43:02,952 INFO L125 PetriNetUnfolderBase]: For 407933/407936 co-relation queries the response was YES. [2024-06-21 16:43:02,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32758 conditions, 3806 events. 2431/3806 cut-off events. For 407933/407936 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 20357 event pairs, 641 based on Foata normal form. 4/3803 useless extension candidates. Maximal degree in co-relation 32681. Up to 3290 conditions per place. [2024-06-21 16:43:02,982 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 159 selfloop transitions, 57 changer transitions 0/224 dead transitions. [2024-06-21 16:43:02,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 224 transitions, 2420 flow [2024-06-21 16:43:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:02,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-21 16:43:02,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-21 16:43:02,983 INFO L175 Difference]: Start difference. First operand has 167 places, 189 transitions, 1572 flow. Second operand 9 states and 184 transitions. [2024-06-21 16:43:02,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 224 transitions, 2420 flow [2024-06-21 16:43:03,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 224 transitions, 2257 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:03,179 INFO L231 Difference]: Finished difference. Result has 169 places, 193 transitions, 1674 flow [2024-06-21 16:43:03,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1674, PETRI_PLACES=169, PETRI_TRANSITIONS=193} [2024-06-21 16:43:03,179 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-21 16:43:03,179 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 193 transitions, 1674 flow [2024-06-21 16:43:03,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:03,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:03,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:03,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:43:03,180 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:03,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash 971589845, now seen corresponding path program 9 times [2024-06-21 16:43:03,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:03,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473300179] [2024-06-21 16:43:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:04,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:04,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473300179] [2024-06-21 16:43:04,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473300179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:04,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:04,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25846402] [2024-06-21 16:43:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:04,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:04,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:04,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:04,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:04,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 193 transitions, 1674 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:04,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:04,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:04,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:05,215 INFO L124 PetriNetUnfolderBase]: 2448/3833 cut-off events. [2024-06-21 16:43:05,215 INFO L125 PetriNetUnfolderBase]: For 424135/424138 co-relation queries the response was YES. [2024-06-21 16:43:05,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33304 conditions, 3833 events. 2448/3833 cut-off events. For 424135/424138 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20493 event pairs, 646 based on Foata normal form. 4/3830 useless extension candidates. Maximal degree in co-relation 33226. Up to 3387 conditions per place. [2024-06-21 16:43:05,247 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 164 selfloop transitions, 51 changer transitions 0/223 dead transitions. [2024-06-21 16:43:05,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 2248 flow [2024-06-21 16:43:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:43:05,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 16:43:05,248 INFO L175 Difference]: Start difference. First operand has 169 places, 193 transitions, 1674 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:43:05,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 2248 flow [2024-06-21 16:43:05,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 223 transitions, 2080 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:05,478 INFO L231 Difference]: Finished difference. Result has 173 places, 195 transitions, 1693 flow [2024-06-21 16:43:05,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1693, PETRI_PLACES=173, PETRI_TRANSITIONS=195} [2024-06-21 16:43:05,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-21 16:43:05,478 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 195 transitions, 1693 flow [2024-06-21 16:43:05,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:05,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:05,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:05,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:43:05,479 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:05,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:05,479 INFO L85 PathProgramCache]: Analyzing trace with hash -553409097, now seen corresponding path program 10 times [2024-06-21 16:43:05,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:05,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381355188] [2024-06-21 16:43:05,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:05,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:06,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:06,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381355188] [2024-06-21 16:43:06,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381355188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:06,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:06,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234486725] [2024-06-21 16:43:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:06,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:06,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:06,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 195 transitions, 1693 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:06,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:06,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:06,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:07,536 INFO L124 PetriNetUnfolderBase]: 2440/3821 cut-off events. [2024-06-21 16:43:07,536 INFO L125 PetriNetUnfolderBase]: For 430287/430290 co-relation queries the response was YES. [2024-06-21 16:43:07,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33123 conditions, 3821 events. 2440/3821 cut-off events. For 430287/430290 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 20450 event pairs, 644 based on Foata normal form. 4/3818 useless extension candidates. Maximal degree in co-relation 33043. Up to 3375 conditions per place. [2024-06-21 16:43:07,567 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 161 selfloop transitions, 54 changer transitions 0/223 dead transitions. [2024-06-21 16:43:07,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 223 transitions, 2193 flow [2024-06-21 16:43:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 16:43:07,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:43:07,568 INFO L175 Difference]: Start difference. First operand has 173 places, 195 transitions, 1693 flow. Second operand 9 states and 180 transitions. [2024-06-21 16:43:07,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 223 transitions, 2193 flow [2024-06-21 16:43:07,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 223 transitions, 2012 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:07,807 INFO L231 Difference]: Finished difference. Result has 175 places, 195 transitions, 1627 flow [2024-06-21 16:43:07,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1512, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1627, PETRI_PLACES=175, PETRI_TRANSITIONS=195} [2024-06-21 16:43:07,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-21 16:43:07,807 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 195 transitions, 1627 flow [2024-06-21 16:43:07,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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) [2024-06-21 16:43:07,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:07,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:07,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:43:07,808 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)] === [2024-06-21 16:43:07,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash 741563566, now seen corresponding path program 2 times [2024-06-21 16:43:07,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:07,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372814302] [2024-06-21 16:43:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:07,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:08,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:08,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372814302] [2024-06-21 16:43:08,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372814302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:08,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:08,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:08,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326384973] [2024-06-21 16:43:08,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:08,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:08,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:08,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:08,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:08,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 195 transitions, 1627 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:09,369 INFO L124 PetriNetUnfolderBase]: 2184/3527 cut-off events. [2024-06-21 16:43:09,370 INFO L125 PetriNetUnfolderBase]: For 432034/432052 co-relation queries the response was YES. [2024-06-21 16:43:09,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31368 conditions, 3527 events. 2184/3527 cut-off events. For 432034/432052 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19720 event pairs, 662 based on Foata normal form. 5/3501 useless extension candidates. Maximal degree in co-relation 31287. Up to 3129 conditions per place. [2024-06-21 16:43:09,400 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 147 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-21 16:43:09,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 212 transitions, 2213 flow [2024-06-21 16:43:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:43:09,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:43:09,401 INFO L175 Difference]: Start difference. First operand has 175 places, 195 transitions, 1627 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:43:09,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 212 transitions, 2213 flow [2024-06-21 16:43:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 212 transitions, 2086 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:09,685 INFO L231 Difference]: Finished difference. Result has 174 places, 201 transitions, 1664 flow [2024-06-21 16:43:09,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1664, PETRI_PLACES=174, PETRI_TRANSITIONS=201} [2024-06-21 16:43:09,686 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-21 16:43:09,686 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 201 transitions, 1664 flow [2024-06-21 16:43:09,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:09,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:09,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:43:09,687 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)] === [2024-06-21 16:43:09,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 173778862, now seen corresponding path program 3 times [2024-06-21 16:43:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541737425] [2024-06-21 16:43:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:09,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:10,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:10,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541737425] [2024-06-21 16:43:10,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541737425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:10,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:10,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759629725] [2024-06-21 16:43:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:10,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:10,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:10,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:10,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 201 transitions, 1664 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:10,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:10,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:10,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:11,270 INFO L124 PetriNetUnfolderBase]: 2181/3523 cut-off events. [2024-06-21 16:43:11,271 INFO L125 PetriNetUnfolderBase]: For 446261/446269 co-relation queries the response was YES. [2024-06-21 16:43:11,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31700 conditions, 3523 events. 2181/3523 cut-off events. For 446261/446269 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19703 event pairs, 662 based on Foata normal form. 9/3502 useless extension candidates. Maximal degree in co-relation 31618. Up to 3126 conditions per place. [2024-06-21 16:43:11,302 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 145 selfloop transitions, 29 changer transitions 0/211 dead transitions. [2024-06-21 16:43:11,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 211 transitions, 2036 flow [2024-06-21 16:43:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:11,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:43:11,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-21 16:43:11,303 INFO L175 Difference]: Start difference. First operand has 174 places, 201 transitions, 1664 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:43:11,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 211 transitions, 2036 flow [2024-06-21 16:43:11,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 211 transitions, 1933 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-21 16:43:11,610 INFO L231 Difference]: Finished difference. Result has 178 places, 201 transitions, 1625 flow [2024-06-21 16:43:11,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1561, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1625, PETRI_PLACES=178, PETRI_TRANSITIONS=201} [2024-06-21 16:43:11,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-21 16:43:11,611 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 201 transitions, 1625 flow [2024-06-21 16:43:11,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:11,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:11,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:11,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:43:11,612 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)] === [2024-06-21 16:43:11,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:11,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1199219904, now seen corresponding path program 1 times [2024-06-21 16:43:11,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:11,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434861516] [2024-06-21 16:43:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:11,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:12,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:12,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:12,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434861516] [2024-06-21 16:43:12,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434861516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:12,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258092541] [2024-06-21 16:43:12,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:12,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:12,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:12,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:12,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:12,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:12,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 201 transitions, 1625 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:12,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:12,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:12,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:13,248 INFO L124 PetriNetUnfolderBase]: 2206/3572 cut-off events. [2024-06-21 16:43:13,248 INFO L125 PetriNetUnfolderBase]: For 401023/401023 co-relation queries the response was YES. [2024-06-21 16:43:13,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 3572 events. 2206/3572 cut-off events. For 401023/401023 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19743 event pairs, 540 based on Foata normal form. 1/3570 useless extension candidates. Maximal degree in co-relation 30164. Up to 3212 conditions per place. [2024-06-21 16:43:13,279 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-21 16:43:13,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 220 transitions, 2139 flow [2024-06-21 16:43:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:13,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:43:13,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:43:13,280 INFO L175 Difference]: Start difference. First operand has 178 places, 201 transitions, 1625 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:43:13,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 220 transitions, 2139 flow [2024-06-21 16:43:13,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 220 transitions, 2073 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:13,551 INFO L231 Difference]: Finished difference. Result has 179 places, 204 transitions, 1655 flow [2024-06-21 16:43:13,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1655, PETRI_PLACES=179, PETRI_TRANSITIONS=204} [2024-06-21 16:43:13,552 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-21 16:43:13,552 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 204 transitions, 1655 flow [2024-06-21 16:43:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:13,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:13,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:43:13,553 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:13,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1657440428, now seen corresponding path program 1 times [2024-06-21 16:43:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:13,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107032139] [2024-06-21 16:43:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107032139] [2024-06-21 16:43:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107032139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:14,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:14,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819367035] [2024-06-21 16:43:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:14,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:14,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 204 transitions, 1655 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:14,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:14,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:14,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:15,110 INFO L124 PetriNetUnfolderBase]: 2207/3575 cut-off events. [2024-06-21 16:43:15,110 INFO L125 PetriNetUnfolderBase]: For 409730/409730 co-relation queries the response was YES. [2024-06-21 16:43:15,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30392 conditions, 3575 events. 2207/3575 cut-off events. For 409730/409730 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19806 event pairs, 582 based on Foata normal form. 1/3573 useless extension candidates. Maximal degree in co-relation 30307. Up to 3167 conditions per place. [2024-06-21 16:43:15,143 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 178 selfloop transitions, 14 changer transitions 0/220 dead transitions. [2024-06-21 16:43:15,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 220 transitions, 2123 flow [2024-06-21 16:43:15,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:43:15,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-21 16:43:15,144 INFO L175 Difference]: Start difference. First operand has 179 places, 204 transitions, 1655 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:43:15,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 220 transitions, 2123 flow [2024-06-21 16:43:15,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 220 transitions, 2049 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:15,391 INFO L231 Difference]: Finished difference. Result has 181 places, 207 transitions, 1673 flow [2024-06-21 16:43:15,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1673, PETRI_PLACES=181, PETRI_TRANSITIONS=207} [2024-06-21 16:43:15,392 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-21 16:43:15,392 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 207 transitions, 1673 flow [2024-06-21 16:43:15,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:15,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:15,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:15,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:43:15,392 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:15,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1199040414, now seen corresponding path program 2 times [2024-06-21 16:43:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272599026] [2024-06-21 16:43:15,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:16,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272599026] [2024-06-21 16:43:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272599026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:16,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:16,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:16,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495429236] [2024-06-21 16:43:16,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:16,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:16,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:16,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:16,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:16,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:16,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 207 transitions, 1673 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:16,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:16,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:16,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:16,947 INFO L124 PetriNetUnfolderBase]: 2226/3596 cut-off events. [2024-06-21 16:43:16,947 INFO L125 PetriNetUnfolderBase]: For 427016/427016 co-relation queries the response was YES. [2024-06-21 16:43:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31410 conditions, 3596 events. 2226/3596 cut-off events. For 427016/427016 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19843 event pairs, 539 based on Foata normal form. 1/3594 useless extension candidates. Maximal degree in co-relation 31324. Up to 3228 conditions per place. [2024-06-21 16:43:16,979 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 192 selfloop transitions, 19 changer transitions 0/223 dead transitions. [2024-06-21 16:43:16,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 223 transitions, 2191 flow [2024-06-21 16:43:16,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:43:16,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:43:16,980 INFO L175 Difference]: Start difference. First operand has 181 places, 207 transitions, 1673 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:43:16,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 223 transitions, 2191 flow [2024-06-21 16:43:17,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 223 transitions, 2121 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:17,268 INFO L231 Difference]: Finished difference. Result has 183 places, 210 transitions, 1717 flow [2024-06-21 16:43:17,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1603, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1717, PETRI_PLACES=183, PETRI_TRANSITIONS=210} [2024-06-21 16:43:17,268 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 138 predicate places. [2024-06-21 16:43:17,269 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 210 transitions, 1717 flow [2024-06-21 16:43:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:17,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:17,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:17,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:43:17,269 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:17,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:17,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1893615788, now seen corresponding path program 2 times [2024-06-21 16:43:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:17,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480414418] [2024-06-21 16:43:17,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:17,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:17,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:18,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:18,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480414418] [2024-06-21 16:43:18,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480414418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:18,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:18,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:18,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028406397] [2024-06-21 16:43:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:18,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:18,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:18,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:18,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 210 transitions, 1717 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:18,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:18,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:18,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:18,782 INFO L124 PetriNetUnfolderBase]: 2217/3590 cut-off events. [2024-06-21 16:43:18,783 INFO L125 PetriNetUnfolderBase]: For 435546/435549 co-relation queries the response was YES. [2024-06-21 16:43:18,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31432 conditions, 3590 events. 2217/3590 cut-off events. For 435546/435549 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19868 event pairs, 586 based on Foata normal form. 3/3589 useless extension candidates. Maximal degree in co-relation 31345. Up to 3163 conditions per place. [2024-06-21 16:43:18,814 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 172 selfloop transitions, 26 changer transitions 0/227 dead transitions. [2024-06-21 16:43:18,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 227 transitions, 2383 flow [2024-06-21 16:43:18,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:43:18,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:43:18,815 INFO L175 Difference]: Start difference. First operand has 183 places, 210 transitions, 1717 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:43:18,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 227 transitions, 2383 flow [2024-06-21 16:43:19,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 227 transitions, 2291 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:19,030 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 1809 flow [2024-06-21 16:43:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1625, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1809, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-21 16:43:19,030 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-21 16:43:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 1809 flow [2024-06-21 16:43:19,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:19,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:19,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:19,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:43:19,031 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)] === [2024-06-21 16:43:19,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1192553664, now seen corresponding path program 3 times [2024-06-21 16:43:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:19,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151943588] [2024-06-21 16:43:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:19,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:19,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151943588] [2024-06-21 16:43:19,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151943588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:19,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:19,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:19,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367698431] [2024-06-21 16:43:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:19,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:19,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:19,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:19,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:20,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 1809 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:20,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:20,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:20,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:20,561 INFO L124 PetriNetUnfolderBase]: 2228/3600 cut-off events. [2024-06-21 16:43:20,561 INFO L125 PetriNetUnfolderBase]: For 453295/453298 co-relation queries the response was YES. [2024-06-21 16:43:20,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32314 conditions, 3600 events. 2228/3600 cut-off events. For 453295/453298 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19837 event pairs, 547 based on Foata normal form. 1/3597 useless extension candidates. Maximal degree in co-relation 32226. Up to 3220 conditions per place. [2024-06-21 16:43:20,592 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 26 changer transitions 0/229 dead transitions. [2024-06-21 16:43:20,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 229 transitions, 2335 flow [2024-06-21 16:43:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:20,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:20,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:43:20,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:43:20,593 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 1809 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:43:20,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 229 transitions, 2335 flow [2024-06-21 16:43:20,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 229 transitions, 2253 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:43:20,954 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 1863 flow [2024-06-21 16:43:20,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1863, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-06-21 16:43:20,955 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-21 16:43:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 1863 flow [2024-06-21 16:43:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:20,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:20,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:43:20,956 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:20,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1893912458, now seen corresponding path program 3 times [2024-06-21 16:43:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:20,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133495182] [2024-06-21 16:43:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:21,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:21,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133495182] [2024-06-21 16:43:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133495182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:21,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:21,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445564487] [2024-06-21 16:43:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:21,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:21,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:22,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:22,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 1863 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:22,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:22,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:22,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:22,541 INFO L124 PetriNetUnfolderBase]: 2216/3587 cut-off events. [2024-06-21 16:43:22,542 INFO L125 PetriNetUnfolderBase]: For 457468/457471 co-relation queries the response was YES. [2024-06-21 16:43:22,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32214 conditions, 3587 events. 2216/3587 cut-off events. For 457468/457471 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19859 event pairs, 586 based on Foata normal form. 3/3586 useless extension candidates. Maximal degree in co-relation 32124. Up to 3157 conditions per place. [2024-06-21 16:43:22,575 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 172 selfloop transitions, 27 changer transitions 0/229 dead transitions. [2024-06-21 16:43:22,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 229 transitions, 2285 flow [2024-06-21 16:43:22,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:22,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:43:22,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-21 16:43:22,576 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 1863 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:43:22,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 229 transitions, 2285 flow [2024-06-21 16:43:22,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 229 transitions, 2129 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:22,938 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 1767 flow [2024-06-21 16:43:22,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1767, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-21 16:43:22,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-21 16:43:22,939 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 1767 flow [2024-06-21 16:43:22,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:22,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:22,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:22,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:43:22,939 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)] === [2024-06-21 16:43:22,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:22,940 INFO L85 PathProgramCache]: Analyzing trace with hash 48382390, now seen corresponding path program 1 times [2024-06-21 16:43:22,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:22,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057144868] [2024-06-21 16:43:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:22,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:24,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:24,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057144868] [2024-06-21 16:43:24,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057144868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:24,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:24,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:24,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505159437] [2024-06-21 16:43:24,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:24,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:24,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:24,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:24,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:24,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:24,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 1767 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:24,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:24,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:25,197 INFO L124 PetriNetUnfolderBase]: 2646/4164 cut-off events. [2024-06-21 16:43:25,198 INFO L125 PetriNetUnfolderBase]: For 633714/633714 co-relation queries the response was YES. [2024-06-21 16:43:25,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39964 conditions, 4164 events. 2646/4164 cut-off events. For 633714/633714 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 22961 event pairs, 528 based on Foata normal form. 16/4177 useless extension candidates. Maximal degree in co-relation 39873. Up to 3409 conditions per place. [2024-06-21 16:43:25,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 29 changer transitions 0/276 dead transitions. [2024-06-21 16:43:25,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 276 transitions, 2801 flow [2024-06-21 16:43:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:43:25,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:43:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-21 16:43:25,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-21 16:43:25,234 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 1767 flow. Second operand 11 states and 229 transitions. [2024-06-21 16:43:25,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 276 transitions, 2801 flow [2024-06-21 16:43:25,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 276 transitions, 2739 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:25,627 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 1875 flow [2024-06-21 16:43:25,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1705, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1875, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-21 16:43:25,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-21 16:43:25,628 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 1875 flow [2024-06-21 16:43:25,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:25,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:25,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:25,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:43:25,629 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)] === [2024-06-21 16:43:25,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:25,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1501046346, now seen corresponding path program 2 times [2024-06-21 16:43:25,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:25,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558788739] [2024-06-21 16:43:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:25,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:26,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558788739] [2024-06-21 16:43:26,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558788739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:26,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:26,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751906732] [2024-06-21 16:43:26,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:26,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:27,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 1875 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:27,945 INFO L124 PetriNetUnfolderBase]: 2704/4268 cut-off events. [2024-06-21 16:43:27,945 INFO L125 PetriNetUnfolderBase]: For 653203/653203 co-relation queries the response was YES. [2024-06-21 16:43:27,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41089 conditions, 4268 events. 2704/4268 cut-off events. For 653203/653203 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 23753 event pairs, 698 based on Foata normal form. 16/4281 useless extension candidates. Maximal degree in co-relation 40997. Up to 3593 conditions per place. [2024-06-21 16:43:27,985 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 234 selfloop transitions, 25 changer transitions 0/272 dead transitions. [2024-06-21 16:43:27,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 272 transitions, 2843 flow [2024-06-21 16:43:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 16:43:27,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:43:27,986 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 1875 flow. Second operand 10 states and 210 transitions. [2024-06-21 16:43:27,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 272 transitions, 2843 flow [2024-06-21 16:43:28,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 272 transitions, 2761 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:28,489 INFO L231 Difference]: Finished difference. Result has 199 places, 222 transitions, 1903 flow [2024-06-21 16:43:28,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1903, PETRI_PLACES=199, PETRI_TRANSITIONS=222} [2024-06-21 16:43:28,489 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 154 predicate places. [2024-06-21 16:43:28,490 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 222 transitions, 1903 flow [2024-06-21 16:43:28,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:28,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:28,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:28,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:43:28,490 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)] === [2024-06-21 16:43:28,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:28,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1496462376, now seen corresponding path program 3 times [2024-06-21 16:43:28,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327488436] [2024-06-21 16:43:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:28,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327488436] [2024-06-21 16:43:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327488436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062407466] [2024-06-21 16:43:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:29,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:29,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:29,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:29,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 222 transitions, 1903 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:29,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:29,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:29,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:30,751 INFO L124 PetriNetUnfolderBase]: 2762/4366 cut-off events. [2024-06-21 16:43:30,752 INFO L125 PetriNetUnfolderBase]: For 675552/675552 co-relation queries the response was YES. [2024-06-21 16:43:30,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41672 conditions, 4366 events. 