./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix028_power.opt_pso.opt_rmo.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/mix028_power.opt_pso.opt_rmo.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:38:37,696 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:38:37,758 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:38:37,763 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:38:37,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:38:37,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:38:37,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:38:37,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:38:37,786 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:38:37,789 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:38:37,789 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:38:37,789 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:38:37,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:38:37,791 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:38:37,791 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:38:37,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:38:37,791 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:38:37,791 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:38:37,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:38:37,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:38:37,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:38:37,792 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:38:37,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:38:37,793 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:38:37,793 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:38:37,793 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:38:37,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:38:37,793 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:38:37,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:38:37,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:38:37,794 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:38:37,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:38:37,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:38:37,796 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:38:37,796 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:38:37,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:38:37,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:38:37,993 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:38:38,010 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:38:38,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:38:38,013 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:38:38,014 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:38:38,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-21 16:38:38,203 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:38:38,204 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:38:38,205 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 16:38:39,219 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:38:39,426 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:38:39,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 16:38:39,448 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e1234092/a6c49d21dbd64252bcc750dc7d0f58f9/FLAG20d4b8be1 [2024-06-21 16:38:39,459 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e1234092/a6c49d21dbd64252bcc750dc7d0f58f9 [2024-06-21 16:38:39,459 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:38:39,460 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:38:39,461 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:38:39,461 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:38:39,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:38:39,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:38" (1/2) ... [2024-06-21 16:38:39,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7873b163 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:39, skipping insertion in model container [2024-06-21 16:38:39,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:38" (1/2) ... [2024-06-21 16:38:39,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49f86a5f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:38:39, skipping insertion in model container [2024-06-21 16:38:39,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:38:39" (2/2) ... [2024-06-21 16:38:39,472 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7873b163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:39, skipping insertion in model container [2024-06-21 16:38:39,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:38:39" (2/2) ... [2024-06-21 16:38:39,472 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:38:39,546 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:38:39,547 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:38:39,547 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:38:39,548 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (z == 0 || z == 1)) [2024-06-21 16:38:39,548 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:38:39,548 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-21 16:38:39,587 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:38:39,878 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:38:39,884 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:38:40,014 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:38:40,052 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:38:40,053 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40 WrapperNode [2024-06-21 16:38:40,053 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:38:40,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:38:40,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:38:40,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:38:40,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,128 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-21 16:38:40,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:38:40,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:38:40,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:38:40,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:38:40,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,140 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,152 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 16:38:40,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,168 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,181 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,182 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,185 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:38:40,185 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:38:40,185 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:38:40,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:38:40,194 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (1/1) ... [2024-06-21 16:38:40,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:38:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:38:40,222 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 16:38:40,235 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 16:38:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:38:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:38:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:38:40,253 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:38:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:38:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:38:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:38:40,254 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:38:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:38:40,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:38:40,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:38:40,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:38:40,256 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 16:38:40,369 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:38:40,372 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:38:40,688 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:38:40,688 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:38:40,838 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:38:40,838 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:38:40,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:38:40 BoogieIcfgContainer [2024-06-21 16:38:40,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:38:40,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:38:40,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:38:40,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:38:40,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:38:38" (1/4) ... [2024-06-21 16:38:40,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a35f70 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:38:40, skipping insertion in model container [2024-06-21 16:38:40,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:38:39" (2/4) ... [2024-06-21 16:38:40,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a35f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:38:40, skipping insertion in model container [2024-06-21 16:38:40,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:38:40" (3/4) ... [2024-06-21 16:38:40,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a35f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:38:40, skipping insertion in model container [2024-06-21 16:38:40,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:38:40" (4/4) ... [2024-06-21 16:38:40,846 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.opt_pso.opt_rmo.opt.i [2024-06-21 16:38:40,859 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:38:40,859 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:38:40,859 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:38:40,895 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:38:40,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:38:40,952 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-21 16:38:40,953 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:38:40,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:38:40,955 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-21 16:38:40,959 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-21 16:38:40,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:38:40,976 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;@aef6e51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:38:40,976 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:38:40,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:38:40,981 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:38:40,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:38:40,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:40,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:38:40,982 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 16:38:40,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash 372680172, now seen corresponding path program 1 times [2024-06-21 16:38:41,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:41,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976529372] [2024-06-21 16:38:41,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:41,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976529372] [2024-06-21 16:38:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976529372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:41,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:41,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:38:41,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267314734] [2024-06-21 16:38:41,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:38:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:41,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:38:41,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:38:41,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-21 16:38:41,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:41,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:41,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-21 16:38:41,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:42,062 INFO L124 PetriNetUnfolderBase]: 1407/2237 cut-off events. [2024-06-21 16:38:42,062 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-06-21 16:38:42,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4441 conditions, 2237 events. 1407/2237 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11042 event pairs, 989 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 4429. Up to 2105 conditions per place. [2024-06-21 16:38:42,076 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-21 16:38:42,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-21 16:38:42,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:38:42,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:38:42,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-21 16:38:42,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-21 16:38:42,089 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 72 transitions. [2024-06-21 16:38:42,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-21 16:38:42,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:42,093 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-21 16:38:42,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-21 16:38:42,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-21 16:38:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-21 16:38:42,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:42,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:38:42,098 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 16:38:42,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1663882633, now seen corresponding path program 1 times [2024-06-21 16:38:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:42,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946071799] [2024-06-21 16:38:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:42,500 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 16:38:42,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946071799] [2024-06-21 16:38:42,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946071799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:42,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:42,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:38:42,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44072283] [2024-06-21 16:38:42,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:38:42,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:42,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:38:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:38:42,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:38:42,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:42,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:38:42,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:42,793 INFO L124 PetriNetUnfolderBase]: 1653/2528 cut-off events. [2024-06-21 16:38:42,794 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-21 16:38:42,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5717 conditions, 2528 events. 1653/2528 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12068 event pairs, 1038 based on Foata normal form. 3/2519 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-21 16:38:42,804 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-21 16:38:42,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 240 flow [2024-06-21 16:38:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:38:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:38:42,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-06-21 16:38:42,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-21 16:38:42,808 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 90 transitions. [2024-06-21 16:38:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 240 flow [2024-06-21 16:38:42,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:42,810 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-21 16:38:42,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:38:42,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-21 16:38:42,811 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-21 16:38:42,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:42,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:42,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:42,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:38:42,814 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 16:38:42,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 40755157, now seen corresponding path program 1 times [2024-06-21 16:38:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:42,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684473949] [2024-06-21 16:38:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:42,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:43,276 INFO 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 16:38:43,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:43,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684473949] [2024-06-21 16:38:43,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684473949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:43,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:43,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:38:43,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171674471] [2024-06-21 16:38:43,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:43,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:38:43,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:43,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:38:43,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:38:43,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:38:43,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:43,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:43,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:38:43,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:43,574 INFO L124 PetriNetUnfolderBase]: 1641/2510 cut-off events. [2024-06-21 16:38:43,574 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-21 16:38:43,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6286 conditions, 2510 events. 1641/2510 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11890 event pairs, 746 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 6272. Up to 2393 conditions per place. [2024-06-21 16:38:43,584 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-21 16:38:43,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 322 flow [2024-06-21 16:38:43,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-21 16:38:43,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-21 16:38:43,587 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 111 transitions. [2024-06-21 16:38:43,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 322 flow [2024-06-21 16:38:43,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 63 transitions, 308 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:38:43,589 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 172 flow [2024-06-21 16:38:43,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 16:38:43,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2024-06-21 16:38:43,589 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 172 flow [2024-06-21 16:38:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:43,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:43,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:43,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:38:43,590 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:43,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:43,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1204929134, now seen corresponding path program 1 times [2024-06-21 16:38:43,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:43,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444332567] [2024-06-21 16:38:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:43,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:44,451 INFO 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 16:38:44,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:44,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444332567] [2024-06-21 16:38:44,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444332567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:44,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:44,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194528424] [2024-06-21 16:38:44,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:44,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-21 16:38:44,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 172 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:44,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:44,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-21 16:38:44,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:44,849 INFO L124 PetriNetUnfolderBase]: 1632/2495 cut-off events. [2024-06-21 16:38:44,850 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-06-21 16:38:44,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6837 conditions, 2495 events. 1632/2495 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11828 event pairs, 582 based on Foata normal form. 6/2489 useless extension candidates. Maximal degree in co-relation 6822. Up to 2348 conditions per place. [2024-06-21 16:38:44,862 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 16:38:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 376 flow [2024-06-21 16:38:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 16:38:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-21 16:38:44,864 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 172 flow. Second operand 6 states and 127 transitions. [2024-06-21 16:38:44,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 376 flow [2024-06-21 16:38:44,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 352 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:44,867 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 191 flow [2024-06-21 16:38:44,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=191, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-21 16:38:44,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-21 16:38:44,868 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 191 flow [2024-06-21 16:38:44,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:44,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:44,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:44,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:38:44,868 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 16:38:44,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:44,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1788486672, now seen corresponding path program 1 times [2024-06-21 16:38:44,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:44,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627002029] [2024-06-21 16:38:44,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:44,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:45,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:45,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627002029] [2024-06-21 16:38:45,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627002029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:45,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:45,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:38:45,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742272547] [2024-06-21 16:38:45,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:45,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:38:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:45,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:38:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:38:45,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-21 16:38:45,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 191 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:45,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:45,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-21 16:38:45,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:45,720 INFO L124 PetriNetUnfolderBase]: 1375/2212 cut-off events. [2024-06-21 16:38:45,720 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2024-06-21 16:38:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6333 conditions, 2212 events. 1375/2212 cut-off events. For 3103/3103 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10970 event pairs, 673 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 6316. Up to 2047 conditions per place. [2024-06-21 16:38:45,731 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 43 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-21 16:38:45,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 56 transitions, 337 flow [2024-06-21 16:38:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:45,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-21 16:38:45,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:45,733 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 191 flow. Second operand 5 states and 90 transitions. [2024-06-21 16:38:45,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 56 transitions, 337 flow [2024-06-21 16:38:45,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 304 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:45,740 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 204 flow [2024-06-21 16:38:45,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-21 16:38:45,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-21 16:38:45,742 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 204 flow [2024-06-21 16:38:45,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:45,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:45,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:38:45,744 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 16:38:45,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 391489018, now seen corresponding path program 1 times [2024-06-21 16:38:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:45,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059451275] [2024-06-21 16:38:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:46,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:46,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059451275] [2024-06-21 16:38:46,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059451275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:46,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:46,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369800065] [2024-06-21 16:38:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:46,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:46,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:46,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:46,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:46,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:46,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:46,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:46,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:46,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:46,604 INFO L124 PetriNetUnfolderBase]: 1629/2504 cut-off events. [2024-06-21 16:38:46,604 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-21 16:38:46,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7754 conditions, 2504 events. 1629/2504 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11857 event pairs, 791 based on Foata normal form. 3/2507 useless extension candidates. Maximal degree in co-relation 7735. Up to 2382 conditions per place. [2024-06-21 16:38:46,617 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-21 16:38:46,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 458 flow [2024-06-21 16:38:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:46,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-21 16:38:46,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4349593495934959 [2024-06-21 16:38:46,618 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 204 flow. Second operand 6 states and 107 transitions. [2024-06-21 16:38:46,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 458 flow [2024-06-21 16:38:46,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 436 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:46,622 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 307 flow [2024-06-21 16:38:46,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-21 16:38:46,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-21 16:38:46,623 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 307 flow [2024-06-21 16:38:46,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:46,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:46,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:46,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:38:46,624 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 16:38:46,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:46,624 INFO L85 PathProgramCache]: Analyzing trace with hash -361707221, now seen corresponding path program 1 times [2024-06-21 16:38:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326557167] [2024-06-21 16:38:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:46,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:47,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:47,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326557167] [2024-06-21 16:38:47,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326557167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:47,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:47,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22669641] [2024-06-21 16:38:47,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:47,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:47,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:47,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 307 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:47,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:47,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:47,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:47,539 INFO L124 PetriNetUnfolderBase]: 1697/2611 cut-off events. [2024-06-21 16:38:47,539 INFO L125 PetriNetUnfolderBase]: For 7867/7877 co-relation queries the response was YES. [2024-06-21 16:38:47,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9050 conditions, 2611 events. 1697/2611 cut-off events. For 7867/7877 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12352 event pairs, 793 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 9028. Up to 2473 conditions per place. [2024-06-21 16:38:47,558 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-21 16:38:47,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 77 transitions, 517 flow [2024-06-21 16:38:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-21 16:38:47,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 16:38:47,560 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 307 flow. Second operand 6 states and 104 transitions. [2024-06-21 16:38:47,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 77 transitions, 517 flow [2024-06-21 16:38:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 501 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-21 16:38:47,565 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 351 flow [2024-06-21 16:38:47,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=351, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-21 16:38:47,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-21 16:38:47,566 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 351 flow [2024-06-21 16:38:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:47,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:38:47,567 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 16:38:47,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -748749233, now seen corresponding path program 2 times [2024-06-21 16:38:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839899861] [2024-06-21 16:38:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:48,069 INFO 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 16:38:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839899861] [2024-06-21 16:38:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839899861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:48,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:48,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:38:48,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561895968] [2024-06-21 16:38:48,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:48,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:38:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:38:48,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:38:48,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:48,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 351 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:48,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:48,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:48,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:48,419 INFO L124 PetriNetUnfolderBase]: 1692/2606 cut-off events. [2024-06-21 16:38:48,419 INFO L125 PetriNetUnfolderBase]: For 10116/10136 co-relation queries the response was YES. [2024-06-21 16:38:48,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9612 conditions, 2606 events. 1692/2606 cut-off events. For 10116/10136 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12415 event pairs, 800 based on Foata normal form. 10/2604 useless extension candidates. Maximal degree in co-relation 9587. Up to 2448 conditions per place. [2024-06-21 16:38:48,434 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 16:38:48,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 77 transitions, 559 flow [2024-06-21 16:38:48,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:38:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:38:48,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-21 16:38:48,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-21 16:38:48,436 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 351 flow. Second operand 6 states and 103 transitions. [2024-06-21 16:38:48,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 77 transitions, 559 flow [2024-06-21 16:38:48,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 523 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:48,441 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 391 flow [2024-06-21 16:38:48,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-21 16:38:48,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-21 16:38:48,443 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 391 flow [2024-06-21 16:38:48,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:48,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:48,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:38:48,444 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 16:38:48,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash -748741297, now seen corresponding path program 1 times [2024-06-21 16:38:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:48,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857156876] [2024-06-21 16:38:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:48,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:49,120 INFO 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 16:38:49,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:49,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857156876] [2024-06-21 16:38:49,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857156876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:49,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:49,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:49,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290385728] [2024-06-21 16:38:49,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:49,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:49,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:49,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:49,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:49,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:49,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:49,558 INFO L124 PetriNetUnfolderBase]: 1637/2542 cut-off events. [2024-06-21 16:38:49,559 INFO L125 PetriNetUnfolderBase]: For 12161/12161 co-relation queries the response was YES. [2024-06-21 16:38:49,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 2542 events. 1637/2542 cut-off events. For 12161/12161 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12168 event pairs, 755 based on Foata normal form. 3/2545 useless extension candidates. Maximal degree in co-relation 9873. Up to 2381 conditions per place. [2024-06-21 16:38:49,572 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 62 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-21 16:38:49,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 673 flow [2024-06-21 16:38:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:49,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:49,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 16:38:49,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 16:38:49,574 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 391 flow. Second operand 7 states and 123 transitions. [2024-06-21 16:38:49,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 673 flow [2024-06-21 16:38:49,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 621 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:49,580 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 430 flow [2024-06-21 16:38:49,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 16:38:49,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-21 16:38:49,581 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 430 flow [2024-06-21 16:38:49,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:49,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:49,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:49,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:38:49,582 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 16:38:49,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:49,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1671858883, now seen corresponding path program 1 times [2024-06-21 16:38:49,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:49,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136659352] [2024-06-21 16:38:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:49,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:50,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:50,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136659352] [2024-06-21 16:38:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136659352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:50,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:50,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:50,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567319557] [2024-06-21 16:38:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:50,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:50,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:50,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 430 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:50,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:50,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:50,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:50,590 INFO L124 PetriNetUnfolderBase]: 1756/2679 cut-off events. [2024-06-21 16:38:50,591 INFO L125 PetriNetUnfolderBase]: For 16886/16905 co-relation queries the response was YES. [2024-06-21 16:38:50,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11333 conditions, 2679 events. 1756/2679 cut-off events. For 16886/16905 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12552 event pairs, 680 based on Foata normal form. 5/2678 useless extension candidates. Maximal degree in co-relation 11306. Up to 2493 conditions per place. [2024-06-21 16:38:50,605 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 73 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-21 16:38:50,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 720 flow [2024-06-21 16:38:50,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:50,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:38:50,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 16:38:50,607 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 430 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:38:50,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 720 flow [2024-06-21 16:38:50,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 659 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:50,615 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 467 flow [2024-06-21 16:38:50,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-21 16:38:50,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-21 16:38:50,616 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 467 flow [2024-06-21 16:38:50,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:50,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:50,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:50,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:38:50,616 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 16:38:50,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1911736509, now seen corresponding path program 2 times [2024-06-21 16:38:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:50,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427279950] [2024-06-21 16:38:50,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:50,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:51,199 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 16:38:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427279950] [2024-06-21 16:38:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427279950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:51,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:51,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:51,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127027246] [2024-06-21 16:38:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:51,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:51,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:51,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:51,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:51,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:51,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:51,705 INFO L124 PetriNetUnfolderBase]: 1794/2730 cut-off events. [2024-06-21 16:38:51,705 INFO L125 PetriNetUnfolderBase]: For 21166/21197 co-relation queries the response was YES. [2024-06-21 16:38:51,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12349 conditions, 2730 events. 1794/2730 cut-off events. For 21166/21197 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12791 event pairs, 667 based on Foata normal form. 5/2723 useless extension candidates. Maximal degree in co-relation 12320. Up to 2510 conditions per place. [2024-06-21 16:38:51,718 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 24 changer transitions 0/104 dead transitions. [2024-06-21 16:38:51,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 104 transitions, 847 flow [2024-06-21 16:38:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 16:38:51,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:38:51,720 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 467 flow. Second operand 7 states and 126 transitions. [2024-06-21 16:38:51,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 104 transitions, 847 flow [2024-06-21 16:38:51,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 104 transitions, 801 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:51,728 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 563 flow [2024-06-21 16:38:51,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-21 16:38:51,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-21 16:38:51,729 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 563 flow [2024-06-21 16:38:51,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:51,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:51,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:38:51,729 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 16:38:51,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1911736323, now seen corresponding path program 1 times [2024-06-21 16:38:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:51,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257478039] [2024-06-21 16:38:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:52,258 INFO 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 16:38:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:52,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257478039] [2024-06-21 16:38:52,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257478039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:52,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:52,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:52,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512392788] [2024-06-21 16:38:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:52,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:38:52,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 563 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:52,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:52,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:38:52,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:52,760 INFO L124 PetriNetUnfolderBase]: 1983/2938 cut-off events. [2024-06-21 16:38:52,760 INFO L125 PetriNetUnfolderBase]: For 25807/25807 co-relation queries the response was YES. [2024-06-21 16:38:52,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13919 conditions, 2938 events. 1983/2938 cut-off events. For 25807/25807 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13322 event pairs, 691 based on Foata normal form. 3/2941 useless extension candidates. Maximal degree in co-relation 13889. Up to 2867 conditions per place. [2024-06-21 16:38:52,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 89 selfloop transitions, 22 changer transitions 0/114 dead transitions. [2024-06-21 16:38:52,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 114 transitions, 1013 flow [2024-06-21 16:38:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:52,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 16:38:52,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-21 16:38:52,779 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 563 flow. Second operand 7 states and 121 transitions. [2024-06-21 16:38:52,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 114 transitions, 1013 flow [2024-06-21 16:38:52,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 114 transitions, 963 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:38:52,797 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 695 flow [2024-06-21 16:38:52,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=695, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2024-06-21 16:38:52,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-21 16:38:52,797 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 695 flow [2024-06-21 16:38:52,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:52,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:52,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:52,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:38:52,798 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 16:38:52,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:52,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1734604989, now seen corresponding path program 3 times [2024-06-21 16:38:52,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:52,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30945994] [2024-06-21 16:38:52,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:52,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:53,324 INFO 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 16:38:53,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:53,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30945994] [2024-06-21 16:38:53,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30945994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:53,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:53,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:53,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547167196] [2024-06-21 16:38:53,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:53,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:53,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:53,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:53,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 695 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:53,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:53,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:53,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:53,772 INFO L124 PetriNetUnfolderBase]: 1842/2797 cut-off events. [2024-06-21 16:38:53,772 INFO L125 PetriNetUnfolderBase]: For 31077/31104 co-relation queries the response was YES. [2024-06-21 16:38:53,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14157 conditions, 2797 events. 1842/2797 cut-off events. For 31077/31104 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13082 event pairs, 663 based on Foata normal form. 9/2800 useless extension candidates. Maximal degree in co-relation 14123. Up to 2523 conditions per place. [2024-06-21 16:38:53,790 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 31 changer transitions 0/115 dead transitions. [2024-06-21 16:38:53,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 115 transitions, 1061 flow [2024-06-21 16:38:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:53,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 16:38:53,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-21 16:38:53,791 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 695 flow. Second operand 7 states and 125 transitions. [2024-06-21 16:38:53,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 115 transitions, 1061 flow [2024-06-21 16:38:53,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 115 transitions, 1009 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-21 16:38:53,811 INFO L231 Difference]: Finished difference. Result has 84 places, 92 transitions, 769 flow [2024-06-21 16:38:53,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=84, PETRI_TRANSITIONS=92} [2024-06-21 16:38:53,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-21 16:38:53,812 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 92 transitions, 769 flow [2024-06-21 16:38:53,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:53,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:53,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:53,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:38:53,812 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 16:38:53,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2092205119, now seen corresponding path program 2 times [2024-06-21 16:38:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123393157] [2024-06-21 16:38:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:54,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:54,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123393157] [2024-06-21 16:38:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123393157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:54,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:54,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362863326] [2024-06-21 16:38:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:54,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:54,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:54,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:54,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:38:54,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 92 transitions, 769 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:54,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:54,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:38:54,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:54,781 INFO L124 PetriNetUnfolderBase]: 1991/2952 cut-off events. [2024-06-21 16:38:54,782 INFO L125 PetriNetUnfolderBase]: For 35763/35775 co-relation queries the response was YES. [2024-06-21 16:38:54,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15608 conditions, 2952 events. 