2762/4366 cut-off events. For 675552/675552 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 24433 event pairs, 709 based on Foata normal form. 16/4379 useless extension candidates. Maximal degree in co-relation 41578. Up to 3742 conditions per place. [2024-06-21 16:43:30,792 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 236 selfloop transitions, 23 changer transitions 0/272 dead transitions. [2024-06-21 16:43:30,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 272 transitions, 2869 flow [2024-06-21 16:43:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:43:30,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-21 16:43:30,794 INFO L175 Difference]: Start difference. First operand has 199 places, 222 transitions, 1903 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:43:30,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 272 transitions, 2869 flow [2024-06-21 16:43:31,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 272 transitions, 2779 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:31,338 INFO L231 Difference]: Finished difference. Result has 201 places, 223 transitions, 1915 flow [2024-06-21 16:43:31,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1815, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1915, PETRI_PLACES=201, PETRI_TRANSITIONS=223} [2024-06-21 16:43:31,339 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-21 16:43:31,339 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 223 transitions, 1915 flow [2024-06-21 16:43:31,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:31,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:31,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:31,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:43:31,340 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)] === [2024-06-21 16:43:31,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1865769076, now seen corresponding path program 4 times [2024-06-21 16:43:31,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:31,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630049566] [2024-06-21 16:43:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:31,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:32,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:32,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:32,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630049566] [2024-06-21 16:43:32,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630049566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:32,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:32,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:32,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483761009] [2024-06-21 16:43:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:32,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:32,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 223 transitions, 1915 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:32,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:32,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:32,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:33,586 INFO L124 PetriNetUnfolderBase]: 2726/4310 cut-off events. [2024-06-21 16:43:33,586 INFO L125 PetriNetUnfolderBase]: For 660852/660852 co-relation queries the response was YES. [2024-06-21 16:43:33,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40036 conditions, 4310 events. 2726/4310 cut-off events. For 660852/660852 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24051 event pairs, 711 based on Foata normal form. 20/4327 useless extension candidates. Maximal degree in co-relation 39941. Up to 3842 conditions per place. [2024-06-21 16:43:33,624 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 232 selfloop transitions, 21 changer transitions 0/266 dead transitions. [2024-06-21 16:43:33,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 266 transitions, 2561 flow [2024-06-21 16:43:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:33,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 16:43:33,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-21 16:43:33,625 INFO L175 Difference]: Start difference. First operand has 201 places, 223 transitions, 1915 flow. Second operand 10 states and 202 transitions. [2024-06-21 16:43:33,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 266 transitions, 2561 flow [2024-06-21 16:43:34,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2454 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:34,009 INFO L231 Difference]: Finished difference. Result has 203 places, 223 transitions, 1857 flow [2024-06-21 16:43:34,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1857, PETRI_PLACES=203, PETRI_TRANSITIONS=223} [2024-06-21 16:43:34,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 158 predicate places. [2024-06-21 16:43:34,009 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 223 transitions, 1857 flow [2024-06-21 16:43:34,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:34,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:34,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:34,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:43:34,010 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:34,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2090408024, now seen corresponding path program 5 times [2024-06-21 16:43:34,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:34,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609431209] [2024-06-21 16:43:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:34,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:35,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:35,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609431209] [2024-06-21 16:43:35,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609431209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:35,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897619077] [2024-06-21 16:43:35,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:35,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:35,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:35,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:35,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 223 transitions, 1857 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:35,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:35,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:35,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:36,550 INFO L124 PetriNetUnfolderBase]: 2801/4444 cut-off events. [2024-06-21 16:43:36,550 INFO L125 PetriNetUnfolderBase]: For 676404/676407 co-relation queries the response was YES. [2024-06-21 16:43:36,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40726 conditions, 4444 events. 2801/4444 cut-off events. For 676404/676407 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 25116 event pairs, 681 based on Foata normal form. 20/4460 useless extension candidates. Maximal degree in co-relation 40630. Up to 3564 conditions per place. [2024-06-21 16:43:36,590 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 168 selfloop transitions, 86 changer transitions 0/267 dead transitions. [2024-06-21 16:43:36,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 267 transitions, 2563 flow [2024-06-21 16:43:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:36,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 16:43:36,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 16:43:36,591 INFO L175 Difference]: Start difference. First operand has 203 places, 223 transitions, 1857 flow. Second operand 10 states and 214 transitions. [2024-06-21 16:43:36,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 267 transitions, 2563 flow [2024-06-21 16:43:37,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 267 transitions, 2516 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 16:43:37,044 INFO L231 Difference]: Finished difference. Result has 204 places, 224 transitions, 2045 flow [2024-06-21 16:43:37,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2045, PETRI_PLACES=204, PETRI_TRANSITIONS=224} [2024-06-21 16:43:37,044 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-21 16:43:37,044 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 224 transitions, 2045 flow [2024-06-21 16:43:37,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:37,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:37,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:37,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:43:37,045 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)] === [2024-06-21 16:43:37,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1655488920, now seen corresponding path program 6 times [2024-06-21 16:43:37,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:37,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354837209] [2024-06-21 16:43:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:37,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:38,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:38,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354837209] [2024-06-21 16:43:38,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354837209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:38,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:38,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:38,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442673846] [2024-06-21 16:43:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:38,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:38,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:38,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:38,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:38,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 224 transitions, 2045 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:38,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:38,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:38,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:39,533 INFO L124 PetriNetUnfolderBase]: 2970/4733 cut-off events. [2024-06-21 16:43:39,533 INFO L125 PetriNetUnfolderBase]: For 741139/741142 co-relation queries the response was YES. [2024-06-21 16:43:39,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44687 conditions, 4733 events. 2970/4733 cut-off events. For 741139/741142 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27362 event pairs, 709 based on Foata normal form. 16/4745 useless extension candidates. Maximal degree in co-relation 44590. Up to 3567 conditions per place. [2024-06-21 16:43:39,578 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 89 changer transitions 0/274 dead transitions. [2024-06-21 16:43:39,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 274 transitions, 3089 flow [2024-06-21 16:43:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:39,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:39,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 16:43:39,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-21 16:43:39,579 INFO L175 Difference]: Start difference. First operand has 204 places, 224 transitions, 2045 flow. Second operand 10 states and 218 transitions. [2024-06-21 16:43:39,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 274 transitions, 3089 flow [2024-06-21 16:43:40,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 274 transitions, 2886 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:40,176 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2140 flow [2024-06-21 16:43:40,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2140, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-21 16:43:40,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-21 16:43:40,177 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2140 flow [2024-06-21 16:43:40,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:40,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:40,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:43:40,178 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:40,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:40,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1693873832, now seen corresponding path program 7 times [2024-06-21 16:43:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114441362] [2024-06-21 16:43:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:40,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:41,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:41,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114441362] [2024-06-21 16:43:41,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114441362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:41,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:41,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:41,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605724556] [2024-06-21 16:43:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:41,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:41,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:41,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:41,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2140 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:41,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:41,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:41,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:42,633 INFO L124 PetriNetUnfolderBase]: 2934/4672 cut-off events. [2024-06-21 16:43:42,633 INFO L125 PetriNetUnfolderBase]: For 723844/723847 co-relation queries the response was YES. [2024-06-21 16:43:42,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43027 conditions, 4672 events. 2934/4672 cut-off events. For 723844/723847 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26953 event pairs, 706 based on Foata normal form. 20/4688 useless extension candidates. Maximal degree in co-relation 42929. Up to 3787 conditions per place. [2024-06-21 16:43:42,677 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 167 selfloop transitions, 88 changer transitions 0/268 dead transitions. [2024-06-21 16:43:42,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 268 transitions, 2790 flow [2024-06-21 16:43:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:42,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:42,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 16:43:42,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-21 16:43:42,678 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2140 flow. Second operand 10 states and 212 transitions. [2024-06-21 16:43:42,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 268 transitions, 2790 flow [2024-06-21 16:43:43,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 268 transitions, 2615 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:43,301 INFO L231 Difference]: Finished difference. Result has 210 places, 226 transitions, 2148 flow [2024-06-21 16:43:43,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2148, PETRI_PLACES=210, PETRI_TRANSITIONS=226} [2024-06-21 16:43:43,302 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-21 16:43:43,302 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 226 transitions, 2148 flow [2024-06-21 16:43:43,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:43,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:43,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:43,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:43:43,302 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:43,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:43,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1242673616, now seen corresponding path program 8 times [2024-06-21 16:43:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:43,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300780073] [2024-06-21 16:43:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:43,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:44,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:44,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300780073] [2024-06-21 16:43:44,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300780073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:44,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:44,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:44,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005221308] [2024-06-21 16:43:44,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:44,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:44,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:44,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:44,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:44,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:44,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 226 transitions, 2148 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:44,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:44,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:44,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:45,983 INFO L124 PetriNetUnfolderBase]: 3009/4812 cut-off events. [2024-06-21 16:43:45,983 INFO L125 PetriNetUnfolderBase]: For 739636/739639 co-relation queries the response was YES. [2024-06-21 16:43:46,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43985 conditions, 4812 events. 3009/4812 cut-off events. For 739636/739639 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28098 event pairs, 735 based on Foata normal form. 20/4828 useless extension candidates. Maximal degree in co-relation 43885. Up to 3912 conditions per place. [2024-06-21 16:43:46,028 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 85 changer transitions 0/270 dead transitions. [2024-06-21 16:43:46,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 270 transitions, 2864 flow [2024-06-21 16:43:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:46,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-21 16:43:46,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 16:43:46,030 INFO L175 Difference]: Start difference. First operand has 210 places, 226 transitions, 2148 flow. Second operand 10 states and 215 transitions. [2024-06-21 16:43:46,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 270 transitions, 2864 flow [2024-06-21 16:43:46,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 270 transitions, 2678 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:43:46,634 INFO L231 Difference]: Finished difference. Result has 211 places, 227 transitions, 2199 flow [2024-06-21 16:43:46,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2199, PETRI_PLACES=211, PETRI_TRANSITIONS=227} [2024-06-21 16:43:46,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-21 16:43:46,635 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 227 transitions, 2199 flow [2024-06-21 16:43:46,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:46,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:46,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:46,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:43:46,636 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)] === [2024-06-21 16:43:46,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:46,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1197396974, now seen corresponding path program 9 times [2024-06-21 16:43:46,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:46,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914642174] [2024-06-21 16:43:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:47,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:47,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914642174] [2024-06-21 16:43:47,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914642174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:47,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:47,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:47,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493970088] [2024-06-21 16:43:47,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:47,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:47,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:47,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:47,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:47,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:47,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 227 transitions, 2199 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:47,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:47,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:47,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:49,065 INFO L124 PetriNetUnfolderBase]: 3067/4915 cut-off events. [2024-06-21 16:43:49,065 INFO L125 PetriNetUnfolderBase]: For 757299/757302 co-relation queries the response was YES. [2024-06-21 16:43:49,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44956 conditions, 4915 events. 3067/4915 cut-off events. For 757299/757302 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28859 event pairs, 730 based on Foata normal form. 16/4927 useless extension candidates. Maximal degree in co-relation 44855. Up to 3900 conditions per place. [2024-06-21 16:43:49,114 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 175 selfloop transitions, 87 changer transitions 0/275 dead transitions. [2024-06-21 16:43:49,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 275 transitions, 2945 flow [2024-06-21 16:43:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-21 16:43:49,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49772727272727274 [2024-06-21 16:43:49,116 INFO L175 Difference]: Start difference. First operand has 211 places, 227 transitions, 2199 flow. Second operand 10 states and 219 transitions. [2024-06-21 16:43:49,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 275 transitions, 2945 flow [2024-06-21 16:43:49,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 275 transitions, 2740 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:49,777 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 2236 flow [2024-06-21 16:43:49,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2236, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-06-21 16:43:49,778 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-21 16:43:49,778 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 2236 flow [2024-06-21 16:43:49,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:49,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:49,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:49,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:43:49,778 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1919585624, now seen corresponding path program 10 times [2024-06-21 16:43:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:49,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675241692] [2024-06-21 16:43:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:49,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:50,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:50,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675241692] [2024-06-21 16:43:50,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675241692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:50,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:50,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:50,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607330878] [2024-06-21 16:43:50,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:50,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:50,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:50,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:50,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:50,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:50,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 2236 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:50,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:50,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:50,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:52,104 INFO L124 PetriNetUnfolderBase]: 3125/5013 cut-off events. [2024-06-21 16:43:52,104 INFO L125 PetriNetUnfolderBase]: For 777836/777839 co-relation queries the response was YES. [2024-06-21 16:43:52,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45669 conditions, 5013 events. 3125/5013 cut-off events. For 777836/777839 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29623 event pairs, 731 based on Foata normal form. 16/5025 useless extension candidates. Maximal degree in co-relation 45567. Up to 3515 conditions per place. [2024-06-21 16:43:52,155 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 94 changer transitions 0/276 dead transitions. [2024-06-21 16:43:52,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 276 transitions, 2984 flow [2024-06-21 16:43:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:43:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:43:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-21 16:43:52,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-21 16:43:52,156 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 2236 flow. Second operand 10 states and 218 transitions. [2024-06-21 16:43:52,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 276 transitions, 2984 flow [2024-06-21 16:43:52,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 276 transitions, 2762 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:52,769 INFO L231 Difference]: Finished difference. Result has 215 places, 229 transitions, 2272 flow [2024-06-21 16:43:52,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2272, PETRI_PLACES=215, PETRI_TRANSITIONS=229} [2024-06-21 16:43:52,769 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-21 16:43:52,769 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 229 transitions, 2272 flow [2024-06-21 16:43:52,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:52,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:52,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:43:52,770 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1133321847, now seen corresponding path program 1 times [2024-06-21 16:43:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227098094] [2024-06-21 16:43:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:53,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:53,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227098094] [2024-06-21 16:43:53,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227098094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:53,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:53,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:53,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755814482] [2024-06-21 16:43:53,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:53,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:53,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:53,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:53,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:53,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 229 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:53,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:53,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:53,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:54,454 INFO L124 PetriNetUnfolderBase]: 2942/4802 cut-off events. [2024-06-21 16:43:54,454 INFO L125 PetriNetUnfolderBase]: For 754740/754743 co-relation queries the response was YES. [2024-06-21 16:43:54,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44329 conditions, 4802 events. 2942/4802 cut-off events. For 754740/754743 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29123 event pairs, 810 based on Foata normal form. 3/4765 useless extension candidates. Maximal degree in co-relation 44226. Up to 4293 conditions per place. [2024-06-21 16:43:54,500 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 195 selfloop transitions, 19 changer transitions 0/251 dead transitions. [2024-06-21 16:43:54,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 251 transitions, 2798 flow [2024-06-21 16:43:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:43:54,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-21 16:43:54,501 INFO L175 Difference]: Start difference. First operand has 215 places, 229 transitions, 2272 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:43:54,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 251 transitions, 2798 flow [2024-06-21 16:43:55,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 251 transitions, 2560 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:55,118 INFO L231 Difference]: Finished difference. Result has 214 places, 232 transitions, 2134 flow [2024-06-21 16:43:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=214, PETRI_TRANSITIONS=232} [2024-06-21 16:43:55,118 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-21 16:43:55,118 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 2134 flow [2024-06-21 16:43:55,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:55,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:55,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:43:55,119 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:55,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:55,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1140940407, now seen corresponding path program 2 times [2024-06-21 16:43:55,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:55,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113728661] [2024-06-21 16:43:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:55,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:55,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:55,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:55,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113728661] [2024-06-21 16:43:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113728661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:55,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:55,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:55,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440156296] [2024-06-21 16:43:55,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:55,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:56,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:56,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:56,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:56,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:56,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:56,919 INFO L124 PetriNetUnfolderBase]: 2955/4820 cut-off events. [2024-06-21 16:43:56,919 INFO L125 PetriNetUnfolderBase]: For 767504/767507 co-relation queries the response was YES. [2024-06-21 16:43:56,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44290 conditions, 4820 events. 2955/4820 cut-off events. For 767504/767507 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 29209 event pairs, 810 based on Foata normal form. 3/4783 useless extension candidates. Maximal degree in co-relation 44186. Up to 4301 conditions per place. [2024-06-21 16:43:56,971 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 194 selfloop transitions, 26 changer transitions 0/257 dead transitions. [2024-06-21 16:43:56,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 2891 flow [2024-06-21 16:43:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 16:43:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-21 16:43:56,972 INFO L175 Difference]: Start difference. First operand has 214 places, 232 transitions, 2134 flow. Second operand 7 states and 144 transitions. [2024-06-21 16:43:56,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 2891 flow [2024-06-21 16:43:57,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 257 transitions, 2813 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:57,683 INFO L231 Difference]: Finished difference. Result has 217 places, 240 transitions, 2258 flow [2024-06-21 16:43:57,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2258, PETRI_PLACES=217, PETRI_TRANSITIONS=240} [2024-06-21 16:43:57,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-21 16:43:57,683 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 240 transitions, 2258 flow [2024-06-21 16:43:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:57,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:57,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:57,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:43:57,684 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:57,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2097083378, now seen corresponding path program 1 times [2024-06-21 16:43:57,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:57,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651540024] [2024-06-21 16:43:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:57,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:58,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:58,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651540024] [2024-06-21 16:43:58,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651540024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:58,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:58,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:43:58,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439654684] [2024-06-21 16:43:58,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:58,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:43:58,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:58,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:43:58,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:43:59,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:59,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 240 transitions, 2258 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:43:59,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:59,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:59,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:00,438 INFO L124 PetriNetUnfolderBase]: 3163/5068 cut-off events. [2024-06-21 16:44:00,438 INFO L125 PetriNetUnfolderBase]: For 803244/803247 co-relation queries the response was YES. [2024-06-21 16:44:00,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46536 conditions, 5068 events. 3163/5068 cut-off events. For 803244/803247 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29963 event pairs, 796 based on Foata normal form. 4/5068 useless extension candidates. Maximal degree in co-relation 46430. Up to 4561 conditions per place. [2024-06-21 16:44:00,482 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 223 selfloop transitions, 45 changer transitions 0/281 dead transitions. [2024-06-21 16:44:00,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 281 transitions, 2980 flow [2024-06-21 16:44:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:00,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 16:44:00,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-21 16:44:00,483 INFO L175 Difference]: Start difference. First operand has 217 places, 240 transitions, 2258 flow. Second operand 10 states and 203 transitions. [2024-06-21 16:44:00,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 281 transitions, 2980 flow [2024-06-21 16:44:01,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 281 transitions, 2898 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:44:01,073 INFO L231 Difference]: Finished difference. Result has 225 places, 245 transitions, 2377 flow [2024-06-21 16:44:01,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2377, PETRI_PLACES=225, PETRI_TRANSITIONS=245} [2024-06-21 16:44:01,073 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-21 16:44:01,073 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 245 transitions, 2377 flow [2024-06-21 16:44:01,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:01,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:01,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:01,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:44:01,074 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:01,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:01,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1360782309, now seen corresponding path program 1 times [2024-06-21 16:44:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:01,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689593131] [2024-06-21 16:44:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:01,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689593131] [2024-06-21 16:44:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689593131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:02,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:02,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:02,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145054078] [2024-06-21 16:44:02,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:02,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:02,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:02,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:02,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:02,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:02,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 245 transitions, 2377 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:44:02,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:02,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:02,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:03,171 INFO L124 PetriNetUnfolderBase]: 2903/4763 cut-off events. [2024-06-21 16:44:03,171 INFO L125 PetriNetUnfolderBase]: For 807619/807625 co-relation queries the response was YES. [2024-06-21 16:44:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45399 conditions, 4763 events. 2903/4763 cut-off events. For 807619/807625 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29018 event pairs, 793 based on Foata normal form. 2/4702 useless extension candidates. Maximal degree in co-relation 45290. Up to 4211 conditions per place. [2024-06-21 16:44:03,216 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 21 changer transitions 0/265 dead transitions. [2024-06-21 16:44:03,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 265 transitions, 2907 flow [2024-06-21 16:44:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:44:03,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:44:03,217 INFO L175 Difference]: Start difference. First operand has 225 places, 245 transitions, 2377 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:44:03,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 265 transitions, 2907 flow [2024-06-21 16:44:03,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 265 transitions, 2748 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:03,866 INFO L231 Difference]: Finished difference. Result has 226 places, 248 transitions, 2320 flow [2024-06-21 16:44:03,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2320, PETRI_PLACES=226, PETRI_TRANSITIONS=248} [2024-06-21 16:44:03,867 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-21 16:44:03,867 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 248 transitions, 2320 flow [2024-06-21 16:44:03,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:44:03,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:03,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:03,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:44:03,867 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:03,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash -111540904, now seen corresponding path program 11 times [2024-06-21 16:44:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:03,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97794985] [2024-06-21 16:44:03,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:03,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:04,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:04,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97794985] [2024-06-21 16:44:04,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97794985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:04,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:04,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:04,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306186987] [2024-06-21 16:44:04,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:04,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:04,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:04,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:05,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:05,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 248 transitions, 2320 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:05,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:05,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:05,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:06,544 INFO L124 PetriNetUnfolderBase]: 3244/5216 cut-off events. [2024-06-21 16:44:06,544 INFO L125 PetriNetUnfolderBase]: For 886815/886818 co-relation queries the response was YES. [2024-06-21 16:44:06,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48914 conditions, 5216 events. 3244/5216 cut-off events. For 886815/886818 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31072 event pairs, 761 based on Foata normal form. 20/5229 useless extension candidates. Maximal degree in co-relation 48804. Up to 4298 conditions per place. [2024-06-21 16:44:06,599 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 187 selfloop transitions, 89 changer transitions 0/289 dead transitions. [2024-06-21 16:44:06,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 289 transitions, 3086 flow [2024-06-21 16:44:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:06,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:44:06,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 16:44:06,600 INFO L175 Difference]: Start difference. First operand has 226 places, 248 transitions, 2320 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:44:06,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 289 transitions, 3086 flow [2024-06-21 16:44:07,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 289 transitions, 3006 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:07,362 INFO L231 Difference]: Finished difference. Result has 230 places, 249 transitions, 2493 flow [2024-06-21 16:44:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2493, PETRI_PLACES=230, PETRI_TRANSITIONS=249} [2024-06-21 16:44:07,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-21 16:44:07,362 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 249 transitions, 2493 flow [2024-06-21 16:44:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:07,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:07,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:44:07,362 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:07,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1507913808, now seen corresponding path program 12 times [2024-06-21 16:44:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:07,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598427916] [2024-06-21 16:44:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598427916] [2024-06-21 16:44:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598427916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441546176] [2024-06-21 16:44:08,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:08,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:08,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:08,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 249 transitions, 2493 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:08,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:08,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:09,867 INFO L124 PetriNetUnfolderBase]: 3302/5314 cut-off events. [2024-06-21 16:44:09,867 INFO L125 PetriNetUnfolderBase]: For 907944/907947 co-relation queries the response was YES. [2024-06-21 16:44:09,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50341 conditions, 5314 events. 3302/5314 cut-off events. For 907944/907947 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31777 event pairs, 747 based on Foata normal form. 16/5323 useless extension candidates. Maximal degree in co-relation 50230. Up to 4286 conditions per place. [2024-06-21 16:44:09,922 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 190 selfloop transitions, 91 changer transitions 0/294 dead transitions. [2024-06-21 16:44:09,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 294 transitions, 3291 flow [2024-06-21 16:44:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 16:44:09,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 16:44:09,923 INFO L175 Difference]: Start difference. First operand has 230 places, 249 transitions, 2493 flow. Second operand 10 states and 213 transitions. [2024-06-21 16:44:09,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 294 transitions, 3291 flow [2024-06-21 16:44:10,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 294 transitions, 3070 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:10,663 INFO L231 Difference]: Finished difference. Result has 232 places, 250 transitions, 2530 flow [2024-06-21 16:44:10,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2530, PETRI_PLACES=232, PETRI_TRANSITIONS=250} [2024-06-21 16:44:10,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-21 16:44:10,664 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 250 transitions, 2530 flow [2024-06-21 16:44:10,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:10,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:10,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:44:10,665 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:10,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash 693510308, now seen corresponding path program 13 times [2024-06-21 16:44:10,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:10,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194073133] [2024-06-21 16:44:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:11,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:11,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194073133] [2024-06-21 16:44:11,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194073133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:11,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:11,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613703214] [2024-06-21 16:44:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:11,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:11,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 250 transitions, 2530 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:11,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:11,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:11,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:13,319 INFO L124 PetriNetUnfolderBase]: 3377/5444 cut-off events. [2024-06-21 16:44:13,319 INFO L125 PetriNetUnfolderBase]: For 943683/943686 co-relation queries the response was YES. [2024-06-21 16:44:13,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51368 conditions, 5444 events. 3377/5444 cut-off events. For 943683/943686 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32935 event pairs, 782 based on Foata normal form. 20/5457 useless extension candidates. Maximal degree in co-relation 51256. Up to 4521 conditions per place. [2024-06-21 16:44:13,376 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 90 changer transitions 0/291 dead transitions. [2024-06-21 16:44:13,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 291 transitions, 3304 flow [2024-06-21 16:44:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:44:13,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-21 16:44:13,378 INFO L175 Difference]: Start difference. First operand has 232 places, 250 transitions, 2530 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:44:13,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 291 transitions, 3304 flow [2024-06-21 16:44:14,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 291 transitions, 3066 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:14,415 INFO L231 Difference]: Finished difference. Result has 234 places, 251 transitions, 2551 flow [2024-06-21 16:44:14,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2551, PETRI_PLACES=234, PETRI_TRANSITIONS=251} [2024-06-21 16:44:14,415 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-21 16:44:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 251 transitions, 2551 flow [2024-06-21 16:44:14,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:14,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:14,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:44:14,416 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 61347636, now seen corresponding path program 14 times [2024-06-21 16:44:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:14,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363129271] [2024-06-21 16:44:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:15,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363129271] [2024-06-21 16:44:15,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363129271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:15,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:15,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:15,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616936345] [2024-06-21 16:44:15,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:15,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:15,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:15,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:15,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:15,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 251 transitions, 2551 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:15,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:15,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:17,093 INFO L124 PetriNetUnfolderBase]: 3452/5579 cut-off events. [2024-06-21 16:44:17,093 INFO L125 PetriNetUnfolderBase]: For 970908/970911 co-relation queries the response was YES. [2024-06-21 16:44:17,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52365 conditions, 5579 events. 3452/5579 cut-off events. For 970908/970911 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 34015 event pairs, 811 based on Foata normal form. 20/5592 useless extension candidates. Maximal degree in co-relation 52252. Up to 4646 conditions per place. [2024-06-21 16:44:17,145 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 182 selfloop transitions, 96 changer transitions 0/291 dead transitions. [2024-06-21 16:44:17,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 291 transitions, 3321 flow [2024-06-21 16:44:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:44:17,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:44:17,147 INFO L175 Difference]: Start difference. First operand has 234 places, 251 transitions, 2551 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:44:17,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 291 transitions, 3321 flow [2024-06-21 16:44:18,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 291 transitions, 3094 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:18,071 INFO L231 Difference]: Finished difference. Result has 236 places, 252 transitions, 2597 flow [2024-06-21 16:44:18,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2324, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2597, PETRI_PLACES=236, PETRI_TRANSITIONS=252} [2024-06-21 16:44:18,071 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-21 16:44:18,071 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 252 transitions, 2597 flow [2024-06-21 16:44:18,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:18,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:18,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:18,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:44:18,072 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)] === [2024-06-21 16:44:18,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash -2109963850, now seen corresponding path program 15 times [2024-06-21 16:44:18,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:18,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713454057] [2024-06-21 16:44:18,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:18,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:19,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:19,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713454057] [2024-06-21 16:44:19,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713454057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:19,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:19,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:19,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020930781] [2024-06-21 16:44:19,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:19,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:19,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 252 transitions, 2597 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:19,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:19,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:19,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:20,727 INFO L124 PetriNetUnfolderBase]: 3571/5775 cut-off events. [2024-06-21 16:44:20,727 INFO L125 PetriNetUnfolderBase]: For 1023953/1023956 co-relation queries the response was YES. [2024-06-21 16:44:20,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54980 conditions, 5775 events. 3571/5775 cut-off events. For 1023953/1023956 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35485 event pairs, 806 based on Foata normal form. 16/5784 useless extension candidates. Maximal degree in co-relation 54866. Up to 4112 conditions per place. [2024-06-21 16:44:20,786 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 188 selfloop transitions, 99 changer transitions 0/300 dead transitions. [2024-06-21 16:44:20,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 300 transitions, 3781 flow [2024-06-21 16:44:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 16:44:20,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 16:44:20,787 INFO L175 Difference]: Start difference. First operand has 236 places, 252 transitions, 2597 flow. Second operand 10 states and 214 transitions. [2024-06-21 16:44:20,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 300 transitions, 3781 flow [2024-06-21 16:44:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3540 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:21,704 INFO L231 Difference]: Finished difference. Result has 238 places, 254 transitions, 2710 flow [2024-06-21 16:44:21,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2356, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2710, PETRI_PLACES=238, PETRI_TRANSITIONS=254} [2024-06-21 16:44:21,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 193 predicate places. [2024-06-21 16:44:21,705 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 254 transitions, 2710 flow [2024-06-21 16:44:21,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:21,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:21,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:21,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:44:21,706 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)] === [2024-06-21 16:44:21,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1141548212, now seen corresponding path program 16 times [2024-06-21 16:44:21,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:21,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567764378] [2024-06-21 16:44:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:21,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567764378] [2024-06-21 16:44:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567764378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:22,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735867590] [2024-06-21 16:44:22,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:22,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:22,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 254 transitions, 2710 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:22,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:22,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:22,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:24,391 INFO L124 PetriNetUnfolderBase]: 3646/5900 cut-off events. [2024-06-21 16:44:24,391 INFO L125 PetriNetUnfolderBase]: For 1062958/1062961 co-relation queries the response was YES. [2024-06-21 16:44:24,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56084 conditions, 5900 events. 3646/5900 cut-off events. For 1062958/1062961 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36504 event pairs, 846 based on Foata normal form. 20/5913 useless extension candidates. Maximal degree in co-relation 55969. Up to 4972 conditions per place. [2024-06-21 16:44:24,453 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 197 selfloop transitions, 86 changer transitions 0/296 dead transitions. [2024-06-21 16:44:24,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3506 flow [2024-06-21 16:44:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-21 16:44:24,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-21 16:44:24,454 INFO L175 Difference]: Start difference. First operand has 238 places, 254 transitions, 2710 flow. Second operand 10 states and 212 transitions. [2024-06-21 16:44:24,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3506 flow [2024-06-21 16:44:25,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 296 transitions, 3315 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:25,402 INFO L231 Difference]: Finished difference. Result has 242 places, 255 transitions, 2776 flow [2024-06-21 16:44:25,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2776, PETRI_PLACES=242, PETRI_TRANSITIONS=255} [2024-06-21 16:44:25,403 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-21 16:44:25,403 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 255 transitions, 2776 flow [2024-06-21 16:44:25,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:25,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:25,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:25,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:44:25,404 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:25,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:25,404 INFO L85 PathProgramCache]: Analyzing trace with hash 699766418, now seen corresponding path program 17 times [2024-06-21 16:44:25,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:25,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116725805] [2024-06-21 16:44:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:25,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:26,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:26,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116725805] [2024-06-21 16:44:26,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116725805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:26,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:26,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:26,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336552983] [2024-06-21 16:44:26,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:26,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:26,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:26,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:26,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:26,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:26,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 255 transitions, 2776 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:26,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:26,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:26,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:28,104 INFO L124 PetriNetUnfolderBase]: 3721/6035 cut-off events. [2024-06-21 16:44:28,104 INFO L125 PetriNetUnfolderBase]: For 1080021/1080024 co-relation queries the response was YES. [2024-06-21 16:44:28,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57016 conditions, 6035 events. 3721/6035 cut-off events. For 1080021/1080024 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37687 event pairs, 870 based on Foata normal form. 20/6048 useless extension candidates. Maximal degree in co-relation 56899. Up to 5097 conditions per place. [2024-06-21 16:44:28,169 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 194 selfloop transitions, 89 changer transitions 0/296 dead transitions. [2024-06-21 16:44:28,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 296 transitions, 3556 flow [2024-06-21 16:44:28,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:28,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 16:44:28,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 16:44:28,170 INFO L175 Difference]: Start difference. First operand has 242 places, 255 transitions, 2776 flow. Second operand 10 states and 209 transitions. [2024-06-21 16:44:28,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 296 transitions, 3556 flow [2024-06-21 16:44:29,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 296 transitions, 3345 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:29,234 INFO L231 Difference]: Finished difference. Result has 244 places, 256 transitions, 2818 flow [2024-06-21 16:44:29,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2565, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2818, PETRI_PLACES=244, PETRI_TRANSITIONS=256} [2024-06-21 16:44:29,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 199 predicate places. [2024-06-21 16:44:29,235 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 256 transitions, 2818 flow [2024-06-21 16:44:29,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:29,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:29,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:29,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:44:29,235 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:29,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:29,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1771669660, now seen corresponding path program 18 times [2024-06-21 16:44:29,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:29,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071060530] [2024-06-21 16:44:29,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:29,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:30,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:30,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071060530] [2024-06-21 16:44:30,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071060530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:30,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:30,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:30,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760955131] [2024-06-21 16:44:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:30,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:30,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:30,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:30,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 256 transitions, 2818 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:30,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:30,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:30,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:31,971 INFO L124 PetriNetUnfolderBase]: 3779/6148 cut-off events. [2024-06-21 16:44:31,971 INFO L125 PetriNetUnfolderBase]: For 1093182/1093185 co-relation queries the response was YES. [2024-06-21 16:44:32,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57763 conditions, 6148 events. 3779/6148 cut-off events. For 1093182/1093185 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38659 event pairs, 870 based on Foata normal form. 16/6157 useless extension candidates. Maximal degree in co-relation 57645. Up to 4845 conditions per place. [2024-06-21 16:44:32,036 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 193 selfloop transitions, 94 changer transitions 0/300 dead transitions. [2024-06-21 16:44:32,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 300 transitions, 3622 flow [2024-06-21 16:44:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:32,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 16:44:32,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:44:32,037 INFO L175 Difference]: Start difference. First operand has 244 places, 256 transitions, 2818 flow. Second operand 10 states and 210 transitions. [2024-06-21 16:44:32,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 300 transitions, 3622 flow [2024-06-21 16:44:33,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 300 transitions, 3403 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:33,146 INFO L231 Difference]: Finished difference. Result has 246 places, 257 transitions, 2863 flow [2024-06-21 16:44:33,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2863, PETRI_PLACES=246, PETRI_TRANSITIONS=257} [2024-06-21 16:44:33,146 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 16:44:33,146 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 257 transitions, 2863 flow [2024-06-21 16:44:33,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:33,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:33,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:33,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:44:33,147 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:33,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:33,147 INFO L85 PathProgramCache]: Analyzing trace with hash 54515246, now seen corresponding path program 19 times [2024-06-21 16:44:33,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:33,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907200608] [2024-06-21 16:44:33,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:33,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:34,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:34,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907200608] [2024-06-21 16:44:34,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907200608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:34,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:34,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:34,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842216100] [2024-06-21 16:44:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:34,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:34,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 257 transitions, 2863 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:34,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:34,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:34,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:35,889 INFO L124 PetriNetUnfolderBase]: 3837/6241 cut-off events. [2024-06-21 16:44:35,889 INFO L125 PetriNetUnfolderBase]: For 1118384/1118387 co-relation queries the response was YES. [2024-06-21 16:44:35,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58542 conditions, 6241 events. 3837/6241 cut-off events. For 1118384/1118387 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 39346 event pairs, 876 based on Foata normal form. 16/6250 useless extension candidates. Maximal degree in co-relation 58423. Up to 5017 conditions per place. [2024-06-21 16:44:35,958 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 202 selfloop transitions, 89 changer transitions 0/304 dead transitions. [2024-06-21 16:44:35,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 304 transitions, 3997 flow [2024-06-21 16:44:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-21 16:44:35,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-21 16:44:35,959 INFO L175 Difference]: Start difference. First operand has 246 places, 257 transitions, 2863 flow. Second operand 10 states and 216 transitions. [2024-06-21 16:44:35,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 304 transitions, 3997 flow [2024-06-21 16:44:37,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 304 transitions, 3755 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:37,267 INFO L231 Difference]: Finished difference. Result has 248 places, 258 transitions, 2875 flow [2024-06-21 16:44:37,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2621, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2875, PETRI_PLACES=248, PETRI_TRANSITIONS=258} [2024-06-21 16:44:37,267 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-21 16:44:37,267 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 258 transitions, 2875 flow [2024-06-21 16:44:37,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:37,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:37,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:37,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:44:37,267 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:37,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash 60948986, now seen corresponding path program 20 times [2024-06-21 16:44:37,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999340314] [2024-06-21 16:44:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:37,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999340314] [2024-06-21 16:44:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999340314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:38,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:38,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649336154] [2024-06-21 16:44:38,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:38,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:38,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:38,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 258 transitions, 2875 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:38,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:38,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:38,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:40,183 INFO L124 PetriNetUnfolderBase]: 3801/6185 cut-off events. [2024-06-21 16:44:40,183 INFO L125 PetriNetUnfolderBase]: For 1084693/1084696 co-relation queries the response was YES. [2024-06-21 16:44:40,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56253 conditions, 6185 events. 3801/6185 cut-off events. For 1084693/1084696 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39003 event pairs, 878 based on Foata normal form. 20/6198 useless extension candidates. Maximal degree in co-relation 56133. Up to 5237 conditions per place. [2024-06-21 16:44:40,238 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 198 selfloop transitions, 87 changer transitions 0/298 dead transitions. [2024-06-21 16:44:40,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 298 transitions, 3593 flow [2024-06-21 16:44:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 16:44:40,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:44:40,240 INFO L175 Difference]: Start difference. First operand has 248 places, 258 transitions, 2875 flow. Second operand 10 states and 210 transitions. [2024-06-21 16:44:40,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 298 transitions, 3593 flow [2024-06-21 16:44:41,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 298 transitions, 3294 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:41,331 INFO L231 Difference]: Finished difference. Result has 250 places, 258 transitions, 2757 flow [2024-06-21 16:44:41,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2757, PETRI_PLACES=250, PETRI_TRANSITIONS=258} [2024-06-21 16:44:41,332 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-21 16:44:41,332 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 258 transitions, 2757 flow [2024-06-21 16:44:41,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:41,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:41,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:41,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:44:41,333 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:41,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -172300965, now seen corresponding path program 3 times [2024-06-21 16:44:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:41,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915484421] [2024-06-21 16:44:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:41,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:41,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:42,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915484421] [2024-06-21 16:44:42,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915484421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:42,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:42,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:42,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55124537] [2024-06-21 16:44:42,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:42,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:42,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 258 transitions, 2757 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:42,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:42,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:42,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:43,365 INFO L124 PetriNetUnfolderBase]: 3583/5919 cut-off events. [2024-06-21 16:44:43,365 INFO L125 PetriNetUnfolderBase]: For 1020817/1020823 co-relation queries the response was YES. [2024-06-21 16:44:43,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53990 conditions, 5919 events. 3583/5919 cut-off events. For 1020817/1020823 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38242 event pairs, 935 based on Foata normal form. 5/5847 useless extension candidates. Maximal degree in co-relation 53869. Up to 5359 conditions per place. [2024-06-21 16:44:43,420 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 219 selfloop transitions, 19 changer transitions 0/275 dead transitions. [2024-06-21 16:44:43,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 275 transitions, 3280 flow [2024-06-21 16:44:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:44:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 16:44:43,421 INFO L175 Difference]: Start difference. First operand has 250 places, 258 transitions, 2757 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:44:43,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 275 transitions, 3280 flow [2024-06-21 16:44:44,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 275 transitions, 3068 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 16:44:44,384 INFO L231 Difference]: Finished difference. Result has 248 places, 259 transitions, 2598 flow [2024-06-21 16:44:44,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2545, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2598, PETRI_PLACES=248, PETRI_TRANSITIONS=259} [2024-06-21 16:44:44,385 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-21 16:44:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 259 transitions, 2598 flow [2024-06-21 16:44:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:44,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:44,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:44:44,385 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:44,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -158968485, now seen corresponding path program 4 times [2024-06-21 16:44:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:44,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652148892] [2024-06-21 16:44:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:45,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:45,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:45,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652148892] [2024-06-21 16:44:45,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652148892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:45,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:45,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:45,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890382260] [2024-06-21 16:44:45,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:45,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:45,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:45,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:45,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:45,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:45,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 259 transitions, 2598 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:45,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:45,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:45,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:46,414 INFO L124 PetriNetUnfolderBase]: 3588/5926 cut-off events. [2024-06-21 16:44:46,414 INFO L125 PetriNetUnfolderBase]: For 1040891/1040897 co-relation queries the response was YES. [2024-06-21 16:44:46,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53873 conditions, 5926 events. 3588/5926 cut-off events. For 1040891/1040897 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38237 event pairs, 935 based on Foata normal form. 5/5854 useless extension candidates. Maximal degree in co-relation 53751. Up to 5357 conditions per place. [2024-06-21 16:44:46,469 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 211 selfloop transitions, 27 changer transitions 0/275 dead transitions. [2024-06-21 16:44:46,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 275 transitions, 3170 flow [2024-06-21 16:44:46,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:46,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:44:46,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:44:46,470 INFO L175 Difference]: Start difference. First operand has 248 places, 259 transitions, 2598 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:44:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 275 transitions, 3170 flow [2024-06-21 16:44:47,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 275 transitions, 3128 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:47,312 INFO L231 Difference]: Finished difference. Result has 250 places, 262 transitions, 2686 flow [2024-06-21 16:44:47,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2556, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2686, PETRI_PLACES=250, PETRI_TRANSITIONS=262} [2024-06-21 16:44:47,313 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-21 16:44:47,313 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 262 transitions, 2686 flow [2024-06-21 16:44:47,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:47,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:47,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:47,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:44:47,313 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:47,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:47,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1427466917, now seen corresponding path program 5 times [2024-06-21 16:44:47,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:47,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251940729] [2024-06-21 16:44:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:47,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:47,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:48,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:48,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251940729] [2024-06-21 16:44:48,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251940729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:48,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:48,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352151199] [2024-06-21 16:44:48,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:48,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:48,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 262 transitions, 2686 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:48,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:48,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:48,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:49,455 INFO L124 PetriNetUnfolderBase]: 3593/5935 cut-off events. [2024-06-21 16:44:49,455 INFO L125 PetriNetUnfolderBase]: For 1062767/1062776 co-relation queries the response was YES. [2024-06-21 16:44:49,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54547 conditions, 5935 events. 3593/5935 cut-off events. For 1062767/1062776 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38332 event pairs, 944 based on Foata normal form. 7/5863 useless extension candidates. Maximal degree in co-relation 54424. Up to 5342 conditions per place. [2024-06-21 16:44:49,526 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 201 selfloop transitions, 44 changer transitions 0/282 dead transitions. [2024-06-21 16:44:49,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 282 transitions, 3551 flow [2024-06-21 16:44:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:49,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:44:49,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:44:49,527 INFO L175 Difference]: Start difference. First operand has 250 places, 262 transitions, 2686 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:44:49,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 282 transitions, 3551 flow [2024-06-21 16:44:50,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 282 transitions, 3443 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:50,464 INFO L231 Difference]: Finished difference. Result has 253 places, 271 transitions, 2873 flow [2024-06-21 16:44:50,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2873, PETRI_PLACES=253, PETRI_TRANSITIONS=271} [2024-06-21 16:44:50,465 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-21 16:44:50,465 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 271 transitions, 2873 flow [2024-06-21 16:44:50,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:50,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:50,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:50,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:44:50,465 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:50,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:50,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1433180837, now seen corresponding path program 6 times [2024-06-21 16:44:50,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:50,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996515383] [2024-06-21 16:44:50,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:50,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:51,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:51,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996515383] [2024-06-21 16:44:51,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996515383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:51,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704375309] [2024-06-21 16:44:51,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:51,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:51,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:51,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:51,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:51,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:51,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 271 transitions, 2873 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:51,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:51,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:51,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:52,687 INFO L124 PetriNetUnfolderBase]: 3590/5931 cut-off events. [2024-06-21 16:44:52,688 INFO L125 PetriNetUnfolderBase]: For 1082838/1082847 co-relation queries the response was YES. [2024-06-21 16:44:52,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55006 conditions, 5931 events. 3590/5931 cut-off events. For 1082838/1082847 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 38287 event pairs, 944 based on Foata normal form. 7/5859 useless extension candidates. Maximal degree in co-relation 54881. Up to 5339 conditions per place. [2024-06-21 16:44:52,743 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 200 selfloop transitions, 44 changer transitions 0/281 dead transitions. [2024-06-21 16:44:52,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 281 transitions, 3385 flow [2024-06-21 16:44:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:52,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:44:52,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:44:52,744 INFO L175 Difference]: Start difference. First operand has 253 places, 271 transitions, 2873 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:44:52,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 281 transitions, 3385 flow [2024-06-21 16:44:53,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 281 transitions, 3241 flow, removed 65 selfloop flow, removed 2 redundant places. [2024-06-21 16:44:53,712 INFO L231 Difference]: Finished difference. Result has 258 places, 271 transitions, 2823 flow [2024-06-21 16:44:53,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2729, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2823, PETRI_PLACES=258, PETRI_TRANSITIONS=271} [2024-06-21 16:44:53,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-21 16:44:53,713 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 271 transitions, 2823 flow [2024-06-21 16:44:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:53,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:53,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:44:53,713 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)] === [2024-06-21 16:44:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1808676560, now seen corresponding path program 2 times [2024-06-21 16:44:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700597251] [2024-06-21 16:44:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:53,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:54,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:54,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700597251] [2024-06-21 16:44:54,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700597251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:54,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:54,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279593591] [2024-06-21 16:44:54,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:54,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:54,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:54,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:54,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:55,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:55,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 271 transitions, 2823 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:55,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:55,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:55,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:56,711 INFO L124 PetriNetUnfolderBase]: 3822/6232 cut-off events. [2024-06-21 16:44:56,711 INFO L125 PetriNetUnfolderBase]: For 1117035/1117047 co-relation queries the response was YES. [2024-06-21 16:44:56,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56598 conditions, 6232 events. 3822/6232 cut-off events. For 1117035/1117047 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39496 event pairs, 953 based on Foata normal form. 8/6230 useless extension candidates. Maximal degree in co-relation 56471. Up to 5668 conditions per place. [2024-06-21 16:44:56,771 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 249 selfloop transitions, 47 changer transitions 0/309 dead transitions. [2024-06-21 16:44:56,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 309 transitions, 3614 flow [2024-06-21 16:44:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:44:56,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:44:56,772 INFO L175 Difference]: Start difference. First operand has 258 places, 271 transitions, 2823 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:44:56,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 309 transitions, 3614 flow [2024-06-21 16:44:58,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 309 transitions, 3494 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:58,119 INFO L231 Difference]: Finished difference. Result has 263 places, 276 transitions, 2927 flow [2024-06-21 16:44:58,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2927, PETRI_PLACES=263, PETRI_TRANSITIONS=276} [2024-06-21 16:44:58,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 218 predicate places. [2024-06-21 16:44:58,119 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 276 transitions, 2927 flow [2024-06-21 16:44:58,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:58,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:58,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:58,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:44:58,120 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)] === [2024-06-21 16:44:58,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1429589316, now seen corresponding path program 3 times [2024-06-21 16:44:58,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:58,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192338177] [2024-06-21 16:44:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:58,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:59,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:59,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192338177] [2024-06-21 16:44:59,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192338177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935777003] [2024-06-21 16:44:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:59,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:59,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:59,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:59,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 276 transitions, 2927 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:44:59,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:59,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:59,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:01,192 INFO L124 PetriNetUnfolderBase]: 3839/6259 cut-off events. [2024-06-21 16:45:01,192 INFO L125 PetriNetUnfolderBase]: For 1145515/1145529 co-relation queries the response was YES. [2024-06-21 16:45:01,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57704 conditions, 6259 events. 