1991/2952 cut-off events. For 35763/35775 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13432 event pairs, 684 based on Foata normal form. 15/2967 useless extension candidates. Maximal degree in co-relation 15572. Up to 2793 conditions per place. [2024-06-21 16:38:54,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 87 selfloop transitions, 34 changer transitions 0/124 dead transitions. [2024-06-21 16:38:54,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 1293 flow [2024-06-21 16:38:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:38:54,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 16:38:54,799 INFO L175 Difference]: Start difference. First operand has 84 places, 92 transitions, 769 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:38:54,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 1293 flow [2024-06-21 16:38:54,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1191 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:38:54,819 INFO L231 Difference]: Finished difference. Result has 87 places, 100 transitions, 859 flow [2024-06-21 16:38:54,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=859, PETRI_PLACES=87, PETRI_TRANSITIONS=100} [2024-06-21 16:38:54,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-21 16:38:54,820 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 100 transitions, 859 flow [2024-06-21 16:38:54,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:54,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:54,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:38:54,821 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1736151591, now seen corresponding path program 3 times [2024-06-21 16:38:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:54,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921469168] [2024-06-21 16:38:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:55,325 INFO 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 16:38:55,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:55,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921469168] [2024-06-21 16:38:55,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921469168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:55,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:55,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:38:55,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212253948] [2024-06-21 16:38:55,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:55,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:38:55,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:38:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:38:55,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:38:55,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 100 transitions, 859 flow. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:55,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:55,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:38:55,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:55,757 INFO L124 PetriNetUnfolderBase]: 1993/2955 cut-off events. [2024-06-21 16:38:55,757 INFO L125 PetriNetUnfolderBase]: For 41047/41059 co-relation queries the response was YES. [2024-06-21 16:38:55,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16363 conditions, 2955 events. 1993/2955 cut-off events. For 41047/41059 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13432 event pairs, 684 based on Foata normal form. 15/2970 useless extension candidates. Maximal degree in co-relation 16325. Up to 2798 conditions per place. [2024-06-21 16:38:55,777 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 80 selfloop transitions, 42 changer transitions 0/125 dead transitions. [2024-06-21 16:38:55,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1274 flow [2024-06-21 16:38:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 16:38:55,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-21 16:38:55,778 INFO L175 Difference]: Start difference. First operand has 87 places, 100 transitions, 859 flow. Second operand 7 states and 120 transitions. [2024-06-21 16:38:55,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1274 flow [2024-06-21 16:38:55,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1157 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:55,805 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 900 flow [2024-06-21 16:38:55,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2024-06-21 16:38:55,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-21 16:38:55,805 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 900 flow [2024-06-21 16:38:55,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:55,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:55,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:55,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:38:55,806 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 16:38:55,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:55,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1736142663, now seen corresponding path program 1 times [2024-06-21 16:38:55,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:55,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182720580] [2024-06-21 16:38:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:56,581 INFO 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 16:38:56,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:56,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182720580] [2024-06-21 16:38:56,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182720580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:56,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:56,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:56,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026896534] [2024-06-21 16:38:56,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:56,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:56,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:56,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:56,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:56,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:56,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 900 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:56,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:56,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:56,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:57,091 INFO L124 PetriNetUnfolderBase]: 1744/2703 cut-off events. [2024-06-21 16:38:57,092 INFO L125 PetriNetUnfolderBase]: For 37623/37623 co-relation queries the response was YES. [2024-06-21 16:38:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 2703 events. 1744/2703 cut-off events. For 37623/37623 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12916 event pairs, 560 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 14539. Up to 2510 conditions per place. [2024-06-21 16:38:57,109 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 105 selfloop transitions, 24 changer transitions 0/133 dead transitions. [2024-06-21 16:38:57,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 133 transitions, 1332 flow [2024-06-21 16:38:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:38:57,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:38:57,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:38:57,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 16:38:57,111 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 900 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:38:57,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 133 transitions, 1332 flow [2024-06-21 16:38:57,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 133 transitions, 1241 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:57,138 INFO L231 Difference]: Finished difference. Result has 94 places, 107 transitions, 921 flow [2024-06-21 16:38:57,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=94, PETRI_TRANSITIONS=107} [2024-06-21 16:38:57,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-21 16:38:57,140 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 107 transitions, 921 flow [2024-06-21 16:38:57,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:57,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:57,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:57,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:38:57,144 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:38:57,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:57,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2061105833, now seen corresponding path program 1 times [2024-06-21 16:38:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819455739] [2024-06-21 16:38:57,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:57,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:57,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:38:57,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819455739] [2024-06-21 16:38:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819455739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:57,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:57,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:38:57,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676175370] [2024-06-21 16:38:57,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:38:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:38:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:38:57,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:57,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 107 transitions, 921 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:57,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:57,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:57,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:57,931 INFO L124 PetriNetUnfolderBase]: 1741/2698 cut-off events. [2024-06-21 16:38:57,931 INFO L125 PetriNetUnfolderBase]: For 40522/40522 co-relation queries the response was YES. [2024-06-21 16:38:57,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14927 conditions, 2698 events. 1741/2698 cut-off events. For 40522/40522 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12871 event pairs, 579 based on Foata normal form. 1/2699 useless extension candidates. Maximal degree in co-relation 14887. Up to 2579 conditions per place. [2024-06-21 16:38:57,946 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 103 selfloop transitions, 8 changer transitions 0/115 dead transitions. [2024-06-21 16:38:57,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 115 transitions, 1163 flow [2024-06-21 16:38:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:38:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:38:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 82 transitions. [2024-06-21 16:38:57,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 16:38:57,948 INFO L175 Difference]: Start difference. First operand has 94 places, 107 transitions, 921 flow. Second operand 5 states and 82 transitions. [2024-06-21 16:38:57,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 115 transitions, 1163 flow [2024-06-21 16:38:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 1065 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:38:57,972 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 845 flow [2024-06-21 16:38:57,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=845, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2024-06-21 16:38:57,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-21 16:38:57,973 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 845 flow [2024-06-21 16:38:57,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:57,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:57,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:57,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:38:57,974 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 16:38:57,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:57,974 INFO L85 PathProgramCache]: Analyzing trace with hash 861901932, now seen corresponding path program 1 times [2024-06-21 16:38:57,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:57,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023119754] [2024-06-21 16:38:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:57,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:58,707 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 16:38:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:58,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023119754] [2024-06-21 16:38:58,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023119754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:58,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:58,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:58,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803697526] [2024-06-21 16:38:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:58,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:58,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:58,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:38:58,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 845 flow. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:58,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:58,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:38:58,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:38:59,295 INFO L124 PetriNetUnfolderBase]: 1855/2814 cut-off events. [2024-06-21 16:38:59,296 INFO L125 PetriNetUnfolderBase]: For 49865/49867 co-relation queries the response was YES. [2024-06-21 16:38:59,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15941 conditions, 2814 events. 1855/2814 cut-off events. For 49865/49867 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13166 event pairs, 637 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 15900. Up to 2601 conditions per place. [2024-06-21 16:38:59,310 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 19 changer transitions 0/133 dead transitions. [2024-06-21 16:38:59,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 133 transitions, 1149 flow [2024-06-21 16:38:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:38:59,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:38:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-21 16:38:59,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-21 16:38:59,312 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 845 flow. Second operand 7 states and 124 transitions. [2024-06-21 16:38:59,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 133 transitions, 1149 flow [2024-06-21 16:38:59,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 133 transitions, 1105 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:38:59,337 INFO L231 Difference]: Finished difference. Result has 96 places, 107 transitions, 851 flow [2024-06-21 16:38:59,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=107} [2024-06-21 16:38:59,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-21 16:38:59,338 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 107 transitions, 851 flow [2024-06-21 16:38:59,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 9 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:59,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:38:59,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:38:59,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:38:59,338 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 16:38:59,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:38:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash 861992297, now seen corresponding path program 1 times [2024-06-21 16:38:59,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:38:59,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422548838] [2024-06-21 16:38:59,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:38:59,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:38:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:38:59,890 INFO 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 16:38:59,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:38:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422548838] [2024-06-21 16:38:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422548838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:38:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:38:59,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:38:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833935344] [2024-06-21 16:38:59,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:38:59,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:38:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:38:59,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:38:59,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:38:59,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:38:59,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 107 transitions, 851 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:38:59,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:38:59,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:38:59,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:00,485 INFO L124 PetriNetUnfolderBase]: 2056/3043 cut-off events. [2024-06-21 16:39:00,485 INFO L125 PetriNetUnfolderBase]: For 56158/56158 co-relation queries the response was YES. [2024-06-21 16:39:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17519 conditions, 3043 events. 2056/3043 cut-off events. For 56158/56158 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13811 event pairs, 663 based on Foata normal form. 6/3049 useless extension candidates. Maximal degree in co-relation 17478. Up to 2886 conditions per place. [2024-06-21 16:39:00,503 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 120 selfloop transitions, 32 changer transitions 0/155 dead transitions. [2024-06-21 16:39:00,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 155 transitions, 1519 flow [2024-06-21 16:39:00,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:00,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:00,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:39:00,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:39:00,504 INFO L175 Difference]: Start difference. First operand has 96 places, 107 transitions, 851 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:39:00,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 155 transitions, 1519 flow [2024-06-21 16:39:00,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 155 transitions, 1473 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:00,532 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1077 flow [2024-06-21 16:39:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1077, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-21 16:39:00,533 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-21 16:39:00,533 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1077 flow [2024-06-21 16:39:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:00,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:00,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:00,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:39:00,533 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 16:39:00,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 865711367, now seen corresponding path program 2 times [2024-06-21 16:39:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:00,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52930286] [2024-06-21 16:39:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:00,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:01,080 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 16:39:01,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:01,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52930286] [2024-06-21 16:39:01,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52930286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:01,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:01,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:01,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786213998] [2024-06-21 16:39:01,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:01,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:01,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:01,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:01,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:01,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:01,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1077 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:01,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:01,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:01,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:01,715 INFO L124 PetriNetUnfolderBase]: 2308/3400 cut-off events. [2024-06-21 16:39:01,715 INFO L125 PetriNetUnfolderBase]: For 73486/73486 co-relation queries the response was YES. [2024-06-21 16:39:01,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21319 conditions, 3400 events. 2308/3400 cut-off events. For 73486/73486 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15688 event pairs, 629 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 21275. Up to 2898 conditions per place. [2024-06-21 16:39:01,733 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 125 selfloop transitions, 44 changer transitions 0/172 dead transitions. [2024-06-21 16:39:01,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 172 transitions, 1961 flow [2024-06-21 16:39:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:01,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:39:01,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 16:39:01,734 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1077 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:39:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 172 transitions, 1961 flow [2024-06-21 16:39:01,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 172 transitions, 1857 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:01,784 INFO L231 Difference]: Finished difference. Result has 107 places, 134 transitions, 1292 flow [2024-06-21 16:39:01,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1292, PETRI_PLACES=107, PETRI_TRANSITIONS=134} [2024-06-21 16:39:01,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-21 16:39:01,785 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 134 transitions, 1292 flow [2024-06-21 16:39:01,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:01,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:01,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:01,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:39:01,785 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 16:39:01,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:01,785 INFO L85 PathProgramCache]: Analyzing trace with hash 291743690, now seen corresponding path program 1 times [2024-06-21 16:39:01,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:01,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186832668] [2024-06-21 16:39:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:01,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186832668] [2024-06-21 16:39:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186832668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:02,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:02,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:02,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998224126] [2024-06-21 16:39:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:02,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:02,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:02,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:02,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 134 transitions, 1292 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:02,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:02,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:02,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:03,177 INFO L124 PetriNetUnfolderBase]: 2310/3403 cut-off events. [2024-06-21 16:39:03,177 INFO L125 PetriNetUnfolderBase]: For 79890/79890 co-relation queries the response was YES. [2024-06-21 16:39:03,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22550 conditions, 3403 events. 2310/3403 cut-off events. For 79890/79890 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15648 event pairs, 697 based on Foata normal form. 3/3406 useless extension candidates. Maximal degree in co-relation 22503. Up to 3321 conditions per place. [2024-06-21 16:39:03,205 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 26 changer transitions 0/166 dead transitions. [2024-06-21 16:39:03,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 166 transitions, 1842 flow [2024-06-21 16:39:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:03,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:39:03,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:39:03,207 INFO L175 Difference]: Start difference. First operand has 107 places, 134 transitions, 1292 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:39:03,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 166 transitions, 1842 flow [2024-06-21 16:39:03,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 166 transitions, 1739 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:03,262 INFO L231 Difference]: Finished difference. Result has 112 places, 138 transitions, 1332 flow [2024-06-21 16:39:03,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1189, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1332, PETRI_PLACES=112, PETRI_TRANSITIONS=138} [2024-06-21 16:39:03,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-21 16:39:03,263 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 138 transitions, 1332 flow [2024-06-21 16:39:03,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:03,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:03,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:03,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:39:03,263 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 16:39:03,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:03,263 INFO L85 PathProgramCache]: Analyzing trace with hash 865716947, now seen corresponding path program 3 times [2024-06-21 16:39:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:03,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662429181] [2024-06-21 16:39:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:03,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:03,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662429181] [2024-06-21 16:39:03,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662429181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:03,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:03,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:03,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779291942] [2024-06-21 16:39:03,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:03,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:03,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:03,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:03,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 138 transitions, 1332 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:03,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:03,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:03,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:04,384 INFO L124 PetriNetUnfolderBase]: 2342/3448 cut-off events. [2024-06-21 16:39:04,385 INFO L125 PetriNetUnfolderBase]: For 85978/85978 co-relation queries the response was YES. [2024-06-21 16:39:04,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22881 conditions, 3448 events. 2342/3448 cut-off events. For 85978/85978 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15873 event pairs, 644 based on Foata normal form. 12/3460 useless extension candidates. Maximal degree in co-relation 22832. Up to 2939 conditions per place. [2024-06-21 16:39:04,404 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 120 selfloop transitions, 60 changer transitions 0/183 dead transitions. [2024-06-21 16:39:04,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 2148 flow [2024-06-21 16:39:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:04,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:39:04,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 16:39:04,405 INFO L175 Difference]: Start difference. First operand has 112 places, 138 transitions, 1332 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:39:04,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 2148 flow [2024-06-21 16:39:04,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 183 transitions, 2045 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:04,457 INFO L231 Difference]: Finished difference. Result has 115 places, 148 transitions, 1578 flow [2024-06-21 16:39:04,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1578, PETRI_PLACES=115, PETRI_TRANSITIONS=148} [2024-06-21 16:39:04,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-21 16:39:04,457 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 148 transitions, 1578 flow [2024-06-21 16:39:04,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:04,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:04,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:04,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:39:04,457 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 16:39:04,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:04,458 INFO L85 PathProgramCache]: Analyzing trace with hash 434051875, now seen corresponding path program 4 times [2024-06-21 16:39:04,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:04,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886579462] [2024-06-21 16:39:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:04,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:05,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:05,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886579462] [2024-06-21 16:39:05,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886579462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:05,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:05,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:05,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525712542] [2024-06-21 16:39:05,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:05,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:05,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 148 transitions, 1578 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:05,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:05,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:05,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:05,610 INFO L124 PetriNetUnfolderBase]: 2532/3724 cut-off events. [2024-06-21 16:39:05,610 INFO L125 PetriNetUnfolderBase]: For 105098/105104 co-relation queries the response was YES. [2024-06-21 16:39:05,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25783 conditions, 3724 events. 2532/3724 cut-off events. For 105098/105104 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17468 event pairs, 617 based on Foata normal form. 16/3740 useless extension candidates. Maximal degree in co-relation 25732. Up to 2763 conditions per place. [2024-06-21 16:39:05,632 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 108 selfloop transitions, 93 changer transitions 0/204 dead transitions. [2024-06-21 16:39:05,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 204 transitions, 2698 flow [2024-06-21 16:39:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:39:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:39:05,638 INFO L175 Difference]: Start difference. First operand has 115 places, 148 transitions, 1578 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:39:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 204 transitions, 2698 flow [2024-06-21 16:39:05,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 204 transitions, 2609 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:05,736 INFO L231 Difference]: Finished difference. Result has 122 places, 166 transitions, 2076 flow [2024-06-21 16:39:05,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2076, PETRI_PLACES=122, PETRI_TRANSITIONS=166} [2024-06-21 16:39:05,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-21 16:39:05,736 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 166 transitions, 2076 flow [2024-06-21 16:39:05,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:05,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:05,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:05,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:39:05,737 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 16:39:05,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:05,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2013876560, now seen corresponding path program 2 times [2024-06-21 16:39:05,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:05,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984417605] [2024-06-21 16:39:05,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:05,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:06,522 INFO 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 16:39:06,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:06,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984417605] [2024-06-21 16:39:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984417605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:06,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:06,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825402080] [2024-06-21 16:39:06,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:06,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:06,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 166 transitions, 2076 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:06,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:06,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:06,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:07,219 INFO L124 PetriNetUnfolderBase]: 2538/3734 cut-off events. [2024-06-21 16:39:07,219 INFO L125 PetriNetUnfolderBase]: For 111594/111600 co-relation queries the response was YES. [2024-06-21 16:39:07,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27369 conditions, 3734 events. 2538/3734 cut-off events. For 111594/111600 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17459 event pairs, 623 based on Foata normal form. 13/3747 useless extension candidates. Maximal degree in co-relation 27314. Up to 3134 conditions per place. [2024-06-21 16:39:07,245 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 126 selfloop transitions, 92 changer transitions 0/221 dead transitions. [2024-06-21 16:39:07,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 221 transitions, 3272 flow [2024-06-21 16:39:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:07,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 16:39:07,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-21 16:39:07,246 INFO L175 Difference]: Start difference. First operand has 122 places, 166 transitions, 2076 flow. Second operand 8 states and 147 transitions. [2024-06-21 16:39:07,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 221 transitions, 3272 flow [2024-06-21 16:39:07,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 221 transitions, 3059 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-21 16:39:07,352 INFO L231 Difference]: Finished difference. Result has 131 places, 190 transitions, 2704 flow [2024-06-21 16:39:07,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2704, PETRI_PLACES=131, PETRI_TRANSITIONS=190} [2024-06-21 16:39:07,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-21 16:39:07,353 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 190 transitions, 2704 flow [2024-06-21 16:39:07,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:07,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:07,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:07,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:39:07,353 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 16:39:07,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:07,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2014143470, now seen corresponding path program 3 times [2024-06-21 16:39:07,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:07,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290640488] [2024-06-21 16:39:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:07,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:08,163 INFO 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 16:39:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290640488] [2024-06-21 16:39:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290640488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:08,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:08,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:08,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701071201] [2024-06-21 16:39:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:08,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:08,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:08,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 190 transitions, 2704 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:08,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:08,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:08,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:09,042 INFO L124 PetriNetUnfolderBase]: 2526/3713 cut-off events. [2024-06-21 16:39:09,042 INFO L125 PetriNetUnfolderBase]: For 110868/110882 co-relation queries the response was YES. [2024-06-21 16:39:09,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27658 conditions, 3713 events. 2526/3713 cut-off events. For 110868/110882 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17315 event pairs, 667 based on Foata normal form. 17/3730 useless extension candidates. Maximal degree in co-relation 27598. Up to 3491 conditions per place. [2024-06-21 16:39:09,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 163 selfloop transitions, 62 changer transitions 0/228 dead transitions. [2024-06-21 16:39:09,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 228 transitions, 3574 flow [2024-06-21 16:39:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:39:09,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:39:09,068 INFO L175 Difference]: Start difference. First operand has 131 places, 190 transitions, 2704 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:39:09,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 228 transitions, 3574 flow [2024-06-21 16:39:09,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 228 transitions, 3409 flow, removed 74 selfloop flow, removed 2 redundant places. [2024-06-21 16:39:09,177 INFO L231 Difference]: Finished difference. Result has 139 places, 197 transitions, 2860 flow [2024-06-21 16:39:09,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2860, PETRI_PLACES=139, PETRI_TRANSITIONS=197} [2024-06-21 16:39:09,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-21 16:39:09,178 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 197 transitions, 2860 flow [2024-06-21 16:39:09,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:09,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:09,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:09,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:39:09,178 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:09,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:09,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2006524693, now seen corresponding path program 5 times [2024-06-21 16:39:09,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:09,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729910183] [2024-06-21 16:39:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:09,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:09,773 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 16:39:09,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:09,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729910183] [2024-06-21 16:39:09,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729910183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:09,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:09,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:09,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314569481] [2024-06-21 16:39:09,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:09,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:09,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:09,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:09,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:09,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 197 transitions, 2860 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:09,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:09,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:09,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:10,540 INFO L124 PetriNetUnfolderBase]: 2604/3830 cut-off events. [2024-06-21 16:39:10,540 INFO L125 PetriNetUnfolderBase]: For 124253/124259 co-relation queries the response was YES. [2024-06-21 16:39:10,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29168 conditions, 3830 events. 2604/3830 cut-off events. For 124253/124259 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17964 event pairs, 642 based on Foata normal form. 16/3846 useless extension candidates. Maximal degree in co-relation 29105. Up to 2810 conditions per place. [2024-06-21 16:39:10,567 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 135 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-21 16:39:10,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 244 transitions, 4007 flow [2024-06-21 16:39:10,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:10,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:10,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-21 16:39:10,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:39:10,568 INFO L175 Difference]: Start difference. First operand has 139 places, 197 transitions, 2860 flow. Second operand 8 states and 152 transitions. [2024-06-21 16:39:10,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 244 transitions, 4007 flow [2024-06-21 16:39:10,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 244 transitions, 3870 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:10,686 INFO L231 Difference]: Finished difference. Result has 141 places, 208 transitions, 3238 flow [2024-06-21 16:39:10,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2723, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3238, PETRI_PLACES=141, PETRI_TRANSITIONS=208} [2024-06-21 16:39:10,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-21 16:39:10,686 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 208 transitions, 3238 flow [2024-06-21 16:39:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:10,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:10,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:10,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:39:10,687 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 16:39:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2061826988, now seen corresponding path program 4 times [2024-06-21 16:39:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410983777] [2024-06-21 16:39:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:11,374 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 16:39:11,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:11,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410983777] [2024-06-21 16:39:11,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410983777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:11,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:11,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:11,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794787679] [2024-06-21 16:39:11,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:11,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:11,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:11,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:11,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:11,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:11,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 208 transitions, 3238 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:11,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:11,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:11,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:12,040 INFO L124 PetriNetUnfolderBase]: 2586/3806 cut-off events. [2024-06-21 16:39:12,040 INFO L125 PetriNetUnfolderBase]: For 129634/129640 co-relation queries the response was YES. [2024-06-21 16:39:12,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29904 conditions, 3806 events. 2586/3806 cut-off events. For 129634/129640 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17896 event pairs, 633 based on Foata normal form. 13/3819 useless extension candidates. Maximal degree in co-relation 29839. Up to 3162 conditions per place. [2024-06-21 16:39:12,070 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 155 selfloop transitions, 85 changer transitions 0/243 dead transitions. [2024-06-21 16:39:12,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 243 transitions, 4148 flow [2024-06-21 16:39:12,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:39:12,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-21 16:39:12,071 INFO L175 Difference]: Start difference. First operand has 141 places, 208 transitions, 3238 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:39:12,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 243 transitions, 4148 flow [2024-06-21 16:39:12,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 3674 flow, removed 112 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:12,222 INFO L231 Difference]: Finished difference. Result has 142 places, 210 transitions, 2985 flow [2024-06-21 16:39:12,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2985, PETRI_PLACES=142, PETRI_TRANSITIONS=210} [2024-06-21 16:39:12,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-21 16:39:12,222 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 210 transitions, 2985 flow [2024-06-21 16:39:12,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:12,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:12,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:12,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:39:12,223 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 16:39:12,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:12,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2061821191, now seen corresponding path program 6 times [2024-06-21 16:39:12,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:12,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695683159] [2024-06-21 16:39:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:12,790 INFO 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 16:39:12,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:12,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695683159] [2024-06-21 16:39:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695683159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:12,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:12,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293639181] [2024-06-21 16:39:12,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:12,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:12,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:12,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:12,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:12,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:12,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 210 transitions, 2985 flow. Second operand has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:12,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:12,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:12,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:13,445 INFO L124 PetriNetUnfolderBase]: 2584/3802 cut-off events. [2024-06-21 16:39:13,445 INFO L125 PetriNetUnfolderBase]: For 129735/129741 co-relation queries the response was YES. [2024-06-21 16:39:13,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28843 conditions, 3802 events. 2584/3802 cut-off events. For 129735/129741 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17832 event pairs, 634 based on Foata normal form. 10/3812 useless extension candidates. Maximal degree in co-relation 28780. Up to 2809 conditions per place. [2024-06-21 16:39:13,470 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 132 selfloop transitions, 111 changer transitions 0/246 dead transitions. [2024-06-21 16:39:13,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 246 transitions, 3881 flow [2024-06-21 16:39:13,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:13,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:13,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:39:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-21 16:39:13,478 INFO L175 Difference]: Start difference. First operand has 142 places, 210 transitions, 2985 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:39:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 246 transitions, 3881 flow [2024-06-21 16:39:13,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 3657 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:13,616 INFO L231 Difference]: Finished difference. Result has 148 places, 214 transitions, 3088 flow [2024-06-21 16:39:13,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3088, PETRI_PLACES=148, PETRI_TRANSITIONS=214} [2024-06-21 16:39:13,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-21 16:39:13,617 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 214 transitions, 3088 flow [2024-06-21 16:39:13,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.333333333333334) internal successors, (75), 9 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:13,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:13,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:13,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:39:13,617 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:13,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash -530226919, now seen corresponding path program 1 times [2024-06-21 16:39:13,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:13,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684939859] [2024-06-21 16:39:13,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:13,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:14,044 INFO 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 16:39:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684939859] [2024-06-21 16:39:14,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684939859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:14,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:14,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:14,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051457950] [2024-06-21 16:39:14,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:14,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:14,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:14,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:14,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 214 transitions, 3088 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:14,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:14,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:14,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:14,759 INFO L124 PetriNetUnfolderBase]: 2326/3532 cut-off events. [2024-06-21 16:39:14,759 INFO L125 PetriNetUnfolderBase]: For 118433/118433 co-relation queries the response was YES. [2024-06-21 16:39:14,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26812 conditions, 3532 events. 