3839/6259 cut-off events. For 1145515/1145529 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39677 event pairs, 953 based on Foata normal form. 8/6257 useless extension candidates. Maximal degree in co-relation 57576. Up to 5695 conditions per place. [2024-06-21 16:45:01,252 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 251 selfloop transitions, 50 changer transitions 0/314 dead transitions. [2024-06-21 16:45:01,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 314 transitions, 3740 flow [2024-06-21 16:45:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:01,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-21 16:45:01,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-21 16:45:01,253 INFO L175 Difference]: Start difference. First operand has 263 places, 276 transitions, 2927 flow. Second operand 10 states and 199 transitions. [2024-06-21 16:45:01,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 314 transitions, 3740 flow [2024-06-21 16:45:02,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 314 transitions, 3555 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:02,670 INFO L231 Difference]: Finished difference. Result has 267 places, 281 transitions, 2982 flow [2024-06-21 16:45:02,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2746, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2982, PETRI_PLACES=267, PETRI_TRANSITIONS=281} [2024-06-21 16:45:02,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-21 16:45:02,671 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 281 transitions, 2982 flow [2024-06-21 16:45:02,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:02,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:02,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:02,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:45:02,671 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)] === [2024-06-21 16:45:02,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash 346693770, now seen corresponding path program 4 times [2024-06-21 16:45:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705924110] [2024-06-21 16:45:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:03,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705924110] [2024-06-21 16:45:03,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705924110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:03,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:03,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:03,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596986234] [2024-06-21 16:45:03,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:03,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:03,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:03,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:03,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:04,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:04,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 281 transitions, 2982 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:04,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:04,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:04,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:05,742 INFO L124 PetriNetUnfolderBase]: 3867/6317 cut-off events. [2024-06-21 16:45:05,743 INFO L125 PetriNetUnfolderBase]: For 1172284/1172300 co-relation queries the response was YES. [2024-06-21 16:45:05,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58701 conditions, 6317 events. 3867/6317 cut-off events. For 1172284/1172300 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40251 event pairs, 968 based on Foata normal form. 8/6315 useless extension candidates. Maximal degree in co-relation 58571. Up to 5734 conditions per place. [2024-06-21 16:45:05,807 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 248 selfloop transitions, 60 changer transitions 0/321 dead transitions. [2024-06-21 16:45:05,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 321 transitions, 3836 flow [2024-06-21 16:45:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-21 16:45:05,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-21 16:45:05,809 INFO L175 Difference]: Start difference. First operand has 267 places, 281 transitions, 2982 flow. Second operand 10 states and 197 transitions. [2024-06-21 16:45:05,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 321 transitions, 3836 flow [2024-06-21 16:45:07,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 321 transitions, 3633 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:07,222 INFO L231 Difference]: Finished difference. Result has 271 places, 289 transitions, 3088 flow [2024-06-21 16:45:07,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3088, PETRI_PLACES=271, PETRI_TRANSITIONS=289} [2024-06-21 16:45:07,222 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-21 16:45:07,222 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 289 transitions, 3088 flow [2024-06-21 16:45:07,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:07,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:07,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:45:07,223 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)] === [2024-06-21 16:45:07,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash 357169290, now seen corresponding path program 5 times [2024-06-21 16:45:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657206363] [2024-06-21 16:45:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:08,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:08,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657206363] [2024-06-21 16:45:08,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657206363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:08,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:08,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:08,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647766491] [2024-06-21 16:45:08,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:08,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:08,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:08,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:08,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:08,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:08,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 289 transitions, 3088 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:08,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:08,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:08,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:10,035 INFO L124 PetriNetUnfolderBase]: 3884/6324 cut-off events. [2024-06-21 16:45:10,036 INFO L125 PetriNetUnfolderBase]: For 1198907/1198925 co-relation queries the response was YES. [2024-06-21 16:45:10,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59620 conditions, 6324 events. 3884/6324 cut-off events. For 1198907/1198925 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40114 event pairs, 884 based on Foata normal form. 8/6322 useless extension candidates. Maximal degree in co-relation 59488. Up to 5642 conditions per place. [2024-06-21 16:45:10,103 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 244 selfloop transitions, 71 changer transitions 0/328 dead transitions. [2024-06-21 16:45:10,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 328 transitions, 4350 flow [2024-06-21 16:45:10,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:10,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-21 16:45:10,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:45:10,104 INFO L175 Difference]: Start difference. First operand has 271 places, 289 transitions, 3088 flow. Second operand 10 states and 200 transitions. [2024-06-21 16:45:10,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 328 transitions, 4350 flow [2024-06-21 16:45:11,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 328 transitions, 4171 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:11,564 INFO L231 Difference]: Finished difference. Result has 276 places, 293 transitions, 3270 flow [2024-06-21 16:45:11,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3270, PETRI_PLACES=276, PETRI_TRANSITIONS=293} [2024-06-21 16:45:11,564 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 16:45:11,564 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 293 transitions, 3270 flow [2024-06-21 16:45:11,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:11,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:11,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:11,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:45:11,565 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)] === [2024-06-21 16:45:11,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash -607550478, now seen corresponding path program 6 times [2024-06-21 16:45:11,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250363620] [2024-06-21 16:45:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:11,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:12,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:12,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250363620] [2024-06-21 16:45:12,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250363620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:12,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:12,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:45:12,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677004622] [2024-06-21 16:45:12,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:12,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:45:12,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:45:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:45:12,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 293 transitions, 3270 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:14,498 INFO L124 PetriNetUnfolderBase]: 3876/6312 cut-off events. [2024-06-21 16:45:14,499 INFO L125 PetriNetUnfolderBase]: For 1202357/1202375 co-relation queries the response was YES. [2024-06-21 16:45:14,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58054 conditions, 6312 events. 3876/6312 cut-off events. For 1202357/1202375 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39989 event pairs, 946 based on Foata normal form. 8/6310 useless extension candidates. Maximal degree in co-relation 57921. Up to 5749 conditions per place. [2024-06-21 16:45:14,567 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 255 selfloop transitions, 57 changer transitions 0/325 dead transitions. [2024-06-21 16:45:14,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 325 transitions, 3974 flow [2024-06-21 16:45:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:45:14,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:45:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-21 16:45:14,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 16:45:14,568 INFO L175 Difference]: Start difference. First operand has 276 places, 293 transitions, 3270 flow. Second operand 10 states and 198 transitions. [2024-06-21 16:45:14,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 325 transitions, 3974 flow [2024-06-21 16:45:16,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 325 transitions, 3720 flow, removed 91 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:16,632 INFO L231 Difference]: Finished difference. Result has 280 places, 293 transitions, 3137 flow [2024-06-21 16:45:16,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3137, PETRI_PLACES=280, PETRI_TRANSITIONS=293} [2024-06-21 16:45:16,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 235 predicate places. [2024-06-21 16:45:16,633 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 293 transitions, 3137 flow [2024-06-21 16:45:16,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 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) [2024-06-21 16:45:16,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:16,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:45:16,633 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:16,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:16,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1433170917, now seen corresponding path program 2 times [2024-06-21 16:45:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:16,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597167665] [2024-06-21 16:45:16,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:16,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:17,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:17,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597167665] [2024-06-21 16:45:17,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597167665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:17,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:17,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:17,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063119663] [2024-06-21 16:45:17,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:17,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:17,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:17,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:17,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:17,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:17,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 293 transitions, 3137 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:17,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:17,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:17,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:18,922 INFO L124 PetriNetUnfolderBase]: 3573/5927 cut-off events. [2024-06-21 16:45:18,922 INFO L125 PetriNetUnfolderBase]: For 1204905/1204933 co-relation queries the response was YES. [2024-06-21 16:45:18,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55499 conditions, 5927 events. 3573/5927 cut-off events. For 1204905/1204933 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 38684 event pairs, 925 based on Foata normal form. 5/5841 useless extension candidates. Maximal degree in co-relation 55364. Up to 5290 conditions per place. [2024-06-21 16:45:18,986 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 215 selfloop transitions, 40 changer transitions 0/314 dead transitions. [2024-06-21 16:45:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 314 transitions, 3991 flow [2024-06-21 16:45:18,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:45:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:45:18,987 INFO L175 Difference]: Start difference. First operand has 280 places, 293 transitions, 3137 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:45:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 314 transitions, 3991 flow [2024-06-21 16:45:21,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 314 transitions, 3802 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-21 16:45:21,099 INFO L231 Difference]: Finished difference. Result has 276 places, 302 transitions, 3182 flow [2024-06-21 16:45:21,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3182, PETRI_PLACES=276, PETRI_TRANSITIONS=302} [2024-06-21 16:45:21,100 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 16:45:21,100 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 302 transitions, 3182 flow [2024-06-21 16:45:21,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:21,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:21,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:21,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:45:21,100 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:21,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1418438787, now seen corresponding path program 3 times [2024-06-21 16:45:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:21,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917934577] [2024-06-21 16:45:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:22,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917934577] [2024-06-21 16:45:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917934577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:22,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:22,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:22,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767400340] [2024-06-21 16:45:22,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:22,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:22,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:22,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 302 transitions, 3182 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:23,448 INFO L124 PetriNetUnfolderBase]: 3580/5939 cut-off events. [2024-06-21 16:45:23,449 INFO L125 PetriNetUnfolderBase]: For 1231063/1231081 co-relation queries the response was YES. [2024-06-21 16:45:23,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56053 conditions, 5939 events. 3580/5939 cut-off events. For 1231063/1231081 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38741 event pairs, 925 based on Foata normal form. 5/5854 useless extension candidates. Maximal degree in co-relation 55920. Up to 5298 conditions per place. [2024-06-21 16:45:23,510 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 213 selfloop transitions, 45 changer transitions 0/317 dead transitions. [2024-06-21 16:45:23,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 317 transitions, 3984 flow [2024-06-21 16:45:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:45:23,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:45:23,511 INFO L175 Difference]: Start difference. First operand has 276 places, 302 transitions, 3182 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:45:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 317 transitions, 3984 flow [2024-06-21 16:45:25,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 317 transitions, 3909 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 16:45:25,353 INFO L231 Difference]: Finished difference. Result has 281 places, 305 transitions, 3263 flow [2024-06-21 16:45:25,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3263, PETRI_PLACES=281, PETRI_TRANSITIONS=305} [2024-06-21 16:45:25,354 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-21 16:45:25,354 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 305 transitions, 3263 flow [2024-06-21 16:45:25,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:25,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:25,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:25,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:45:25,355 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:25,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1092684087, now seen corresponding path program 4 times [2024-06-21 16:45:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:25,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661928753] [2024-06-21 16:45:25,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:26,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:26,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661928753] [2024-06-21 16:45:26,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661928753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:26,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:26,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030942641] [2024-06-21 16:45:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:26,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:26,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:26,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 305 transitions, 3263 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:26,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:26,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:26,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:27,671 INFO L124 PetriNetUnfolderBase]: 3574/5931 cut-off events. [2024-06-21 16:45:27,671 INFO L125 PetriNetUnfolderBase]: For 1244384/1244396 co-relation queries the response was YES. [2024-06-21 16:45:27,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56076 conditions, 5931 events. 3574/5931 cut-off events. For 1244384/1244396 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 38719 event pairs, 924 based on Foata normal form. 14/5855 useless extension candidates. Maximal degree in co-relation 55941. Up to 5293 conditions per place. [2024-06-21 16:45:27,730 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 210 selfloop transitions, 47 changer transitions 0/316 dead transitions. [2024-06-21 16:45:27,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 316 transitions, 3803 flow [2024-06-21 16:45:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:45:27,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:45:27,732 INFO L175 Difference]: Start difference. First operand has 281 places, 305 transitions, 3263 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:45:27,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 316 transitions, 3803 flow [2024-06-21 16:45:29,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 316 transitions, 3649 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:29,838 INFO L231 Difference]: Finished difference. Result has 284 places, 305 transitions, 3209 flow [2024-06-21 16:45:29,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3209, PETRI_PLACES=284, PETRI_TRANSITIONS=305} [2024-06-21 16:45:29,839 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-21 16:45:29,839 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 305 transitions, 3209 flow [2024-06-21 16:45:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:29,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:29,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:29,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:45:29,840 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:29,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1478740333, now seen corresponding path program 1 times [2024-06-21 16:45:29,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:29,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122664392] [2024-06-21 16:45:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:29,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122664392] [2024-06-21 16:45:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122664392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:30,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685278214] [2024-06-21 16:45:30,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:30,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:30,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:30,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:30,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:30,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 305 transitions, 3209 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:32,219 INFO L124 PetriNetUnfolderBase]: 3767/6212 cut-off events. [2024-06-21 16:45:32,220 INFO L125 PetriNetUnfolderBase]: For 1276097/1276097 co-relation queries the response was YES. [2024-06-21 16:45:32,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57917 conditions, 6212 events. 3767/6212 cut-off events. For 1276097/1276097 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39892 event pairs, 903 based on Foata normal form. 2/6207 useless extension candidates. Maximal degree in co-relation 57781. Up to 5702 conditions per place. [2024-06-21 16:45:32,289 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 293 selfloop transitions, 17 changer transitions 0/329 dead transitions. [2024-06-21 16:45:32,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 329 transitions, 3949 flow [2024-06-21 16:45:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:45:32,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:45:32,290 INFO L175 Difference]: Start difference. First operand has 284 places, 305 transitions, 3209 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:45:32,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 329 transitions, 3949 flow [2024-06-21 16:45:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 329 transitions, 3863 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:34,030 INFO L231 Difference]: Finished difference. Result has 286 places, 308 transitions, 3235 flow [2024-06-21 16:45:34,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3235, PETRI_PLACES=286, PETRI_TRANSITIONS=308} [2024-06-21 16:45:34,031 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-21 16:45:34,031 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 308 transitions, 3235 flow [2024-06-21 16:45:34,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:34,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:34,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:34,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:45:34,032 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:34,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -164524522, now seen corresponding path program 1 times [2024-06-21 16:45:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907064521] [2024-06-21 16:45:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:34,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:34,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907064521] [2024-06-21 16:45:34,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907064521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:34,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:34,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:34,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820404073] [2024-06-21 16:45:34,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:34,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:34,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:34,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:34,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:35,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:35,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 308 transitions, 3235 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:35,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:35,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:35,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:36,317 INFO L124 PetriNetUnfolderBase]: 3887/6338 cut-off events. [2024-06-21 16:45:36,317 INFO L125 PetriNetUnfolderBase]: For 1293807/1293807 co-relation queries the response was YES. [2024-06-21 16:45:36,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59428 conditions, 6338 events. 3887/6338 cut-off events. For 1293807/1293807 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40127 event pairs, 940 based on Foata normal form. 1/6336 useless extension candidates. Maximal degree in co-relation 59291. Up to 5942 conditions per place. [2024-06-21 16:45:36,390 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 300 selfloop transitions, 17 changer transitions 0/328 dead transitions. [2024-06-21 16:45:36,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 328 transitions, 3985 flow [2024-06-21 16:45:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:36,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:36,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:45:36,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:45:36,391 INFO L175 Difference]: Start difference. First operand has 286 places, 308 transitions, 3235 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:45:36,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 328 transitions, 3985 flow [2024-06-21 16:45:38,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 328 transitions, 3895 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:38,515 INFO L231 Difference]: Finished difference. Result has 288 places, 311 transitions, 3265 flow [2024-06-21 16:45:38,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3145, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=288, PETRI_TRANSITIONS=311} [2024-06-21 16:45:38,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-21 16:45:38,515 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 311 transitions, 3265 flow [2024-06-21 16:45:38,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:38,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:38,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:38,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:45:38,516 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:38,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:38,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1478890063, now seen corresponding path program 2 times [2024-06-21 16:45:38,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:38,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274072042] [2024-06-21 16:45:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:38,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274072042] [2024-06-21 16:45:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274072042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:39,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:39,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:39,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50229801] [2024-06-21 16:45:39,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:39,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:39,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:39,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:39,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:39,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:39,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 311 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:39,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:39,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:39,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:40,768 INFO L124 PetriNetUnfolderBase]: 3792/6255 cut-off events. [2024-06-21 16:45:40,768 INFO L125 PetriNetUnfolderBase]: For 1326011/1326011 co-relation queries the response was YES. [2024-06-21 16:45:40,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59412 conditions, 6255 events. 3792/6255 cut-off events. For 1326011/1326011 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40298 event pairs, 912 based on Foata normal form. 2/6250 useless extension candidates. Maximal degree in co-relation 59274. Up to 5722 conditions per place. [2024-06-21 16:45:40,842 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 22 changer transitions 0/333 dead transitions. [2024-06-21 16:45:40,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 333 transitions, 4015 flow [2024-06-21 16:45:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:40,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:40,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:45:40,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:45:40,844 INFO L175 Difference]: Start difference. First operand has 288 places, 311 transitions, 3265 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:45:40,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 333 transitions, 4015 flow [2024-06-21 16:45:42,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 333 transitions, 3917 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:42,384 INFO L231 Difference]: Finished difference. Result has 290 places, 314 transitions, 3297 flow [2024-06-21 16:45:42,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3167, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3297, PETRI_PLACES=290, PETRI_TRANSITIONS=314} [2024-06-21 16:45:42,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-21 16:45:42,384 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 314 transitions, 3297 flow [2024-06-21 16:45:42,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:42,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:42,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:42,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:45:42,385 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:42,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:42,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1484461910, now seen corresponding path program 2 times [2024-06-21 16:45:42,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:42,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634527574] [2024-06-21 16:45:42,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:42,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:42,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:43,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634527574] [2024-06-21 16:45:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634527574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:43,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:43,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:43,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344429625] [2024-06-21 16:45:43,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:43,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:43,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:43,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:43,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 314 transitions, 3297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:43,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:43,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:43,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:44,585 INFO L124 PetriNetUnfolderBase]: 3910/6372 cut-off events. [2024-06-21 16:45:44,586 INFO L125 PetriNetUnfolderBase]: For 1349531/1349531 co-relation queries the response was YES. [2024-06-21 16:45:44,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61038 conditions, 6372 events. 3910/6372 cut-off events. For 1349531/1349531 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40403 event pairs, 940 based on Foata normal form. 1/6370 useless extension candidates. Maximal degree in co-relation 60899. Up to 5958 conditions per place. [2024-06-21 16:45:44,658 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 30 changer transitions 0/335 dead transitions. [2024-06-21 16:45:44,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 335 transitions, 4353 flow [2024-06-21 16:45:44,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:45:44,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:45:44,659 INFO L175 Difference]: Start difference. First operand has 290 places, 314 transitions, 3297 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:45:44,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 335 transitions, 4353 flow [2024-06-21 16:45:46,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 335 transitions, 4245 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:46,493 INFO L231 Difference]: Finished difference. Result has 292 places, 320 transitions, 3425 flow [2024-06-21 16:45:46,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=292, PETRI_TRANSITIONS=320} [2024-06-21 16:45:46,493 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-21 16:45:46,493 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 320 transitions, 3425 flow [2024-06-21 16:45:46,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:46,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:46,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:46,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:45:46,494 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:46,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:46,494 INFO L85 PathProgramCache]: Analyzing trace with hash 826666329, now seen corresponding path program 1 times [2024-06-21 16:45:46,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:46,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483041321] [2024-06-21 16:45:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:47,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:47,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483041321] [2024-06-21 16:45:47,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483041321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:47,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:47,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:47,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697439085] [2024-06-21 16:45:47,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:47,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:47,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:47,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:47,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:47,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:47,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 320 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:47,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:47,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:47,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:48,835 INFO L124 PetriNetUnfolderBase]: 3708/6124 cut-off events. [2024-06-21 16:45:48,835 INFO L125 PetriNetUnfolderBase]: For 1378377/1378377 co-relation queries the response was YES. [2024-06-21 16:45:48,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60202 conditions, 6124 events. 3708/6124 cut-off events. For 1378377/1378377 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39687 event pairs, 899 based on Foata normal form. 2/6051 useless extension candidates. Maximal degree in co-relation 60062. Up to 5560 conditions per place. [2024-06-21 16:45:48,903 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 282 selfloop transitions, 17 changer transitions 0/337 dead transitions. [2024-06-21 16:45:48,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 337 transitions, 4131 flow [2024-06-21 16:45:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:45:48,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:45:48,905 INFO L175 Difference]: Start difference. First operand has 292 places, 320 transitions, 3425 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:45:48,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 337 transitions, 4131 flow [2024-06-21 16:45:51,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 337 transitions, 4023 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:51,216 INFO L231 Difference]: Finished difference. Result has 296 places, 323 transitions, 3437 flow [2024-06-21 16:45:51,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3317, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3437, PETRI_PLACES=296, PETRI_TRANSITIONS=323} [2024-06-21 16:45:51,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-21 16:45:51,217 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 323 transitions, 3437 flow [2024-06-21 16:45:51,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:51,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:51,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:51,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:45:51,217 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:51,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash 1484454470, now seen corresponding path program 3 times [2024-06-21 16:45:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:51,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826018841] [2024-06-21 16:45:51,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:52,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:52,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826018841] [2024-06-21 16:45:52,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826018841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:52,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:52,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314553143] [2024-06-21 16:45:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:52,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:52,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:52,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:52,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 323 transitions, 3437 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:52,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:52,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:53,789 INFO L124 PetriNetUnfolderBase]: 3912/6387 cut-off events. [2024-06-21 16:45:53,789 INFO L125 PetriNetUnfolderBase]: For 1393350/1393350 co-relation queries the response was YES. [2024-06-21 16:45:53,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61904 conditions, 6387 events. 3912/6387 cut-off events. For 1393350/1393350 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40625 event pairs, 949 based on Foata normal form. 1/6385 useless extension candidates. Maximal degree in co-relation 61762. Up to 5962 conditions per place. [2024-06-21 16:45:53,851 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 297 selfloop transitions, 29 changer transitions 0/337 dead transitions. [2024-06-21 16:45:53,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 337 transitions, 4123 flow [2024-06-21 16:45:53,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:53,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:45:53,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:45:53,852 INFO L175 Difference]: Start difference. First operand has 296 places, 323 transitions, 3437 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:45:53,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 337 transitions, 4123 flow [2024-06-21 16:45:56,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 337 transitions, 3973 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:56,115 INFO L231 Difference]: Finished difference. Result has 298 places, 323 transitions, 3351 flow [2024-06-21 16:45:56,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3351, PETRI_PLACES=298, PETRI_TRANSITIONS=323} [2024-06-21 16:45:56,115 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-21 16:45:56,115 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 323 transitions, 3351 flow [2024-06-21 16:45:56,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:56,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:56,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:45:56,116 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:56,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:56,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1484454253, now seen corresponding path program 3 times [2024-06-21 16:45:56,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:56,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226955361] [2024-06-21 16:45:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:57,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:57,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226955361] [2024-06-21 16:45:57,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226955361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:57,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:57,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:57,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150972078] [2024-06-21 16:45:57,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:57,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:57,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:57,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:57,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:57,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 323 transitions, 3351 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:45:57,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:57,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:57,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:58,589 INFO L124 PetriNetUnfolderBase]: 3816/6293 cut-off events. [2024-06-21 16:45:58,589 INFO L125 PetriNetUnfolderBase]: For 1427174/1427174 co-relation queries the response was YES. [2024-06-21 16:45:58,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61610 conditions, 6293 events. 3816/6293 cut-off events. For 1427174/1427174 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40583 event pairs, 911 based on Foata normal form. 2/6288 useless extension candidates. Maximal degree in co-relation 61467. Up to 5740 conditions per place. [2024-06-21 16:45:58,667 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 29 changer transitions 0/342 dead transitions. [2024-06-21 16:45:58,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 342 transitions, 4117 flow [2024-06-21 16:45:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:45:58,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:45:58,668 INFO L175 Difference]: Start difference. First operand has 298 places, 323 transitions, 3351 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:45:58,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 342 transitions, 4117 flow [2024-06-21 16:46:00,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 342 transitions, 4037 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:00,796 INFO L231 Difference]: Finished difference. Result has 299 places, 326 transitions, 3425 flow [2024-06-21 16:46:00,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=299, PETRI_TRANSITIONS=326} [2024-06-21 16:46:00,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-21 16:46:00,796 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 326 transitions, 3425 flow [2024-06-21 16:46:00,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:00,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:00,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:00,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:46:00,797 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:00,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:00,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1427458981, now seen corresponding path program 4 times [2024-06-21 16:46:00,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:00,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943406653] [2024-06-21 16:46:00,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:00,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:01,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:01,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943406653] [2024-06-21 16:46:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943406653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:01,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649366150] [2024-06-21 16:46:01,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:01,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:01,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:01,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:01,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:01,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:01,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 326 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:01,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:01,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:01,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:03,132 INFO L124 PetriNetUnfolderBase]: 3818/6299 cut-off events. [2024-06-21 16:46:03,132 INFO L125 PetriNetUnfolderBase]: For 1448670/1448673 co-relation queries the response was YES. [2024-06-21 16:46:03,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62290 conditions, 6299 events. 3818/6299 cut-off events. For 1448670/1448673 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40597 event pairs, 923 based on Foata normal form. 2/6293 useless extension candidates. Maximal degree in co-relation 62146. Up to 5728 conditions per place. [2024-06-21 16:46:03,208 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 282 selfloop transitions, 38 changer transitions 0/342 dead transitions. [2024-06-21 16:46:03,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 342 transitions, 4189 flow [2024-06-21 16:46:03,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:03,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:03,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:46:03,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:46:03,209 INFO L175 Difference]: Start difference. First operand has 299 places, 326 transitions, 3425 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:46:03,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 342 transitions, 4189 flow [2024-06-21 16:46:05,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 342 transitions, 4057 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:05,589 INFO L231 Difference]: Finished difference. Result has 301 places, 329 transitions, 3471 flow [2024-06-21 16:46:05,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=301, PETRI_TRANSITIONS=329} [2024-06-21 16:46:05,590 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 256 predicate places. [2024-06-21 16:46:05,590 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 329 transitions, 3471 flow [2024-06-21 16:46:05,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:05,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:05,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:05,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:46:05,590 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:05,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:05,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1427458764, now seen corresponding path program 4 times [2024-06-21 16:46:05,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:05,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083224434] [2024-06-21 16:46:05,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:05,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:06,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:06,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:06,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083224434] [2024-06-21 16:46:06,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083224434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:06,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:06,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:06,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96472377] [2024-06-21 16:46:06,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:06,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:06,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:06,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:06,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:06,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:06,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 329 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:06,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:06,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:06,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:08,007 INFO L124 PetriNetUnfolderBase]: 3929/6406 cut-off events. [2024-06-21 16:46:08,007 INFO L125 PetriNetUnfolderBase]: For 1466404/1466407 co-relation queries the response was YES. [2024-06-21 16:46:08,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63629 conditions, 6406 events. 3929/6406 cut-off events. For 1466404/1466407 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40680 event pairs, 947 based on Foata normal form. 1/6403 useless extension candidates. Maximal degree in co-relation 63484. Up to 5959 conditions per place. [2024-06-21 16:46:08,082 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 289 selfloop transitions, 47 changer transitions 0/347 dead transitions. [2024-06-21 16:46:08,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 347 transitions, 4577 flow [2024-06-21 16:46:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:08,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:46:08,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-21 16:46:08,084 INFO L175 Difference]: Start difference. First operand has 301 places, 329 transitions, 3471 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:46:08,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 347 transitions, 4577 flow [2024-06-21 16:46:10,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 347 transitions, 4421 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:10,635 INFO L231 Difference]: Finished difference. Result has 303 places, 335 transitions, 3609 flow [2024-06-21 16:46:10,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=303, PETRI_TRANSITIONS=335} [2024-06-21 16:46:10,635 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-21 16:46:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 335 transitions, 3609 flow [2024-06-21 16:46:10,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:10,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:10,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:10,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:46:10,636 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:10,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1427451324, now seen corresponding path program 5 times [2024-06-21 16:46:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191123124] [2024-06-21 16:46:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:11,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:11,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191123124] [2024-06-21 16:46:11,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191123124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:11,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:11,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090798439] [2024-06-21 16:46:11,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:11,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:11,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:11,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:11,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 335 transitions, 3609 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:11,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:11,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:11,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:13,010 INFO L124 PetriNetUnfolderBase]: 3934/6423 cut-off events. [2024-06-21 16:46:13,010 INFO L125 PetriNetUnfolderBase]: For 1494145/1494148 co-relation queries the response was YES. [2024-06-21 16:46:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64127 conditions, 6423 events. 3934/6423 cut-off events. For 1494145/1494148 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40904 event pairs, 957 based on Foata normal form. 1/6420 useless extension candidates. Maximal degree in co-relation 63981. Up to 5965 conditions per place. [2024-06-21 16:46:13,082 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 49 changer transitions 0/350 dead transitions. [2024-06-21 16:46:13,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 350 transitions, 4635 flow [2024-06-21 16:46:13,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:46:13,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:46:13,084 INFO L175 Difference]: Start difference. First operand has 303 places, 335 transitions, 3609 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:46:13,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 350 transitions, 4635 flow [2024-06-21 16:46:15,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 350 transitions, 4435 flow, removed 67 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:15,652 INFO L231 Difference]: Finished difference. Result has 306 places, 338 transitions, 3613 flow [2024-06-21 16:46:15,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=306, PETRI_TRANSITIONS=338} [2024-06-21 16:46:15,652 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 16:46:15,653 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 338 transitions, 3613 flow [2024-06-21 16:46:15,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:15,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:15,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:15,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:46:15,653 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:15,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1427451045, now seen corresponding path program 2 times [2024-06-21 16:46:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:15,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548730902] [2024-06-21 16:46:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:15,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:16,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548730902] [2024-06-21 16:46:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548730902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:16,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:16,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:16,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456859903] [2024-06-21 16:46:16,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:16,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:16,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:16,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:16,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:16,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 338 transitions, 3613 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:16,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:16,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:16,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:18,174 INFO L124 PetriNetUnfolderBase]: 3731/6164 cut-off events. [2024-06-21 16:46:18,174 INFO L125 PetriNetUnfolderBase]: For 1518971/1518974 co-relation queries the response was YES. [2024-06-21 16:46:18,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62724 conditions, 6164 events. 3731/6164 cut-off events. For 1518971/1518974 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39983 event pairs, 903 based on Foata normal form. 4/6092 useless extension candidates. Maximal degree in co-relation 62577. Up to 5560 conditions per place. [2024-06-21 16:46:18,235 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 278 selfloop transitions, 37 changer transitions 0/356 dead transitions. [2024-06-21 16:46:18,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 356 transitions, 4661 flow [2024-06-21 16:46:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:18,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:46:18,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:46:18,236 INFO L175 Difference]: Start difference. First operand has 306 places, 338 transitions, 3613 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:46:18,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 356 transitions, 4661 flow [2024-06-21 16:46:20,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 356 transitions, 4511 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:20,582 INFO L231 Difference]: Finished difference. Result has 309 places, 344 transitions, 3717 flow [2024-06-21 16:46:20,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3717, PETRI_PLACES=309, PETRI_TRANSITIONS=344} [2024-06-21 16:46:20,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 264 predicate places. [2024-06-21 16:46:20,582 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 344 transitions, 3717 flow [2024-06-21 16:46:20,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:20,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:20,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:20,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:46:20,583 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:20,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:20,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1418254554, now seen corresponding path program 6 times [2024-06-21 16:46:20,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:20,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878784966] [2024-06-21 16:46:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:20,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:21,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:21,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878784966] [2024-06-21 16:46:21,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878784966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:21,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:21,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:21,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209476560] [2024-06-21 16:46:21,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:21,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:21,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:21,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:21,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:21,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 344 transitions, 3717 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:21,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:21,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:21,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:22,945 INFO L124 PetriNetUnfolderBase]: 3936/6428 cut-off events. [2024-06-21 16:46:22,945 INFO L125 PetriNetUnfolderBase]: For 1538071/1538074 co-relation queries the response was YES. [2024-06-21 16:46:22,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64372 conditions, 6428 events. 3936/6428 cut-off events. For 1538071/1538074 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 40901 event pairs, 957 based on Foata normal form. 1/6425 useless extension candidates. Maximal degree in co-relation 64224. Up to 5969 conditions per place. [2024-06-21 16:46:23,022 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 292 selfloop transitions, 52 changer transitions 0/355 dead transitions. [2024-06-21 16:46:23,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 355 transitions, 4431 flow [2024-06-21 16:46:23,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:46:23,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:46:23,023 INFO L175 Difference]: Start difference. First operand has 309 places, 344 transitions, 3717 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:46:23,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 355 transitions, 4431 flow [2024-06-21 16:46:25,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 355 transitions, 4253 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:25,610 INFO L231 Difference]: Finished difference. Result has 313 places, 344 transitions, 3649 flow [2024-06-21 16:46:25,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3539, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=313, PETRI_TRANSITIONS=344} [2024-06-21 16:46:25,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-21 16:46:25,611 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 344 transitions, 3649 flow [2024-06-21 16:46:25,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:25,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:25,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:25,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:46:25,611 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)] === [2024-06-21 16:46:25,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:25,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1418254275, now seen corresponding path program 3 times [2024-06-21 16:46:25,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:25,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017583952] [2024-06-21 16:46:25,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:26,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:26,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017583952] [2024-06-21 16:46:26,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017583952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:26,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:26,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:26,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107828633] [2024-06-21 16:46:26,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:26,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:26,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:26,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:26,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 344 transitions, 3649 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:26,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:26,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:26,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:27,935 INFO L124 PetriNetUnfolderBase]: 3733/6169 cut-off events. [2024-06-21 16:46:27,935 INFO L125 PetriNetUnfolderBase]: For 1566118/1566121 co-relation queries the response was YES. [2024-06-21 16:46:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63305 conditions, 6169 events. 3733/6169 cut-off events. For 1566118/1566121 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40040 event pairs, 903 based on Foata normal form. 4/6097 useless extension candidates. Maximal degree in co-relation 63155. Up to 5563 conditions per place. [2024-06-21 16:46:28,013 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 277 selfloop transitions, 41 changer transitions 0/359 dead transitions. [2024-06-21 16:46:28,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 359 transitions, 4623 flow [2024-06-21 16:46:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:46:28,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:46:28,015 INFO L175 Difference]: Start difference. First operand has 313 places, 344 transitions, 3649 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:46:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 359 transitions, 4623 flow [2024-06-21 16:46:30,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 359 transitions, 4495 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:30,587 INFO L231 Difference]: Finished difference. Result has 313 places, 347 transitions, 3693 flow [2024-06-21 16:46:30,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3693, PETRI_PLACES=313, PETRI_TRANSITIONS=347} [2024-06-21 16:46:30,587 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-21 16:46:30,587 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 347 transitions, 3693 flow [2024-06-21 16:46:30,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:30,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:30,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:30,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:46:30,587 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)] === [2024-06-21 16:46:30,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:30,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1417927845, now seen corresponding path program 4 times [2024-06-21 16:46:30,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:30,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216365633] [2024-06-21 16:46:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:31,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:31,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216365633] [2024-06-21 16:46:31,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216365633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:31,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:31,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:31,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319676392] [2024-06-21 16:46:31,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:31,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:31,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:31,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:31,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 347 transitions, 3693 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:31,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:32,980 INFO L124 PetriNetUnfolderBase]: 3727/6161 cut-off events. [2024-06-21 16:46:32,980 INFO L125 PetriNetUnfolderBase]: For 1579463/1579466 co-relation queries the response was YES. [2024-06-21 16:46:33,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63190 conditions, 6161 events. 3727/6161 cut-off events. For 1579463/1579466 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 39971 event pairs, 902 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 63039. Up to 5558 conditions per place. [2024-06-21 16:46:33,051 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 274 selfloop transitions, 43 changer transitions 0/358 dead transitions. [2024-06-21 16:46:33,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 358 transitions, 4353 flow [2024-06-21 16:46:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:46:33,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:46:33,052 INFO L175 Difference]: Start difference. First operand has 313 places, 347 transitions, 3693 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:46:33,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 358 transitions, 4353 flow [2024-06-21 16:46:35,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 358 transitions, 4131 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:35,571 INFO L231 Difference]: Finished difference. Result has 315 places, 347 transitions, 3564 flow [2024-06-21 16:46:35,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3471, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3564, PETRI_PLACES=315, PETRI_TRANSITIONS=347} [2024-06-21 16:46:35,572 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-21 16:46:35,572 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 347 transitions, 3564 flow [2024-06-21 16:46:35,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:35,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:35,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:35,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:46:35,572 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)] === [2024-06-21 16:46:35,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:35,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1417915941, now seen corresponding path program 1 times [2024-06-21 16:46:35,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:35,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911300464] [2024-06-21 16:46:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:35,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:35,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:37,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911300464] [2024-06-21 16:46:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911300464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:37,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274528673] [2024-06-21 16:46:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:37,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:37,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 347 transitions, 3564 flow. Second operand has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:37,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:37,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:37,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:38,510 INFO L124 PetriNetUnfolderBase]: 3648/6066 cut-off events. [2024-06-21 16:46:38,510 INFO L125 PetriNetUnfolderBase]: For 1592770/1592778 co-relation queries the response was YES. [2024-06-21 16:46:38,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62372 conditions, 6066 events. 3648/6066 cut-off events. For 1592770/1592778 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 39803 event pairs, 922 based on Foata normal form. 1/5983 useless extension candidates. Maximal degree in co-relation 62220. Up to 5438 conditions per place. [2024-06-21 16:46:38,574 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 277 selfloop transitions, 20 changer transitions 0/362 dead transitions. [2024-06-21 16:46:38,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 362 transitions, 4262 flow [2024-06-21 16:46:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:38,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:46:38,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-21 16:46:38,575 INFO L175 Difference]: Start difference. First operand has 315 places, 347 transitions, 3564 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:46:38,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 362 transitions, 4262 flow [2024-06-21 16:46:40,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 362 transitions, 4166 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:40,696 INFO L231 Difference]: Finished difference. Result has 317 places, 350 transitions, 3596 flow [2024-06-21 16:46:40,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3596, PETRI_PLACES=317, PETRI_TRANSITIONS=350} [2024-06-21 16:46:40,696 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-21 16:46:40,696 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 350 transitions, 3596 flow [2024-06-21 16:46:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.454545454545455) internal successors, (148), 11 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:40,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:40,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:46:40,697 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)] === [2024-06-21 16:46:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:40,697 INFO L85 PathProgramCache]: Analyzing trace with hash 413290487, now seen corresponding path program 1 times [2024-06-21 16:46:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7782204] [2024-06-21 16:46:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:41,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7782204] [2024-06-21 16:46:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7782204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161953870] [2024-06-21 16:46:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:41,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:41,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:41,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:41,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 350 transitions, 3596 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:41,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:41,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:41,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:43,021 INFO L124 PetriNetUnfolderBase]: 3753/6183 cut-off events. [2024-06-21 16:46:43,022 INFO L125 PetriNetUnfolderBase]: For 1622728/1622728 co-relation queries the response was YES. [2024-06-21 16:46:43,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64009 conditions, 6183 events. 3753/6183 cut-off events. For 1622728/1622728 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40013 event pairs, 892 based on Foata normal form. 1/6101 useless extension candidates. Maximal degree in co-relation 63856. Up to 5590 conditions per place. [2024-06-21 16:46:43,102 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 313 selfloop transitions, 17 changer transitions 0/379 dead transitions. [2024-06-21 16:46:43,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 379 transitions, 4416 flow [2024-06-21 16:46:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:46:43,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 16:46:43,103 INFO L175 Difference]: Start difference. First operand has 317 places, 350 transitions, 3596 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:46:43,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 379 transitions, 4416 flow [2024-06-21 16:46:45,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 379 transitions, 4234 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-21 16:46:45,914 INFO L231 Difference]: Finished difference. Result has 315 places, 353 transitions, 3554 flow [2024-06-21 16:46:45,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3414, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3554, PETRI_PLACES=315, PETRI_TRANSITIONS=353} [2024-06-21 16:46:45,914 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 270 predicate places. [2024-06-21 16:46:45,915 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 353 transitions, 3554 flow [2024-06-21 16:46:45,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:45,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:45,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:45,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:46:45,915 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)] === [2024-06-21 16:46:45,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:45,915 INFO L85 PathProgramCache]: Analyzing trace with hash 420909047, now seen corresponding path program 2 times [2024-06-21 16:46:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:45,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975136030] [2024-06-21 16:46:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:45,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:46,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975136030] [2024-06-21 16:46:46,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975136030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:46,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806238818] [2024-06-21 16:46:46,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:46,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:46,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:46,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 353 transitions, 3554 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:46,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:46,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:46,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:48,337 INFO L124 PetriNetUnfolderBase]: 3763/6199 cut-off events. [2024-06-21 16:46:48,337 INFO L125 PetriNetUnfolderBase]: For 1650740/1650740 co-relation queries the response was YES. [2024-06-21 16:46:48,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64701 conditions, 6199 events. 3763/6199 cut-off events. For 1650740/1650740 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40148 event pairs, 892 based on Foata normal form. 1/6117 useless extension candidates. Maximal degree in co-relation 64548. Up to 5598 conditions per place. [2024-06-21 16:46:48,415 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 314 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-06-21 16:46:48,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 386 transitions, 4418 flow [2024-06-21 16:46:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:46:48,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 16:46:48,416 INFO L175 Difference]: Start difference. First operand has 315 places, 353 transitions, 3554 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:46:48,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 386 transitions, 4418 flow [2024-06-21 16:46:50,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 386 transitions, 4300 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:50,960 INFO L231 Difference]: Finished difference. Result has 319 places, 359 transitions, 3630 flow [2024-06-21 16:46:50,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3630, PETRI_PLACES=319, PETRI_TRANSITIONS=359} [2024-06-21 16:46:50,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-21 16:46:50,961 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 359 transitions, 3630 flow [2024-06-21 16:46:50,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:50,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:50,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:50,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:46:50,961 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:50,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash 997317829, now seen corresponding path program 1 times [2024-06-21 16:46:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:50,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588632916] [2024-06-21 16:46:50,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:51,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:51,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588632916] [2024-06-21 16:46:51,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588632916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:51,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:51,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338735059] [2024-06-21 16:46:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:51,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:51,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:51,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:51,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 359 transitions, 3630 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:51,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:51,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:51,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:53,341 INFO L124 PetriNetUnfolderBase]: 3771/6211 cut-off events. [2024-06-21 16:46:53,341 INFO L125 PetriNetUnfolderBase]: For 1688696/1688696 co-relation queries the response was YES. [2024-06-21 16:46:53,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65455 conditions, 6211 events. 3771/6211 cut-off events. For 1688696/1688696 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40154 event pairs, 733 based on Foata normal form. 2/6160 useless extension candidates. Maximal degree in co-relation 65300. Up to 5590 conditions per place. [2024-06-21 16:46:53,415 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 325 selfloop transitions, 15 changer transitions 0/389 dead transitions. [2024-06-21 16:46:53,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 389 transitions, 4444 flow [2024-06-21 16:46:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:46:53,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 16:46:53,416 INFO L175 Difference]: Start difference. First operand has 319 places, 359 transitions, 3630 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:46:53,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 389 transitions, 4444 flow [2024-06-21 16:46:56,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 389 transitions, 4312 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:56,610 INFO L231 Difference]: Finished difference. Result has 321 places, 361 transitions, 3601 flow [2024-06-21 16:46:56,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3601, PETRI_PLACES=321, PETRI_TRANSITIONS=361} [2024-06-21 16:46:56,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-21 16:46:56,610 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 361 transitions, 3601 flow [2024-06-21 16:46:56,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:56,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:56,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:56,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:46:56,611 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:56,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 420906071, now seen corresponding path program 2 times [2024-06-21 16:46:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104434925] [2024-06-21 16:46:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104434925] [2024-06-21 16:46:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104434925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:57,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667335938] [2024-06-21 16:46:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:57,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:57,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:57,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 361 transitions, 3601 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:46:57,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:57,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:57,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:59,104 INFO L124 PetriNetUnfolderBase]: 3779/6223 cut-off events. [2024-06-21 16:46:59,104 INFO L125 PetriNetUnfolderBase]: For 1715140/1715140 co-relation queries the response was YES. [2024-06-21 16:46:59,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65904 conditions, 6223 events. 3779/6223 cut-off events. For 1715140/1715140 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40337 event pairs, 890 based on Foata normal form. 2/6142 useless extension candidates. Maximal degree in co-relation 65748. Up to 5631 conditions per place. [2024-06-21 16:46:59,186 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 322 selfloop transitions, 16 changer transitions 0/387 dead transitions. [2024-06-21 16:46:59,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 387 transitions, 4405 flow [2024-06-21 16:46:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:59,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:46:59,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:46:59,188 INFO L175 Difference]: Start difference. First operand has 321 places, 361 transitions, 3601 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:46:59,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 387 transitions, 4405 flow [2024-06-21 16:47:02,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 387 transitions, 4318 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:02,394 INFO L231 Difference]: Finished difference. Result has 323 places, 363 transitions, 3623 flow [2024-06-21 16:47:02,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3623, PETRI_PLACES=323, PETRI_TRANSITIONS=363} [2024-06-21 16:47:02,394 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-21 16:47:02,395 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 363 transitions, 3623 flow [2024-06-21 16:47:02,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:02,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:02,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:02,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:47:02,395 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:02,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:02,396 INFO L85 PathProgramCache]: Analyzing trace with hash 528581657, now seen corresponding path program 3 times [2024-06-21 16:47:02,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:02,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790459645] [2024-06-21 16:47:02,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:02,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:03,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:03,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790459645] [2024-06-21 16:47:03,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790459645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:03,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:03,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:03,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985913810] [2024-06-21 16:47:03,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:03,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:03,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:03,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:47:03,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 363 transitions, 3623 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:03,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:03,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:47:03,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:04,812 INFO L124 PetriNetUnfolderBase]: 3784/6233 cut-off events. [2024-06-21 16:47:04,813 INFO L125 PetriNetUnfolderBase]: For 1738169/1738172 co-relation queries the response was YES. [2024-06-21 16:47:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66298 conditions, 6233 events. 