2326/3532 cut-off events. For 118433/118433 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17097 event pairs, 563 based on Foata normal form. 2/3534 useless extension candidates. Maximal degree in co-relation 26747. Up to 3408 conditions per place. [2024-06-21 16:39:14,791 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 212 selfloop transitions, 11 changer transitions 0/227 dead transitions. [2024-06-21 16:39:14,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 3586 flow [2024-06-21 16:39:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:14,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-21 16:39:14,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-21 16:39:14,792 INFO L175 Difference]: Start difference. First operand has 148 places, 214 transitions, 3088 flow. Second operand 6 states and 95 transitions. [2024-06-21 16:39:14,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 227 transitions, 3586 flow [2024-06-21 16:39:14,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 227 transitions, 3384 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:14,918 INFO L231 Difference]: Finished difference. Result has 149 places, 217 transitions, 2948 flow [2024-06-21 16:39:14,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2948, PETRI_PLACES=149, PETRI_TRANSITIONS=217} [2024-06-21 16:39:14,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-21 16:39:14,919 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 217 transitions, 2948 flow [2024-06-21 16:39:14,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:14,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:14,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:14,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:39:14,920 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 16:39:14,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:14,920 INFO L85 PathProgramCache]: Analyzing trace with hash 949096544, now seen corresponding path program 1 times [2024-06-21 16:39:14,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:14,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058326899] [2024-06-21 16:39:14,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:14,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:15,641 INFO 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 16:39:15,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:15,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058326899] [2024-06-21 16:39:15,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058326899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:15,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:15,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:15,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547683431] [2024-06-21 16:39:15,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:15,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:15,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:15,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 217 transitions, 2948 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:15,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:15,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:15,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:16,419 INFO L124 PetriNetUnfolderBase]: 2478/3697 cut-off events. [2024-06-21 16:39:16,419 INFO L125 PetriNetUnfolderBase]: For 140952/140959 co-relation queries the response was YES. [2024-06-21 16:39:16,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28456 conditions, 3697 events. 2478/3697 cut-off events. For 140952/140959 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17816 event pairs, 449 based on Foata normal form. 11/3708 useless extension candidates. Maximal degree in co-relation 28390. Up to 3338 conditions per place. [2024-06-21 16:39:16,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 17 changer transitions 0/250 dead transitions. [2024-06-21 16:39:16,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 250 transitions, 3502 flow [2024-06-21 16:39:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:16,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:16,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:39:16,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 16:39:16,449 INFO L175 Difference]: Start difference. First operand has 149 places, 217 transitions, 2948 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:39:16,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 250 transitions, 3502 flow [2024-06-21 16:39:16,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 250 transitions, 3462 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:16,572 INFO L231 Difference]: Finished difference. Result has 153 places, 219 transitions, 3015 flow [2024-06-21 16:39:16,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3015, PETRI_PLACES=153, PETRI_TRANSITIONS=219} [2024-06-21 16:39:16,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-21 16:39:16,573 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 219 transitions, 3015 flow [2024-06-21 16:39:16,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:16,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:16,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:16,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:39:16,574 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 16:39:16,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 335848484, now seen corresponding path program 2 times [2024-06-21 16:39:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169334401] [2024-06-21 16:39:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:16,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:17,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:17,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169334401] [2024-06-21 16:39:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169334401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:17,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:17,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117731977] [2024-06-21 16:39:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:17,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:17,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:17,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:17,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 219 transitions, 3015 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:17,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:17,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:17,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:18,161 INFO L124 PetriNetUnfolderBase]: 2495/3724 cut-off events. [2024-06-21 16:39:18,162 INFO L125 PetriNetUnfolderBase]: For 151002/151009 co-relation queries the response was YES. [2024-06-21 16:39:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29116 conditions, 3724 events. 2495/3724 cut-off events. For 151002/151009 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17969 event pairs, 558 based on Foata normal form. 11/3735 useless extension candidates. Maximal degree in co-relation 29049. Up to 3368 conditions per place. [2024-06-21 16:39:18,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 21 changer transitions 0/252 dead transitions. [2024-06-21 16:39:18,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 252 transitions, 3579 flow [2024-06-21 16:39:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:39:18,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 16:39:18,194 INFO L175 Difference]: Start difference. First operand has 153 places, 219 transitions, 3015 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:39:18,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 252 transitions, 3579 flow [2024-06-21 16:39:18,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 252 transitions, 3490 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:18,353 INFO L231 Difference]: Finished difference. Result has 155 places, 221 transitions, 3046 flow [2024-06-21 16:39:18,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=155, PETRI_TRANSITIONS=221} [2024-06-21 16:39:18,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-21 16:39:18,353 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 221 transitions, 3046 flow [2024-06-21 16:39:18,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:18,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:18,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:18,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:39:18,354 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 16:39:18,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:18,354 INFO L85 PathProgramCache]: Analyzing trace with hash 335848608, now seen corresponding path program 1 times [2024-06-21 16:39:18,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:18,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141411248] [2024-06-21 16:39:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:18,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:19,060 INFO 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 16:39:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141411248] [2024-06-21 16:39:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141411248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813751771] [2024-06-21 16:39:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:19,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:19,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 221 transitions, 3046 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:19,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:19,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:19,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:19,877 INFO L124 PetriNetUnfolderBase]: 2603/3831 cut-off events. [2024-06-21 16:39:19,877 INFO L125 PetriNetUnfolderBase]: For 159633/159633 co-relation queries the response was YES. [2024-06-21 16:39:19,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29949 conditions, 3831 events. 2603/3831 cut-off events. For 159633/159633 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18049 event pairs, 586 based on Foata normal form. 3/3834 useless extension candidates. Maximal degree in co-relation 29881. Up to 3641 conditions per place. [2024-06-21 16:39:19,911 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 212 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-21 16:39:19,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 255 transitions, 3824 flow [2024-06-21 16:39:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:19,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-21 16:39:19,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-21 16:39:19,912 INFO L175 Difference]: Start difference. First operand has 155 places, 221 transitions, 3046 flow. Second operand 8 states and 142 transitions. [2024-06-21 16:39:19,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 255 transitions, 3824 flow [2024-06-21 16:39:20,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 255 transitions, 3684 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:20,105 INFO L231 Difference]: Finished difference. Result has 157 places, 221 transitions, 3002 flow [2024-06-21 16:39:20,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2906, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3002, PETRI_PLACES=157, PETRI_TRANSITIONS=221} [2024-06-21 16:39:20,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-21 16:39:20,106 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 221 transitions, 3002 flow [2024-06-21 16:39:20,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:20,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:20,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:20,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:39:20,106 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 16:39:20,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash -707480158, now seen corresponding path program 1 times [2024-06-21 16:39:20,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:20,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652200996] [2024-06-21 16:39:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:20,714 INFO 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 16:39:20,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:20,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652200996] [2024-06-21 16:39:20,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652200996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:20,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:20,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:39:20,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619377976] [2024-06-21 16:39:20,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:20,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:39:20,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:20,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:39:20,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:39:20,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:20,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 221 transitions, 3002 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:20,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:20,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:20,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:21,455 INFO L124 PetriNetUnfolderBase]: 2591/3815 cut-off events. [2024-06-21 16:39:21,455 INFO L125 PetriNetUnfolderBase]: For 165464/165464 co-relation queries the response was YES. [2024-06-21 16:39:21,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29832 conditions, 3815 events. 2591/3815 cut-off events. For 165464/165464 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17944 event pairs, 562 based on Foata normal form. 6/3821 useless extension candidates. Maximal degree in co-relation 29763. Up to 3395 conditions per place. [2024-06-21 16:39:21,486 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 182 selfloop transitions, 67 changer transitions 0/252 dead transitions. [2024-06-21 16:39:21,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 252 transitions, 3710 flow [2024-06-21 16:39:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 16:39:21,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-21 16:39:21,487 INFO L175 Difference]: Start difference. First operand has 157 places, 221 transitions, 3002 flow. Second operand 8 states and 143 transitions. [2024-06-21 16:39:21,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 252 transitions, 3710 flow [2024-06-21 16:39:21,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 252 transitions, 3581 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:21,657 INFO L231 Difference]: Finished difference. Result has 160 places, 221 transitions, 3024 flow [2024-06-21 16:39:21,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3024, PETRI_PLACES=160, PETRI_TRANSITIONS=221} [2024-06-21 16:39:21,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-21 16:39:21,658 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 221 transitions, 3024 flow [2024-06-21 16:39:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:21,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:21,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:39:21,658 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:21,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1067244674, now seen corresponding path program 3 times [2024-06-21 16:39:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249644483] [2024-06-21 16:39:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:21,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:22,383 INFO 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 16:39:22,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:22,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249644483] [2024-06-21 16:39:22,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249644483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:22,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:22,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022574829] [2024-06-21 16:39:22,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:22,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:22,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:22,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:22,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:22,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 221 transitions, 3024 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:22,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:22,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:22,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:23,085 INFO L124 PetriNetUnfolderBase]: 2494/3727 cut-off events. [2024-06-21 16:39:23,085 INFO L125 PetriNetUnfolderBase]: For 175405/175411 co-relation queries the response was YES. [2024-06-21 16:39:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29701 conditions, 3727 events. 2494/3727 cut-off events. For 175405/175411 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18037 event pairs, 532 based on Foata normal form. 10/3737 useless extension candidates. Maximal degree in co-relation 29633. Up to 3349 conditions per place. [2024-06-21 16:39:23,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 26 changer transitions 0/252 dead transitions. [2024-06-21 16:39:23,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 252 transitions, 3588 flow [2024-06-21 16:39:23,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:23,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 16:39:23,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-21 16:39:23,116 INFO L175 Difference]: Start difference. First operand has 160 places, 221 transitions, 3024 flow. Second operand 8 states and 139 transitions. [2024-06-21 16:39:23,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 252 transitions, 3588 flow [2024-06-21 16:39:23,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 252 transitions, 3385 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:23,277 INFO L231 Difference]: Finished difference. Result has 161 places, 223 transitions, 2954 flow [2024-06-21 16:39:23,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2954, PETRI_PLACES=161, PETRI_TRANSITIONS=223} [2024-06-21 16:39:23,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-21 16:39:23,277 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 223 transitions, 2954 flow [2024-06-21 16:39:23,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:23,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:23,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:23,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:39:23,278 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 16:39:23,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:23,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1067429372, now seen corresponding path program 1 times [2024-06-21 16:39:23,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:23,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442660719] [2024-06-21 16:39:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:23,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:24,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:24,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442660719] [2024-06-21 16:39:24,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442660719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:24,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:24,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:24,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20531997] [2024-06-21 16:39:24,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:24,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:24,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:24,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:24,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:24,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 223 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:24,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:24,745 INFO L124 PetriNetUnfolderBase]: 2636/3886 cut-off events. [2024-06-21 16:39:24,745 INFO L125 PetriNetUnfolderBase]: For 187612/187612 co-relation queries the response was YES. [2024-06-21 16:39:24,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30825 conditions, 3886 events. 2636/3886 cut-off events. For 187612/187612 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18411 event pairs, 588 based on Foata normal form. 6/3892 useless extension candidates. Maximal degree in co-relation 30756. Up to 3778 conditions per place. [2024-06-21 16:39:24,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-21 16:39:24,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 259 transitions, 3762 flow [2024-06-21 16:39:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 16:39:24,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-21 16:39:24,778 INFO L175 Difference]: Start difference. First operand has 161 places, 223 transitions, 2954 flow. Second operand 9 states and 150 transitions. [2024-06-21 16:39:24,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 259 transitions, 3762 flow [2024-06-21 16:39:24,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 259 transitions, 3647 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:24,946 INFO L231 Difference]: Finished difference. Result has 164 places, 226 transitions, 2989 flow [2024-06-21 16:39:24,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2989, PETRI_PLACES=164, PETRI_TRANSITIONS=226} [2024-06-21 16:39:24,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-21 16:39:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 226 transitions, 2989 flow [2024-06-21 16:39:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:24,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:24,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:24,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:39:24,947 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:24,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:24,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2001461284, now seen corresponding path program 1 times [2024-06-21 16:39:24,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:24,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118929335] [2024-06-21 16:39:24,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:25,348 INFO 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 16:39:25,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:25,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118929335] [2024-06-21 16:39:25,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118929335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:25,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:25,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:25,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635802127] [2024-06-21 16:39:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:25,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:25,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:25,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 226 transitions, 2989 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:25,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:25,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:26,010 INFO L124 PetriNetUnfolderBase]: 2641/3893 cut-off events. [2024-06-21 16:39:26,010 INFO L125 PetriNetUnfolderBase]: For 192451/192451 co-relation queries the response was YES. [2024-06-21 16:39:26,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31227 conditions, 3893 events. 2641/3893 cut-off events. For 192451/192451 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18448 event pairs, 596 based on Foata normal form. 1/3894 useless extension candidates. Maximal degree in co-relation 31157. Up to 3856 conditions per place. [2024-06-21 16:39:26,045 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 226 selfloop transitions, 16 changer transitions 0/245 dead transitions. [2024-06-21 16:39:26,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 245 transitions, 3642 flow [2024-06-21 16:39:26,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:26,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-21 16:39:26,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-21 16:39:26,046 INFO L175 Difference]: Start difference. First operand has 164 places, 226 transitions, 2989 flow. Second operand 6 states and 98 transitions. [2024-06-21 16:39:26,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 245 transitions, 3642 flow [2024-06-21 16:39:26,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 245 transitions, 3510 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:26,250 INFO L231 Difference]: Finished difference. Result has 163 places, 229 transitions, 2954 flow [2024-06-21 16:39:26,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2954, PETRI_PLACES=163, PETRI_TRANSITIONS=229} [2024-06-21 16:39:26,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-21 16:39:26,251 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 229 transitions, 2954 flow [2024-06-21 16:39:26,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:26,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:26,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:26,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:39:26,252 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 16:39:26,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:26,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2072546432, now seen corresponding path program 4 times [2024-06-21 16:39:26,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:26,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5792527] [2024-06-21 16:39:26,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:26,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5792527] [2024-06-21 16:39:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5792527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272871065] [2024-06-21 16:39:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:27,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:27,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 229 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:27,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:27,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:27,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:27,849 INFO L124 PetriNetUnfolderBase]: 2516/3768 cut-off events. [2024-06-21 16:39:27,850 INFO L125 PetriNetUnfolderBase]: For 200501/200513 co-relation queries the response was YES. [2024-06-21 16:39:27,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30166 conditions, 3768 events. 2516/3768 cut-off events. For 200501/200513 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18349 event pairs, 523 based on Foata normal form. 14/3782 useless extension candidates. Maximal degree in co-relation 30095. Up to 3344 conditions per place. [2024-06-21 16:39:27,877 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 33 changer transitions 0/257 dead transitions. [2024-06-21 16:39:27,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 257 transitions, 3522 flow [2024-06-21 16:39:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:39:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:39:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:39:27,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 16:39:27,878 INFO L175 Difference]: Start difference. First operand has 163 places, 229 transitions, 2954 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:39:27,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 257 transitions, 3522 flow [2024-06-21 16:39:28,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 257 transitions, 3466 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:28,056 INFO L231 Difference]: Finished difference. Result has 166 places, 231 transitions, 3051 flow [2024-06-21 16:39:28,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3051, PETRI_PLACES=166, PETRI_TRANSITIONS=231} [2024-06-21 16:39:28,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-21 16:39:28,057 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 231 transitions, 3051 flow [2024-06-21 16:39:28,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.3) internal successors, (93), 10 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:28,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:28,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:28,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:39:28,058 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 16:39:28,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:28,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2072731130, now seen corresponding path program 2 times [2024-06-21 16:39:28,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:28,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006247271] [2024-06-21 16:39:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:28,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:28,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006247271] [2024-06-21 16:39:28,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006247271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:28,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:28,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439237073] [2024-06-21 16:39:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:28,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:28,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 231 transitions, 3051 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:28,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:28,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:28,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:29,625 INFO L124 PetriNetUnfolderBase]: 2661/3927 cut-off events. [2024-06-21 16:39:29,625 INFO L125 PetriNetUnfolderBase]: For 213859/213873 co-relation queries the response was YES. [2024-06-21 16:39:29,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31750 conditions, 3927 events. 2661/3927 cut-off events. For 213859/213873 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18691 event pairs, 588 based on Foata normal form. 20/3947 useless extension candidates. Maximal degree in co-relation 31678. Up to 3731 conditions per place. [2024-06-21 16:39:29,658 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 47 changer transitions 0/265 dead transitions. [2024-06-21 16:39:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 265 transitions, 3959 flow [2024-06-21 16:39:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 16:39:29,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 16:39:29,659 INFO L175 Difference]: Start difference. First operand has 166 places, 231 transitions, 3051 flow. Second operand 9 states and 151 transitions. [2024-06-21 16:39:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 265 transitions, 3959 flow [2024-06-21 16:39:29,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 265 transitions, 3824 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:29,838 INFO L231 Difference]: Finished difference. Result has 169 places, 234 transitions, 3110 flow [2024-06-21 16:39:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3110, PETRI_PLACES=169, PETRI_TRANSITIONS=234} [2024-06-21 16:39:29,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-21 16:39:29,838 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 234 transitions, 3110 flow [2024-06-21 16:39:29,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:29,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:29,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:29,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:39:29,839 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 16:39:29,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1986052436, now seen corresponding path program 3 times [2024-06-21 16:39:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:29,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058687852] [2024-06-21 16:39:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:30,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:30,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058687852] [2024-06-21 16:39:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058687852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:30,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791858996] [2024-06-21 16:39:30,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:30,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:30,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 234 transitions, 3110 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:31,315 INFO L124 PetriNetUnfolderBase]: 2702/3990 cut-off events. [2024-06-21 16:39:31,315 INFO L125 PetriNetUnfolderBase]: For 226284/226298 co-relation queries the response was YES. [2024-06-21 16:39:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32721 conditions, 3990 events. 2702/3990 cut-off events. For 226284/226298 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19087 event pairs, 547 based on Foata normal form. 20/4010 useless extension candidates. Maximal degree in co-relation 32648. Up to 3614 conditions per place. [2024-06-21 16:39:31,351 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 78 changer transitions 0/273 dead transitions. [2024-06-21 16:39:31,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 273 transitions, 4212 flow [2024-06-21 16:39:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 16:39:31,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-21 16:39:31,358 INFO L175 Difference]: Start difference. First operand has 169 places, 234 transitions, 3110 flow. Second operand 9 states and 154 transitions. [2024-06-21 16:39:31,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 273 transitions, 4212 flow [2024-06-21 16:39:31,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4032 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:31,579 INFO L231 Difference]: Finished difference. Result has 171 places, 240 transitions, 3284 flow [2024-06-21 16:39:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3284, PETRI_PLACES=171, PETRI_TRANSITIONS=240} [2024-06-21 16:39:31,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-21 16:39:31,580 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 240 transitions, 3284 flow [2024-06-21 16:39:31,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:31,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:31,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:31,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:39:31,581 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 16:39:31,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:31,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1986060806, now seen corresponding path program 4 times [2024-06-21 16:39:31,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:31,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795688545] [2024-06-21 16:39:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:31,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:32,330 INFO 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 16:39:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795688545] [2024-06-21 16:39:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795688545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:32,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:32,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:32,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400156898] [2024-06-21 16:39:32,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:32,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:32,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:32,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:32,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:32,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:32,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 240 transitions, 3284 flow. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:32,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:32,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:33,112 INFO L124 PetriNetUnfolderBase]: 2692/3976 cut-off events. [2024-06-21 16:39:33,112 INFO L125 PetriNetUnfolderBase]: For 231601/231615 co-relation queries the response was YES. [2024-06-21 16:39:33,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32762 conditions, 3976 events. 2692/3976 cut-off events. For 231601/231615 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18960 event pairs, 589 based on Foata normal form. 20/3996 useless extension candidates. Maximal degree in co-relation 32688. Up to 3720 conditions per place. [2024-06-21 16:39:33,149 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 68 changer transitions 0/274 dead transitions. [2024-06-21 16:39:33,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 274 transitions, 4066 flow [2024-06-21 16:39:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:39:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:39:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-21 16:39:33,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-21 16:39:33,150 INFO L175 Difference]: Start difference. First operand has 171 places, 240 transitions, 3284 flow. Second operand 10 states and 166 transitions. [2024-06-21 16:39:33,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 274 transitions, 4066 flow [2024-06-21 16:39:33,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 274 transitions, 3852 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:33,378 INFO L231 Difference]: Finished difference. Result has 177 places, 240 transitions, 3215 flow [2024-06-21 16:39:33,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3215, PETRI_PLACES=177, PETRI_TRANSITIONS=240} [2024-06-21 16:39:33,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-21 16:39:33,378 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 240 transitions, 3215 flow [2024-06-21 16:39:33,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:33,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:33,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:33,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:39:33,379 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:33,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:33,379 INFO L85 PathProgramCache]: Analyzing trace with hash 743341476, now seen corresponding path program 2 times [2024-06-21 16:39:33,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:33,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146780782] [2024-06-21 16:39:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:33,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:33,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146780782] [2024-06-21 16:39:33,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146780782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:33,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:33,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356325217] [2024-06-21 16:39:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:33,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:33,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 240 transitions, 3215 flow. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:33,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:33,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:33,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:34,463 INFO L124 PetriNetUnfolderBase]: 2689/3972 cut-off events. [2024-06-21 16:39:34,463 INFO L125 PetriNetUnfolderBase]: For 234163/234177 co-relation queries the response was YES. [2024-06-21 16:39:34,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32705 conditions, 3972 events. 2689/3972 cut-off events. For 234163/234177 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18981 event pairs, 606 based on Foata normal form. 15/3987 useless extension candidates. Maximal degree in co-relation 32629. Up to 3934 conditions per place. [2024-06-21 16:39:34,498 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 230 selfloop transitions, 16 changer transitions 0/249 dead transitions. [2024-06-21 16:39:34,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 249 transitions, 3729 flow [2024-06-21 16:39:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-21 16:39:34,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-21 16:39:34,499 INFO L175 Difference]: Start difference. First operand has 177 places, 240 transitions, 3215 flow. Second operand 6 states and 91 transitions. [2024-06-21 16:39:34,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 249 transitions, 3729 flow [2024-06-21 16:39:34,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 249 transitions, 3553 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 16:39:34,753 INFO L231 Difference]: Finished difference. Result has 174 places, 240 transitions, 3077 flow [2024-06-21 16:39:34,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3039, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3077, PETRI_PLACES=174, PETRI_TRANSITIONS=240} [2024-06-21 16:39:34,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-21 16:39:34,753 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 240 transitions, 3077 flow [2024-06-21 16:39:34,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:34,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:34,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:34,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:39:34,754 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 16:39:34,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:34,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1235411028, now seen corresponding path program 1 times [2024-06-21 16:39:34,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:34,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266212312] [2024-06-21 16:39:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:34,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:35,181 INFO 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 16:39:35,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:35,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266212312] [2024-06-21 16:39:35,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266212312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:35,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:35,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:35,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557386385] [2024-06-21 16:39:35,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:35,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:35,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:35,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:35,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:35,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 240 transitions, 3077 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:35,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:35,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:35,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:35,766 INFO L124 PetriNetUnfolderBase]: 2442/3719 cut-off events. [2024-06-21 16:39:35,767 INFO L125 PetriNetUnfolderBase]: For 206738/206738 co-relation queries the response was YES. [2024-06-21 16:39:35,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29610 conditions, 3719 events. 2442/3719 cut-off events. For 206738/206738 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18381 event pairs, 515 based on Foata normal form. 2/3721 useless extension candidates. Maximal degree in co-relation 29533. Up to 3568 conditions per place. [2024-06-21 16:39:35,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 19 changer transitions 0/256 dead transitions. [2024-06-21 16:39:35,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 256 transitions, 3741 flow [2024-06-21 16:39:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:35,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 16:39:35,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:39:35,799 INFO L175 Difference]: Start difference. First operand has 174 places, 240 transitions, 3077 flow. Second operand 6 states and 102 transitions. [2024-06-21 16:39:35,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 256 transitions, 3741 flow [2024-06-21 16:39:35,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 256 transitions, 3701 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:36,000 INFO L231 Difference]: Finished difference. Result has 175 places, 243 transitions, 3131 flow [2024-06-21 16:39:36,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3037, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3131, PETRI_PLACES=175, PETRI_TRANSITIONS=243} [2024-06-21 16:39:36,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-21 16:39:36,001 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 243 transitions, 3131 flow [2024-06-21 16:39:36,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:36,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:36,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:36,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:39:36,001 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 16:39:36,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash 742828488, now seen corresponding path program 2 times [2024-06-21 16:39:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:36,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751578331] [2024-06-21 16:39:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:36,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:36,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:36,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751578331] [2024-06-21 16:39:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751578331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:36,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:36,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:39:36,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504926176] [2024-06-21 16:39:36,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:36,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:39:36,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:39:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:39:36,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:39:36,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 243 transitions, 3131 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:36,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:36,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:39:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:37,090 INFO L124 PetriNetUnfolderBase]: 2408/3667 cut-off events. [2024-06-21 16:39:37,090 INFO L125 PetriNetUnfolderBase]: For 212962/212962 co-relation queries the response was YES. [2024-06-21 16:39:37,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29480 conditions, 3667 events. 2408/3667 cut-off events. For 212962/212962 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 18101 event pairs, 512 based on Foata normal form. 1/3668 useless extension candidates. Maximal degree in co-relation 29402. Up to 3547 conditions per place. [2024-06-21 16:39:37,120 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 237 selfloop transitions, 11 changer transitions 0/252 dead transitions. [2024-06-21 16:39:37,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 252 transitions, 3649 flow [2024-06-21 16:39:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:39:37,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:39:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 94 transitions. [2024-06-21 16:39:37,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 16:39:37,121 INFO L175 Difference]: Start difference. First operand has 175 places, 243 transitions, 3131 flow. Second operand 6 states and 94 transitions. [2024-06-21 16:39:37,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 252 transitions, 3649 flow [2024-06-21 16:39:37,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 252 transitions, 3620 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:39:37,324 INFO L231 Difference]: Finished difference. Result has 178 places, 243 transitions, 3130 flow [2024-06-21 16:39:37,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3130, PETRI_PLACES=178, PETRI_TRANSITIONS=243} [2024-06-21 16:39:37,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-21 16:39:37,325 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 243 transitions, 3130 flow [2024-06-21 16:39:37,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:37,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:37,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:39:37,325 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:37,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1819495464, now seen corresponding path program 1 times [2024-06-21 16:39:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368311643] [2024-06-21 16:39:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:38,073 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 16:39:38,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:38,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368311643] [2024-06-21 16:39:38,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368311643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:38,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:38,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:38,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534791920] [2024-06-21 16:39:38,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:38,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:38,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:38,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:38,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:38,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:38,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 243 transitions, 3130 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:38,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:38,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:38,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:38,945 INFO L124 PetriNetUnfolderBase]: 2711/4003 cut-off events. [2024-06-21 16:39:38,945 INFO L125 PetriNetUnfolderBase]: For 265793/265793 co-relation queries the response was YES. [2024-06-21 16:39:38,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33518 conditions, 4003 events. 2711/4003 cut-off events. For 265793/265793 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 19095 event pairs, 415 based on Foata normal form. 6/4009 useless extension candidates. Maximal degree in co-relation 33439. Up to 3793 conditions per place. [2024-06-21 16:39:38,985 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 254 selfloop transitions, 33 changer transitions 0/290 dead transitions. [2024-06-21 16:39:38,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 290 transitions, 4248 flow [2024-06-21 16:39:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:38,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 16:39:38,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-21 16:39:38,986 INFO L175 Difference]: Start difference. First operand has 178 places, 243 transitions, 3130 flow. Second operand 9 states and 155 transitions. [2024-06-21 16:39:38,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 290 transitions, 4248 flow [2024-06-21 16:39:39,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 290 transitions, 4201 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:39:39,260 INFO L231 Difference]: Finished difference. Result has 183 places, 251 transitions, 3370 flow [2024-06-21 16:39:39,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3083, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3370, PETRI_PLACES=183, PETRI_TRANSITIONS=251} [2024-06-21 16:39:39,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-21 16:39:39,261 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 251 transitions, 3370 flow [2024-06-21 16:39:39,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:39,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:39,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:39,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:39:39,262 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 16:39:39,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash -640903256, now seen corresponding path program 2 times [2024-06-21 16:39:39,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:39,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050014621] [2024-06-21 16:39:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:39,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:40,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:40,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050014621] [2024-06-21 16:39:40,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050014621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:40,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:40,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:40,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249315724] [2024-06-21 16:39:40,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:40,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:40,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:40,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:40,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 251 transitions, 3370 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:40,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:40,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:40,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:41,111 INFO L124 PetriNetUnfolderBase]: 2790/4124 cut-off events. [2024-06-21 16:39:41,112 INFO L125 PetriNetUnfolderBase]: For 290812/290812 co-relation queries the response was YES. [2024-06-21 16:39:41,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35768 conditions, 4124 events. 