3784/6233 cut-off events. For 1738169/1738172 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40477 event pairs, 894 based on Foata normal form. 3/6152 useless extension candidates. Maximal degree in co-relation 66141. Up to 5590 conditions per place. [2024-06-21 16:47:04,896 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 311 selfloop transitions, 29 changer transitions 0/389 dead transitions. [2024-06-21 16:47:04,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 389 transitions, 4471 flow [2024-06-21 16:47:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:47:04,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 16:47:04,897 INFO L175 Difference]: Start difference. First operand has 323 places, 363 transitions, 3623 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:47:04,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 389 transitions, 4471 flow [2024-06-21 16:47:07,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 389 transitions, 4374 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:07,908 INFO L231 Difference]: Finished difference. Result has 325 places, 366 transitions, 3706 flow [2024-06-21 16:47:07,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3526, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3706, PETRI_PLACES=325, PETRI_TRANSITIONS=366} [2024-06-21 16:47:07,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-21 16:47:07,908 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 366 transitions, 3706 flow [2024-06-21 16:47:07,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:07,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:07,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:07,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:47:07,909 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:07,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:07,909 INFO L85 PathProgramCache]: Analyzing trace with hash 528760403, now seen corresponding path program 1 times [2024-06-21 16:47:07,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:07,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119294513] [2024-06-21 16:47:07,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:07,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:08,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:08,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119294513] [2024-06-21 16:47:08,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119294513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:08,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22137819] [2024-06-21 16:47:08,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:08,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:08,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:08,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:08,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:08,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 366 transitions, 3706 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:08,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:08,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:08,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:10,200 INFO L124 PetriNetUnfolderBase]: 4012/6523 cut-off events. [2024-06-21 16:47:10,200 INFO L125 PetriNetUnfolderBase]: For 1773535/1773538 co-relation queries the response was YES. [2024-06-21 16:47:10,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68600 conditions, 6523 events. 4012/6523 cut-off events. For 1773535/1773538 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41473 event pairs, 947 based on Foata normal form. 1/6512 useless extension candidates. Maximal degree in co-relation 68442. Up to 6043 conditions per place. [2024-06-21 16:47:10,284 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 29 changer transitions 0/392 dead transitions. [2024-06-21 16:47:10,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 392 transitions, 4608 flow [2024-06-21 16:47:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:47:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:47:10,285 INFO L175 Difference]: Start difference. First operand has 325 places, 366 transitions, 3706 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:47:10,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 392 transitions, 4608 flow [2024-06-21 16:47:12,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 392 transitions, 4450 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:12,520 INFO L231 Difference]: Finished difference. Result has 327 places, 369 transitions, 3716 flow [2024-06-21 16:47:12,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3548, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3716, PETRI_PLACES=327, PETRI_TRANSITIONS=369} [2024-06-21 16:47:12,520 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 282 predicate places. [2024-06-21 16:47:12,520 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 369 transitions, 3716 flow [2024-06-21 16:47:12,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:12,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:12,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:12,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:47:12,521 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)] === [2024-06-21 16:47:12,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:12,521 INFO L85 PathProgramCache]: Analyzing trace with hash 528940141, now seen corresponding path program 1 times [2024-06-21 16:47:12,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:12,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563858563] [2024-06-21 16:47:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:12,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:12,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:13,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:13,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563858563] [2024-06-21 16:47:13,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563858563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:13,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:13,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657399230] [2024-06-21 16:47:13,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:13,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:13,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:13,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:13,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:13,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 369 transitions, 3716 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:13,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:13,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:13,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:14,980 INFO L124 PetriNetUnfolderBase]: 3897/6354 cut-off events. [2024-06-21 16:47:14,981 INFO L125 PetriNetUnfolderBase]: For 1792438/1792441 co-relation queries the response was YES. [2024-06-21 16:47:15,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68126 conditions, 6354 events. 3897/6354 cut-off events. For 1792438/1792441 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40719 event pairs, 930 based on Foata normal form. 3/6281 useless extension candidates. Maximal degree in co-relation 67967. Up to 5866 conditions per place. [2024-06-21 16:47:15,056 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 334 selfloop transitions, 22 changer transitions 0/392 dead transitions. [2024-06-21 16:47:15,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 392 transitions, 4560 flow [2024-06-21 16:47:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:47:15,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:47:15,057 INFO L175 Difference]: Start difference. First operand has 327 places, 369 transitions, 3716 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:47:15,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 392 transitions, 4560 flow [2024-06-21 16:47:17,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 392 transitions, 4414 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:17,521 INFO L231 Difference]: Finished difference. Result has 329 places, 372 transitions, 3708 flow [2024-06-21 16:47:17,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3570, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3708, PETRI_PLACES=329, PETRI_TRANSITIONS=372} [2024-06-21 16:47:17,522 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-21 16:47:17,522 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 372 transitions, 3708 flow [2024-06-21 16:47:17,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:17,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:17,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:17,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:47:17,522 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)] === [2024-06-21 16:47:17,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:17,522 INFO L85 PathProgramCache]: Analyzing trace with hash 528939893, now seen corresponding path program 2 times [2024-06-21 16:47:17,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:17,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989317552] [2024-06-21 16:47:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:18,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:18,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989317552] [2024-06-21 16:47:18,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989317552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:18,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:18,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:18,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330608266] [2024-06-21 16:47:18,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:18,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:18,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:18,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:18,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:18,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 372 transitions, 3708 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:18,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:18,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:19,867 INFO L124 PetriNetUnfolderBase]: 4034/6549 cut-off events. [2024-06-21 16:47:19,867 INFO L125 PetriNetUnfolderBase]: For 1832151/1832154 co-relation queries the response was YES. [2024-06-21 16:47:19,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69861 conditions, 6549 events. 4034/6549 cut-off events. For 1832151/1832154 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41591 event pairs, 946 based on Foata normal form. 1/6538 useless extension candidates. Maximal degree in co-relation 69701. Up to 6061 conditions per place. [2024-06-21 16:47:19,952 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 34 changer transitions 0/395 dead transitions. [2024-06-21 16:47:19,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 395 transitions, 4614 flow [2024-06-21 16:47:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:47:19,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:47:19,953 INFO L175 Difference]: Start difference. First operand has 329 places, 372 transitions, 3708 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:47:19,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 395 transitions, 4614 flow [2024-06-21 16:47:22,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 395 transitions, 4498 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:22,804 INFO L231 Difference]: Finished difference. Result has 331 places, 375 transitions, 3778 flow [2024-06-21 16:47:22,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3778, PETRI_PLACES=331, PETRI_TRANSITIONS=375} [2024-06-21 16:47:22,804 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 286 predicate places. [2024-06-21 16:47:22,804 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 375 transitions, 3778 flow [2024-06-21 16:47:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:22,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:22,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:22,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:47:22,805 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)] === [2024-06-21 16:47:22,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 773240095, now seen corresponding path program 4 times [2024-06-21 16:47:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:22,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141903736] [2024-06-21 16:47:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:22,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141903736] [2024-06-21 16:47:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141903736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:23,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:23,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:23,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489842321] [2024-06-21 16:47:23,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:23,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:47:23,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 375 transitions, 3778 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:23,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:23,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:47:23,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:25,160 INFO L124 PetriNetUnfolderBase]: 3816/6275 cut-off events. [2024-06-21 16:47:25,160 INFO L125 PetriNetUnfolderBase]: For 1855509/1855512 co-relation queries the response was YES. [2024-06-21 16:47:25,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68806 conditions, 6275 events. 3816/6275 cut-off events. For 1855509/1855512 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40649 event pairs, 892 based on Foata normal form. 3/6194 useless extension candidates. Maximal degree in co-relation 68645. Up to 5615 conditions per place. [2024-06-21 16:47:25,243 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 37 changer transitions 0/398 dead transitions. [2024-06-21 16:47:25,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 398 transitions, 4642 flow [2024-06-21 16:47:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:47:25,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:47:25,244 INFO L175 Difference]: Start difference. First operand has 331 places, 375 transitions, 3778 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:47:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 398 transitions, 4642 flow [2024-06-21 16:47:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 398 transitions, 4478 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:27,952 INFO L231 Difference]: Finished difference. Result has 333 places, 378 transitions, 3822 flow [2024-06-21 16:47:27,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3822, PETRI_PLACES=333, PETRI_TRANSITIONS=378} [2024-06-21 16:47:27,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-21 16:47:27,953 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 378 transitions, 3822 flow [2024-06-21 16:47:27,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:27,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:27,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:27,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:47:27,953 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:27,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1344986483, now seen corresponding path program 2 times [2024-06-21 16:47:27,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:27,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170366024] [2024-06-21 16:47:27,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:27,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:28,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170366024] [2024-06-21 16:47:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170366024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:28,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876323128] [2024-06-21 16:47:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:29,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:29,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 378 transitions, 3822 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:29,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:29,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:30,315 INFO L124 PetriNetUnfolderBase]: 3920/6390 cut-off events. [2024-06-21 16:47:30,316 INFO L125 PetriNetUnfolderBase]: For 1891713/1891716 co-relation queries the response was YES. [2024-06-21 16:47:30,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70253 conditions, 6390 events. 3920/6390 cut-off events. For 1891713/1891716 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40957 event pairs, 930 based on Foata normal form. 3/6317 useless extension candidates. Maximal degree in co-relation 70091. Up to 5875 conditions per place. [2024-06-21 16:47:30,398 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 330 selfloop transitions, 37 changer transitions 0/404 dead transitions. [2024-06-21 16:47:30,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 404 transitions, 5047 flow [2024-06-21 16:47:30,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:30,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:47:30,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:47:30,399 INFO L175 Difference]: Start difference. First operand has 333 places, 378 transitions, 3822 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:47:30,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 404 transitions, 5047 flow [2024-06-21 16:47:33,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 404 transitions, 4861 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:33,664 INFO L231 Difference]: Finished difference. Result has 336 places, 386 transitions, 3935 flow [2024-06-21 16:47:33,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=336, PETRI_TRANSITIONS=386} [2024-06-21 16:47:33,664 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-21 16:47:33,665 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 386 transitions, 3935 flow [2024-06-21 16:47:33,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:33,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:33,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:33,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:47:33,665 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:33,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:33,666 INFO L85 PathProgramCache]: Analyzing trace with hash 765115253, now seen corresponding path program 3 times [2024-06-21 16:47:33,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:33,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376566542] [2024-06-21 16:47:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:33,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:34,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:34,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376566542] [2024-06-21 16:47:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376566542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:34,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:34,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:34,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233155730] [2024-06-21 16:47:34,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:34,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:34,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 386 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:34,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:34,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:34,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:36,195 INFO L124 PetriNetUnfolderBase]: 4067/6596 cut-off events. [2024-06-21 16:47:36,195 INFO L125 PetriNetUnfolderBase]: For 1949529/1949535 co-relation queries the response was YES. [2024-06-21 16:47:36,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72398 conditions, 6596 events. 4067/6596 cut-off events. For 1949529/1949535 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 41904 event pairs, 946 based on Foata normal form. 4/6592 useless extension candidates. Maximal degree in co-relation 72234. Up to 6081 conditions per place. [2024-06-21 16:47:36,284 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 46 changer transitions 0/410 dead transitions. [2024-06-21 16:47:36,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 410 transitions, 5237 flow [2024-06-21 16:47:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:47:36,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:47:36,285 INFO L175 Difference]: Start difference. First operand has 336 places, 386 transitions, 3935 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:47:36,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 410 transitions, 5237 flow [2024-06-21 16:47:39,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 410 transitions, 5093 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:39,067 INFO L231 Difference]: Finished difference. Result has 340 places, 392 transitions, 4127 flow [2024-06-21 16:47:39,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4127, PETRI_PLACES=340, PETRI_TRANSITIONS=392} [2024-06-21 16:47:39,067 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-21 16:47:39,068 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 392 transitions, 4127 flow [2024-06-21 16:47:39,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:39,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:39,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:39,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:47:39,068 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:39,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:39,069 INFO L85 PathProgramCache]: Analyzing trace with hash 765115067, now seen corresponding path program 5 times [2024-06-21 16:47:39,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829897370] [2024-06-21 16:47:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:40,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:40,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829897370] [2024-06-21 16:47:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829897370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:40,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:40,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:40,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488620989] [2024-06-21 16:47:40,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:40,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:40,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:40,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:47:40,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 392 transitions, 4127 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:40,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:40,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:47:40,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:41,640 INFO L124 PetriNetUnfolderBase]: 3865/6344 cut-off events. [2024-06-21 16:47:41,640 INFO L125 PetriNetUnfolderBase]: For 1993603/1993609 co-relation queries the response was YES. [2024-06-21 16:47:41,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71994 conditions, 6344 events. 3865/6344 cut-off events. For 1993603/1993609 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41098 event pairs, 892 based on Foata normal form. 6/6270 useless extension candidates. Maximal degree in co-relation 71828. Up to 5641 conditions per place. [2024-06-21 16:47:41,716 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 304 selfloop transitions, 59 changer transitions 0/420 dead transitions. [2024-06-21 16:47:41,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 420 transitions, 5803 flow [2024-06-21 16:47:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 16:47:41,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:47:41,717 INFO L175 Difference]: Start difference. First operand has 340 places, 392 transitions, 4127 flow. Second operand 8 states and 164 transitions. [2024-06-21 16:47:41,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 420 transitions, 5803 flow [2024-06-21 16:47:44,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 420 transitions, 5643 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:44,565 INFO L231 Difference]: Finished difference. Result has 344 places, 401 transitions, 4493 flow [2024-06-21 16:47:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4493, PETRI_PLACES=344, PETRI_TRANSITIONS=401} [2024-06-21 16:47:44,565 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-21 16:47:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 401 transitions, 4493 flow [2024-06-21 16:47:44,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:44,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:47:44,566 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1009415889, now seen corresponding path program 3 times [2024-06-21 16:47:44,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:44,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752236647] [2024-06-21 16:47:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:44,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:45,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:45,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752236647] [2024-06-21 16:47:45,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752236647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:45,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:45,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:45,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639193257] [2024-06-21 16:47:45,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:45,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:45,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:45,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:45,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:45,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:45,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 401 transitions, 4493 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:45,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:45,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:45,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:47,017 INFO L124 PetriNetUnfolderBase]: 3959/6446 cut-off events. [2024-06-21 16:47:47,018 INFO L125 PetriNetUnfolderBase]: For 2019371/2019374 co-relation queries the response was YES. [2024-06-21 16:47:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73234 conditions, 6446 events. 3959/6446 cut-off events. For 2019371/2019374 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41368 event pairs, 930 based on Foata normal form. 3/6373 useless extension candidates. Maximal degree in co-relation 73066. Up to 5923 conditions per place. [2024-06-21 16:47:47,108 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 345 selfloop transitions, 38 changer transitions 0/422 dead transitions. [2024-06-21 16:47:47,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 422 transitions, 5634 flow [2024-06-21 16:47:47,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:47,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:47:47,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:47:47,109 INFO L175 Difference]: Start difference. First operand has 344 places, 401 transitions, 4493 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:47:47,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 422 transitions, 5634 flow [2024-06-21 16:47:50,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 422 transitions, 5446 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-21 16:47:50,405 INFO L231 Difference]: Finished difference. Result has 349 places, 404 transitions, 4462 flow [2024-06-21 16:47:50,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4462, PETRI_PLACES=349, PETRI_TRANSITIONS=404} [2024-06-21 16:47:50,405 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-21 16:47:50,405 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 404 transitions, 4462 flow [2024-06-21 16:47:50,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:50,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:50,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:50,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:47:50,406 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:50,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash 765110417, now seen corresponding path program 6 times [2024-06-21 16:47:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:50,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689183980] [2024-06-21 16:47:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:50,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:51,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:51,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689183980] [2024-06-21 16:47:51,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689183980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:51,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:51,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786129433] [2024-06-21 16:47:51,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:51,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:51,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:51,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:47:51,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 404 transitions, 4462 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:51,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:51,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:47:51,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:53,015 INFO L124 PetriNetUnfolderBase]: 3867/6346 cut-off events. [2024-06-21 16:47:53,015 INFO L125 PetriNetUnfolderBase]: For 2049054/2049057 co-relation queries the response was YES. [2024-06-21 16:47:53,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72717 conditions, 6346 events. 3867/6346 cut-off events. For 2049054/2049057 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41103 event pairs, 888 based on Foata normal form. 4/6271 useless extension candidates. Maximal degree in co-relation 72547. Up to 5727 conditions per place. [2024-06-21 16:47:53,103 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 22 changer transitions 0/421 dead transitions. [2024-06-21 16:47:53,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 421 transitions, 5230 flow [2024-06-21 16:47:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:53,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:47:53,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:47:53,104 INFO L175 Difference]: Start difference. First operand has 349 places, 404 transitions, 4462 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:47:53,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 421 transitions, 5230 flow [2024-06-21 16:47:56,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 421 transitions, 5023 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:56,160 INFO L231 Difference]: Finished difference. Result has 352 places, 404 transitions, 4305 flow [2024-06-21 16:47:56,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4255, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4305, PETRI_PLACES=352, PETRI_TRANSITIONS=404} [2024-06-21 16:47:56,161 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-21 16:47:56,161 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 404 transitions, 4305 flow [2024-06-21 16:47:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:47:56,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:56,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:56,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:47:56,161 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)] === [2024-06-21 16:47:56,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 585076184, now seen corresponding path program 1 times [2024-06-21 16:47:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195431086] [2024-06-21 16:47:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:57,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195431086] [2024-06-21 16:47:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195431086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:57,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:57,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:47:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867510414] [2024-06-21 16:47:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:57,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:47:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:47:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:47:57,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:57,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 404 transitions, 4305 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:57,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:57,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:57,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:59,721 INFO L124 PetriNetUnfolderBase]: 4295/7025 cut-off events. [2024-06-21 16:47:59,722 INFO L125 PetriNetUnfolderBase]: For 2157057/2157063 co-relation queries the response was YES. [2024-06-21 16:47:59,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76860 conditions, 7025 events. 4295/7025 cut-off events. For 2157057/2157063 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45703 event pairs, 921 based on Foata normal form. 15/7032 useless extension candidates. Maximal degree in co-relation 76689. Up to 5640 conditions per place. [2024-06-21 16:47:59,818 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 331 selfloop transitions, 109 changer transitions 0/464 dead transitions. [2024-06-21 16:47:59,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 464 transitions, 5629 flow [2024-06-21 16:47:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:47:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:47:59,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-21 16:47:59,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-06-21 16:47:59,820 INFO L175 Difference]: Start difference. First operand has 352 places, 404 transitions, 4305 flow. Second operand 11 states and 230 transitions. [2024-06-21 16:47:59,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 464 transitions, 5629 flow [2024-06-21 16:48:03,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 464 transitions, 5531 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:48:03,329 INFO L231 Difference]: Finished difference. Result has 357 places, 418 transitions, 4715 flow [2024-06-21 16:48:03,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4715, PETRI_PLACES=357, PETRI_TRANSITIONS=418} [2024-06-21 16:48:03,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 16:48:03,329 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 418 transitions, 4715 flow [2024-06-21 16:48:03,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:03,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:03,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:03,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:48:03,330 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)] === [2024-06-21 16:48:03,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 764992121, now seen corresponding path program 3 times [2024-06-21 16:48:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270307369] [2024-06-21 16:48:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:04,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270307369] [2024-06-21 16:48:04,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270307369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:04,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:04,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148030454] [2024-06-21 16:48:04,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:04,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:04,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:04,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:48:04,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 418 transitions, 4715 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:04,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:04,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:48:04,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:05,976 INFO L124 PetriNetUnfolderBase]: 4080/6773 cut-off events. [2024-06-21 16:48:05,976 INFO L125 PetriNetUnfolderBase]: For 2136114/2136117 co-relation queries the response was YES. [2024-06-21 16:48:06,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76490 conditions, 6773 events. 4080/6773 cut-off events. For 2136114/2136117 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45049 event pairs, 914 based on Foata normal form. 5/6699 useless extension candidates. Maximal degree in co-relation 76318. Up to 6091 conditions per place. [2024-06-21 16:48:06,072 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 359 selfloop transitions, 21 changer transitions 0/438 dead transitions. [2024-06-21 16:48:06,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 438 transitions, 5603 flow [2024-06-21 16:48:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:06,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:48:06,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:48:06,073 INFO L175 Difference]: Start difference. First operand has 357 places, 418 transitions, 4715 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:48:06,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 438 transitions, 5603 flow [2024-06-21 16:48:09,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 438 transitions, 5365 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:10,000 INFO L231 Difference]: Finished difference. Result has 359 places, 420 transitions, 4612 flow [2024-06-21 16:48:10,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4612, PETRI_PLACES=359, PETRI_TRANSITIONS=420} [2024-06-21 16:48:10,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-21 16:48:10,000 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 420 transitions, 4612 flow [2024-06-21 16:48:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:10,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:10,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:10,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:48:10,001 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)] === [2024-06-21 16:48:10,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:10,001 INFO L85 PathProgramCache]: Analyzing trace with hash 765423083, now seen corresponding path program 1 times [2024-06-21 16:48:10,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:10,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638144136] [2024-06-21 16:48:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:11,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:11,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:11,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638144136] [2024-06-21 16:48:11,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638144136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:11,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:11,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:11,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834169348] [2024-06-21 16:48:11,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:11,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:11,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:11,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:11,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:11,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:48:11,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 420 transitions, 4612 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:11,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:11,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:48:11,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:12,708 INFO L124 PetriNetUnfolderBase]: 3999/6675 cut-off events. [2024-06-21 16:48:12,708 INFO L125 PetriNetUnfolderBase]: For 2145142/2145172 co-relation queries the response was YES. [2024-06-21 16:48:12,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75122 conditions, 6675 events. 3999/6675 cut-off events. For 2145142/2145172 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 44665 event pairs, 935 based on Foata normal form. 5/6588 useless extension candidates. Maximal degree in co-relation 74949. Up to 5892 conditions per place. [2024-06-21 16:48:12,801 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 335 selfloop transitions, 29 changer transitions 0/441 dead transitions. [2024-06-21 16:48:12,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 441 transitions, 5464 flow [2024-06-21 16:48:12,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:12,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:48:12,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-21 16:48:12,802 INFO L175 Difference]: Start difference. First operand has 359 places, 420 transitions, 4612 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:48:12,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 441 transitions, 5464 flow [2024-06-21 16:48:16,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 441 transitions, 5345 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:16,310 INFO L231 Difference]: Finished difference. Result has 362 places, 423 transitions, 4643 flow [2024-06-21 16:48:16,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4493, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4643, PETRI_PLACES=362, PETRI_TRANSITIONS=423} [2024-06-21 16:48:16,310 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-21 16:48:16,311 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 423 transitions, 4643 flow [2024-06-21 16:48:16,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:16,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:16,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:16,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:48:16,311 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)] === [2024-06-21 16:48:16,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1046719463, now seen corresponding path program 7 times [2024-06-21 16:48:16,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:16,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517915721] [2024-06-21 16:48:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:17,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517915721] [2024-06-21 16:48:17,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517915721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:17,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:17,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:17,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188431528] [2024-06-21 16:48:17,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:17,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:17,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:17,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:17,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:48:17,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 423 transitions, 4643 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:17,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:17,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:48:17,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:18,880 INFO L124 PetriNetUnfolderBase]: 4105/6807 cut-off events. [2024-06-21 16:48:18,880 INFO L125 PetriNetUnfolderBase]: For 2167451/2167457 co-relation queries the response was YES. [2024-06-21 16:48:18,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77160 conditions, 6807 events. 