2790/4124 cut-off events. For 290812/290812 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19890 event pairs, 559 based on Foata normal form. 6/4130 useless extension candidates. Maximal degree in co-relation 35686. Up to 3801 conditions per place. [2024-06-21 16:39:41,147 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 251 selfloop transitions, 44 changer transitions 0/298 dead transitions. [2024-06-21 16:39:41,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 298 transitions, 4626 flow [2024-06-21 16:39:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:39:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:39:41,152 INFO L175 Difference]: Start difference. First operand has 183 places, 251 transitions, 3370 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:39:41,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 298 transitions, 4626 flow [2024-06-21 16:39:41,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 298 transitions, 4471 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-21 16:39:41,477 INFO L231 Difference]: Finished difference. Result has 189 places, 257 transitions, 3499 flow [2024-06-21 16:39:41,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3499, PETRI_PLACES=189, PETRI_TRANSITIONS=257} [2024-06-21 16:39:41,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-21 16:39:41,478 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 257 transitions, 3499 flow [2024-06-21 16:39:41,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:41,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:41,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:41,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:39:41,478 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:41,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:41,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1821373134, now seen corresponding path program 3 times [2024-06-21 16:39:41,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:41,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47311145] [2024-06-21 16:39:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:41,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:42,294 INFO 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 16:39:42,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47311145] [2024-06-21 16:39:42,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47311145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:42,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:42,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:42,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995429810] [2024-06-21 16:39:42,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:42,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:42,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:42,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:42,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:42,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 257 transitions, 3499 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:42,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:42,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:42,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:43,221 INFO L124 PetriNetUnfolderBase]: 2793/4129 cut-off events. [2024-06-21 16:39:43,221 INFO L125 PetriNetUnfolderBase]: For 304280/304280 co-relation queries the response was YES. [2024-06-21 16:39:43,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36090 conditions, 4129 events. 2793/4129 cut-off events. For 304280/304280 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19910 event pairs, 555 based on Foata normal form. 6/4135 useless extension candidates. Maximal degree in co-relation 36005. Up to 3904 conditions per place. [2024-06-21 16:39:43,259 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 249 selfloop transitions, 46 changer transitions 0/298 dead transitions. [2024-06-21 16:39:43,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 298 transitions, 4473 flow [2024-06-21 16:39:43,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 16:39:43,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 16:39:43,260 INFO L175 Difference]: Start difference. First operand has 189 places, 257 transitions, 3499 flow. Second operand 9 states and 156 transitions. [2024-06-21 16:39:43,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 298 transitions, 4473 flow [2024-06-21 16:39:43,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 4286 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:43,594 INFO L231 Difference]: Finished difference. Result has 193 places, 260 transitions, 3525 flow [2024-06-21 16:39:43,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3332, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3525, PETRI_PLACES=193, PETRI_TRANSITIONS=260} [2024-06-21 16:39:43,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-21 16:39:43,595 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 260 transitions, 3525 flow [2024-06-21 16:39:43,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:43,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:43,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:43,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:39:43,595 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 16:39:43,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1908215046, now seen corresponding path program 1 times [2024-06-21 16:39:43,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:43,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471133147] [2024-06-21 16:39:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:43,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:44,274 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 16:39:44,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:44,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471133147] [2024-06-21 16:39:44,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471133147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:44,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:44,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:44,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712466772] [2024-06-21 16:39:44,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:44,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:44,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:44,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:44,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:44,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:44,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 260 transitions, 3525 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:44,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:44,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:44,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:45,201 INFO L124 PetriNetUnfolderBase]: 2917/4333 cut-off events. [2024-06-21 16:39:45,202 INFO L125 PetriNetUnfolderBase]: For 351805/351805 co-relation queries the response was YES. [2024-06-21 16:39:45,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37599 conditions, 4333 events. 2917/4333 cut-off events. For 351805/351805 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21361 event pairs, 556 based on Foata normal form. 30/4363 useless extension candidates. Maximal degree in co-relation 37512. Up to 3707 conditions per place. [2024-06-21 16:39:45,240 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 225 selfloop transitions, 74 changer transitions 0/302 dead transitions. [2024-06-21 16:39:45,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 302 transitions, 4513 flow [2024-06-21 16:39:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:45,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 16:39:45,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:39:45,241 INFO L175 Difference]: Start difference. First operand has 193 places, 260 transitions, 3525 flow. Second operand 9 states and 162 transitions. [2024-06-21 16:39:45,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 302 transitions, 4513 flow [2024-06-21 16:39:45,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 302 transitions, 4352 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:45,681 INFO L231 Difference]: Finished difference. Result has 195 places, 262 transitions, 3614 flow [2024-06-21 16:39:45,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3614, PETRI_PLACES=195, PETRI_TRANSITIONS=262} [2024-06-21 16:39:45,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 16:39:45,681 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 262 transitions, 3614 flow [2024-06-21 16:39:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:45,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:45,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:39:45,682 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:39:45,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 342795238, now seen corresponding path program 1 times [2024-06-21 16:39:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:45,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241538021] [2024-06-21 16:39:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:45,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241538021] [2024-06-21 16:39:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241538021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:46,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:46,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:39:46,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209281129] [2024-06-21 16:39:46,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:46,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:39:46,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:39:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:39:46,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:46,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 262 transitions, 3614 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:46,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:46,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:46,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:47,056 INFO L124 PetriNetUnfolderBase]: 2927/4347 cut-off events. [2024-06-21 16:39:47,056 INFO L125 PetriNetUnfolderBase]: For 332743/332743 co-relation queries the response was YES. [2024-06-21 16:39:47,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38246 conditions, 4347 events. 2927/4347 cut-off events. For 332743/332743 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21423 event pairs, 604 based on Foata normal form. 2/4349 useless extension candidates. Maximal degree in co-relation 38158. Up to 4262 conditions per place. [2024-06-21 16:39:47,098 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 258 selfloop transitions, 30 changer transitions 0/291 dead transitions. [2024-06-21 16:39:47,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 291 transitions, 4459 flow [2024-06-21 16:39:47,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:47,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-21 16:39:47,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-21 16:39:47,099 INFO L175 Difference]: Start difference. First operand has 195 places, 262 transitions, 3614 flow. Second operand 7 states and 118 transitions. [2024-06-21 16:39:47,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 291 transitions, 4459 flow [2024-06-21 16:39:47,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 291 transitions, 4247 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:47,663 INFO L231 Difference]: Finished difference. Result has 195 places, 267 transitions, 3581 flow [2024-06-21 16:39:47,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3581, PETRI_PLACES=195, PETRI_TRANSITIONS=267} [2024-06-21 16:39:47,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-21 16:39:47,664 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 267 transitions, 3581 flow [2024-06-21 16:39:47,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:47,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:47,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:39:47,665 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 16:39:47,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1192630448, now seen corresponding path program 4 times [2024-06-21 16:39:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866414331] [2024-06-21 16:39:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:48,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:48,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866414331] [2024-06-21 16:39:48,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866414331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:48,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:48,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:48,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3836621] [2024-06-21 16:39:48,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:48,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:48,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:48,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 267 transitions, 3581 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:48,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:48,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:48,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:49,481 INFO L124 PetriNetUnfolderBase]: 3079/4595 cut-off events. [2024-06-21 16:39:49,481 INFO L125 PetriNetUnfolderBase]: For 386614/386614 co-relation queries the response was YES. [2024-06-21 16:39:49,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39485 conditions, 4595 events. 3079/4595 cut-off events. For 386614/386614 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 23104 event pairs, 587 based on Foata normal form. 36/4631 useless extension candidates. Maximal degree in co-relation 39396. Up to 3888 conditions per place. [2024-06-21 16:39:49,527 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 227 selfloop transitions, 80 changer transitions 0/310 dead transitions. [2024-06-21 16:39:49,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 310 transitions, 4617 flow [2024-06-21 16:39:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:49,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:49,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:39:49,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:39:49,528 INFO L175 Difference]: Start difference. First operand has 195 places, 267 transitions, 3581 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:39:49,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 310 transitions, 4617 flow [2024-06-21 16:39:50,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 310 transitions, 4529 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:50,267 INFO L231 Difference]: Finished difference. Result has 199 places, 270 transitions, 3779 flow [2024-06-21 16:39:50,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3779, PETRI_PLACES=199, PETRI_TRANSITIONS=270} [2024-06-21 16:39:50,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-21 16:39:50,268 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 270 transitions, 3779 flow [2024-06-21 16:39:50,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:50,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:50,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:50,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:39:50,269 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 16:39:50,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:50,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1192845650, now seen corresponding path program 2 times [2024-06-21 16:39:50,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:50,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754281177] [2024-06-21 16:39:50,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:50,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:50,884 INFO 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 16:39:50,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:50,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754281177] [2024-06-21 16:39:50,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754281177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:50,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:50,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:39:50,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494568851] [2024-06-21 16:39:50,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:50,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:39:50,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:50,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:39:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:39:50,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:50,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 270 transitions, 3779 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:50,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:50,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:50,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:52,018 INFO L124 PetriNetUnfolderBase]: 3307/4967 cut-off events. [2024-06-21 16:39:52,018 INFO L125 PetriNetUnfolderBase]: For 438582/438582 co-relation queries the response was YES. [2024-06-21 16:39:52,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44544 conditions, 4967 events. 3307/4967 cut-off events. For 438582/438582 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 25566 event pairs, 626 based on Foata normal form. 24/4991 useless extension candidates. Maximal degree in co-relation 44454. Up to 3682 conditions per place. [2024-06-21 16:39:52,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 230 selfloop transitions, 87 changer transitions 0/320 dead transitions. [2024-06-21 16:39:52,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 320 transitions, 5143 flow [2024-06-21 16:39:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:39:52,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 16:39:52,068 INFO L175 Difference]: Start difference. First operand has 199 places, 270 transitions, 3779 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:39:52,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 320 transitions, 5143 flow [2024-06-21 16:39:52,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 320 transitions, 4905 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:52,748 INFO L231 Difference]: Finished difference. Result has 201 places, 274 transitions, 3914 flow [2024-06-21 16:39:52,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3541, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3914, PETRI_PLACES=201, PETRI_TRANSITIONS=274} [2024-06-21 16:39:52,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-21 16:39:52,749 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 274 transitions, 3914 flow [2024-06-21 16:39:52,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:52,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:52,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:52,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:39:52,750 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 16:39:52,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:52,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1187123918, now seen corresponding path program 5 times [2024-06-21 16:39:52,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:52,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118156631] [2024-06-21 16:39:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:52,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:39:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:53,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118156631] [2024-06-21 16:39:53,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118156631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:53,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:53,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:53,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234256052] [2024-06-21 16:39:53,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:53,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:53,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:53,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:53,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:53,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:53,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 274 transitions, 3914 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:53,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:53,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:53,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:54,600 INFO L124 PetriNetUnfolderBase]: 3297/4953 cut-off events. [2024-06-21 16:39:54,600 INFO L125 PetriNetUnfolderBase]: For 412451/412451 co-relation queries the response was YES. [2024-06-21 16:39:54,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43645 conditions, 4953 events. 3297/4953 cut-off events. For 412451/412451 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25644 event pairs, 678 based on Foata normal form. 6/4959 useless extension candidates. Maximal degree in co-relation 43554. Up to 4424 conditions per place. [2024-06-21 16:39:54,648 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 239 selfloop transitions, 72 changer transitions 0/314 dead transitions. [2024-06-21 16:39:54,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 314 transitions, 5052 flow [2024-06-21 16:39:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:54,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 16:39:54,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-21 16:39:54,649 INFO L175 Difference]: Start difference. First operand has 201 places, 274 transitions, 3914 flow. Second operand 9 states and 160 transitions. [2024-06-21 16:39:54,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 314 transitions, 5052 flow [2024-06-21 16:39:55,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 314 transitions, 4874 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:39:55,365 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 4014 flow [2024-06-21 16:39:55,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3736, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4014, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-21 16:39:55,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-21 16:39:55,366 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 4014 flow [2024-06-21 16:39:55,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:55,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:55,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:55,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:39:55,366 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 16:39:55,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1187120198, now seen corresponding path program 6 times [2024-06-21 16:39:55,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:55,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101478984] [2024-06-21 16:39:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:55,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:56,151 INFO 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 16:39:56,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:56,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101478984] [2024-06-21 16:39:56,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101478984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:56,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:56,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:39:56,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341275846] [2024-06-21 16:39:56,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:56,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:39:56,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:39:56,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:39:56,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:56,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 4014 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:56,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:56,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:56,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:57,283 INFO L124 PetriNetUnfolderBase]: 3410/5124 cut-off events. [2024-06-21 16:39:57,283 INFO L125 PetriNetUnfolderBase]: For 438391/438391 co-relation queries the response was YES. [2024-06-21 16:39:57,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45959 conditions, 5124 events. 3410/5124 cut-off events. For 438391/438391 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26685 event pairs, 718 based on Foata normal form. 6/5130 useless extension candidates. Maximal degree in co-relation 45866. Up to 4215 conditions per place. [2024-06-21 16:39:57,337 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 245 selfloop transitions, 77 changer transitions 0/325 dead transitions. [2024-06-21 16:39:57,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 325 transitions, 5396 flow [2024-06-21 16:39:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:39:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:39:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:39:57,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 16:39:57,338 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 4014 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:39:57,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 325 transitions, 5396 flow [2024-06-21 16:39:57,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 325 transitions, 5146 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-21 16:39:57,991 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 4160 flow [2024-06-21 16:39:57,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3764, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4160, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-21 16:39:57,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-21 16:39:57,992 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 4160 flow [2024-06-21 16:39:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:57,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:39:57,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:39:57,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:39:57,992 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 16:39:57,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:39:57,993 INFO L85 PathProgramCache]: Analyzing trace with hash 681824482, now seen corresponding path program 2 times [2024-06-21 16:39:57,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:39:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913308007] [2024-06-21 16:39:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:39:57,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:39:57,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:39:58,472 INFO 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 16:39:58,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:39:58,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913308007] [2024-06-21 16:39:58,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913308007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:39:58,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:39:58,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:39:58,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642500491] [2024-06-21 16:39:58,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:39:58,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:39:58,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:39:58,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:39:58,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:39:58,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:39:58,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 4160 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:39:58,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:39:58,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:39:58,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:39:59,550 INFO L124 PetriNetUnfolderBase]: 3420/5138 cut-off events. [2024-06-21 16:39:59,550 INFO L125 PetriNetUnfolderBase]: For 452038/452038 co-relation queries the response was YES. [2024-06-21 16:39:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46631 conditions, 5138 events. 3420/5138 cut-off events. For 452038/452038 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26854 event pairs, 759 based on Foata normal form. 2/5140 useless extension candidates. Maximal degree in co-relation 46536. Up to 5049 conditions per place. [2024-06-21 16:39:59,598 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 270 selfloop transitions, 34 changer transitions 0/307 dead transitions. [2024-06-21 16:39:59,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 307 transitions, 5041 flow [2024-06-21 16:39:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:39:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:39:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-21 16:39:59,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-21 16:39:59,599 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 4160 flow. Second operand 7 states and 114 transitions. [2024-06-21 16:39:59,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 307 transitions, 5041 flow [2024-06-21 16:40:00,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 307 transitions, 4794 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:00,503 INFO L231 Difference]: Finished difference. Result has 210 places, 288 transitions, 4102 flow [2024-06-21 16:40:00,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3920, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4102, PETRI_PLACES=210, PETRI_TRANSITIONS=288} [2024-06-21 16:40:00,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-21 16:40:00,503 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 288 transitions, 4102 flow [2024-06-21 16:40:00,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:00,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:00,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:40:00,504 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:00,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:00,504 INFO L85 PathProgramCache]: Analyzing trace with hash 343094140, now seen corresponding path program 1 times [2024-06-21 16:40:00,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:00,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111327834] [2024-06-21 16:40:00,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:00,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:00,982 INFO 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 16:40:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111327834] [2024-06-21 16:40:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111327834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:00,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116018822] [2024-06-21 16:40:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:00,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:00,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:01,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 288 transitions, 4102 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:02,050 INFO L124 PetriNetUnfolderBase]: 3425/5145 cut-off events. [2024-06-21 16:40:02,050 INFO L125 PetriNetUnfolderBase]: For 456652/456652 co-relation queries the response was YES. [2024-06-21 16:40:02,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46225 conditions, 5145 events. 3425/5145 cut-off events. For 456652/456652 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26822 event pairs, 759 based on Foata normal form. 1/5146 useless extension candidates. Maximal degree in co-relation 46128. Up to 5097 conditions per place. [2024-06-21 16:40:02,094 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 288 selfloop transitions, 23 changer transitions 0/314 dead transitions. [2024-06-21 16:40:02,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 314 transitions, 4962 flow [2024-06-21 16:40:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:40:02,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-21 16:40:02,095 INFO L175 Difference]: Start difference. First operand has 210 places, 288 transitions, 4102 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:40:02,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 314 transitions, 4962 flow [2024-06-21 16:40:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 314 transitions, 4884 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:40:02,859 INFO L231 Difference]: Finished difference. Result has 214 places, 297 transitions, 4184 flow [2024-06-21 16:40:02,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4024, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4184, PETRI_PLACES=214, PETRI_TRANSITIONS=297} [2024-06-21 16:40:02,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-21 16:40:02,860 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 297 transitions, 4184 flow [2024-06-21 16:40:02,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:02,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:02,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:02,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:40:02,860 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 16:40:02,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash -175565326, now seen corresponding path program 7 times [2024-06-21 16:40:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:02,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883036757] [2024-06-21 16:40:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:02,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:03,712 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 16:40:03,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:03,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883036757] [2024-06-21 16:40:03,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883036757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:03,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:03,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:40:03,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550141024] [2024-06-21 16:40:03,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:03,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:40:03,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:03,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:40:03,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:40:03,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:03,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 297 transitions, 4184 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:03,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:03,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:03,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:04,834 INFO L124 PetriNetUnfolderBase]: 3453/5194 cut-off events. [2024-06-21 16:40:04,834 INFO L125 PetriNetUnfolderBase]: For 483860/483866 co-relation queries the response was YES. [2024-06-21 16:40:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47276 conditions, 5194 events. 3453/5194 cut-off events. For 483860/483866 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 27157 event pairs, 714 based on Foata normal form. 10/5204 useless extension candidates. Maximal degree in co-relation 47177. Up to 4186 conditions per place. [2024-06-21 16:40:04,885 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 205 selfloop transitions, 128 changer transitions 0/336 dead transitions. [2024-06-21 16:40:04,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 336 transitions, 5504 flow [2024-06-21 16:40:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:40:04,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:40:04,886 INFO L175 Difference]: Start difference. First operand has 214 places, 297 transitions, 4184 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:40:04,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 336 transitions, 5504 flow [2024-06-21 16:40:05,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 336 transitions, 5456 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 16:40:05,792 INFO L231 Difference]: Finished difference. Result has 221 places, 300 transitions, 4534 flow [2024-06-21 16:40:05,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4534, PETRI_PLACES=221, PETRI_TRANSITIONS=300} [2024-06-21 16:40:05,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-21 16:40:05,792 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 300 transitions, 4534 flow [2024-06-21 16:40:05,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:05,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:05,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:05,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:40:05,793 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 16:40:05,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1430274182, now seen corresponding path program 3 times [2024-06-21 16:40:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879705389] [2024-06-21 16:40:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:06,556 INFO 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 16:40:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:06,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879705389] [2024-06-21 16:40:06,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879705389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:06,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:06,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613232077] [2024-06-21 16:40:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:06,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:06,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:06,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:06,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:06,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 300 transitions, 4534 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:06,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:06,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:06,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:07,858 INFO L124 PetriNetUnfolderBase]: 3577/5398 cut-off events. [2024-06-21 16:40:07,858 INFO L125 PetriNetUnfolderBase]: For 550471/550477 co-relation queries the response was YES. [2024-06-21 16:40:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50256 conditions, 5398 events. 3577/5398 cut-off events. For 550471/550477 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28566 event pairs, 767 based on Foata normal form. 34/5432 useless extension candidates. Maximal degree in co-relation 50154. Up to 4555 conditions per place. [2024-06-21 16:40:07,912 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 234 selfloop transitions, 104 changer transitions 0/341 dead transitions. [2024-06-21 16:40:07,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 341 transitions, 5764 flow [2024-06-21 16:40:07,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:07,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:07,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:40:07,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-21 16:40:07,913 INFO L175 Difference]: Start difference. First operand has 221 places, 300 transitions, 4534 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:40:07,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 341 transitions, 5764 flow [2024-06-21 16:40:08,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 341 transitions, 5390 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:08,566 INFO L231 Difference]: Finished difference. Result has 223 places, 302 transitions, 4490 flow [2024-06-21 16:40:08,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4490, PETRI_PLACES=223, PETRI_TRANSITIONS=302} [2024-06-21 16:40:08,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-21 16:40:08,567 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 302 transitions, 4490 flow [2024-06-21 16:40:08,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:08,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:08,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:08,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:40:08,567 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 16:40:08,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:08,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1430120360, now seen corresponding path program 8 times [2024-06-21 16:40:08,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:08,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582294925] [2024-06-21 16:40:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:08,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:09,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:09,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582294925] [2024-06-21 16:40:09,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582294925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:09,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:09,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:40:09,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326335594] [2024-06-21 16:40:09,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:09,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:40:09,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:09,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:40:09,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:40:09,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:09,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 302 transitions, 4490 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:09,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:10,667 INFO L124 PetriNetUnfolderBase]: 3775/5712 cut-off events. [2024-06-21 16:40:10,667 INFO L125 PetriNetUnfolderBase]: For 579247/579253 co-relation queries the response was YES. [2024-06-21 16:40:10,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54641 conditions, 5712 events. 3775/5712 cut-off events. For 579247/579253 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 30769 event pairs, 814 based on Foata normal form. 10/5722 useless extension candidates. Maximal degree in co-relation 54538. Up to 4286 conditions per place. [2024-06-21 16:40:10,732 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 217 selfloop transitions, 131 changer transitions 0/351 dead transitions. [2024-06-21 16:40:10,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 351 transitions, 6272 flow [2024-06-21 16:40:10,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:40:10,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 16:40:10,733 INFO L175 Difference]: Start difference. First operand has 223 places, 302 transitions, 4490 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:40:10,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 351 transitions, 6272 flow [2024-06-21 16:40:11,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 351 transitions, 5996 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:11,667 INFO L231 Difference]: Finished difference. Result has 226 places, 308 transitions, 4747 flow [2024-06-21 16:40:11,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4747, PETRI_PLACES=226, PETRI_TRANSITIONS=308} [2024-06-21 16:40:11,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-21 16:40:11,667 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 308 transitions, 4747 flow [2024-06-21 16:40:11,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:11,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:11,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:11,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:40:11,668 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:11,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1435630610, now seen corresponding path program 9 times [2024-06-21 16:40:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551432924] [2024-06-21 16:40:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:12,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:12,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551432924] [2024-06-21 16:40:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551432924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:12,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:40:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136490944] [2024-06-21 16:40:12,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:12,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:40:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:40:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:40:12,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:12,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 308 transitions, 4747 flow. Second operand has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:12,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:12,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:12,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:13,912 INFO L124 PetriNetUnfolderBase]: 3927/5960 cut-off events. [2024-06-21 16:40:13,912 INFO L125 PetriNetUnfolderBase]: For 669619/669625 co-relation queries the response was YES. [2024-06-21 16:40:13,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57227 conditions, 5960 events. 3927/5960 cut-off events. For 669619/669625 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32569 event pairs, 814 based on Foata normal form. 40/6000 useless extension candidates. Maximal degree in co-relation 57122. Up to 4774 conditions per place. [2024-06-21 16:40:13,976 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 221 selfloop transitions, 126 changer transitions 0/350 dead transitions. [2024-06-21 16:40:13,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 350 transitions, 6047 flow [2024-06-21 16:40:13,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:13,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:40:13,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 16:40:13,978 INFO L175 Difference]: Start difference. First operand has 226 places, 308 transitions, 4747 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:40:13,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 350 transitions, 6047 flow [2024-06-21 16:40:14,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 350 transitions, 5627 flow, removed 97 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:14,751 INFO L231 Difference]: Finished difference. Result has 229 places, 311 transitions, 4741 flow [2024-06-21 16:40:14,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4741, PETRI_PLACES=229, PETRI_TRANSITIONS=311} [2024-06-21 16:40:14,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-21 16:40:14,751 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 311 transitions, 4741 flow [2024-06-21 16:40:14,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.272727272727273) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:14,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:14,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:14,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:40:14,752 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:14,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:14,752 INFO L85 PathProgramCache]: Analyzing trace with hash -169843594, now seen corresponding path program 4 times [2024-06-21 16:40:14,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:14,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560944297] [2024-06-21 16:40:14,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:14,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:15,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:15,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560944297] [2024-06-21 16:40:15,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560944297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:15,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:15,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74556359] [2024-06-21 16:40:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:15,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:15,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:15,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 311 transitions, 4741 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:15,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:15,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:15,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:16,632 INFO L124 PetriNetUnfolderBase]: 4117/6274 cut-off events. [2024-06-21 16:40:16,632 INFO L125 PetriNetUnfolderBase]: For 714182/714188 co-relation queries the response was YES. [2024-06-21 16:40:16,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60537 conditions, 6274 events. 4117/6274 cut-off events. For 714182/714188 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34863 event pairs, 850 based on Foata normal form. 28/6302 useless extension candidates. Maximal degree in co-relation 60431. Up to 4572 conditions per place. [2024-06-21 16:40:16,697 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 133 changer transitions 0/359 dead transitions. [2024-06-21 16:40:16,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 359 transitions, 6387 flow [2024-06-21 16:40:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:16,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:16,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:40:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-21 16:40:16,698 INFO L175 Difference]: Start difference. First operand has 229 places, 311 transitions, 4741 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:40:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 359 transitions, 6387 flow [2024-06-21 16:40:17,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 359 transitions, 6051 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:17,822 INFO L231 Difference]: Finished difference. Result has 231 places, 315 transitions, 4914 flow [2024-06-21 16:40:17,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4914, PETRI_PLACES=231, PETRI_TRANSITIONS=315} [2024-06-21 16:40:17,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-21 16:40:17,822 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 315 transitions, 4914 flow [2024-06-21 16:40:17,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:17,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:17,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:40:17,823 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:17,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1438342026, now seen corresponding path program 5 times [2024-06-21 16:40:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:17,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997683823] [2024-06-21 16:40:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:17,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997683823] [2024-06-21 16:40:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997683823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:18,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:18,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:18,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994717823] [2024-06-21 16:40:18,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:18,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:18,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:18,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:18,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:18,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:18,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 315 transitions, 4914 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:18,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:18,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:18,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:19,864 INFO L124 PetriNetUnfolderBase]: 4445/6794 cut-off events. [2024-06-21 16:40:19,864 INFO L125 PetriNetUnfolderBase]: For 825818/825824 co-relation queries the response was YES. [2024-06-21 16:40:19,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67082 conditions, 6794 events. 4445/6794 cut-off events. For 825818/825824 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38667 event pairs, 911 based on Foata normal form. 28/6822 useless extension candidates. Maximal degree in co-relation 66975. Up to 5142 conditions per place. [2024-06-21 16:40:19,935 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 210 selfloop transitions, 151 changer transitions 0/364 dead transitions. [2024-06-21 16:40:19,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 364 transitions, 6518 flow [2024-06-21 16:40:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:40:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-21 16:40:19,936 INFO L175 Difference]: Start difference. First operand has 231 places, 315 transitions, 4914 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:40:19,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 364 transitions, 6518 flow [2024-06-21 16:40:21,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 364 transitions, 6256 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:21,249 INFO L231 Difference]: Finished difference. Result has 236 places, 320 transitions, 5251 flow [2024-06-21 16:40:21,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5251, PETRI_PLACES=236, PETRI_TRANSITIONS=320} [2024-06-21 16:40:21,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-21 16:40:21,250 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 320 transitions, 5251 flow [2024-06-21 16:40:21,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:21,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:21,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:21,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:40:21,251 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:21,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1694849976, now seen corresponding path program 6 times [2024-06-21 16:40:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:21,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366020571] [2024-06-21 16:40:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:21,893 INFO 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 16:40:21,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:21,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366020571] [2024-06-21 16:40:21,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366020571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:21,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:21,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:21,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139307442] [2024-06-21 16:40:21,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:21,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:21,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:21,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:21,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:21,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:21,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 320 transitions, 5251 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:21,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:21,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:21,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:23,330 INFO L124 PetriNetUnfolderBase]: 4373/6686 cut-off events. [2024-06-21 16:40:23,330 INFO L125 PetriNetUnfolderBase]: For 797947/797953 co-relation queries the response was YES. [2024-06-21 16:40:23,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64472 conditions, 6686 events. 4373/6686 cut-off events. For 797947/797953 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 38023 event pairs, 902 based on Foata normal form. 40/6726 useless extension candidates. Maximal degree in co-relation 64362. Up to 5518 conditions per place. [2024-06-21 16:40:23,405 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 207 selfloop transitions, 150 changer transitions 0/360 dead transitions. [2024-06-21 16:40:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 360 transitions, 6423 flow [2024-06-21 16:40:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:40:23,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-21 16:40:23,406 INFO L175 Difference]: Start difference. First operand has 236 places, 320 transitions, 5251 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:40:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 360 transitions, 6423 flow [2024-06-21 16:40:24,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 360 transitions, 6101 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:24,632 INFO L231 Difference]: Finished difference. Result has 240 places, 322 transitions, 5345 flow [2024-06-21 16:40:24,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4933, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5345, PETRI_PLACES=240, PETRI_TRANSITIONS=322} [2024-06-21 16:40:24,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-21 16:40:24,633 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 322 transitions, 5345 flow [2024-06-21 16:40:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:24,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:24,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:40:24,634 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:24,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash 176544150, now seen corresponding path program 7 times [2024-06-21 16:40:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:24,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972487119] [2024-06-21 16:40:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:24,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:25,270 INFO 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 16:40:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972487119] [2024-06-21 16:40:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972487119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582469572] [2024-06-21 16:40:25,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:25,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:25,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 322 transitions, 5345 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:25,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:25,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:25,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:26,688 INFO L124 PetriNetUnfolderBase]: 4409/6750 cut-off events. [2024-06-21 16:40:26,688 INFO L125 PetriNetUnfolderBase]: For 779722/779728 co-relation queries the response was YES. [2024-06-21 16:40:26,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64559 conditions, 6750 events. 4409/6750 cut-off events. For 779722/779728 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 38251 event pairs, 798 based on Foata normal form. 28/6778 useless extension candidates. Maximal degree in co-relation 64447. Up to 3513 conditions per place. [2024-06-21 16:40:26,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 181 selfloop transitions, 183 changer transitions 0/367 dead transitions. [2024-06-21 16:40:26,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 367 transitions, 6803 flow [2024-06-21 16:40:26,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:40:26,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-21 16:40:26,763 INFO L175 Difference]: Start difference. First operand has 240 places, 322 transitions, 5345 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:40:26,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 367 transitions, 6803 flow [2024-06-21 16:40:28,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 367 transitions, 6415 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:28,093 INFO L231 Difference]: Finished difference. Result has 242 places, 324 transitions, 5458 flow [2024-06-21 16:40:28,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4957, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5458, PETRI_PLACES=242, PETRI_TRANSITIONS=324} [2024-06-21 16:40:28,094 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-21 16:40:28,094 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 324 transitions, 5458 flow [2024-06-21 16:40:28,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:28,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:28,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:40:28,094 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:28,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:28,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1629575972, now seen corresponding path program 8 times [2024-06-21 16:40:28,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825550488] [2024-06-21 16:40:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:28,800 INFO 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 16:40:28,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:28,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825550488] [2024-06-21 16:40:28,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825550488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:28,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:28,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:40:28,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555817961] [2024-06-21 16:40:28,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:28,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:40:28,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:28,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:40:28,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:40:28,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:28,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 324 transitions, 5458 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:28,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:28,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:28,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:30,359 INFO L124 PetriNetUnfolderBase]: 4469/6854 cut-off events. [2024-06-21 16:40:30,359 INFO L125 PetriNetUnfolderBase]: For 778544/778550 co-relation queries the response was YES. [2024-06-21 16:40:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64513 conditions, 6854 events. 4469/6854 cut-off events. For 778544/778550 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39237 event pairs, 1018 based on Foata normal form. 34/6888 useless extension candidates. Maximal degree in co-relation 64400. Up to 6049 conditions per place. [2024-06-21 16:40:30,451 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 244 selfloop transitions, 120 changer transitions 0/367 dead transitions. [2024-06-21 16:40:30,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 367 transitions, 6693 flow [2024-06-21 16:40:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:40:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:40:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:40:30,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:40:30,452 INFO L175 Difference]: Start difference. First operand has 242 places, 324 transitions, 5458 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:40:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 367 transitions, 6693 flow [2024-06-21 16:40:31,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 367 transitions, 6214 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:32,001 INFO L231 Difference]: Finished difference. Result has 244 places, 329 transitions, 5384 flow [2024-06-21 16:40:32,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4987, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5384, PETRI_PLACES=244, PETRI_TRANSITIONS=329} [2024-06-21 16:40:32,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-21 16:40:32,001 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 329 transitions, 5384 flow [2024-06-21 16:40:32,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:32,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:32,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:32,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:40:32,002 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 16:40:32,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1553079544, now seen corresponding path program 2 times [2024-06-21 16:40:32,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:32,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45485658] [2024-06-21 16:40:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:32,476 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 16:40:32,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:32,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45485658] [2024-06-21 16:40:32,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45485658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:32,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:32,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:32,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518031108] [2024-06-21 16:40:32,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:32,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:32,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:32,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:32,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:32,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:32,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 329 transitions, 5384 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:32,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:32,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:32,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:33,966 INFO L124 PetriNetUnfolderBase]: 4474/6858 cut-off events. [2024-06-21 16:40:33,966 INFO L125 PetriNetUnfolderBase]: For 729244/729256 co-relation queries the response was YES. [2024-06-21 16:40:34,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63403 conditions, 6858 events. 4474/6858 cut-off events. For 729244/729256 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 39327 event pairs, 1077 based on Foata normal form. 13/6871 useless extension candidates. Maximal degree in co-relation 63289. Up to 6807 conditions per place. [2024-06-21 16:40:34,038 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 313 selfloop transitions, 27 changer transitions 0/343 dead transitions. [2024-06-21 16:40:34,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 343 transitions, 6254 flow [2024-06-21 16:40:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-21 16:40:34,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-21 16:40:34,039 INFO L175 Difference]: Start difference. First operand has 244 places, 329 transitions, 5384 flow. Second operand 7 states and 104 transitions. [2024-06-21 16:40:34,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 343 transitions, 6254 flow [2024-06-21 16:40:35,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 343 transitions, 6006 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:35,501 INFO L231 Difference]: Finished difference. Result has 245 places, 332 transitions, 5234 flow [2024-06-21 16:40:35,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5136, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5234, PETRI_PLACES=245, PETRI_TRANSITIONS=332} [2024-06-21 16:40:35,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-21 16:40:35,502 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 332 transitions, 5234 flow [2024-06-21 16:40:35,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:35,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:35,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:35,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:40:35,502 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 16:40:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash 697357180, now seen corresponding path program 3 times [2024-06-21 16:40:35,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:35,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832435007] [2024-06-21 16:40:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:35,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:35,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:35,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832435007] [2024-06-21 16:40:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832435007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:35,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461823021] [2024-06-21 16:40:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:35,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:36,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:36,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 332 transitions, 5234 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:36,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:36,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:36,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:37,340 INFO L124 PetriNetUnfolderBase]: 4471/6854 cut-off events. [2024-06-21 16:40:37,341 INFO L125 PetriNetUnfolderBase]: For 729405/729417 co-relation queries the response was YES. [2024-06-21 16:40:37,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62335 conditions, 6854 events. 4471/6854 cut-off events. For 729405/729417 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39309 event pairs, 1077 based on Foata normal form. 13/6867 useless extension candidates. Maximal degree in co-relation 62220. Up to 6804 conditions per place. [2024-06-21 16:40:37,423 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 313 selfloop transitions, 26 changer transitions 0/342 dead transitions. [2024-06-21 16:40:37,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 342 transitions, 5936 flow [2024-06-21 16:40:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:37,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-21 16:40:37,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623693379790941 [2024-06-21 16:40:37,424 INFO L175 Difference]: Start difference. First operand has 245 places, 332 transitions, 5234 flow. Second operand 7 states and 104 transitions. [2024-06-21 16:40:37,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 342 transitions, 5936 flow [2024-06-21 16:40:39,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 342 transitions, 5846 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:40:39,031 INFO L231 Difference]: Finished difference. Result has 248 places, 332 transitions, 5202 flow [2024-06-21 16:40:39,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5144, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5202, PETRI_PLACES=248, PETRI_TRANSITIONS=332} [2024-06-21 16:40:39,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-21 16:40:39,031 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 332 transitions, 5202 flow [2024-06-21 16:40:39,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:39,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:39,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:39,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:40:39,032 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:39,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash 697356808, now seen corresponding path program 3 times [2024-06-21 16:40:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:39,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131228229] [2024-06-21 16:40:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:39,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:39,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131228229] [2024-06-21 16:40:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131228229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:39,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956400483] [2024-06-21 16:40:39,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:39,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:39,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:39,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 332 transitions, 5202 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:39,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:39,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:39,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:40,869 INFO L124 PetriNetUnfolderBase]: 4465/6849 cut-off events. [2024-06-21 16:40:40,870 INFO L125 PetriNetUnfolderBase]: For 746860/746866 co-relation queries the response was YES. [2024-06-21 16:40:40,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62383 conditions, 6849 events. 4465/6849 cut-off events. For 746860/746866 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39260 event pairs, 1090 based on Foata normal form. 6/6855 useless extension candidates. Maximal degree in co-relation 62267. Up to 6758 conditions per place. [2024-06-21 16:40:40,959 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 306 selfloop transitions, 34 changer transitions 0/343 dead transitions. [2024-06-21 16:40:40,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 343 transitions, 5913 flow [2024-06-21 16:40:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 16:40:40,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-21 16:40:40,960 INFO L175 Difference]: Start difference. First operand has 248 places, 332 transitions, 5202 flow. Second operand 7 states and 107 transitions. [2024-06-21 16:40:40,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 343 transitions, 5913 flow [2024-06-21 16:40:42,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 343 transitions, 5839 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:40:42,449 INFO L231 Difference]: Finished difference. Result has 250 places, 332 transitions, 5204 flow [2024-06-21 16:40:42,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5204, PETRI_PLACES=250, PETRI_TRANSITIONS=332} [2024-06-21 16:40:42,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-21 16:40:42,449 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 332 transitions, 5204 flow [2024-06-21 16:40:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:42,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:42,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:42,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:40:42,450 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:42,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash 520410172, now seen corresponding path program 1 times [2024-06-21 16:40:42,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:42,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276732307] [2024-06-21 16:40:42,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:42,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:42,950 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 16:40:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276732307] [2024-06-21 16:40:42,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276732307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:42,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:42,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:42,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255128411] [2024-06-21 16:40:42,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:43,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:43,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 332 transitions, 5204 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:43,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:43,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:43,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:44,192 INFO L124 PetriNetUnfolderBase]: 4305/6699 cut-off events. [2024-06-21 16:40:44,192 INFO L125 PetriNetUnfolderBase]: For 694539/694539 co-relation queries the response was YES. [2024-06-21 16:40:44,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59802 conditions, 6699 events. 4305/6699 cut-off events. For 694539/694539 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39327 event pairs, 994 based on Foata normal form. 4/6697 useless extension candidates. Maximal degree in co-relation 59685. Up to 6502 conditions per place. [2024-06-21 16:40:44,282 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 323 selfloop transitions, 28 changer transitions 0/359 dead transitions. [2024-06-21 16:40:44,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 359 transitions, 6258 flow [2024-06-21 16:40:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-21 16:40:44,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:40:44,283 INFO L175 Difference]: Start difference. First operand has 250 places, 332 transitions, 5204 flow. Second operand 7 states and 119 transitions. [2024-06-21 16:40:44,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 359 transitions, 6258 flow [2024-06-21 16:40:46,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 359 transitions, 6154 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 16:40:46,132 INFO L231 Difference]: Finished difference. Result has 251 places, 342 transitions, 5333 flow [2024-06-21 16:40:46,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5100, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=251, PETRI_TRANSITIONS=342} [2024-06-21 16:40:46,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-21 16:40:46,133 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 342 transitions, 5333 flow [2024-06-21 16:40:46,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:46,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:46,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:46,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:40:46,133 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:46,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:46,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1574297866, now seen corresponding path program 2 times [2024-06-21 16:40:46,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:46,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810094022] [2024-06-21 16:40:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:46,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:46,614 INFO 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 16:40:46,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:46,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810094022] [2024-06-21 16:40:46,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810094022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:46,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:46,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:46,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792507815] [2024-06-21 16:40:46,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:46,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:46,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:46,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:46,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 342 transitions, 5333 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:46,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:46,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:46,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:47,917 INFO L124 PetriNetUnfolderBase]: 4315/6715 cut-off events. [2024-06-21 16:40:47,917 INFO L125 PetriNetUnfolderBase]: For 710346/710346 co-relation queries the response was YES. [2024-06-21 16:40:47,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60698 conditions, 6715 events. 4315/6715 cut-off events. For 710346/710346 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 39438 event pairs, 992 based on Foata normal form. 2/6711 useless extension candidates. Maximal degree in co-relation 60579. Up to 6572 conditions per place. [2024-06-21 16:40:47,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 21 changer transitions 0/361 dead transitions. [2024-06-21 16:40:47,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 361 transitions, 6331 flow [2024-06-21 16:40:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:47,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-21 16:40:47,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-21 16:40:47,998 INFO L175 Difference]: Start difference. First operand has 251 places, 342 transitions, 5333 flow. Second operand 7 states and 111 transitions. [2024-06-21 16:40:47,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 361 transitions, 6331 flow [2024-06-21 16:40:49,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 361 transitions, 6235 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-21 16:40:49,145 INFO L231 Difference]: Finished difference. Result has 256 places, 348 transitions, 5415 flow [2024-06-21 16:40:49,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5237, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5415, PETRI_PLACES=256, PETRI_TRANSITIONS=348} [2024-06-21 16:40:49,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-21 16:40:49,145 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 348 transitions, 5415 flow [2024-06-21 16:40:49,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:49,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:49,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:40:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:40:49,146 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:40:49,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash 694210966, now seen corresponding path program 3 times [2024-06-21 16:40:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584118445] [2024-06-21 16:40:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:49,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:49,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584118445] [2024-06-21 16:40:49,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584118445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:49,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:49,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:40:49,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209981373] [2024-06-21 16:40:49,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:49,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:40:49,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:49,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:40:49,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:40:49,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:40:49,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 348 transitions, 5415 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:49,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:49,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:40:49,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:51,054 INFO L124 PetriNetUnfolderBase]: 4309/6707 cut-off events. [2024-06-21 16:40:51,055 INFO L125 PetriNetUnfolderBase]: For 723613/723613 co-relation queries the response was YES. [2024-06-21 16:40:51,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60694 conditions, 6707 events. 4309/6707 cut-off events. For 723613/723613 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 39383 event pairs, 991 based on Foata normal form. 2/6703 useless extension candidates. Maximal degree in co-relation 60572. Up to 6576 conditions per place. [2024-06-21 16:40:51,129 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 16 changer transitions 0/359 dead transitions. [2024-06-21 16:40:51,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 359 transitions, 6145 flow [2024-06-21 16:40:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:40:51,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:40:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-21 16:40:51,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-21 16:40:51,130 INFO L175 Difference]: Start difference. First operand has 256 places, 348 transitions, 5415 flow. Second operand 7 states and 107 transitions. [2024-06-21 16:40:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 359 transitions, 6145 flow [2024-06-21 16:40:52,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 359 transitions, 6031 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-21 16:40:52,500 INFO L231 Difference]: Finished difference. Result has 260 places, 348 transitions, 5340 flow [2024-06-21 16:40:52,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5340, PETRI_PLACES=260, PETRI_TRANSITIONS=348} [2024-06-21 16:40:52,501 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-21 16:40:52,501 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 348 transitions, 5340 flow [2024-06-21 16:40:52,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:40:52,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:52,501 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 16:40:52,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:40:52,501 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 16:40:52,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:52,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1279563317, now seen corresponding path program 1 times [2024-06-21 16:40:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:52,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031073857] [2024-06-21 16:40:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:53,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:40:53,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:53,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031073857] [2024-06-21 16:40:53,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031073857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:53,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:53,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:40:53,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100743947] [2024-06-21 16:40:53,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:53,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:40:53,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:53,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:40:53,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:40:53,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:53,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 348 transitions, 5340 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:40:53,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:53,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:53,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:55,243 INFO L124 PetriNetUnfolderBase]: 4585/7033 cut-off events. [2024-06-21 16:40:55,244 INFO L125 PetriNetUnfolderBase]: For 873037/873037 co-relation queries the response was YES. [2024-06-21 16:40:55,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65472 conditions, 7033 events. 4585/7033 cut-off events. For 873037/873037 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 40239 event pairs, 897 based on Foata normal form. 18/7051 useless extension candidates. Maximal degree in co-relation 65349. Up to 6713 conditions per place. [2024-06-21 16:40:55,328 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 45 changer transitions 0/395 dead transitions. [2024-06-21 16:40:55,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 395 transitions, 6642 flow [2024-06-21 16:40:55,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:40:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:40:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-21 16:40:55,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:40:55,329 INFO L175 Difference]: Start difference. First operand has 260 places, 348 transitions, 5340 flow. Second operand 10 states and 170 transitions. [2024-06-21 16:40:55,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 395 transitions, 6642 flow [2024-06-21 16:40:56,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 395 transitions, 6596 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:40:56,626 INFO L231 Difference]: Finished difference. Result has 264 places, 350 transitions, 5523 flow [2024-06-21 16:40:56,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5294, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5523, PETRI_PLACES=264, PETRI_TRANSITIONS=350} [2024-06-21 16:40:56,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-21 16:40:56,627 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 350 transitions, 5523 flow [2024-06-21 16:40:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:40:56,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:40:56,627 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 16:40:56,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:40:56,627 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 16:40:56,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:40:56,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1606836577, now seen corresponding path program 2 times [2024-06-21 16:40:56,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:40:56,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203492309] [2024-06-21 16:40:56,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:40:56,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:40:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:40:57,751 INFO 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 16:40:57,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:40:57,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203492309] [2024-06-21 16:40:57,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203492309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:40:57,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:40:57,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:40:57,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218619588] [2024-06-21 16:40:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:40:57,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:40:57,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:40:57,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:40:57,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:40:57,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:40:57,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 350 transitions, 5523 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:40:57,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:40:57,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:40:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:40:59,465 INFO L124 PetriNetUnfolderBase]: 4653/7149 cut-off events. [2024-06-21 16:40:59,465 INFO L125 PetriNetUnfolderBase]: For 906785/906785 co-relation queries the response was YES. [2024-06-21 16:40:59,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67191 conditions, 7149 events. 4653/7149 cut-off events. For 906785/906785 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 41474 event pairs, 1064 based on Foata normal form. 18/7167 useless extension candidates. Maximal degree in co-relation 67067. Up to 6716 conditions per place. [2024-06-21 16:40:59,551 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 336 selfloop transitions, 58 changer transitions 0/397 dead transitions. [2024-06-21 16:40:59,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 397 transitions, 6839 flow [2024-06-21 16:40:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:40:59,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:40:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 16:40:59,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-21 16:40:59,553 INFO L175 Difference]: Start difference. First operand has 264 places, 350 transitions, 5523 flow. Second operand 10 states and 172 transitions. [2024-06-21 16:40:59,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 397 transitions, 6839 flow [2024-06-21 16:41:01,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 397 transitions, 6636 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-21 16:41:01,074 INFO L231 Difference]: Finished difference. Result has 266 places, 352 transitions, 5579 flow [2024-06-21 16:41:01,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5320, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5579, PETRI_PLACES=266, PETRI_TRANSITIONS=352} [2024-06-21 16:41:01,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-21 16:41:01,075 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 352 transitions, 5579 flow [2024-06-21 16:41:01,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:41:01,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:01,075 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 16:41:01,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:41:01,075 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 16:41:01,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:01,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1606951897, now seen corresponding path program 3 times [2024-06-21 16:41:01,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:01,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086431619] [2024-06-21 16:41:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:02,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:02,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086431619] [2024-06-21 16:41:02,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086431619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:02,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:02,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:41:02,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408421344] [2024-06-21 16:41:02,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:02,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:41:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:02,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:41:02,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:41:02,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:02,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 352 transitions, 5579 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:41:02,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:02,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:02,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:04,059 INFO L124 PetriNetUnfolderBase]: 4721/7265 cut-off events. [2024-06-21 16:41:04,059 INFO L125 PetriNetUnfolderBase]: For 937710/937710 co-relation queries the response was YES. [2024-06-21 16:41:04,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67808 conditions, 7265 events. 4721/7265 cut-off events. For 937710/937710 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42407 event pairs, 1097 based on Foata normal form. 18/7283 useless extension candidates. Maximal degree in co-relation 67683. Up to 6927 conditions per place. [2024-06-21 16:41:04,150 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 337 selfloop transitions, 58 changer transitions 0/398 dead transitions. [2024-06-21 16:41:04,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 398 transitions, 6723 flow [2024-06-21 16:41:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:41:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:41:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-21 16:41:04,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-21 16:41:04,151 INFO L175 Difference]: Start difference. First operand has 266 places, 352 transitions, 5579 flow. Second operand 10 states and 171 transitions. [2024-06-21 16:41:04,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 398 transitions, 6723 flow [2024-06-21 16:41:05,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 398 transitions, 6490 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-21 16:41:05,664 INFO L231 Difference]: Finished difference. Result has 268 places, 354 transitions, 5569 flow [2024-06-21 16:41:05,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5346, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5569, PETRI_PLACES=268, PETRI_TRANSITIONS=354} [2024-06-21 16:41:05,664 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 16:41:05,664 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 354 transitions, 5569 flow [2024-06-21 16:41:05,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:41:05,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:05,665 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 16:41:05,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:41:05,665 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:05,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:05,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2036719484, now seen corresponding path program 1 times [2024-06-21 16:41:05,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:05,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627617158] [2024-06-21 16:41:05,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:05,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:06,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:06,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:06,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627617158] [2024-06-21 16:41:06,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627617158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:06,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:06,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:06,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743704946] [2024-06-21 16:41:06,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:06,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:06,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:06,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:06,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:06,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:06,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 354 transitions, 5569 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:06,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:06,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:06,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:08,219 INFO L124 PetriNetUnfolderBase]: 4731/7279 cut-off events. [2024-06-21 16:41:08,220 INFO L125 PetriNetUnfolderBase]: For 911829/911829 co-relation queries the response was YES. [2024-06-21 16:41:08,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67425 conditions, 7279 events. 4731/7279 cut-off events. For 911829/911829 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 42483 event pairs, 1132 based on Foata normal form. 2/7281 useless extension candidates. Maximal degree in co-relation 67299. Up to 7152 conditions per place. [2024-06-21 16:41:08,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 338 selfloop transitions, 46 changer transitions 0/387 dead transitions. [2024-06-21 16:41:08,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 387 transitions, 6628 flow [2024-06-21 16:41:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:08,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 16:41:08,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-21 16:41:08,348 INFO L175 Difference]: Start difference. First operand has 268 places, 354 transitions, 5569 flow. Second operand 8 states and 133 transitions. [2024-06-21 16:41:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 387 transitions, 6628 flow [2024-06-21 16:41:10,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 387 transitions, 6435 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 16:41:10,817 INFO L231 Difference]: Finished difference. Result has 268 places, 360 transitions, 5553 flow [2024-06-21 16:41:10,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5553, PETRI_PLACES=268, PETRI_TRANSITIONS=360} [2024-06-21 16:41:10,818 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-21 16:41:10,818 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 360 transitions, 5553 flow [2024-06-21 16:41:10,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:10,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:10,818 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 16:41:10,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:41:10,818 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:10,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:10,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2040263621, now seen corresponding path program 1 times [2024-06-21 16:41:10,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:10,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569022576] [2024-06-21 16:41:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:10,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:11,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:11,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569022576] [2024-06-21 16:41:11,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569022576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:11,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:11,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:11,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959468403] [2024-06-21 16:41:11,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:11,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:11,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:11,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:11,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:11,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 360 transitions, 5553 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:11,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:11,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:11,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:12,859 INFO L124 PetriNetUnfolderBase]: 4733/7282 cut-off events. [2024-06-21 16:41:12,859 INFO L125 PetriNetUnfolderBase]: For 923645/923645 co-relation queries the response was YES. [2024-06-21 16:41:12,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67470 conditions, 7282 events. 4733/7282 cut-off events. For 923645/923645 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 42505 event pairs, 1130 based on Foata normal form. 2/7284 useless extension candidates. Maximal degree in co-relation 67343. Up to 7210 conditions per place. [2024-06-21 16:41:12,943 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 27 changer transitions 0/383 dead transitions. [2024-06-21 16:41:12,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 383 transitions, 6579 flow [2024-06-21 16:41:12,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:12,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:12,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-21 16:41:12,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-21 16:41:12,944 INFO L175 Difference]: Start difference. First operand has 268 places, 360 transitions, 5553 flow. Second operand 7 states and 115 transitions. [2024-06-21 16:41:12,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 383 transitions, 6579 flow [2024-06-21 16:41:14,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 383 transitions, 6508 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:14,653 INFO L231 Difference]: Finished difference. Result has 271 places, 363 transitions, 5616 flow [2024-06-21 16:41:14,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5616, PETRI_PLACES=271, PETRI_TRANSITIONS=363} [2024-06-21 16:41:14,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-21 16:41:14,654 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 363 transitions, 5616 flow [2024-06-21 16:41:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:14,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:14,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:41:14,654 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:14,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2045977541, now seen corresponding path program 2 times [2024-06-21 16:41:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202395396] [2024-06-21 16:41:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202395396] [2024-06-21 16:41:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202395396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:15,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:15,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414573396] [2024-06-21 16:41:15,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:15,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:15,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:15,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 363 transitions, 5616 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:15,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:15,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:15,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:16,629 INFO L124 PetriNetUnfolderBase]: 4738/7289 cut-off events. [2024-06-21 16:41:16,629 INFO L125 PetriNetUnfolderBase]: For 941770/941770 co-relation queries the response was YES. [2024-06-21 16:41:16,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67872 conditions, 7289 events. 