4105/6807 cut-off events. For 2167451/2167457 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45175 event pairs, 929 based on Foata normal form. 4/6728 useless extension candidates. Maximal degree in co-relation 76986. Up to 6070 conditions per place. [2024-06-21 16:48:18,964 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 29 changer transitions 0/446 dead transitions. [2024-06-21 16:48:18,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 446 transitions, 5591 flow [2024-06-21 16:48:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:48:18,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 16:48:18,965 INFO L175 Difference]: Start difference. First operand has 362 places, 423 transitions, 4643 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:48:18,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 446 transitions, 5591 flow [2024-06-21 16:48:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 446 transitions, 5463 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:22,553 INFO L231 Difference]: Finished difference. Result has 363 places, 426 transitions, 4707 flow [2024-06-21 16:48:22,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4515, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4707, PETRI_PLACES=363, PETRI_TRANSITIONS=426} [2024-06-21 16:48:22,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 318 predicate places. [2024-06-21 16:48:22,554 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 426 transitions, 4707 flow [2024-06-21 16:48:22,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:22,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:22,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:22,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:48:22,554 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)] === [2024-06-21 16:48:22,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:22,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1712852569, now seen corresponding path program 4 times [2024-06-21 16:48:22,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:22,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620029366] [2024-06-21 16:48:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:22,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:23,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620029366] [2024-06-21 16:48:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620029366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:23,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:23,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789280945] [2024-06-21 16:48:23,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:23,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:23,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:23,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:23,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 426 transitions, 4707 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:23,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:23,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:23,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:25,275 INFO L124 PetriNetUnfolderBase]: 4323/7080 cut-off events. [2024-06-21 16:48:25,275 INFO L125 PetriNetUnfolderBase]: For 2205326/2205335 co-relation queries the response was YES. [2024-06-21 16:48:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79009 conditions, 7080 events. 4323/7080 cut-off events. For 2205326/2205335 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46073 event pairs, 972 based on Foata normal form. 8/7079 useless extension candidates. Maximal degree in co-relation 78834. Up to 6532 conditions per place. [2024-06-21 16:48:25,360 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 396 selfloop transitions, 29 changer transitions 0/449 dead transitions. [2024-06-21 16:48:25,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 449 transitions, 5711 flow [2024-06-21 16:48:25,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:25,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:48:25,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:48:25,361 INFO L175 Difference]: Start difference. First operand has 363 places, 426 transitions, 4707 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:48:25,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 449 transitions, 5711 flow [2024-06-21 16:48:29,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 449 transitions, 5547 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:29,666 INFO L231 Difference]: Finished difference. Result has 365 places, 429 transitions, 4717 flow [2024-06-21 16:48:29,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4543, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4717, PETRI_PLACES=365, PETRI_TRANSITIONS=429} [2024-06-21 16:48:29,666 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-21 16:48:29,666 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 429 transitions, 4717 flow [2024-06-21 16:48:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:29,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:29,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:29,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:48:29,667 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)] === [2024-06-21 16:48:29,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2083407947, now seen corresponding path program 8 times [2024-06-21 16:48:29,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:29,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582243809] [2024-06-21 16:48:29,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:29,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:30,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:30,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582243809] [2024-06-21 16:48:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582243809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:30,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:30,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:30,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537990086] [2024-06-21 16:48:30,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:30,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:48:30,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 429 transitions, 4717 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:30,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:30,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:48:30,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:32,246 INFO L124 PetriNetUnfolderBase]: 4107/6800 cut-off events. [2024-06-21 16:48:32,246 INFO L125 PetriNetUnfolderBase]: For 2219989/2219995 co-relation queries the response was YES. [2024-06-21 16:48:32,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77361 conditions, 6800 events. 4107/6800 cut-off events. For 2219989/2219995 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45043 event pairs, 929 based on Foata normal form. 4/6721 useless extension candidates. Maximal degree in co-relation 77185. Up to 6065 conditions per place. [2024-06-21 16:48:32,346 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 353 selfloop transitions, 34 changer transitions 0/446 dead transitions. [2024-06-21 16:48:32,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 446 transitions, 5533 flow [2024-06-21 16:48:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:48:32,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:48:32,347 INFO L175 Difference]: Start difference. First operand has 365 places, 429 transitions, 4717 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:48:32,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 446 transitions, 5533 flow [2024-06-21 16:48:36,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 446 transitions, 5315 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:36,778 INFO L231 Difference]: Finished difference. Result has 367 places, 429 transitions, 4573 flow [2024-06-21 16:48:36,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4499, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4573, PETRI_PLACES=367, PETRI_TRANSITIONS=429} [2024-06-21 16:48:36,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 322 predicate places. [2024-06-21 16:48:36,779 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 429 transitions, 4573 flow [2024-06-21 16:48:36,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:48:36,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:36,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:48:36,780 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)] === [2024-06-21 16:48:36,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:36,781 INFO L85 PathProgramCache]: Analyzing trace with hash -157447787, now seen corresponding path program 5 times [2024-06-21 16:48:36,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:36,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621821576] [2024-06-21 16:48:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:37,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:37,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621821576] [2024-06-21 16:48:37,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621821576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:37,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:37,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195293472] [2024-06-21 16:48:37,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:37,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:37,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 429 transitions, 4573 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:37,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:37,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:37,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:39,389 INFO L124 PetriNetUnfolderBase]: 4325/7083 cut-off events. [2024-06-21 16:48:39,389 INFO L125 PetriNetUnfolderBase]: For 2256605/2256614 co-relation queries the response was YES. [2024-06-21 16:48:39,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79152 conditions, 7083 events. 4325/7083 cut-off events. For 2256605/2256614 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46141 event pairs, 972 based on Foata normal form. 8/7082 useless extension candidates. Maximal degree in co-relation 78975. Up to 6525 conditions per place. [2024-06-21 16:48:39,490 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 37 changer transitions 0/450 dead transitions. [2024-06-21 16:48:39,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 450 transitions, 5851 flow [2024-06-21 16:48:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:48:39,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:48:39,491 INFO L175 Difference]: Start difference. First operand has 367 places, 429 transitions, 4573 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:48:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 450 transitions, 5851 flow [2024-06-21 16:48:44,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 450 transitions, 5709 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:44,065 INFO L231 Difference]: Finished difference. Result has 368 places, 432 transitions, 4621 flow [2024-06-21 16:48:44,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4621, PETRI_PLACES=368, PETRI_TRANSITIONS=432} [2024-06-21 16:48:44,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-21 16:48:44,066 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 432 transitions, 4621 flow [2024-06-21 16:48:44,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:44,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:44,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:44,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:48:44,067 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)] === [2024-06-21 16:48:44,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -186970699, now seen corresponding path program 6 times [2024-06-21 16:48:44,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:44,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827099199] [2024-06-21 16:48:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:44,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827099199] [2024-06-21 16:48:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827099199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:44,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68554573] [2024-06-21 16:48:44,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:44,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:44,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 432 transitions, 4621 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:44,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:44,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:44,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:46,681 INFO L124 PetriNetUnfolderBase]: 4322/7079 cut-off events. [2024-06-21 16:48:46,681 INFO L125 PetriNetUnfolderBase]: For 2278612/2278621 co-relation queries the response was YES. [2024-06-21 16:48:46,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79146 conditions, 7079 events. 4322/7079 cut-off events. For 2278612/2278621 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46081 event pairs, 972 based on Foata normal form. 8/7078 useless extension candidates. Maximal degree in co-relation 78968. Up to 6531 conditions per place. [2024-06-21 16:48:46,776 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 398 selfloop transitions, 30 changer transitions 0/452 dead transitions. [2024-06-21 16:48:46,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 452 transitions, 5527 flow [2024-06-21 16:48:46,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:48:46,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:48:46,777 INFO L175 Difference]: Start difference. First operand has 368 places, 432 transitions, 4621 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:48:46,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 452 transitions, 5527 flow [2024-06-21 16:48:52,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 452 transitions, 5257 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:52,030 INFO L231 Difference]: Finished difference. Result has 370 places, 432 transitions, 4417 flow [2024-06-21 16:48:52,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=370, PETRI_TRANSITIONS=432} [2024-06-21 16:48:52,031 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-21 16:48:52,031 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 432 transitions, 4417 flow [2024-06-21 16:48:52,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:52,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:52,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:52,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:48:52,031 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)] === [2024-06-21 16:48:52,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:52,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1399055777, now seen corresponding path program 7 times [2024-06-21 16:48:52,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:52,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229588083] [2024-06-21 16:48:52,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:52,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:52,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:52,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229588083] [2024-06-21 16:48:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229588083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730434445] [2024-06-21 16:48:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:53,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:53,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 432 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:53,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:53,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:53,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:54,623 INFO L124 PetriNetUnfolderBase]: 4327/7086 cut-off events. [2024-06-21 16:48:54,623 INFO L125 PetriNetUnfolderBase]: For 2309199/2309208 co-relation queries the response was YES. [2024-06-21 16:48:54,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79324 conditions, 7086 events. 4327/7086 cut-off events. For 2309199/2309208 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46177 event pairs, 972 based on Foata normal form. 8/7085 useless extension candidates. Maximal degree in co-relation 79145. Up to 6526 conditions per place. [2024-06-21 16:48:54,715 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 387 selfloop transitions, 41 changer transitions 0/452 dead transitions. [2024-06-21 16:48:54,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 452 transitions, 5441 flow [2024-06-21 16:48:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:48:54,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:48:54,716 INFO L175 Difference]: Start difference. First operand has 370 places, 432 transitions, 4417 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:48:54,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 452 transitions, 5441 flow [2024-06-21 16:48:59,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 452 transitions, 5361 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:59,765 INFO L231 Difference]: Finished difference. Result has 371 places, 435 transitions, 4557 flow [2024-06-21 16:48:59,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4557, PETRI_PLACES=371, PETRI_TRANSITIONS=435} [2024-06-21 16:48:59,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-21 16:48:59,766 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 435 transitions, 4557 flow [2024-06-21 16:48:59,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:59,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:59,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:59,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:48:59,766 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)] === [2024-06-21 16:48:59,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1640109669, now seen corresponding path program 4 times [2024-06-21 16:48:59,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:59,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254658079] [2024-06-21 16:48:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:59,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:00,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:00,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254658079] [2024-06-21 16:49:00,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254658079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:00,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:00,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:00,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947950649] [2024-06-21 16:49:00,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:00,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:00,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:00,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:00,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:00,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 435 transitions, 4557 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:00,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:00,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:00,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:02,406 INFO L124 PetriNetUnfolderBase]: 4200/6912 cut-off events. [2024-06-21 16:49:02,406 INFO L125 PetriNetUnfolderBase]: For 2315191/2315197 co-relation queries the response was YES. [2024-06-21 16:49:02,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78588 conditions, 6912 events. 4200/6912 cut-off events. For 2315191/2315197 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45505 event pairs, 958 based on Foata normal form. 5/6840 useless extension candidates. Maximal degree in co-relation 78408. Up to 6333 conditions per place. [2024-06-21 16:49:02,497 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 389 selfloop transitions, 22 changer transitions 0/453 dead transitions. [2024-06-21 16:49:02,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 453 transitions, 5445 flow [2024-06-21 16:49:02,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:49:02,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-21 16:49:02,498 INFO L175 Difference]: Start difference. First operand has 371 places, 435 transitions, 4557 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:49:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 453 transitions, 5445 flow [2024-06-21 16:49:06,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 453 transitions, 5181 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:06,670 INFO L231 Difference]: Finished difference. Result has 373 places, 436 transitions, 4369 flow [2024-06-21 16:49:06,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4369, PETRI_PLACES=373, PETRI_TRANSITIONS=436} [2024-06-21 16:49:06,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-21 16:49:06,671 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 436 transitions, 4369 flow [2024-06-21 16:49:06,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:06,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:06,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:06,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:49:06,671 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)] === [2024-06-21 16:49:06,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:06,671 INFO L85 PathProgramCache]: Analyzing trace with hash -633054099, now seen corresponding path program 5 times [2024-06-21 16:49:06,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:06,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951687801] [2024-06-21 16:49:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:07,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:07,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951687801] [2024-06-21 16:49:07,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951687801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:07,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:07,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:07,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136864642] [2024-06-21 16:49:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:07,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:07,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 436 transitions, 4369 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:07,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:07,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:07,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:09,497 INFO L124 PetriNetUnfolderBase]: 4213/6920 cut-off events. [2024-06-21 16:49:09,497 INFO L125 PetriNetUnfolderBase]: For 2356383/2356389 co-relation queries the response was YES. [2024-06-21 16:49:09,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79000 conditions, 6920 events. 4213/6920 cut-off events. For 2356383/2356389 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45435 event pairs, 958 based on Foata normal form. 5/6848 useless extension candidates. Maximal degree in co-relation 78819. Up to 6329 conditions per place. [2024-06-21 16:49:09,588 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 376 selfloop transitions, 39 changer transitions 0/457 dead transitions. [2024-06-21 16:49:09,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 457 transitions, 5723 flow [2024-06-21 16:49:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:49:09,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:49:09,589 INFO L175 Difference]: Start difference. First operand has 373 places, 436 transitions, 4369 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:49:09,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 457 transitions, 5723 flow [2024-06-21 16:49:14,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 457 transitions, 5673 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:14,319 INFO L231 Difference]: Finished difference. Result has 375 places, 442 transitions, 4617 flow [2024-06-21 16:49:14,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4617, PETRI_PLACES=375, PETRI_TRANSITIONS=442} [2024-06-21 16:49:14,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-21 16:49:14,320 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 442 transitions, 4617 flow [2024-06-21 16:49:14,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:14,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:14,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:14,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:49:14,320 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)] === [2024-06-21 16:49:14,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:14,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1226803223, now seen corresponding path program 9 times [2024-06-21 16:49:14,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:14,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396300633] [2024-06-21 16:49:14,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396300633] [2024-06-21 16:49:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396300633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45582614] [2024-06-21 16:49:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:15,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:15,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:49:15,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 442 transitions, 4617 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:49:15,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:15,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:49:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:17,047 INFO L124 PetriNetUnfolderBase]: 4129/6833 cut-off events. [2024-06-21 16:49:17,048 INFO L125 PetriNetUnfolderBase]: For 2404524/2404530 co-relation queries the response was YES. [2024-06-21 16:49:17,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79247 conditions, 6833 events. 4129/6833 cut-off events. For 2404524/2404530 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45286 event pairs, 929 based on Foata normal form. 4/6754 useless extension candidates. Maximal degree in co-relation 79065. Up to 6068 conditions per place. [2024-06-21 16:49:17,131 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 344 selfloop transitions, 52 changer transitions 0/459 dead transitions. [2024-06-21 16:49:17,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 459 transitions, 5589 flow [2024-06-21 16:49:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:17,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:49:17,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:49:17,133 INFO L175 Difference]: Start difference. First operand has 375 places, 442 transitions, 4617 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:49:17,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 459 transitions, 5589 flow [2024-06-21 16:49:22,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 459 transitions, 5421 flow, removed 66 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:22,610 INFO L231 Difference]: Finished difference. Result has 379 places, 445 transitions, 4711 flow [2024-06-21 16:49:22,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=379, PETRI_TRANSITIONS=445} [2024-06-21 16:49:22,610 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 16:49:22,610 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 445 transitions, 4711 flow [2024-06-21 16:49:22,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:49:22,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:22,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:22,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:49:22,611 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)] === [2024-06-21 16:49:22,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash -632817197, now seen corresponding path program 8 times [2024-06-21 16:49:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:22,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84037255] [2024-06-21 16:49:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:23,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84037255] [2024-06-21 16:49:23,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84037255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:23,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:23,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183715082] [2024-06-21 16:49:23,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:23,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:23,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:23,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:23,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 445 transitions, 4711 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:23,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:23,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:23,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:25,500 INFO L124 PetriNetUnfolderBase]: 4355/7127 cut-off events. [2024-06-21 16:49:25,500 INFO L125 PetriNetUnfolderBase]: For 2459311/2459320 co-relation queries the response was YES. [2024-06-21 16:49:25,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82034 conditions, 7127 events. 4355/7127 cut-off events. For 2459311/2459320 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46441 event pairs, 972 based on Foata normal form. 8/7126 useless extension candidates. Maximal degree in co-relation 81850. Up to 6533 conditions per place. [2024-06-21 16:49:25,592 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 63 changer transitions 0/466 dead transitions. [2024-06-21 16:49:25,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 466 transitions, 6183 flow [2024-06-21 16:49:25,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:25,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:49:25,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:49:25,593 INFO L175 Difference]: Start difference. First operand has 379 places, 445 transitions, 4711 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:49:25,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 466 transitions, 6183 flow [2024-06-21 16:49:30,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 466 transitions, 5943 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:30,318 INFO L231 Difference]: Finished difference. Result has 381 places, 451 transitions, 4881 flow [2024-06-21 16:49:30,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4881, PETRI_PLACES=381, PETRI_TRANSITIONS=451} [2024-06-21 16:49:30,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-21 16:49:30,318 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 451 transitions, 4881 flow [2024-06-21 16:49:30,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:30,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:30,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:30,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:49:30,319 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:30,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash -633054347, now seen corresponding path program 9 times [2024-06-21 16:49:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:30,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846099236] [2024-06-21 16:49:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:30,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:31,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:31,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:31,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846099236] [2024-06-21 16:49:31,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846099236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:31,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:31,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:31,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372021051] [2024-06-21 16:49:31,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:31,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:31,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:31,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:31,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:31,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 451 transitions, 4881 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:31,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:31,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:31,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:33,167 INFO L124 PetriNetUnfolderBase]: 4352/7133 cut-off events. [2024-06-21 16:49:33,167 INFO L125 PetriNetUnfolderBase]: For 2485507/2485516 co-relation queries the response was YES. [2024-06-21 16:49:33,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82278 conditions, 7133 events. 4352/7133 cut-off events. For 2485507/2485516 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46595 event pairs, 972 based on Foata normal form. 8/7132 useless extension candidates. Maximal degree in co-relation 82093. Up to 6530 conditions per place. [2024-06-21 16:49:33,257 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 377 selfloop transitions, 62 changer transitions 0/465 dead transitions. [2024-06-21 16:49:33,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 465 transitions, 5793 flow [2024-06-21 16:49:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:33,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:33,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:49:33,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:49:33,258 INFO L175 Difference]: Start difference. First operand has 381 places, 451 transitions, 4881 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:49:33,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 465 transitions, 5793 flow [2024-06-21 16:49:38,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 465 transitions, 5493 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:38,471 INFO L231 Difference]: Finished difference. Result has 385 places, 451 transitions, 4711 flow [2024-06-21 16:49:38,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4711, PETRI_PLACES=385, PETRI_TRANSITIONS=451} [2024-06-21 16:49:38,471 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-21 16:49:38,471 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 451 transitions, 4711 flow [2024-06-21 16:49:38,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:38,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:38,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:49:38,472 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:38,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash -632578869, now seen corresponding path program 6 times [2024-06-21 16:49:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737599727] [2024-06-21 16:49:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:39,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:39,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737599727] [2024-06-21 16:49:39,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737599727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:39,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:39,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102990071] [2024-06-21 16:49:39,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:39,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:39,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:39,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:39,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:39,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:39,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 451 transitions, 4711 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:39,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:39,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:39,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:41,332 INFO L124 PetriNetUnfolderBase]: 4225/6939 cut-off events. [2024-06-21 16:49:41,333 INFO L125 PetriNetUnfolderBase]: For 2486672/2486678 co-relation queries the response was YES. [2024-06-21 16:49:41,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81049 conditions, 6939 events. 4225/6939 cut-off events. For 2486672/2486678 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45542 event pairs, 958 based on Foata normal form. 5/6867 useless extension candidates. Maximal degree in co-relation 80862. Up to 6343 conditions per place. [2024-06-21 16:49:41,418 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 41 changer transitions 0/465 dead transitions. [2024-06-21 16:49:41,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 465 transitions, 5587 flow [2024-06-21 16:49:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:41,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:41,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:49:41,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:49:41,419 INFO L175 Difference]: Start difference. First operand has 385 places, 451 transitions, 4711 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:49:41,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 465 transitions, 5587 flow [2024-06-21 16:49:46,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 465 transitions, 5377 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:46,264 INFO L231 Difference]: Finished difference. Result has 386 places, 451 transitions, 4589 flow [2024-06-21 16:49:46,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=386, PETRI_TRANSITIONS=451} [2024-06-21 16:49:46,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-21 16:49:46,265 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 451 transitions, 4589 flow [2024-06-21 16:49:46,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:46,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:46,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:46,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:49:46,265 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:46,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1301324597, now seen corresponding path program 7 times [2024-06-21 16:49:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:46,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575753421] [2024-06-21 16:49:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:47,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:47,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575753421] [2024-06-21 16:49:47,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575753421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:47,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:47,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156816227] [2024-06-21 16:49:47,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:47,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:47,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:47,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:47,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:47,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 451 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:47,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:47,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:47,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:49,426 INFO L124 PetriNetUnfolderBase]: 4238/6969 cut-off events. [2024-06-21 16:49:49,426 INFO L125 PetriNetUnfolderBase]: For 2531828/2531837 co-relation queries the response was YES. [2024-06-21 16:49:49,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81617 conditions, 6969 events. 4238/6969 cut-off events. For 2531828/2531837 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45869 event pairs, 966 based on Foata normal form. 7/6897 useless extension candidates. Maximal degree in co-relation 81429. Up to 6299 conditions per place. [2024-06-21 16:49:49,515 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 80 changer transitions 0/478 dead transitions. [2024-06-21 16:49:49,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 478 transitions, 6475 flow [2024-06-21 16:49:49,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:49,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:49:49,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:49:49,516 INFO L175 Difference]: Start difference. First operand has 386 places, 451 transitions, 4589 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:49:49,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 478 transitions, 6475 flow [2024-06-21 16:49:54,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 478 transitions, 6381 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:54,456 INFO L231 Difference]: Finished difference. Result has 388 places, 465 transitions, 5124 flow [2024-06-21 16:49:54,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5124, PETRI_PLACES=388, PETRI_TRANSITIONS=465} [2024-06-21 16:49:54,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-21 16:49:54,457 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 465 transitions, 5124 flow [2024-06-21 16:49:54,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:54,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:54,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:54,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:49:54,458 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1301562925, now seen corresponding path program 10 times [2024-06-21 16:49:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:54,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296294449] [2024-06-21 16:49:54,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:55,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:55,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296294449] [2024-06-21 16:49:55,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296294449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:55,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:55,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:55,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026776529] [2024-06-21 16:49:55,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:55,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:55,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:55,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:55,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:55,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:55,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 465 transitions, 5124 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:55,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:55,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:55,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:57,797 INFO L124 PetriNetUnfolderBase]: 4372/7165 cut-off events. [2024-06-21 16:49:57,797 INFO L125 PetriNetUnfolderBase]: For 2584027/2584036 co-relation queries the response was YES. [2024-06-21 16:49:57,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83742 conditions, 7165 events. 