4738/7289 cut-off events. For 941770/941770 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 42489 event pairs, 1130 based on Foata normal form. 1/7290 useless extension candidates. Maximal degree in co-relation 67743. Up to 7250 conditions per place. [2024-06-21 16:41:16,710 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 360 selfloop transitions, 19 changer transitions 0/382 dead transitions. [2024-06-21 16:41:16,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 382 transitions, 6490 flow [2024-06-21 16:41:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-21 16:41:16,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-21 16:41:16,711 INFO L175 Difference]: Start difference. First operand has 271 places, 363 transitions, 5616 flow. Second operand 7 states and 108 transitions. [2024-06-21 16:41:16,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 382 transitions, 6490 flow [2024-06-21 16:41:18,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 382 transitions, 6434 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:18,741 INFO L231 Difference]: Finished difference. Result has 274 places, 366 transitions, 5686 flow [2024-06-21 16:41:18,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5686, PETRI_PLACES=274, PETRI_TRANSITIONS=366} [2024-06-21 16:41:18,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-21 16:41:18,742 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 366 transitions, 5686 flow [2024-06-21 16:41:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:18,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:18,742 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 16:41:18,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:41:18,742 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:18,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:18,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1683160743, now seen corresponding path program 4 times [2024-06-21 16:41:18,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:18,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060683745] [2024-06-21 16:41:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:18,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:19,651 INFO 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 16:41:19,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060683745] [2024-06-21 16:41:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060683745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:19,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:19,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:19,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290439179] [2024-06-21 16:41:19,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:19,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:19,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:19,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:19,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 366 transitions, 5686 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:19,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:19,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:19,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:21,427 INFO L124 PetriNetUnfolderBase]: 4712/7251 cut-off events. [2024-06-21 16:41:21,427 INFO L125 PetriNetUnfolderBase]: For 961753/961753 co-relation queries the response was YES. [2024-06-21 16:41:21,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66596 conditions, 7251 events. 4712/7251 cut-off events. For 961753/961753 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42274 event pairs, 1038 based on Foata normal form. 18/7269 useless extension candidates. Maximal degree in co-relation 66466. Up to 6591 conditions per place. [2024-06-21 16:41:21,520 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 88 changer transitions 0/405 dead transitions. [2024-06-21 16:41:21,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 405 transitions, 6771 flow [2024-06-21 16:41:21,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:21,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 16:41:21,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-21 16:41:21,521 INFO L175 Difference]: Start difference. First operand has 274 places, 366 transitions, 5686 flow. Second operand 9 states and 156 transitions. [2024-06-21 16:41:21,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 405 transitions, 6771 flow [2024-06-21 16:41:23,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 405 transitions, 6671 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 16:41:23,619 INFO L231 Difference]: Finished difference. Result has 279 places, 368 transitions, 5823 flow [2024-06-21 16:41:23,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5823, PETRI_PLACES=279, PETRI_TRANSITIONS=368} [2024-06-21 16:41:23,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-21 16:41:23,620 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 368 transitions, 5823 flow [2024-06-21 16:41:23,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:23,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:23,620 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 16:41:23,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:41:23,620 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:23,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1288928181, now seen corresponding path program 5 times [2024-06-21 16:41:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:23,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040556322] [2024-06-21 16:41:23,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:24,707 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 16:41:24,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:24,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040556322] [2024-06-21 16:41:24,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040556322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:24,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:24,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:41:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969270726] [2024-06-21 16:41:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:41:24,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:41:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:41:24,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:24,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 368 transitions, 5823 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:41:24,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:24,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:24,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:26,683 INFO L124 PetriNetUnfolderBase]: 4780/7367 cut-off events. [2024-06-21 16:41:26,683 INFO L125 PetriNetUnfolderBase]: For 996258/996258 co-relation queries the response was YES. [2024-06-21 16:41:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68432 conditions, 7367 events. 4780/7367 cut-off events. For 996258/996258 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43151 event pairs, 1065 based on Foata normal form. 18/7385 useless extension candidates. Maximal degree in co-relation 68300. Up to 6346 conditions per place. [2024-06-21 16:41:26,768 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 326 selfloop transitions, 89 changer transitions 0/418 dead transitions. [2024-06-21 16:41:26,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 418 transitions, 7387 flow [2024-06-21 16:41:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:41:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:41:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 16:41:26,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:41:26,769 INFO L175 Difference]: Start difference. First operand has 279 places, 368 transitions, 5823 flow. Second operand 10 states and 180 transitions. [2024-06-21 16:41:26,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 418 transitions, 7387 flow [2024-06-21 16:41:28,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 418 transitions, 7141 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:28,875 INFO L231 Difference]: Finished difference. Result has 282 places, 370 transitions, 5908 flow [2024-06-21 16:41:28,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5583, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5908, PETRI_PLACES=282, PETRI_TRANSITIONS=370} [2024-06-21 16:41:28,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 16:41:28,875 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 370 transitions, 5908 flow [2024-06-21 16:41:28,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:41:28,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:28,875 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 16:41:28,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:41:28,875 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:28,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash 741097488, now seen corresponding path program 2 times [2024-06-21 16:41:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:28,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458734229] [2024-06-21 16:41:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:29,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:29,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458734229] [2024-06-21 16:41:29,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458734229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:29,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:29,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:29,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667298477] [2024-06-21 16:41:29,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:29,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:29,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:29,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 370 transitions, 5908 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:29,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:29,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:29,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:31,047 INFO L124 PetriNetUnfolderBase]: 4806/7403 cut-off events. [2024-06-21 16:41:31,047 INFO L125 PetriNetUnfolderBase]: For 962717/962717 co-relation queries the response was YES. [2024-06-21 16:41:31,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68640 conditions, 7403 events. 4806/7403 cut-off events. For 962717/962717 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43353 event pairs, 1136 based on Foata normal form. 2/7405 useless extension candidates. Maximal degree in co-relation 68507. Up to 7265 conditions per place. [2024-06-21 16:41:31,151 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 49 changer transitions 0/401 dead transitions. [2024-06-21 16:41:31,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 401 transitions, 7156 flow [2024-06-21 16:41:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:41:31,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 16:41:31,152 INFO L175 Difference]: Start difference. First operand has 282 places, 370 transitions, 5908 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:41:31,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 401 transitions, 7156 flow [2024-06-21 16:41:33,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 401 transitions, 6857 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-21 16:41:33,289 INFO L231 Difference]: Finished difference. Result has 282 places, 376 transitions, 5786 flow [2024-06-21 16:41:33,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5786, PETRI_PLACES=282, PETRI_TRANSITIONS=376} [2024-06-21 16:41:33,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-21 16:41:33,289 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 376 transitions, 5786 flow [2024-06-21 16:41:33,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:33,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:33,290 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 16:41:33,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:41:33,290 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 16:41:33,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 741109051, now seen corresponding path program 1 times [2024-06-21 16:41:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215815869] [2024-06-21 16:41:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:33,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:33,864 INFO 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 16:41:33,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:33,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215815869] [2024-06-21 16:41:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215815869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:33,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:33,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938603277] [2024-06-21 16:41:33,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:33,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:33,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:33,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:33,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:33,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 376 transitions, 5786 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:33,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:33,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:33,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:35,596 INFO L124 PetriNetUnfolderBase]: 4816/7417 cut-off events. [2024-06-21 16:41:35,596 INFO L125 PetriNetUnfolderBase]: For 966750/966750 co-relation queries the response was YES. [2024-06-21 16:41:35,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67762 conditions, 7417 events. 4816/7417 cut-off events. For 966750/966750 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 43424 event pairs, 1137 based on Foata normal form. 2/7419 useless extension candidates. Maximal degree in co-relation 67628. Up to 7342 conditions per place. [2024-06-21 16:41:35,700 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 34 changer transitions 0/402 dead transitions. [2024-06-21 16:41:35,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 402 transitions, 6890 flow [2024-06-21 16:41:35,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:35,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:41:35,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 16:41:35,701 INFO L175 Difference]: Start difference. First operand has 282 places, 376 transitions, 5786 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:41:35,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 402 transitions, 6890 flow [2024-06-21 16:41:37,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 402 transitions, 6802 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:37,353 INFO L231 Difference]: Finished difference. Result has 286 places, 382 transitions, 5878 flow [2024-06-21 16:41:37,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5878, PETRI_PLACES=286, PETRI_TRANSITIONS=382} [2024-06-21 16:41:37,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-21 16:41:37,354 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 382 transitions, 5878 flow [2024-06-21 16:41:37,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:37,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:37,354 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 16:41:37,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:41:37,354 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:37,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2045985074, now seen corresponding path program 3 times [2024-06-21 16:41:37,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:37,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75453729] [2024-06-21 16:41:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:37,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:37,934 INFO 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 16:41:37,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:37,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75453729] [2024-06-21 16:41:37,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75453729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:37,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:37,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:41:37,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578979212] [2024-06-21 16:41:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:37,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:41:37,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:37,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:41:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:41:38,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:38,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 382 transitions, 5878 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:38,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:38,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:39,808 INFO L124 PetriNetUnfolderBase]: 4810/7409 cut-off events. [2024-06-21 16:41:39,808 INFO L125 PetriNetUnfolderBase]: For 983822/983822 co-relation queries the response was YES. [2024-06-21 16:41:39,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68052 conditions, 7409 events. 4810/7409 cut-off events. For 983822/983822 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43403 event pairs, 1133 based on Foata normal form. 2/7411 useless extension candidates. Maximal degree in co-relation 67917. Up to 7274 conditions per place. [2024-06-21 16:41:39,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 350 selfloop transitions, 51 changer transitions 0/404 dead transitions. [2024-06-21 16:41:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 404 transitions, 6899 flow [2024-06-21 16:41:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:41:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:41:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:41:39,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 16:41:39,939 INFO L175 Difference]: Start difference. First operand has 286 places, 382 transitions, 5878 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:41:39,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 404 transitions, 6899 flow [2024-06-21 16:41:42,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 404 transitions, 6807 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:42,470 INFO L231 Difference]: Finished difference. Result has 290 places, 382 transitions, 5894 flow [2024-06-21 16:41:42,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5786, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5894, PETRI_PLACES=290, PETRI_TRANSITIONS=382} [2024-06-21 16:41:42,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 16:41:42,470 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 382 transitions, 5894 flow [2024-06-21 16:41:42,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:42,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:42,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:42,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:41:42,471 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:42,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:42,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1058593851, now seen corresponding path program 3 times [2024-06-21 16:41:42,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:42,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776944818] [2024-06-21 16:41:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:43,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:43,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776944818] [2024-06-21 16:41:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776944818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:43,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:43,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402760107] [2024-06-21 16:41:43,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:43,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:43,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 382 transitions, 5894 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:43,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:43,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:43,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:44,948 INFO L124 PetriNetUnfolderBase]: 4820/7425 cut-off events. [2024-06-21 16:41:44,948 INFO L125 PetriNetUnfolderBase]: For 1006231/1006239 co-relation queries the response was YES. [2024-06-21 16:41:45,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68485 conditions, 7425 events. 4820/7425 cut-off events. For 1006231/1006239 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43539 event pairs, 1142 based on Foata normal form. 10/7435 useless extension candidates. Maximal degree in co-relation 68348. Up to 7262 conditions per place. [2024-06-21 16:41:45,076 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 351 selfloop transitions, 50 changer transitions 0/404 dead transitions. [2024-06-21 16:41:45,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 404 transitions, 7135 flow [2024-06-21 16:41:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-21 16:41:45,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-21 16:41:45,078 INFO L175 Difference]: Start difference. First operand has 290 places, 382 transitions, 5894 flow. Second operand 7 states and 116 transitions. [2024-06-21 16:41:45,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 404 transitions, 7135 flow [2024-06-21 16:41:47,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 404 transitions, 7021 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:41:47,379 INFO L231 Difference]: Finished difference. Result has 290 places, 386 transitions, 5970 flow [2024-06-21 16:41:47,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5970, PETRI_PLACES=290, PETRI_TRANSITIONS=386} [2024-06-21 16:41:47,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-21 16:41:47,380 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 386 transitions, 5970 flow [2024-06-21 16:41:47,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:47,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:47,380 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 16:41:47,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:41:47,380 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:47,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:47,380 INFO L85 PathProgramCache]: Analyzing trace with hash -160962133, now seen corresponding path program 4 times [2024-06-21 16:41:47,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:47,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602108740] [2024-06-21 16:41:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:47,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:47,890 INFO 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 16:41:47,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:47,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602108740] [2024-06-21 16:41:47,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602108740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:47,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:47,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:47,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757380620] [2024-06-21 16:41:47,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:47,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:47,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:47,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:47,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:47,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:47,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 386 transitions, 5970 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:47,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:47,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:47,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:49,328 INFO L124 PetriNetUnfolderBase]: 4822/7428 cut-off events. [2024-06-21 16:41:49,328 INFO L125 PetriNetUnfolderBase]: For 1024878/1024886 co-relation queries the response was YES. [2024-06-21 16:41:49,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68783 conditions, 7428 events. 4822/7428 cut-off events. For 1024878/1024886 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43491 event pairs, 1146 based on Foata normal form. 10/7438 useless extension candidates. Maximal degree in co-relation 68645. Up to 7263 conditions per place. [2024-06-21 16:41:49,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 56 changer transitions 0/403 dead transitions. [2024-06-21 16:41:49,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 403 transitions, 7037 flow [2024-06-21 16:41:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-21 16:41:49,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:41:49,431 INFO L175 Difference]: Start difference. First operand has 290 places, 386 transitions, 5970 flow. Second operand 7 states and 112 transitions. [2024-06-21 16:41:49,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 403 transitions, 7037 flow [2024-06-21 16:41:51,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 403 transitions, 6942 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:51,451 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 6069 flow [2024-06-21 16:41:51,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5877, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6069, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-21 16:41:51,451 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-21 16:41:51,451 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 6069 flow [2024-06-21 16:41:51,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:51,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:51,451 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 16:41:51,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:41:51,452 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 16:41:51,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1524550037, now seen corresponding path program 6 times [2024-06-21 16:41:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:51,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180275350] [2024-06-21 16:41:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:51,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:52,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:52,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:52,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180275350] [2024-06-21 16:41:52,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180275350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:52,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:52,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:52,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92296669] [2024-06-21 16:41:52,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:52,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:52,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:52,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 6069 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:52,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:52,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:54,091 INFO L124 PetriNetUnfolderBase]: 4789/7380 cut-off events. [2024-06-21 16:41:54,091 INFO L125 PetriNetUnfolderBase]: For 1043679/1043685 co-relation queries the response was YES. [2024-06-21 16:41:54,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67316 conditions, 7380 events. 4789/7380 cut-off events. For 1043679/1043685 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43262 event pairs, 1026 based on Foata normal form. 22/7402 useless extension candidates. Maximal degree in co-relation 67177. Up to 6673 conditions per place. [2024-06-21 16:41:54,196 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 121 changer transitions 0/426 dead transitions. [2024-06-21 16:41:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 426 transitions, 7206 flow [2024-06-21 16:41:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:41:54,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:41:54,197 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 6069 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:41:54,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 426 transitions, 7206 flow [2024-06-21 16:41:56,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 426 transitions, 7041 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:56,434 INFO L231 Difference]: Finished difference. Result has 299 places, 391 transitions, 6196 flow [2024-06-21 16:41:56,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5904, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6196, PETRI_PLACES=299, PETRI_TRANSITIONS=391} [2024-06-21 16:41:56,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-21 16:41:56,435 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 391 transitions, 6196 flow [2024-06-21 16:41:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:56,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:56,435 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 16:41:56,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:41:56,435 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 16:41:56,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:56,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1384174553, now seen corresponding path program 7 times [2024-06-21 16:41:56,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:56,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654280419] [2024-06-21 16:41:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:56,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:57,427 INFO 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 16:41:57,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:57,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654280419] [2024-06-21 16:41:57,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654280419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:57,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:57,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:41:57,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397651035] [2024-06-21 16:41:57,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:57,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:41:57,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:41:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:41:57,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:41:57,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 391 transitions, 6196 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:57,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:57,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:41:57,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:59,138 INFO L124 PetriNetUnfolderBase]: 4763/7342 cut-off events. [2024-06-21 16:41:59,138 INFO L125 PetriNetUnfolderBase]: For 1010187/1010193 co-relation queries the response was YES. [2024-06-21 16:41:59,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66028 conditions, 7342 events. 4763/7342 cut-off events. For 1010187/1010193 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 43008 event pairs, 1016 based on Foata normal form. 22/7364 useless extension candidates. Maximal degree in co-relation 65887. Up to 6582 conditions per place. [2024-06-21 16:41:59,238 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 106 changer transitions 0/429 dead transitions. [2024-06-21 16:41:59,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 429 transitions, 7505 flow [2024-06-21 16:41:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:41:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:41:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 16:41:59,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-21 16:41:59,239 INFO L175 Difference]: Start difference. First operand has 299 places, 391 transitions, 6196 flow. Second operand 9 states and 159 transitions. [2024-06-21 16:41:59,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 429 transitions, 7505 flow [2024-06-21 16:42:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 429 transitions, 7147 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:01,689 INFO L231 Difference]: Finished difference. Result has 302 places, 393 transitions, 6103 flow [2024-06-21 16:42:01,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5838, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6103, PETRI_PLACES=302, PETRI_TRANSITIONS=393} [2024-06-21 16:42:01,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 16:42:01,689 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 393 transitions, 6103 flow [2024-06-21 16:42:01,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:01,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:01,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:42:01,690 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 16:42:01,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1384059233, now seen corresponding path program 8 times [2024-06-21 16:42:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303874659] [2024-06-21 16:42:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:02,809 INFO 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 16:42:02,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:02,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303874659] [2024-06-21 16:42:02,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303874659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:02,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:02,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 16:42:02,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251483761] [2024-06-21 16:42:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:02,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 16:42:02,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:02,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 16:42:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 16:42:02,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:02,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 393 transitions, 6103 flow. Second operand has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:42:02,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:02,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:02,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:04,539 INFO L124 PetriNetUnfolderBase]: 4770/7355 cut-off events. [2024-06-21 16:42:04,539 INFO L125 PetriNetUnfolderBase]: For 997284/997290 co-relation queries the response was YES. [2024-06-21 16:42:04,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65122 conditions, 7355 events. 4770/7355 cut-off events. For 997284/997290 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 42958 event pairs, 923 based on Foata normal form. 22/7377 useless extension candidates. Maximal degree in co-relation 64979. Up to 5641 conditions per place. [2024-06-21 16:42:04,642 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 292 selfloop transitions, 145 changer transitions 0/440 dead transitions. [2024-06-21 16:42:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 440 transitions, 7709 flow [2024-06-21 16:42:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:42:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:42:04,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-21 16:42:04,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-21 16:42:04,643 INFO L175 Difference]: Start difference. First operand has 302 places, 393 transitions, 6103 flow. Second operand 10 states and 183 transitions. [2024-06-21 16:42:04,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 440 transitions, 7709 flow [2024-06-21 16:42:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 440 transitions, 7439 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:06,903 INFO L231 Difference]: Finished difference. Result has 304 places, 393 transitions, 6058 flow [2024-06-21 16:42:06,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5711, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6058, PETRI_PLACES=304, PETRI_TRANSITIONS=393} [2024-06-21 16:42:06,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 16:42:06,903 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 393 transitions, 6058 flow [2024-06-21 16:42:06,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.25) internal successors, (99), 12 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 16:42:06,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:06,904 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 16:42:06,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:42:06,904 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:06,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 893646311, now seen corresponding path program 5 times [2024-06-21 16:42:06,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:06,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489870672] [2024-06-21 16:42:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489870672] [2024-06-21 16:42:07,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489870672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087546024] [2024-06-21 16:42:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:07,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:07,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 393 transitions, 6058 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:07,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:07,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:07,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:08,890 INFO L124 PetriNetUnfolderBase]: 4726/7279 cut-off events. [2024-06-21 16:42:08,890 INFO L125 PetriNetUnfolderBase]: For 963051/963059 co-relation queries the response was YES. [2024-06-21 16:42:08,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64939 conditions, 7279 events. 4726/7279 cut-off events. For 963051/963059 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 42468 event pairs, 1085 based on Foata normal form. 9/7288 useless extension candidates. Maximal degree in co-relation 64795. Up to 7228 conditions per place. [2024-06-21 16:42:08,986 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 374 selfloop transitions, 27 changer transitions 0/404 dead transitions. [2024-06-21 16:42:08,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 404 transitions, 7054 flow [2024-06-21 16:42:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-21 16:42:08,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588850174216028 [2024-06-21 16:42:08,987 INFO L175 Difference]: Start difference. First operand has 304 places, 393 transitions, 6058 flow. Second operand 7 states and 103 transitions. [2024-06-21 16:42:08,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 404 transitions, 7054 flow [2024-06-21 16:42:11,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 404 transitions, 6649 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:11,086 INFO L231 Difference]: Finished difference. Result has 304 places, 393 transitions, 5713 flow [2024-06-21 16:42:11,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5713, PETRI_PLACES=304, PETRI_TRANSITIONS=393} [2024-06-21 16:42:11,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 16:42:11,086 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 393 transitions, 5713 flow [2024-06-21 16:42:11,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:11,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:11,086 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 16:42:11,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:42:11,087 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:11,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:11,087 INFO L85 PathProgramCache]: Analyzing trace with hash 38132267, now seen corresponding path program 6 times [2024-06-21 16:42:11,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:11,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608173950] [2024-06-21 16:42:11,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:11,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:11,538 INFO 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 16:42:11,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:11,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608173950] [2024-06-21 16:42:11,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608173950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:11,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:11,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:11,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053120841] [2024-06-21 16:42:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:11,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:11,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 393 transitions, 5713 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:11,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:11,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:12,961 INFO L124 PetriNetUnfolderBase]: 4682/7206 cut-off events. [2024-06-21 16:42:12,961 INFO L125 PetriNetUnfolderBase]: For 960147/960155 co-relation queries the response was YES. [2024-06-21 16:42:13,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62928 conditions, 7206 events. 4682/7206 cut-off events. For 960147/960155 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41951 event pairs, 1077 based on Foata normal form. 9/7215 useless extension candidates. Maximal degree in co-relation 62783. Up to 7165 conditions per place. [2024-06-21 16:42:13,064 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 381 selfloop transitions, 19 changer transitions 0/403 dead transitions. [2024-06-21 16:42:13,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 403 transitions, 6537 flow [2024-06-21 16:42:13,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:13,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:13,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2024-06-21 16:42:13,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519163763066202 [2024-06-21 16:42:13,065 INFO L175 Difference]: Start difference. First operand has 304 places, 393 transitions, 5713 flow. Second operand 7 states and 101 transitions. [2024-06-21 16:42:13,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 403 transitions, 6537 flow [2024-06-21 16:42:15,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 403 transitions, 6312 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 16:42:15,661 INFO L231 Difference]: Finished difference. Result has 302 places, 393 transitions, 5532 flow [2024-06-21 16:42:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5488, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5532, PETRI_PLACES=302, PETRI_TRANSITIONS=393} [2024-06-21 16:42:15,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 16:42:15,661 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 393 transitions, 5532 flow [2024-06-21 16:42:15,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:15,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:15,662 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 16:42:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:42:15,662 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1053027865, now seen corresponding path program 2 times [2024-06-21 16:42:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728415338] [2024-06-21 16:42:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:15,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:15,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:16,200 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 16:42:16,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728415338] [2024-06-21 16:42:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728415338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:16,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:16,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:16,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115879349] [2024-06-21 16:42:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:16,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:16,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:16,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:16,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 393 transitions, 5532 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:16,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:16,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:16,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:17,760 INFO L124 PetriNetUnfolderBase]: 4692/7220 cut-off events. [2024-06-21 16:42:17,761 INFO L125 PetriNetUnfolderBase]: For 963426/963434 co-relation queries the response was YES. [2024-06-21 16:42:17,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62893 conditions, 7220 events. 4692/7220 cut-off events. For 963426/963434 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42009 event pairs, 1081 based on Foata normal form. 10/7230 useless extension candidates. Maximal degree in co-relation 62747. Up to 7139 conditions per place. [2024-06-21 16:42:17,858 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 37 changer transitions 0/411 dead transitions. [2024-06-21 16:42:17,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 411 transitions, 6604 flow [2024-06-21 16:42:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:17,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 16:42:17,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:42:17,859 INFO L175 Difference]: Start difference. First operand has 302 places, 393 transitions, 5532 flow. Second operand 8 states and 120 transitions. [2024-06-21 16:42:17,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 411 transitions, 6604 flow [2024-06-21 16:42:19,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 411 transitions, 6522 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:19,930 INFO L231 Difference]: Finished difference. Result has 302 places, 396 transitions, 5576 flow [2024-06-21 16:42:19,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5576, PETRI_PLACES=302, PETRI_TRANSITIONS=396} [2024-06-21 16:42:19,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-21 16:42:19,930 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 396 transitions, 5576 flow [2024-06-21 16:42:19,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:19,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:19,931 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 16:42:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:42:19,931 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:19,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:19,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1053027462, now seen corresponding path program 4 times [2024-06-21 16:42:19,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:19,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126847925] [2024-06-21 16:42:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:19,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:20,488 INFO 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 16:42:20,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:20,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126847925] [2024-06-21 16:42:20,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126847925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:20,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:20,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:20,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148477879] [2024-06-21 16:42:20,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:20,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:20,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:20,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:20,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:20,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 396 transitions, 5576 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:22,324 INFO L124 PetriNetUnfolderBase]: 4718/7259 cut-off events. [2024-06-21 16:42:22,324 INFO L125 PetriNetUnfolderBase]: For 992988/992992 co-relation queries the response was YES. [2024-06-21 16:42:22,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63544 conditions, 7259 events. 4718/7259 cut-off events. For 992988/992992 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 42225 event pairs, 1095 based on Foata normal form. 4/7263 useless extension candidates. Maximal degree in co-relation 63397. Up to 7108 conditions per place. [2024-06-21 16:42:22,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 55 changer transitions 0/420 dead transitions. [2024-06-21 16:42:22,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 420 transitions, 6885 flow [2024-06-21 16:42:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-21 16:42:22,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-21 16:42:22,431 INFO L175 Difference]: Start difference. First operand has 302 places, 396 transitions, 5576 flow. Second operand 8 states and 125 transitions. [2024-06-21 16:42:22,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 420 transitions, 6885 flow [2024-06-21 16:42:24,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 420 transitions, 6773 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:24,425 INFO L231 Difference]: Finished difference. Result has 304 places, 402 transitions, 5658 flow [2024-06-21 16:42:24,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5658, PETRI_PLACES=304, PETRI_TRANSITIONS=402} [2024-06-21 16:42:24,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-21 16:42:24,426 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 402 transitions, 5658 flow [2024-06-21 16:42:24,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:24,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:24,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:24,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:42:24,426 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 16:42:24,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:24,427 INFO L85 PathProgramCache]: Analyzing trace with hash 32622110, now seen corresponding path program 5 times [2024-06-21 16:42:24,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:24,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383043566] [2024-06-21 16:42:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:24,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:24,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:24,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383043566] [2024-06-21 16:42:24,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383043566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:24,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:24,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:24,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751458371] [2024-06-21 16:42:24,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:24,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:25,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:25,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 402 transitions, 5658 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:25,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:25,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:25,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:26,597 INFO L124 PetriNetUnfolderBase]: 4712/7251 cut-off events. [2024-06-21 16:42:26,597 INFO L125 PetriNetUnfolderBase]: For 1007103/1007107 co-relation queries the response was YES. [2024-06-21 16:42:26,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63577 conditions, 7251 events. 