4372/7165 cut-off events. For 2584027/2584036 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 46879 event pairs, 1000 based on Foata normal form. 5/7163 useless extension candidates. Maximal degree in co-relation 83552. Up to 6516 conditions per place. [2024-06-21 16:49:57,888 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 365 selfloop transitions, 87 changer transitions 0/483 dead transitions. [2024-06-21 16:49:57,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 483 transitions, 6636 flow [2024-06-21 16:49:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:57,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:57,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:49:57,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:49:57,889 INFO L175 Difference]: Start difference. First operand has 388 places, 465 transitions, 5124 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:49:57,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 483 transitions, 6636 flow [2024-06-21 16:50:02,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 483 transitions, 6416 flow, removed 103 selfloop flow, removed 2 redundant places. [2024-06-21 16:50:02,481 INFO L231 Difference]: Finished difference. Result has 394 places, 471 transitions, 5378 flow [2024-06-21 16:50:02,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4912, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5378, PETRI_PLACES=394, PETRI_TRANSITIONS=471} [2024-06-21 16:50:02,482 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-21 16:50:02,482 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 471 transitions, 5378 flow [2024-06-21 16:50:02,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:02,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:02,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:02,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:50:02,482 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:02,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1301799827, now seen corresponding path program 8 times [2024-06-21 16:50:02,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208185010] [2024-06-21 16:50:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:02,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:03,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:03,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208185010] [2024-06-21 16:50:03,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208185010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:03,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:03,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:03,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996706900] [2024-06-21 16:50:03,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:03,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:03,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:03,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 471 transitions, 5378 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:03,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:03,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:03,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:05,565 INFO L124 PetriNetUnfolderBase]: 4256/6992 cut-off events. [2024-06-21 16:50:05,565 INFO L125 PetriNetUnfolderBase]: For 2609588/2609597 co-relation queries the response was YES. [2024-06-21 16:50:05,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82725 conditions, 6992 events. 4256/6992 cut-off events. For 2609588/2609597 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 46042 event pairs, 966 based on Foata normal form. 7/6920 useless extension candidates. Maximal degree in co-relation 82533. Up to 6319 conditions per place. [2024-06-21 16:50:05,672 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 85 changer transitions 0/490 dead transitions. [2024-06-21 16:50:05,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 490 transitions, 7068 flow [2024-06-21 16:50:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:50:05,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:50:05,673 INFO L175 Difference]: Start difference. First operand has 394 places, 471 transitions, 5378 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:50:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 490 transitions, 7068 flow [2024-06-21 16:50:10,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 490 transitions, 6816 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:10,083 INFO L231 Difference]: Finished difference. Result has 398 places, 477 transitions, 5486 flow [2024-06-21 16:50:10,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5486, PETRI_PLACES=398, PETRI_TRANSITIONS=477} [2024-06-21 16:50:10,083 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-21 16:50:10,083 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 477 transitions, 5486 flow [2024-06-21 16:50:10,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:10,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:10,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:50:10,083 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:10,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1021938647, now seen corresponding path program 9 times [2024-06-21 16:50:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636695946] [2024-06-21 16:50:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:10,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:11,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:11,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636695946] [2024-06-21 16:50:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636695946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:11,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:11,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483036571] [2024-06-21 16:50:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:11,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:11,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:11,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:11,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 477 transitions, 5486 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:11,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:11,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:11,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:13,237 INFO L124 PetriNetUnfolderBase]: 4261/6989 cut-off events. [2024-06-21 16:50:13,238 INFO L125 PetriNetUnfolderBase]: For 2642197/2642206 co-relation queries the response was YES. [2024-06-21 16:50:13,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83062 conditions, 6989 events. 4261/6989 cut-off events. For 2642197/2642206 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45892 event pairs, 963 based on Foata normal form. 7/6917 useless extension candidates. Maximal degree in co-relation 82868. Up to 6325 conditions per place. [2024-06-21 16:50:13,329 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 94 changer transitions 0/494 dead transitions. [2024-06-21 16:50:13,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 494 transitions, 7129 flow [2024-06-21 16:50:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:50:13,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:50:13,330 INFO L175 Difference]: Start difference. First operand has 398 places, 477 transitions, 5486 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:50:13,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 494 transitions, 7129 flow [2024-06-21 16:50:19,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 494 transitions, 6907 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:19,830 INFO L231 Difference]: Finished difference. Result has 402 places, 481 transitions, 5583 flow [2024-06-21 16:50:19,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5269, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5583, PETRI_PLACES=402, PETRI_TRANSITIONS=481} [2024-06-21 16:50:19,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-21 16:50:19,830 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 481 transitions, 5583 flow [2024-06-21 16:50:19,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:19,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:19,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:19,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:50:19,831 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:19,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1301800261, now seen corresponding path program 10 times [2024-06-21 16:50:19,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922072096] [2024-06-21 16:50:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:19,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922072096] [2024-06-21 16:50:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922072096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:20,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:20,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332744311] [2024-06-21 16:50:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:20,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:20,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:50:20,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 481 transitions, 5583 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:50:20,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:20,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:50:20,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:23,009 INFO L124 PetriNetUnfolderBase]: 4181/6918 cut-off events. [2024-06-21 16:50:23,010 INFO L125 PetriNetUnfolderBase]: For 2682605/2682611 co-relation queries the response was YES. [2024-06-21 16:50:23,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82985 conditions, 6918 events. 4181/6918 cut-off events. For 2682605/2682611 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45958 event pairs, 953 based on Foata normal form. 3/6840 useless extension candidates. Maximal degree in co-relation 82790. Up to 6074 conditions per place. [2024-06-21 16:50:23,105 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 337 selfloop transitions, 87 changer transitions 0/499 dead transitions. [2024-06-21 16:50:23,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 499 transitions, 7065 flow [2024-06-21 16:50:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:50:23,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:50:23,106 INFO L175 Difference]: Start difference. First operand has 402 places, 481 transitions, 5583 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:50:23,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 499 transitions, 7065 flow [2024-06-21 16:50:28,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 499 transitions, 6837 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-21 16:50:28,930 INFO L231 Difference]: Finished difference. Result has 406 places, 487 transitions, 5849 flow [2024-06-21 16:50:28,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5355, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5849, PETRI_PLACES=406, PETRI_TRANSITIONS=487} [2024-06-21 16:50:28,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-21 16:50:28,930 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 487 transitions, 5849 flow [2024-06-21 16:50:28,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:50:28,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:28,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:28,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:50:28,931 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:28,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1301800075, now seen corresponding path program 11 times [2024-06-21 16:50:28,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:28,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101515033] [2024-06-21 16:50:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:28,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:30,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:30,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101515033] [2024-06-21 16:50:30,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101515033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:30,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:30,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:30,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127522272] [2024-06-21 16:50:30,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:30,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:30,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:30,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:30,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 487 transitions, 5849 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:30,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:30,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:30,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:32,254 INFO L124 PetriNetUnfolderBase]: 4400/7206 cut-off events. [2024-06-21 16:50:32,254 INFO L125 PetriNetUnfolderBase]: For 2733511/2733520 co-relation queries the response was YES. [2024-06-21 16:50:32,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85401 conditions, 7206 events. 4400/7206 cut-off events. For 2733511/2733520 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47089 event pairs, 1000 based on Foata normal form. 5/7204 useless extension candidates. Maximal degree in co-relation 85205. Up to 6547 conditions per place. [2024-06-21 16:50:32,349 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 88 changer transitions 0/502 dead transitions. [2024-06-21 16:50:32,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 502 transitions, 7229 flow [2024-06-21 16:50:32,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:32,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:50:32,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:50:32,350 INFO L175 Difference]: Start difference. First operand has 406 places, 487 transitions, 5849 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:50:32,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 502 transitions, 7229 flow [2024-06-21 16:50:37,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 502 transitions, 6919 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:37,746 INFO L231 Difference]: Finished difference. Result has 409 places, 490 transitions, 5837 flow [2024-06-21 16:50:37,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5539, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5837, PETRI_PLACES=409, PETRI_TRANSITIONS=490} [2024-06-21 16:50:37,747 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 364 predicate places. [2024-06-21 16:50:37,747 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 490 transitions, 5837 flow [2024-06-21 16:50:37,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:37,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:37,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:37,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:50:37,748 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:37,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931781, now seen corresponding path program 11 times [2024-06-21 16:50:37,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:37,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772607689] [2024-06-21 16:50:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:37,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:38,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:38,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772607689] [2024-06-21 16:50:38,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772607689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:38,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:38,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940756215] [2024-06-21 16:50:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:38,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:38,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:38,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:38,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:38,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:50:38,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 490 transitions, 5837 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:50:38,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:38,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:50:38,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:40,821 INFO L124 PetriNetUnfolderBase]: 4191/6932 cut-off events. [2024-06-21 16:50:40,821 INFO L125 PetriNetUnfolderBase]: For 2742794/2742800 co-relation queries the response was YES. [2024-06-21 16:50:40,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82982 conditions, 6932 events. 4191/6932 cut-off events. For 2742794/2742800 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46049 event pairs, 950 based on Foata normal form. 3/6854 useless extension candidates. Maximal degree in co-relation 82785. Up to 6085 conditions per place. [2024-06-21 16:50:41,149 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 88 changer transitions 0/505 dead transitions. [2024-06-21 16:50:41,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 505 transitions, 7165 flow [2024-06-21 16:50:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:50:41,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:50:41,151 INFO L175 Difference]: Start difference. First operand has 409 places, 490 transitions, 5837 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:50:41,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 505 transitions, 7165 flow [2024-06-21 16:50:46,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 505 transitions, 6907 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 16:50:46,841 INFO L231 Difference]: Finished difference. Result has 412 places, 493 transitions, 5901 flow [2024-06-21 16:50:46,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5579, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5901, PETRI_PLACES=412, PETRI_TRANSITIONS=493} [2024-06-21 16:50:46,842 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-21 16:50:46,842 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 493 transitions, 5901 flow [2024-06-21 16:50:46,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:50:46,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:46,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:46,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:50:46,842 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:46,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931347, now seen corresponding path program 10 times [2024-06-21 16:50:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:46,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060007704] [2024-06-21 16:50:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:46,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:47,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:47,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060007704] [2024-06-21 16:50:47,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060007704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:47,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:47,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:47,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309575062] [2024-06-21 16:50:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:47,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:47,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:47,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:47,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:47,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 493 transitions, 5901 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:47,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:47,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:47,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:49,807 INFO L124 PetriNetUnfolderBase]: 4273/7010 cut-off events. [2024-06-21 16:50:49,807 INFO L125 PetriNetUnfolderBase]: For 2759648/2759657 co-relation queries the response was YES. [2024-06-21 16:50:49,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83339 conditions, 7010 events. 4273/7010 cut-off events. For 2759648/2759657 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 46095 event pairs, 966 based on Foata normal form. 7/6938 useless extension candidates. Maximal degree in co-relation 83141. Up to 6341 conditions per place. [2024-06-21 16:50:49,900 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 89 changer transitions 0/506 dead transitions. [2024-06-21 16:50:49,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 506 transitions, 7457 flow [2024-06-21 16:50:49,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:50:49,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:50:49,902 INFO L175 Difference]: Start difference. First operand has 412 places, 493 transitions, 5901 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:50:49,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 506 transitions, 7457 flow [2024-06-21 16:50:56,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 506 transitions, 7017 flow, removed 100 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:56,370 INFO L231 Difference]: Finished difference. Result has 413 places, 493 transitions, 5645 flow [2024-06-21 16:50:56,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5645, PETRI_PLACES=413, PETRI_TRANSITIONS=493} [2024-06-21 16:50:56,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-21 16:50:56,370 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 493 transitions, 5645 flow [2024-06-21 16:50:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:56,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:56,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:56,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:50:56,371 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)] === [2024-06-21 16:50:56,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1478931595, now seen corresponding path program 12 times [2024-06-21 16:50:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:56,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680056306] [2024-06-21 16:50:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:57,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:57,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680056306] [2024-06-21 16:50:57,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680056306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:57,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:57,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:50:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626170244] [2024-06-21 16:50:57,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:57,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:50:57,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:50:57,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:50:57,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:57,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 493 transitions, 5645 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:57,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:57,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:57,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:59,506 INFO L124 PetriNetUnfolderBase]: 4398/7192 cut-off events. [2024-06-21 16:50:59,506 INFO L125 PetriNetUnfolderBase]: For 2792991/2793000 co-relation queries the response was YES. [2024-06-21 16:50:59,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84235 conditions, 7192 events. 4398/7192 cut-off events. For 2792991/2793000 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 46927 event pairs, 997 based on Foata normal form. 5/7190 useless extension candidates. Maximal degree in co-relation 84037. Up to 6547 conditions per place. [2024-06-21 16:50:59,603 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 380 selfloop transitions, 90 changer transitions 0/504 dead transitions. [2024-06-21 16:50:59,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 504 transitions, 6611 flow [2024-06-21 16:50:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:50:59,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-21 16:50:59,604 INFO L175 Difference]: Start difference. First operand has 413 places, 493 transitions, 5645 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:50:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 504 transitions, 6611 flow [2024-06-21 16:51:05,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 504 transitions, 6281 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:05,284 INFO L231 Difference]: Finished difference. Result has 414 places, 493 transitions, 5501 flow [2024-06-21 16:51:05,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5501, PETRI_PLACES=414, PETRI_TRANSITIONS=493} [2024-06-21 16:51:05,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-21 16:51:05,285 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 493 transitions, 5501 flow [2024-06-21 16:51:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:51:05,285 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)] === [2024-06-21 16:51:05,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1478634677, now seen corresponding path program 11 times [2024-06-21 16:51:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979023393] [2024-06-21 16:51:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:06,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:06,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979023393] [2024-06-21 16:51:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979023393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:06,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:06,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:06,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365712648] [2024-06-21 16:51:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:06,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:06,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:06,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:06,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:06,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:06,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 493 transitions, 5501 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:06,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:06,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:06,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:08,587 INFO L124 PetriNetUnfolderBase]: 4267/6998 cut-off events. [2024-06-21 16:51:08,587 INFO L125 PetriNetUnfolderBase]: For 2802144/2802153 co-relation queries the response was YES. [2024-06-21 16:51:08,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82856 conditions, 6998 events. 4267/6998 cut-off events. For 2802144/2802153 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45954 event pairs, 966 based on Foata normal form. 7/6926 useless extension candidates. Maximal degree in co-relation 82658. Up to 6335 conditions per place. [2024-06-21 16:51:08,696 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 368 selfloop transitions, 90 changer transitions 0/505 dead transitions. [2024-06-21 16:51:08,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 505 transitions, 6753 flow [2024-06-21 16:51:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:51:08,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:51:08,697 INFO L175 Difference]: Start difference. First operand has 414 places, 493 transitions, 5501 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:51:08,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 505 transitions, 6753 flow [2024-06-21 16:51:15,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 505 transitions, 6425 flow, removed 39 selfloop flow, removed 9 redundant places. [2024-06-21 16:51:15,182 INFO L231 Difference]: Finished difference. Result has 413 places, 493 transitions, 5359 flow [2024-06-21 16:51:15,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5359, PETRI_PLACES=413, PETRI_TRANSITIONS=493} [2024-06-21 16:51:15,182 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-21 16:51:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 493 transitions, 5359 flow [2024-06-21 16:51:15,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:15,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:15,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:15,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:51:15,183 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)] === [2024-06-21 16:51:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1016224727, now seen corresponding path program 12 times [2024-06-21 16:51:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671352783] [2024-06-21 16:51:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:15,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:16,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:16,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671352783] [2024-06-21 16:51:16,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671352783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:16,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:16,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:16,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127817861] [2024-06-21 16:51:16,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:16,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:16,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:16,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:16,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:16,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:16,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 493 transitions, 5359 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:16,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:16,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:16,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:18,271 INFO L124 PetriNetUnfolderBase]: 4264/6996 cut-off events. [2024-06-21 16:51:18,271 INFO L125 PetriNetUnfolderBase]: For 2824652/2824661 co-relation queries the response was YES. [2024-06-21 16:51:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82685 conditions, 6996 events. 4264/6996 cut-off events. For 2824652/2824661 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45901 event pairs, 963 based on Foata normal form. 7/6924 useless extension candidates. Maximal degree in co-relation 82487. Up to 6332 conditions per place. [2024-06-21 16:51:18,366 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 363 selfloop transitions, 94 changer transitions 0/504 dead transitions. [2024-06-21 16:51:18,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 504 transitions, 6299 flow [2024-06-21 16:51:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:18,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:18,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:51:18,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:51:18,368 INFO L175 Difference]: Start difference. First operand has 413 places, 493 transitions, 5359 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:51:18,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 504 transitions, 6299 flow [2024-06-21 16:51:25,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 504 transitions, 6007 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:25,830 INFO L231 Difference]: Finished difference. Result has 414 places, 493 transitions, 5261 flow [2024-06-21 16:51:25,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5261, PETRI_PLACES=414, PETRI_TRANSITIONS=493} [2024-06-21 16:51:25,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 369 predicate places. [2024-06-21 16:51:25,831 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 493 transitions, 5261 flow [2024-06-21 16:51:25,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:25,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:25,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:25,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:51:25,831 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)] === [2024-06-21 16:51:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1479051751, now seen corresponding path program 12 times [2024-06-21 16:51:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:25,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409830843] [2024-06-21 16:51:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:27,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:27,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409830843] [2024-06-21 16:51:27,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409830843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:27,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:27,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:51:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361790048] [2024-06-21 16:51:27,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:51:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:51:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:51:27,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:51:27,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 493 transitions, 5261 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:51:27,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:27,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:51:27,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:29,283 INFO L124 PetriNetUnfolderBase]: 4176/6912 cut-off events. [2024-06-21 16:51:29,284 INFO L125 PetriNetUnfolderBase]: For 2852523/2852526 co-relation queries the response was YES. [2024-06-21 16:51:29,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82208 conditions, 6912 events. 4176/6912 cut-off events. For 2852523/2852526 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 45949 event pairs, 929 based on Foata normal form. 1/6834 useless extension candidates. Maximal degree in co-relation 82009. Up to 6181 conditions per place. [2024-06-21 16:51:29,378 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 399 selfloop transitions, 29 changer transitions 0/504 dead transitions. [2024-06-21 16:51:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 504 transitions, 6143 flow [2024-06-21 16:51:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:51:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:51:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:51:29,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:51:29,379 INFO L175 Difference]: Start difference. First operand has 414 places, 493 transitions, 5261 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:51:29,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 504 transitions, 6143 flow [2024-06-21 16:51:35,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 504 transitions, 5855 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:35,451 INFO L231 Difference]: Finished difference. Result has 415 places, 493 transitions, 5037 flow [2024-06-21 16:51:35,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4973, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5037, PETRI_PLACES=415, PETRI_TRANSITIONS=493} [2024-06-21 16:51:35,452 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-21 16:51:35,452 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 493 transitions, 5037 flow [2024-06-21 16:51:35,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-21 16:51:35,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:35,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:51:35,452 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:35,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:35,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1897053656, now seen corresponding path program 2 times [2024-06-21 16:51:35,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:35,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517925380] [2024-06-21 16:51:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:35,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:36,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:36,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517925380] [2024-06-21 16:51:36,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517925380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:36,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:36,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:51:36,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271114985] [2024-06-21 16:51:36,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:36,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:51:36,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:51:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:51:36,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:36,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 493 transitions, 5037 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:36,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:36,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:36,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:39,649 INFO L124 PetriNetUnfolderBase]: 4553/7489 cut-off events. [2024-06-21 16:51:39,650 INFO L125 PetriNetUnfolderBase]: For 2981929/2981932 co-relation queries the response was YES. [2024-06-21 16:51:39,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85812 conditions, 7489 events. 4553/7489 cut-off events. For 2981929/2981932 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49665 event pairs, 984 based on Foata normal form. 12/7494 useless extension candidates. Maximal degree in co-relation 85612. Up to 6136 conditions per place. [2024-06-21 16:51:39,767 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 401 selfloop transitions, 112 changer transitions 0/547 dead transitions. [2024-06-21 16:51:39,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 547 transitions, 6473 flow [2024-06-21 16:51:39,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:51:39,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:51:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-21 16:51:39,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47107438016528924 [2024-06-21 16:51:39,768 INFO L175 Difference]: Start difference. First operand has 415 places, 493 transitions, 5037 flow. Second operand 11 states and 228 transitions. [2024-06-21 16:51:39,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 547 transitions, 6473 flow [2024-06-21 16:51:46,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 547 transitions, 6339 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 16:51:46,754 INFO L231 Difference]: Finished difference. Result has 419 places, 504 transitions, 5373 flow [2024-06-21 16:51:46,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5373, PETRI_PLACES=419, PETRI_TRANSITIONS=504} [2024-06-21 16:51:46,754 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 374 predicate places. [2024-06-21 16:51:46,754 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 504 transitions, 5373 flow [2024-06-21 16:51:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:46,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:46,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:46,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:51:46,755 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:46,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 956918330, now seen corresponding path program 3 times [2024-06-21 16:51:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987828318] [2024-06-21 16:51:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:48,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:48,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:48,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987828318] [2024-06-21 16:51:48,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987828318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:48,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:48,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:51:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682379988] [2024-06-21 16:51:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:48,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:51:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:51:48,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:51:48,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:48,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 504 transitions, 5373 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:48,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:48,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:48,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:50,924 INFO L124 PetriNetUnfolderBase]: 4676/7730 cut-off events. [2024-06-21 16:51:50,924 INFO L125 PetriNetUnfolderBase]: For 3036020/3036023 co-relation queries the response was YES. [2024-06-21 16:51:50,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88527 conditions, 7730 events. 4676/7730 cut-off events. For 3036020/3036023 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 51889 event pairs, 1026 based on Foata normal form. 12/7735 useless extension candidates. Maximal degree in co-relation 88325. Up to 6441 conditions per place. [2024-06-21 16:51:51,026 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 117 changer transitions 0/555 dead transitions. [2024-06-21 16:51:51,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 555 transitions, 6801 flow [2024-06-21 16:51:51,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:51:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:51:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-21 16:51:51,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-21 16:51:51,028 INFO L175 Difference]: Start difference. First operand has 419 places, 504 transitions, 5373 flow. Second operand 11 states and 227 transitions. [2024-06-21 16:51:51,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 555 transitions, 6801 flow [2024-06-21 16:51:57,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 555 transitions, 6536 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:51:57,665 INFO L231 Difference]: Finished difference. Result has 426 places, 512 transitions, 5554 flow [2024-06-21 16:51:57,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5554, PETRI_PLACES=426, PETRI_TRANSITIONS=512} [2024-06-21 16:51:57,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-21 16:51:57,666 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 512 transitions, 5554 flow [2024-06-21 16:51:57,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:57,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:57,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:51:57,666 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:57,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1654194728, now seen corresponding path program 4 times [2024-06-21 16:51:57,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:57,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691078269] [2024-06-21 16:51:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:59,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691078269] [2024-06-21 16:51:59,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691078269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:59,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:59,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:51:59,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152570728] [2024-06-21 16:51:59,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:59,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:51:59,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:51:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:51:59,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:59,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 512 transitions, 5554 flow. Second operand has 12 states, 12 states have (on average 12.25) internal successors, (147), 12 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:59,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:59,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:59,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:01,925 INFO L124 PetriNetUnfolderBase]: 4786/7940 cut-off events. [2024-06-21 16:52:01,925 INFO L125 PetriNetUnfolderBase]: For 3082129/3082132 co-relation queries the response was YES. [2024-06-21 16:52:01,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90512 conditions, 7940 events. 4786/7940 cut-off events. For 3082129/3082132 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 53913 event pairs, 1056 based on Foata normal form. 12/7945 useless extension candidates. Maximal degree in co-relation 90307. Up to 6714 conditions per place. [2024-06-21 16:52:02,030 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 400 selfloop transitions, 126 changer transitions 0/560 dead transitions. [2024-06-21 16:52:02,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 560 transitions, 6956 flow [2024-06-21 16:52:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 16:52:02,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 16:52:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-21 16:52:02,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669421487603306 [2024-06-21 16:52:02,032 INFO L175 Difference]: Start difference. First operand has 426 places, 512 transitions, 5554 flow. Second operand 11 states and 226 transitions. [2024-06-21 16:52:02,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 560 transitions, 6956 flow