4712/7251 cut-off events. For 1007103/1007107 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42187 event pairs, 1095 based on Foata normal form. 4/7255 useless extension candidates. Maximal degree in co-relation 63429. Up to 7103 conditions per place. [2024-06-21 16:42:26,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 56 changer transitions 0/418 dead transitions. [2024-06-21 16:42:26,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 418 transitions, 6709 flow [2024-06-21 16:42:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 16:42:26,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-21 16:42:26,692 INFO L175 Difference]: Start difference. First operand has 304 places, 402 transitions, 5658 flow. Second operand 8 states and 122 transitions. [2024-06-21 16:42:26,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 418 transitions, 6709 flow [2024-06-21 16:42:28,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 418 transitions, 6549 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:28,858 INFO L231 Difference]: Finished difference. Result has 307 places, 402 transitions, 5617 flow [2024-06-21 16:42:28,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5617, PETRI_PLACES=307, PETRI_TRANSITIONS=402} [2024-06-21 16:42:28,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 16:42:28,858 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 402 transitions, 5617 flow [2024-06-21 16:42:28,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:28,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:28,858 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 16:42:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:42:28,859 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 16:42:28,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash 156570309, now seen corresponding path program 3 times [2024-06-21 16:42:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:28,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171249395] [2024-06-21 16:42:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:29,416 INFO 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 16:42:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171249395] [2024-06-21 16:42:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171249395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:29,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:29,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251001006] [2024-06-21 16:42:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:29,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:29,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 402 transitions, 5617 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:29,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:29,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:29,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:30,973 INFO L124 PetriNetUnfolderBase]: 4722/7260 cut-off events. [2024-06-21 16:42:30,973 INFO L125 PetriNetUnfolderBase]: For 1027924/1027924 co-relation queries the response was YES. [2024-06-21 16:42:31,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63868 conditions, 7260 events. 4722/7260 cut-off events. For 1027924/1027924 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42268 event pairs, 1074 based on Foata normal form. 2/7262 useless extension candidates. Maximal degree in co-relation 63719. Up to 7228 conditions per place. [2024-06-21 16:42:31,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 19 changer transitions 0/417 dead transitions. [2024-06-21 16:42:31,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 417 transitions, 6521 flow [2024-06-21 16:42:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 16:42:31,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-21 16:42:31,071 INFO L175 Difference]: Start difference. First operand has 307 places, 402 transitions, 5617 flow. Second operand 8 states and 112 transitions. [2024-06-21 16:42:31,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 417 transitions, 6521 flow [2024-06-21 16:42:33,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 417 transitions, 6387 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:33,981 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5580 flow [2024-06-21 16:42:33,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5483, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5580, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-21 16:42:33,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:42:33,981 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5580 flow [2024-06-21 16:42:33,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:33,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:33,982 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 16:42:33,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:42:33,982 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:33,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:33,982 INFO L85 PathProgramCache]: Analyzing trace with hash 45520683, now seen corresponding path program 4 times [2024-06-21 16:42:33,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:33,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080305034] [2024-06-21 16:42:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:33,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080305034] [2024-06-21 16:42:34,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080305034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:34,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577572336] [2024-06-21 16:42:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:34,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:34,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:34,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:34,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5580 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:34,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:34,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:34,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:36,149 INFO L124 PetriNetUnfolderBase]: 4716/7254 cut-off events. [2024-06-21 16:42:36,150 INFO L125 PetriNetUnfolderBase]: For 1042034/1042042 co-relation queries the response was YES. [2024-06-21 16:42:36,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63788 conditions, 7254 events. 4716/7254 cut-off events. For 1042034/1042042 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 42222 event pairs, 1080 based on Foata normal form. 10/7264 useless extension candidates. Maximal degree in co-relation 63638. Up to 7172 conditions per place. [2024-06-21 16:42:36,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 375 selfloop transitions, 41 changer transitions 0/419 dead transitions. [2024-06-21 16:42:36,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 419 transitions, 6450 flow [2024-06-21 16:42:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 16:42:36,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-21 16:42:36,259 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5580 flow. Second operand 8 states and 118 transitions. [2024-06-21 16:42:36,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 419 transitions, 6450 flow [2024-06-21 16:42:39,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 419 transitions, 6319 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-21 16:42:39,058 INFO L231 Difference]: Finished difference. Result has 307 places, 405 transitions, 5537 flow [2024-06-21 16:42:39,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5449, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5537, PETRI_PLACES=307, PETRI_TRANSITIONS=405} [2024-06-21 16:42:39,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-21 16:42:39,058 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 405 transitions, 5537 flow [2024-06-21 16:42:39,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:39,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:39,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:39,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:42:39,058 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 16:42:39,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash 45520280, now seen corresponding path program 6 times [2024-06-21 16:42:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:39,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051939344] [2024-06-21 16:42:39,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:39,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:39,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051939344] [2024-06-21 16:42:39,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051939344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:39,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:39,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:39,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994090981] [2024-06-21 16:42:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:39,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:39,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:39,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:42:39,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 405 transitions, 5537 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:39,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:39,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:42:39,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:41,220 INFO L124 PetriNetUnfolderBase]: 4710/7249 cut-off events. [2024-06-21 16:42:41,220 INFO L125 PetriNetUnfolderBase]: For 1055779/1055783 co-relation queries the response was YES. [2024-06-21 16:42:41,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63751 conditions, 7249 events. 4710/7249 cut-off events. For 1055779/1055783 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42172 event pairs, 1093 based on Foata normal form. 4/7253 useless extension candidates. Maximal degree in co-relation 63602. Up to 7104 conditions per place. [2024-06-21 16:42:41,315 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 60 changer transitions 0/418 dead transitions. [2024-06-21 16:42:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 418 transitions, 6401 flow [2024-06-21 16:42:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 16:42:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:42:41,316 INFO L175 Difference]: Start difference. First operand has 307 places, 405 transitions, 5537 flow. Second operand 8 states and 120 transitions. [2024-06-21 16:42:41,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 418 transitions, 6401 flow [2024-06-21 16:42:43,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 418 transitions, 6274 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:43,903 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5536 flow [2024-06-21 16:42:43,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5536, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-21 16:42:43,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:42:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5536 flow [2024-06-21 16:42:43,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:43,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:43,904 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 16:42:43,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:42:43,904 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:43,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:43,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1822785077, now seen corresponding path program 1 times [2024-06-21 16:42:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2151767] [2024-06-21 16:42:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:43,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:44,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2151767] [2024-06-21 16:42:44,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2151767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:44,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:44,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:44,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081985664] [2024-06-21 16:42:44,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:44,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:44,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:44,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:44,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5536 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:44,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:44,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:44,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:46,064 INFO L124 PetriNetUnfolderBase]: 4536/7068 cut-off events. [2024-06-21 16:42:46,065 INFO L125 PetriNetUnfolderBase]: For 939924/939928 co-relation queries the response was YES. [2024-06-21 16:42:46,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60140 conditions, 7068 events. 4536/7068 cut-off events. For 939924/939928 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41917 event pairs, 1002 based on Foata normal form. 1/7061 useless extension candidates. Maximal degree in co-relation 59990. Up to 6905 conditions per place. [2024-06-21 16:42:46,162 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 382 selfloop transitions, 26 changer transitions 0/422 dead transitions. [2024-06-21 16:42:46,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 422 transitions, 6394 flow [2024-06-21 16:42:46,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:42:46,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:42:46,163 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5536 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:42:46,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 422 transitions, 6394 flow [2024-06-21 16:42:48,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 422 transitions, 6244 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:48,404 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 5445 flow [2024-06-21 16:42:48,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5445, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-06-21 16:42:48,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:42:48,405 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 5445 flow [2024-06-21 16:42:48,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:48,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:48,405 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 16:42:48,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:42:48,405 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:48,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1818970062, now seen corresponding path program 1 times [2024-06-21 16:42:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74535815] [2024-06-21 16:42:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:48,983 INFO 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 16:42:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:48,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74535815] [2024-06-21 16:42:48,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74535815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:48,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:48,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:48,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570090265] [2024-06-21 16:42:48,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:48,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:48,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:49,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:49,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 5445 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:49,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:49,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:49,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:50,406 INFO L124 PetriNetUnfolderBase]: 4523/7052 cut-off events. [2024-06-21 16:42:50,406 INFO L125 PetriNetUnfolderBase]: For 957315/957319 co-relation queries the response was YES. [2024-06-21 16:42:50,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60093 conditions, 7052 events. 4523/7052 cut-off events. For 957315/957319 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41863 event pairs, 1000 based on Foata normal form. 2/7046 useless extension candidates. Maximal degree in co-relation 59942. Up to 6850 conditions per place. [2024-06-21 16:42:50,504 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 377 selfloop transitions, 35 changer transitions 0/426 dead transitions. [2024-06-21 16:42:50,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 426 transitions, 6549 flow [2024-06-21 16:42:50,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:42:50,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 16:42:50,504 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 5445 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:42:50,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 426 transitions, 6549 flow [2024-06-21 16:42:52,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 426 transitions, 6362 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:52,753 INFO L231 Difference]: Finished difference. Result has 308 places, 408 transitions, 5382 flow [2024-06-21 16:42:52,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5258, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5382, PETRI_PLACES=308, PETRI_TRANSITIONS=408} [2024-06-21 16:42:52,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-21 16:42:52,753 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 408 transitions, 5382 flow [2024-06-21 16:42:52,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:52,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:52,753 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 16:42:52,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:42:52,754 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:52,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:52,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1818975642, now seen corresponding path program 2 times [2024-06-21 16:42:52,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:52,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422734554] [2024-06-21 16:42:52,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:52,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:53,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:53,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422734554] [2024-06-21 16:42:53,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422734554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:53,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:53,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:53,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251718296] [2024-06-21 16:42:53,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:53,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:53,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:53,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:53,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:53,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 408 transitions, 5382 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:53,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:53,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:53,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:54,649 INFO L124 PetriNetUnfolderBase]: 4556/7098 cut-off events. [2024-06-21 16:42:54,649 INFO L125 PetriNetUnfolderBase]: For 981344/981348 co-relation queries the response was YES. [2024-06-21 16:42:54,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 7098 events. 4556/7098 cut-off events. For 981344/981348 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42111 event pairs, 1000 based on Foata normal form. 2/7092 useless extension candidates. Maximal degree in co-relation 60313. Up to 6884 conditions per place. [2024-06-21 16:42:54,741 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 376 selfloop transitions, 41 changer transitions 0/431 dead transitions. [2024-06-21 16:42:54,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 431 transitions, 6510 flow [2024-06-21 16:42:54,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:54,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:54,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 16:42:54,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-21 16:42:54,742 INFO L175 Difference]: Start difference. First operand has 308 places, 408 transitions, 5382 flow. Second operand 7 states and 122 transitions. [2024-06-21 16:42:54,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 431 transitions, 6510 flow [2024-06-21 16:42:57,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 431 transitions, 6398 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:57,643 INFO L231 Difference]: Finished difference. Result has 309 places, 411 transitions, 5412 flow [2024-06-21 16:42:57,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5412, PETRI_PLACES=309, PETRI_TRANSITIONS=411} [2024-06-21 16:42:57,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-21 16:42:57,644 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 411 transitions, 5412 flow [2024-06-21 16:42:57,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:57,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:57,644 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 16:42:57,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:42:57,644 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:57,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:57,645 INFO L85 PathProgramCache]: Analyzing trace with hash -819772878, now seen corresponding path program 3 times [2024-06-21 16:42:57,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:57,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512922904] [2024-06-21 16:42:57,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:57,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:58,203 INFO 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 16:42:58,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:58,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512922904] [2024-06-21 16:42:58,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512922904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:58,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:58,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:58,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689567450] [2024-06-21 16:42:58,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:58,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:42:58,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 411 transitions, 5412 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:58,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:58,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:42:58,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:59,661 INFO L124 PetriNetUnfolderBase]: 4543/7080 cut-off events. [2024-06-21 16:42:59,661 INFO L125 PetriNetUnfolderBase]: For 998210/998214 co-relation queries the response was YES. [2024-06-21 16:42:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60438 conditions, 7080 events. 4543/7080 cut-off events. For 998210/998214 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 42054 event pairs, 1000 based on Foata normal form. 2/7074 useless extension candidates. Maximal degree in co-relation 60286. Up to 6936 conditions per place. [2024-06-21 16:42:59,759 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 24 changer transitions 0/428 dead transitions. [2024-06-21 16:42:59,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 428 transitions, 6332 flow [2024-06-21 16:42:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:59,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 16:42:59,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-21 16:42:59,760 INFO L175 Difference]: Start difference. First operand has 309 places, 411 transitions, 5412 flow. Second operand 8 states and 122 transitions. [2024-06-21 16:42:59,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 428 transitions, 6332 flow [2024-06-21 16:43:02,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 428 transitions, 6223 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 16:43:02,434 INFO L231 Difference]: Finished difference. Result has 313 places, 414 transitions, 5417 flow [2024-06-21 16:43:02,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5310, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5417, PETRI_PLACES=313, PETRI_TRANSITIONS=414} [2024-06-21 16:43:02,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-21 16:43:02,435 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 414 transitions, 5417 flow [2024-06-21 16:43:02,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:02,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:02,435 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 16:43:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:43:02,435 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:02,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash 156309134, now seen corresponding path program 4 times [2024-06-21 16:43:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286934644] [2024-06-21 16:43:02,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:02,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:02,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:03,001 INFO 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 16:43:03,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:03,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286934644] [2024-06-21 16:43:03,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286934644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:03,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:03,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:03,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442975762] [2024-06-21 16:43:03,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:03,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:03,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:03,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:03,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:03,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:43:03,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 414 transitions, 5417 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:03,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:03,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:43:03,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:04,492 INFO L124 PetriNetUnfolderBase]: 4545/7082 cut-off events. [2024-06-21 16:43:04,492 INFO L125 PetriNetUnfolderBase]: For 1011986/1011990 co-relation queries the response was YES. [2024-06-21 16:43:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60359 conditions, 7082 events. 4545/7082 cut-off events. For 1011986/1011990 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42012 event pairs, 1001 based on Foata normal form. 3/7077 useless extension candidates. Maximal degree in co-relation 60206. Up to 6943 conditions per place. [2024-06-21 16:43:04,598 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 19 changer transitions 0/427 dead transitions. [2024-06-21 16:43:04,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 427 transitions, 6277 flow [2024-06-21 16:43:04,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-21 16:43:04,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-21 16:43:04,599 INFO L175 Difference]: Start difference. First operand has 313 places, 414 transitions, 5417 flow. Second operand 8 states and 119 transitions. [2024-06-21 16:43:04,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 427 transitions, 6277 flow [2024-06-21 16:43:08,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 427 transitions, 6179 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:08,203 INFO L231 Difference]: Finished difference. Result has 315 places, 414 transitions, 5363 flow [2024-06-21 16:43:08,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5363, PETRI_PLACES=315, PETRI_TRANSITIONS=414} [2024-06-21 16:43:08,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 16:43:08,203 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 414 transitions, 5363 flow [2024-06-21 16:43:08,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:08,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:08,204 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 16:43:08,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:43:08,204 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 16:43:08,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash 45982025, now seen corresponding path program 1 times [2024-06-21 16:43:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185950310] [2024-06-21 16:43:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:09,052 INFO 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 16:43:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:09,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185950310] [2024-06-21 16:43:09,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185950310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:09,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:09,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728747177] [2024-06-21 16:43:09,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:09,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:09,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 414 transitions, 5363 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:09,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:09,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:09,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:10,723 INFO L124 PetriNetUnfolderBase]: 4738/7284 cut-off events. [2024-06-21 16:43:10,723 INFO L125 PetriNetUnfolderBase]: For 1161599/1161599 co-relation queries the response was YES. [2024-06-21 16:43:10,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64276 conditions, 7284 events. 4738/7284 cut-off events. For 1161599/1161599 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42222 event pairs, 1074 based on Foata normal form. 2/7286 useless extension candidates. Maximal degree in co-relation 64122. Up to 7254 conditions per place. [2024-06-21 16:43:10,829 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 407 selfloop transitions, 18 changer transitions 0/428 dead transitions. [2024-06-21 16:43:10,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 428 transitions, 6281 flow [2024-06-21 16:43:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:10,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 111 transitions. [2024-06-21 16:43:10,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384146341463415 [2024-06-21 16:43:10,830 INFO L175 Difference]: Start difference. First operand has 315 places, 414 transitions, 5363 flow. Second operand 8 states and 111 transitions. [2024-06-21 16:43:10,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 428 transitions, 6281 flow [2024-06-21 16:43:14,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 428 transitions, 6188 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:14,572 INFO L231 Difference]: Finished difference. Result has 315 places, 416 transitions, 5355 flow [2024-06-21 16:43:14,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5355, PETRI_PLACES=315, PETRI_TRANSITIONS=416} [2024-06-21 16:43:14,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-21 16:43:14,572 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 416 transitions, 5355 flow [2024-06-21 16:43:14,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:14,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:14,572 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 16:43:14,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:43:14,572 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 16:43:14,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:14,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1203718255, now seen corresponding path program 1 times [2024-06-21 16:43:14,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:14,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661141279] [2024-06-21 16:43:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:15,328 INFO 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 16:43:15,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661141279] [2024-06-21 16:43:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661141279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:15,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:15,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592366817] [2024-06-21 16:43:15,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:15,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:15,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:15,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 416 transitions, 5355 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:15,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:15,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:15,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:17,186 INFO L124 PetriNetUnfolderBase]: 4746/7296 cut-off events. [2024-06-21 16:43:17,186 INFO L125 PetriNetUnfolderBase]: For 1183960/1183960 co-relation queries the response was YES. [2024-06-21 16:43:17,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64640 conditions, 7296 events. 4746/7296 cut-off events. For 1183960/1183960 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42184 event pairs, 931 based on Foata normal form. 2/7298 useless extension candidates. Maximal degree in co-relation 64485. Up to 7159 conditions per place. [2024-06-21 16:43:17,276 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 405 selfloop transitions, 39 changer transitions 0/447 dead transitions. [2024-06-21 16:43:17,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 447 transitions, 6538 flow [2024-06-21 16:43:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-21 16:43:17,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-21 16:43:17,277 INFO L175 Difference]: Start difference. First operand has 315 places, 416 transitions, 5355 flow. Second operand 8 states and 131 transitions. [2024-06-21 16:43:17,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 447 transitions, 6538 flow [2024-06-21 16:43:21,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 447 transitions, 6469 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:21,397 INFO L231 Difference]: Finished difference. Result has 317 places, 418 transitions, 5398 flow [2024-06-21 16:43:21,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5398, PETRI_PLACES=317, PETRI_TRANSITIONS=418} [2024-06-21 16:43:21,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-21 16:43:21,397 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 418 transitions, 5398 flow [2024-06-21 16:43:21,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:21,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:21,398 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 16:43:21,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:43:21,398 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 16:43:21,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1294546489, now seen corresponding path program 2 times [2024-06-21 16:43:21,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:21,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623258775] [2024-06-21 16:43:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:22,276 INFO 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 16:43:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623258775] [2024-06-21 16:43:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623258775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640774188] [2024-06-21 16:43:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:22,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:22,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 418 transitions, 5398 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:22,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:22,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:22,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:23,896 INFO L124 PetriNetUnfolderBase]: 4754/7308 cut-off events. [2024-06-21 16:43:23,897 INFO L125 PetriNetUnfolderBase]: For 1207369/1207369 co-relation queries the response was YES. [2024-06-21 16:43:23,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64986 conditions, 7308 events. 4754/7308 cut-off events. For 1207369/1207369 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42419 event pairs, 1073 based on Foata normal form. 2/7310 useless extension candidates. Maximal degree in co-relation 64830. Up to 7216 conditions per place. [2024-06-21 16:43:24,000 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 405 selfloop transitions, 37 changer transitions 0/445 dead transitions. [2024-06-21 16:43:24,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 445 transitions, 6382 flow [2024-06-21 16:43:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:43:24,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 16:43:24,001 INFO L175 Difference]: Start difference. First operand has 317 places, 418 transitions, 5398 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:43:24,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 445 transitions, 6382 flow [2024-06-21 16:43:26,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 445 transitions, 6284 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:26,744 INFO L231 Difference]: Finished difference. Result has 319 places, 420 transitions, 5416 flow [2024-06-21 16:43:26,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5416, PETRI_PLACES=319, PETRI_TRANSITIONS=420} [2024-06-21 16:43:26,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-21 16:43:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 420 transitions, 5416 flow [2024-06-21 16:43:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:26,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:26,745 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 16:43:26,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:43:26,745 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 16:43:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1291925563, now seen corresponding path program 1 times [2024-06-21 16:43:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854953617] [2024-06-21 16:43:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:26,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:27,266 INFO 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 16:43:27,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:27,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854953617] [2024-06-21 16:43:27,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854953617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:27,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:27,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:27,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124718563] [2024-06-21 16:43:27,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:27,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:27,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:27,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:27,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:27,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:27,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 420 transitions, 5416 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:27,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:27,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:27,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:28,816 INFO L124 PetriNetUnfolderBase]: 4758/7314 cut-off events. [2024-06-21 16:43:28,817 INFO L125 PetriNetUnfolderBase]: For 1232223/1232223 co-relation queries the response was YES. [2024-06-21 16:43:28,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65089 conditions, 7314 events. 4758/7314 cut-off events. For 1232223/1232223 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42492 event pairs, 1066 based on Foata normal form. 4/7318 useless extension candidates. Maximal degree in co-relation 64932. Up to 7143 conditions per place. [2024-06-21 16:43:28,919 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 402 selfloop transitions, 47 changer transitions 0/452 dead transitions. [2024-06-21 16:43:28,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 452 transitions, 6677 flow [2024-06-21 16:43:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:43:28,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:43:28,922 INFO L175 Difference]: Start difference. First operand has 319 places, 420 transitions, 5416 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:43:28,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 452 transitions, 6677 flow [2024-06-21 16:43:32,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 452 transitions, 6588 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:32,875 INFO L231 Difference]: Finished difference. Result has 321 places, 423 transitions, 5520 flow [2024-06-21 16:43:32,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5520, PETRI_PLACES=321, PETRI_TRANSITIONS=423} [2024-06-21 16:43:32,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-21 16:43:32,875 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 423 transitions, 5520 flow [2024-06-21 16:43:32,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:32,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:32,876 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 16:43:32,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:43:32,876 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 16:43:32,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1498779063, now seen corresponding path program 2 times [2024-06-21 16:43:32,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:32,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394544612] [2024-06-21 16:43:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:33,372 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 16:43:33,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:33,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394544612] [2024-06-21 16:43:33,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394544612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:33,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894262879] [2024-06-21 16:43:33,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:33,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:33,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:33,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:33,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:33,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:33,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 423 transitions, 5520 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:33,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:33,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:33,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:34,849 INFO L124 PetriNetUnfolderBase]: 4768/7328 cut-off events. [2024-06-21 16:43:34,849 INFO L125 PetriNetUnfolderBase]: For 1247080/1247080 co-relation queries the response was YES. [2024-06-21 16:43:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65578 conditions, 7328 events. 4768/7328 cut-off events. For 1247080/1247080 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42550 event pairs, 1070 based on Foata normal form. 2/7330 useless extension candidates. Maximal degree in co-relation 65420. Up to 7236 conditions per place. [2024-06-21 16:43:34,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 408 selfloop transitions, 40 changer transitions 0/451 dead transitions. [2024-06-21 16:43:34,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 451 transitions, 6582 flow [2024-06-21 16:43:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:34,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:34,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-21 16:43:34,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-21 16:43:34,950 INFO L175 Difference]: Start difference. First operand has 321 places, 423 transitions, 5520 flow. Second operand 8 states and 127 transitions. [2024-06-21 16:43:34,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 451 transitions, 6582 flow [2024-06-21 16:43:37,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 451 transitions, 6479 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:37,772 INFO L231 Difference]: Finished difference. Result has 324 places, 427 transitions, 5613 flow [2024-06-21 16:43:37,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5421, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5613, PETRI_PLACES=324, PETRI_TRANSITIONS=427} [2024-06-21 16:43:37,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-21 16:43:37,773 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 427 transitions, 5613 flow [2024-06-21 16:43:37,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:37,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:37,773 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 16:43:37,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:43:37,773 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 16:43:37,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1286203707, now seen corresponding path program 1 times [2024-06-21 16:43:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:37,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535202668] [2024-06-21 16:43:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:37,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:38,379 INFO 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 16:43:38,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535202668] [2024-06-21 16:43:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535202668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966907130] [2024-06-21 16:43:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:38,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:38,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 427 transitions, 5613 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:38,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:38,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:38,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:40,234 INFO L124 PetriNetUnfolderBase]: 4788/7356 cut-off events. [2024-06-21 16:43:40,234 INFO L125 PetriNetUnfolderBase]: For 1282215/1282215 co-relation queries the response was YES. [2024-06-21 16:43:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65937 conditions, 7356 events. 4788/7356 cut-off events. For 1282215/1282215 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 42760 event pairs, 1077 based on Foata normal form. 4/7360 useless extension candidates. Maximal degree in co-relation 65778. Up to 7112 conditions per place. [2024-06-21 16:43:40,335 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 72 changer transitions 0/464 dead transitions. [2024-06-21 16:43:40,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 464 transitions, 6919 flow [2024-06-21 16:43:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 16:43:40,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 16:43:40,336 INFO L175 Difference]: Start difference. First operand has 324 places, 427 transitions, 5613 flow. Second operand 9 states and 151 transitions. [2024-06-21 16:43:40,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 464 transitions, 6919 flow [2024-06-21 16:43:43,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 464 transitions, 6817 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:43,529 INFO L231 Difference]: Finished difference. Result has 328 places, 433 transitions, 5763 flow [2024-06-21 16:43:43,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5511, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5763, PETRI_PLACES=328, PETRI_TRANSITIONS=433} [2024-06-21 16:43:43,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-21 16:43:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 433 transitions, 5763 flow [2024-06-21 16:43:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:43,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:43,530 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 16:43:43,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:43:43,530 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 16:43:43,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1176634393, now seen corresponding path program 3 times [2024-06-21 16:43:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:43,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061150842] [2024-06-21 16:43:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:44,063 INFO 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 16:43:44,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:44,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061150842] [2024-06-21 16:43:44,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061150842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:44,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:44,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:44,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330999680] [2024-06-21 16:43:44,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:44,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:44,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:44,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:44,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:44,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:44,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 433 transitions, 5763 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:44,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:44,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:45,965 INFO L124 PetriNetUnfolderBase]: 4818/7398 cut-off events. [2024-06-21 16:43:45,965 INFO L125 PetriNetUnfolderBase]: For 1319474/1319474 co-relation queries the response was YES. [2024-06-21 16:43:46,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67067 conditions, 7398 events. 4818/7398 cut-off events. For 1319474/1319474 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 42948 event pairs, 1043 based on Foata normal form. 6/7404 useless extension candidates. Maximal degree in co-relation 66907. Up to 6864 conditions per place. [2024-06-21 16:43:46,116 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 375 selfloop transitions, 90 changer transitions 0/468 dead transitions. [2024-06-21 16:43:46,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 468 transitions, 7325 flow [2024-06-21 16:43:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:46,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 16:43:46,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-21 16:43:46,118 INFO L175 Difference]: Start difference. First operand has 328 places, 433 transitions, 5763 flow. Second operand 8 states and 140 transitions. [2024-06-21 16:43:46,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 468 transitions, 7325 flow [2024-06-21 16:43:50,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 468 transitions, 7218 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:50,688 INFO L231 Difference]: Finished difference. Result has 331 places, 440 transitions, 6001 flow [2024-06-21 16:43:50,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5656, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6001, PETRI_PLACES=331, PETRI_TRANSITIONS=440} [2024-06-21 16:43:50,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-21 16:43:50,689 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 440 transitions, 6001 flow [2024-06-21 16:43:50,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:50,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:50,689 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 16:43:50,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:43:50,689 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 16:43:50,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:50,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1322167891, now seen corresponding path program 4 times [2024-06-21 16:43:50,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:50,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230105559] [2024-06-21 16:43:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:50,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:51,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:51,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:51,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230105559] [2024-06-21 16:43:51,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230105559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:51,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:51,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:51,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116318663] [2024-06-21 16:43:51,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:51,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:51,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:51,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:51,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:51,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 440 transitions, 6001 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:51,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:51,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:51,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:52,840 INFO L124 PetriNetUnfolderBase]: 4828/7413 cut-off events. [2024-06-21 16:43:52,840 INFO L125 PetriNetUnfolderBase]: For 1330428/1330428 co-relation queries the response was YES. [2024-06-21 16:43:52,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67502 conditions, 7413 events. 4828/7413 cut-off events. For 1330428/1330428 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 43085 event pairs, 1037 based on Foata normal form. 6/7419 useless extension candidates. Maximal degree in co-relation 67340. Up to 6873 conditions per place. [2024-06-21 16:43:52,952 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 370 selfloop transitions, 98 changer transitions 0/471 dead transitions. [2024-06-21 16:43:52,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 471 transitions, 7588 flow [2024-06-21 16:43:52,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:52,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:43:52,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 16:43:52,953 INFO L175 Difference]: Start difference. First operand has 331 places, 440 transitions, 6001 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:43:52,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 471 transitions, 7588 flow [2024-06-21 16:43:57,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 471 transitions, 7401 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:57,361 INFO L231 Difference]: Finished difference. Result has 335 places, 446 transitions, 6230 flow [2024-06-21 16:43:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6230, PETRI_PLACES=335, PETRI_TRANSITIONS=446} [2024-06-21 16:43:57,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-21 16:43:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 446 transitions, 6230 flow [2024-06-21 16:43:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:57,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:57,362 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 16:43:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:43:57,362 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 16:43:57,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1322168263, now seen corresponding path program 1 times [2024-06-21 16:43:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638808078] [2024-06-21 16:43:57,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:57,918 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 16:43:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:57,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638808078] [2024-06-21 16:43:57,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638808078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:57,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:57,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:57,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547341653] [2024-06-21 16:43:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:57,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:57,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:57,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:57,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:43:57,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 446 transitions, 6230 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:57,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:57,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:43:57,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:59,506 INFO L124 PetriNetUnfolderBase]: 4854/7449 cut-off events. [2024-06-21 16:43:59,506 INFO L125 PetriNetUnfolderBase]: For 1345363/1345363 co-relation queries the response was YES. [2024-06-21 16:43:59,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68409 conditions, 7449 events. 4854/7449 cut-off events. For 1345363/1345363 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43299 event pairs, 1071 based on Foata normal form. 2/7451 useless extension candidates. Maximal degree in co-relation 68245. Up to 7337 conditions per place. [2024-06-21 16:43:59,626 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 430 selfloop transitions, 42 changer transitions 0/475 dead transitions. [2024-06-21 16:43:59,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 475 transitions, 7638 flow [2024-06-21 16:43:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-21 16:43:59,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-21 16:43:59,627 INFO L175 Difference]: Start difference. First operand has 335 places, 446 transitions, 6230 flow. Second operand 8 states and 129 transitions. [2024-06-21 16:43:59,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 475 transitions, 7638 flow [2024-06-21 16:44:03,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 475 transitions, 7428 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:03,766 INFO L231 Difference]: Finished difference. Result has 338 places, 453 transitions, 6283 flow [2024-06-21 16:44:03,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6283, PETRI_PLACES=338, PETRI_TRANSITIONS=453} [2024-06-21 16:44:03,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-21 16:44:03,766 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 453 transitions, 6283 flow [2024-06-21 16:44:03,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:03,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:03,766 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 16:44:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:44:03,767 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 16:44:03,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:03,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1896265163, now seen corresponding path program 2 times [2024-06-21 16:44:03,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:03,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952238660] [2024-06-21 16:44:03,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:03,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:04,262 INFO 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 16:44:04,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:04,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952238660] [2024-06-21 16:44:04,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952238660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:04,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750462517] [2024-06-21 16:44:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:04,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:04,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:04,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 453 transitions, 6283 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:04,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:04,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:04,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:05,965 INFO L124 PetriNetUnfolderBase]: 4859/7456 cut-off events. [2024-06-21 16:44:05,965 INFO L125 PetriNetUnfolderBase]: For 1366667/1366667 co-relation queries the response was YES. [2024-06-21 16:44:06,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68764 conditions, 7456 events. 4859/7456 cut-off events. For 1366667/1366667 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 43318 event pairs, 1073 based on Foata normal form. 1/7457 useless extension candidates. Maximal degree in co-relation 68599. Up to 7405 conditions per place. [2024-06-21 16:44:06,067 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 441 selfloop transitions, 29 changer transitions 0/473 dead transitions. [2024-06-21 16:44:06,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 473 transitions, 7343 flow [2024-06-21 16:44:06,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-21 16:44:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-21 16:44:06,068 INFO L175 Difference]: Start difference. First operand has 338 places, 453 transitions, 6283 flow. Second operand 8 states and 120 transitions. [2024-06-21 16:44:06,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 473 transitions, 7343 flow [2024-06-21 16:44:10,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 473 transitions, 7181 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:10,249 INFO L231 Difference]: Finished difference. Result has 342 places, 456 transitions, 6269 flow [2024-06-21 16:44:10,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6133, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6269, PETRI_PLACES=342, PETRI_TRANSITIONS=456} [2024-06-21 16:44:10,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-21 16:44:10,249 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 456 transitions, 6269 flow [2024-06-21 16:44:10,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:10,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:10,249 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 16:44:10,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:44:10,249 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 16:44:10,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:10,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1499299411, now seen corresponding path program 5 times [2024-06-21 16:44:10,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:10,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894821636] [2024-06-21 16:44:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:10,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:10,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:10,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894821636] [2024-06-21 16:44:10,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894821636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:10,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:10,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:10,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623173271] [2024-06-21 16:44:10,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:10,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:10,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:10,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:10,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 456 transitions, 6269 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:10,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:10,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:10,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:12,444 INFO L124 PetriNetUnfolderBase]: 4893/7503 cut-off events. [2024-06-21 16:44:12,444 INFO L125 PetriNetUnfolderBase]: For 1416649/1416649 co-relation queries the response was YES. [2024-06-21 16:44:12,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69889 conditions, 7503 events. 4893/7503 cut-off events. For 1416649/1416649 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 43614 event pairs, 1072 based on Foata normal form. 2/7505 useless extension candidates. Maximal degree in co-relation 69722. Up to 7387 conditions per place. [2024-06-21 16:44:12,564 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 435 selfloop transitions, 48 changer transitions 0/486 dead transitions. [2024-06-21 16:44:12,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 486 transitions, 7773 flow [2024-06-21 16:44:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:44:12,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 16:44:12,565 INFO L175 Difference]: Start difference. First operand has 342 places, 456 transitions, 6269 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:44:12,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 486 transitions, 7773 flow [2024-06-21 16:44:17,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 486 transitions, 7663 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:17,838 INFO L231 Difference]: Finished difference. Result has 345 places, 465 transitions, 6563 flow [2024-06-21 16:44:17,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6563, PETRI_PLACES=345, PETRI_TRANSITIONS=465} [2024-06-21 16:44:17,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-21 16:44:17,838 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 465 transitions, 6563 flow [2024-06-21 16:44:17,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:17,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:17,838 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 16:44:17,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:44:17,839 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 16:44:17,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:17,839 INFO L85 PathProgramCache]: Analyzing trace with hash -999203971, now seen corresponding path program 3 times [2024-06-21 16:44:17,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:17,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661026159] [2024-06-21 16:44:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:17,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661026159] [2024-06-21 16:44:18,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661026159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:18,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:18,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602650924] [2024-06-21 16:44:18,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:18,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:18,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 465 transitions, 6563 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:18,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:18,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:18,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:20,002 INFO L124 PetriNetUnfolderBase]: 4898/7510 cut-off events. [2024-06-21 16:44:20,002 INFO L125 PetriNetUnfolderBase]: For 1437356/1437356 co-relation queries the response was YES. [2024-06-21 16:44:20,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70312 conditions, 7510 events. 4898/7510 cut-off events. For 1437356/1437356 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 43643 event pairs, 1072 based on Foata normal form. 1/7511 useless extension candidates. Maximal degree in co-relation 70143. Up to 7453 conditions per place. [2024-06-21 16:44:20,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 448 selfloop transitions, 34 changer transitions 0/485 dead transitions. [2024-06-21 16:44:20,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 485 transitions, 7641 flow [2024-06-21 16:44:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 16:44:20,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-21 16:44:20,117 INFO L175 Difference]: Start difference. First operand has 345 places, 465 transitions, 6563 flow. Second operand 8 states and 122 transitions. [2024-06-21 16:44:20,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 485 transitions, 7641 flow [2024-06-21 16:44:24,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 485 transitions, 7528 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:24,848 INFO L231 Difference]: Finished difference. Result has 348 places, 468 transitions, 6602 flow [2024-06-21 16:44:24,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6450, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6602, PETRI_PLACES=348, PETRI_TRANSITIONS=468} [2024-06-21 16:44:24,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-21 16:44:24,849 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 468 transitions, 6602 flow [2024-06-21 16:44:24,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:24,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:24,849 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 16:44:24,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:44:24,849 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 16:44:24,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:24,849 INFO L85 PathProgramCache]: Analyzing trace with hash -999324313, now seen corresponding path program 6 times [2024-06-21 16:44:24,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329990834] [2024-06-21 16:44:24,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:25,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329990834] [2024-06-21 16:44:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329990834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:25,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:25,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321899314] [2024-06-21 16:44:25,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:25,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:25,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:25,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:25,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 468 transitions, 6602 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:25,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:25,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:25,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:26,972 INFO L124 PetriNetUnfolderBase]: 4892/7502 cut-off events. [2024-06-21 16:44:26,972 INFO L125 PetriNetUnfolderBase]: For 1457714/1457714 co-relation queries the response was YES. [2024-06-21 16:44:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70239 conditions, 7502 events. 4892/7502 cut-off events. For 1457714/1457714 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 43586 event pairs, 1070 based on Foata normal form. 2/7504 useless extension candidates. Maximal degree in co-relation 70069. Up to 7410 conditions per place. [2024-06-21 16:44:27,090 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 446 selfloop transitions, 38 changer transitions 0/487 dead transitions. [2024-06-21 16:44:27,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 487 transitions, 7623 flow [2024-06-21 16:44:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:27,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:44:27,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:44:27,091 INFO L175 Difference]: Start difference. First operand has 348 places, 468 transitions, 6602 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:44:27,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 487 transitions, 7623 flow [2024-06-21 16:44:32,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 487 transitions, 7497 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:32,436 INFO L231 Difference]: Finished difference. Result has 351 places, 469 transitions, 6571 flow [2024-06-21 16:44:32,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6476, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6571, PETRI_PLACES=351, PETRI_TRANSITIONS=469} [2024-06-21 16:44:32,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-21 16:44:32,437 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 469 transitions, 6571 flow [2024-06-21 16:44:32,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:32,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:32,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:32,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:44:32,437 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 16:44:32,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash -998958327, now seen corresponding path program 2 times [2024-06-21 16:44:32,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:32,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951502251] [2024-06-21 16:44:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:32,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:33,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:33,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951502251] [2024-06-21 16:44:33,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951502251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:33,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:33,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:44:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981357057] [2024-06-21 16:44:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:44:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:44:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:44:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 469 transitions, 6571 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:33,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:35,013 INFO L124 PetriNetUnfolderBase]: 4944/7574 cut-off events. [2024-06-21 16:44:35,014 INFO L125 PetriNetUnfolderBase]: For 1519924/1519924 co-relation queries the response was YES. [2024-06-21 16:44:35,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71337 conditions, 7574 events. 4944/7574 cut-off events. For 1519924/1519924 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 44039 event pairs, 1075 based on Foata normal form. 4/7578 useless extension candidates. Maximal degree in co-relation 71165. Up to 7298 conditions per place. [2024-06-21 16:44:35,142 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 423 selfloop transitions, 76 changer transitions 0/502 dead transitions. [2024-06-21 16:44:35,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 502 transitions, 8169 flow [2024-06-21 16:44:35,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:44:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:44:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 16:44:35,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-21 16:44:35,144 INFO L175 Difference]: Start difference. First operand has 351 places, 469 transitions, 6571 flow. Second operand 9 states and 148 transitions. [2024-06-21 16:44:35,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 502 transitions, 8169 flow [2024-06-21 16:44:40,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 502 transitions, 8086 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:40,709 INFO L231 Difference]: Finished difference. Result has 356 places, 475 transitions, 6734 flow [2024-06-21 16:44:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6734, PETRI_PLACES=356, PETRI_TRANSITIONS=475} [2024-06-21 16:44:40,710 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-21 16:44:40,710 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 475 transitions, 6734 flow [2024-06-21 16:44:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:40,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:40,710 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 16:44:40,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:44:40,710 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 16:44:40,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:40,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1499187377, now seen corresponding path program 3 times [2024-06-21 16:44:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793595314] [2024-06-21 16:44:40,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:40,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:41,333 INFO 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 16:44:41,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:41,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793595314] [2024-06-21 16:44:41,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793595314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:41,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:41,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:44:41,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936554106] [2024-06-21 16:44:41,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:41,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:44:41,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:44:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:44:41,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:41,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 475 transitions, 6734 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:41,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:41,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:41,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:43,378 INFO L124 PetriNetUnfolderBase]: 4964/7602 cut-off events. [2024-06-21 16:44:43,378 INFO L125 PetriNetUnfolderBase]: For 1547406/1547406 co-relation queries the response was YES. [2024-06-21 16:44:43,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71908 conditions, 7602 events. 4964/7602 cut-off events. For 1547406/1547406 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44226 event pairs, 1081 based on Foata normal form. 4/7606 useless extension candidates. Maximal degree in co-relation 71735. Up to 7314 conditions per place. [2024-06-21 16:44:43,489 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 429 selfloop transitions, 75 changer transitions 0/507 dead transitions. [2024-06-21 16:44:43,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 507 transitions, 8316 flow [2024-06-21 16:44:43,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:44:43,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:44:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 16:44:43,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-21 16:44:43,490 INFO L175 Difference]: Start difference. First operand has 356 places, 475 transitions, 6734 flow. Second operand 9 states and 151 transitions. [2024-06-21 16:44:43,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 507 transitions, 8316 flow [2024-06-21 16:44:49,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 507 transitions, 8155 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:49,049 INFO L231 Difference]: Finished difference. Result has 360 places, 478 transitions, 6779 flow [2024-06-21 16:44:49,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6779, PETRI_PLACES=360, PETRI_TRANSITIONS=478} [2024-06-21 16:44:49,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-21 16:44:49,050 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 478 transitions, 6779 flow [2024-06-21 16:44:49,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:49,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:49,050 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 16:44:49,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:44:49,050 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 16:44:49,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash -999327289, now seen corresponding path program 3 times [2024-06-21 16:44:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:49,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887547262] [2024-06-21 16:44:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:49,904 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 16:44:49,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:49,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887547262] [2024-06-21 16:44:49,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887547262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:49,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:49,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:44:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011750271] [2024-06-21 16:44:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:49,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:44:49,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:44:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:44:49,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:44:49,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 478 transitions, 6779 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:49,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:49,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:44:49,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:52,185 INFO L124 PetriNetUnfolderBase]: 4972/7614 cut-off events. [2024-06-21 16:44:52,185 INFO L125 PetriNetUnfolderBase]: For 1561983/1561983 co-relation queries the response was YES. [2024-06-21 16:44:52,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72099 conditions, 7614 events. 4972/7614 cut-off events. For 1561983/1561983 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44287 event pairs, 1088 based on Foata normal form. 2/7616 useless extension candidates. Maximal degree in co-relation 71925. Up to 7522 conditions per place. [2024-06-21 16:44:52,290 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 459 selfloop transitions, 36 changer transitions 0/498 dead transitions. [2024-06-21 16:44:52,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 498 transitions, 7846 flow [2024-06-21 16:44:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:52,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-21 16:44:52,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 16:44:52,291 INFO L175 Difference]: Start difference. First operand has 360 places, 478 transitions, 6779 flow. Second operand 8 states and 123 transitions. [2024-06-21 16:44:52,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 498 transitions, 7846 flow [2024-06-21 16:44:59,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 498 transitions, 7696 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:59,351 INFO L231 Difference]: Finished difference. Result has 362 places, 480 transitions, 6743 flow [2024-06-21 16:44:59,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6743, PETRI_PLACES=362, PETRI_TRANSITIONS=480} [2024-06-21 16:44:59,351 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-21 16:44:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 480 transitions, 6743 flow [2024-06-21 16:44:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:59,352 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 16:44:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:44:59,352 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 16:44:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash -998970417, now seen corresponding path program 4 times [2024-06-21 16:44:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116823838] [2024-06-21 16:44:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:59,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:59,959 INFO 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 16:44:59,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:59,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116823838] [2024-06-21 16:44:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116823838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:59,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:59,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:44:59,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810025398] [2024-06-21 16:44:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:59,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:44:59,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:44:59,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:00,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:00,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 480 transitions, 6743 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:00,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:00,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:00,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:01,896 INFO L124 PetriNetUnfolderBase]: 4960/7598 cut-off events. [2024-06-21 16:45:01,896 INFO L125 PetriNetUnfolderBase]: For 1575914/1575914 co-relation queries the response was YES. [2024-06-21 16:45:01,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71624 conditions, 7598 events. 4960/7598 cut-off events. For 1575914/1575914 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 44224 event pairs, 1077 based on Foata normal form. 4/7602 useless extension candidates. Maximal degree in co-relation 71449. Up to 7318 conditions per place. [2024-06-21 16:45:02,017 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 77 changer transitions 0/507 dead transitions. [2024-06-21 16:45:02,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 507 transitions, 8053 flow [2024-06-21 16:45:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:02,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:02,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 16:45:02,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-21 16:45:02,018 INFO L175 Difference]: Start difference. First operand has 362 places, 480 transitions, 6743 flow. Second operand 9 states and 149 transitions. [2024-06-21 16:45:02,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 507 transitions, 8053 flow [2024-06-21 16:45:07,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 507 transitions, 7942 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:07,585 INFO L231 Difference]: Finished difference. Result has 365 places, 480 transitions, 6792 flow [2024-06-21 16:45:07,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6632, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6792, PETRI_PLACES=365, PETRI_TRANSITIONS=480} [2024-06-21 16:45:07,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-21 16:45:07,585 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 480 transitions, 6792 flow [2024-06-21 16:45:07,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:07,585 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 16:45:07,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:45:07,586 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 16:45:07,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:07,586 INFO L85 PathProgramCache]: Analyzing trace with hash -908481119, now seen corresponding path program 7 times [2024-06-21 16:45:07,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:07,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088802248] [2024-06-21 16:45:07,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:07,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:08,142 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 16:45:08,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:08,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088802248] [2024-06-21 16:45:08,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088802248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:08,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:08,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:08,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439184346] [2024-06-21 16:45:08,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:08,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:08,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:08,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:08,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 480 transitions, 6792 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:08,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:08,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:08,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:09,828 INFO L124 PetriNetUnfolderBase]: 4990/7645 cut-off events. [2024-06-21 16:45:09,828 INFO L125 PetriNetUnfolderBase]: For 1617594/1617598 co-relation queries the response was YES. [2024-06-21 16:45:09,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72266 conditions, 7645 events. 4990/7645 cut-off events. For 1617594/1617598 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44449 event pairs, 1000 based on Foata normal form. 8/7653 useless extension candidates. Maximal degree in co-relation 72090. Up to 6593 conditions per place. [2024-06-21 16:45:09,946 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 351 selfloop transitions, 160 changer transitions 0/514 dead transitions. [2024-06-21 16:45:09,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 514 transitions, 8691 flow [2024-06-21 16:45:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 16:45:09,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-21 16:45:09,947 INFO L175 Difference]: Start difference. First operand has 365 places, 480 transitions, 6792 flow. Second operand 8 states and 144 transitions. [2024-06-21 16:45:09,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 514 transitions, 8691 flow [2024-06-21 16:45:15,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 514 transitions, 8509 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:45:15,282 INFO L231 Difference]: Finished difference. Result has 364 places, 487 transitions, 7074 flow [2024-06-21 16:45:15,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6610, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7074, PETRI_PLACES=364, PETRI_TRANSITIONS=487} [2024-06-21 16:45:15,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-21 16:45:15,283 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 487 transitions, 7074 flow [2024-06-21 16:45:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:15,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:15,283 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 16:45:15,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:45:15,283 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 16:45:15,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1487807397, now seen corresponding path program 4 times [2024-06-21 16:45:15,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:15,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232382420] [2024-06-21 16:45:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:15,839 INFO 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 16:45:15,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:15,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232382420] [2024-06-21 16:45:15,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232382420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:15,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:15,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:15,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886046354] [2024-06-21 16:45:15,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:15,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:15,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:15,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:15,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:15,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:15,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 487 transitions, 7074 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:15,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:15,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:15,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:17,633 INFO L124 PetriNetUnfolderBase]: 5000/7656 cut-off events. [2024-06-21 16:45:17,633 INFO L125 PetriNetUnfolderBase]: For 1620682/1620690 co-relation queries the response was YES. [2024-06-21 16:45:17,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73229 conditions, 7656 events. 5000/7656 cut-off events. For 1620682/1620690 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44617 event pairs, 1088 based on Foata normal form. 10/7666 useless extension candidates. Maximal degree in co-relation 73052. Up to 7385 conditions per place. [2024-06-21 16:45:17,731 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 449 selfloop transitions, 79 changer transitions 0/531 dead transitions. [2024-06-21 16:45:17,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 531 transitions, 8996 flow [2024-06-21 16:45:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-21 16:45:17,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-21 16:45:17,733 INFO L175 Difference]: Start difference. First operand has 364 places, 487 transitions, 7074 flow. Second operand 8 states and 130 transitions. [2024-06-21 16:45:17,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 531 transitions, 8996 flow [2024-06-21 16:45:23,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 531 transitions, 8692 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:23,703 INFO L231 Difference]: Finished difference. Result has 368 places, 507 transitions, 7264 flow [2024-06-21 16:45:23,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6770, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7264, PETRI_PLACES=368, PETRI_TRANSITIONS=507} [2024-06-21 16:45:23,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-21 16:45:23,704 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 507 transitions, 7264 flow [2024-06-21 16:45:23,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:23,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:23,704 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 16:45:23,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:45:23,704 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 16:45:23,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1487807025, now seen corresponding path program 8 times [2024-06-21 16:45:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:23,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034390937] [2024-06-21 16:45:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:24,258 INFO 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 16:45:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:24,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034390937] [2024-06-21 16:45:24,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034390937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:24,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:24,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:24,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867881143] [2024-06-21 16:45:24,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:24,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:24,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:24,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 507 transitions, 7264 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:24,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:24,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:24,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:26,252 INFO L124 PetriNetUnfolderBase]: 5058/7740 cut-off events. [2024-06-21 16:45:26,252 INFO L125 PetriNetUnfolderBase]: For 1698821/1698825 co-relation queries the response was YES. [2024-06-21 16:45:26,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74486 conditions, 7740 events. 5058/7740 cut-off events. For 1698821/1698825 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 44994 event pairs, 1019 based on Foata normal form. 8/7748 useless extension candidates. Maximal degree in co-relation 74307. Up to 6655 conditions per place. [2024-06-21 16:45:26,420 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 373 selfloop transitions, 166 changer transitions 0/542 dead transitions. [2024-06-21 16:45:26,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 542 transitions, 9300 flow [2024-06-21 16:45:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-21 16:45:26,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-21 16:45:26,424 INFO L175 Difference]: Start difference. First operand has 368 places, 507 transitions, 7264 flow. Second operand 8 states and 141 transitions. [2024-06-21 16:45:26,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 542 transitions, 9300 flow [2024-06-21 16:45:32,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 542 transitions, 9125 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-21 16:45:32,113 INFO L231 Difference]: Finished difference. Result has 374 places, 518 transitions, 7670 flow [2024-06-21 16:45:32,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7089, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7670, PETRI_PLACES=374, PETRI_TRANSITIONS=518} [2024-06-21 16:45:32,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-21 16:45:32,114 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 518 transitions, 7670 flow [2024-06-21 16:45:32,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:32,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:32,114 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 16:45:32,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:45:32,114 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 16:45:32,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1897593353, now seen corresponding path program 9 times [2024-06-21 16:45:32,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:32,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415248031] [2024-06-21 16:45:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:32,674 INFO 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 16:45:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:32,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415248031] [2024-06-21 16:45:32,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415248031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:32,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:32,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:32,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608026346] [2024-06-21 16:45:32,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:32,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:32,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:32,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 518 transitions, 7670 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:32,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:32,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:32,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:34,559 INFO L124 PetriNetUnfolderBase]: 5060/7744 cut-off events. [2024-06-21 16:45:34,559 INFO L125 PetriNetUnfolderBase]: For 1701267/1701271 co-relation queries the response was YES. [2024-06-21 16:45:34,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74734 conditions, 7744 events. 5060/7744 cut-off events. For 1701267/1701271 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45031 event pairs, 1003 based on Foata normal form. 8/7752 useless extension candidates. Maximal degree in co-relation 74552. Up to 6658 conditions per place. [2024-06-21 16:45:34,676 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 352 selfloop transitions, 187 changer transitions 0/542 dead transitions. [2024-06-21 16:45:34,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 542 transitions, 9574 flow [2024-06-21 16:45:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:34,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 16:45:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-21 16:45:34,677 INFO L175 Difference]: Start difference. First operand has 374 places, 518 transitions, 7670 flow. Second operand 8 states and 138 transitions. [2024-06-21 16:45:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 542 transitions, 9574 flow [2024-06-21 16:45:40,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 542 transitions, 9295 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:40,714 INFO L231 Difference]: Finished difference. Result has 378 places, 521 transitions, 7852 flow [2024-06-21 16:45:40,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7393, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7852, PETRI_PLACES=378, PETRI_TRANSITIONS=521} [2024-06-21 16:45:40,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-21 16:45:40,714 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 521 transitions, 7852 flow [2024-06-21 16:45:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:40,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:40,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:40,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:45:40,715 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 16:45:40,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:40,715 INFO L85 PathProgramCache]: Analyzing trace with hash -553919177, now seen corresponding path program 5 times [2024-06-21 16:45:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385836774] [2024-06-21 16:45:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:41,286 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 16:45:41,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:41,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385836774] [2024-06-21 16:45:41,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385836774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:41,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:41,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:41,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774479544] [2024-06-21 16:45:41,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:41,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:41,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:41,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:41,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 521 transitions, 7852 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:41,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:41,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:41,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:43,306 INFO L124 PetriNetUnfolderBase]: 5086/7777 cut-off events. [2024-06-21 16:45:43,306 INFO L125 PetriNetUnfolderBase]: For 1717427/1717435 co-relation queries the response was YES. [2024-06-21 16:45:43,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75625 conditions, 7777 events. 5086/7777 cut-off events. For 1717427/1717435 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45310 event pairs, 1086 based on Foata normal form. 10/7787 useless extension candidates. Maximal degree in co-relation 75442. Up to 7495 conditions per place. [2024-06-21 16:45:43,412 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 459 selfloop transitions, 88 changer transitions 0/550 dead transitions. [2024-06-21 16:45:43,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 550 transitions, 9711 flow [2024-06-21 16:45:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:45:43,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:45:43,413 INFO L175 Difference]: Start difference. First operand has 378 places, 521 transitions, 7852 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:45:43,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 550 transitions, 9711 flow [2024-06-21 16:45:49,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 550 transitions, 9191 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:49,902 INFO L231 Difference]: Finished difference. Result has 380 places, 531 transitions, 7756 flow [2024-06-21 16:45:49,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7756, PETRI_PLACES=380, PETRI_TRANSITIONS=531} [2024-06-21 16:45:49,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-21 16:45:49,903 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 531 transitions, 7756 flow [2024-06-21 16:45:49,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:49,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:49,903 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 16:45:49,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:45:49,903 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 16:45:49,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash -553503467, now seen corresponding path program 6 times [2024-06-21 16:45:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:49,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365776603] [2024-06-21 16:45:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:49,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:50,496 INFO 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 16:45:50,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:50,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365776603] [2024-06-21 16:45:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365776603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:50,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:50,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764095096] [2024-06-21 16:45:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:50,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:50,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:50,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:50,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:50,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:50,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 531 transitions, 7756 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:50,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:50,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:50,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:52,497 INFO L124 PetriNetUnfolderBase]: 5080/7769 cut-off events. [2024-06-21 16:45:52,497 INFO L125 PetriNetUnfolderBase]: For 1730894/1730902 co-relation queries the response was YES. [2024-06-21 16:45:52,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74991 conditions, 7769 events. 5080/7769 cut-off events. For 1730894/1730902 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45236 event pairs, 1088 based on Foata normal form. 10/7779 useless extension candidates. Maximal degree in co-relation 74807. Up to 7490 conditions per place. [2024-06-21 16:45:52,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 456 selfloop transitions, 90 changer transitions 0/549 dead transitions. [2024-06-21 16:45:52,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 549 transitions, 9186 flow [2024-06-21 16:45:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 16:45:52,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-21 16:45:52,708 INFO L175 Difference]: Start difference. First operand has 380 places, 531 transitions, 7756 flow. Second operand 8 states and 126 transitions. [2024-06-21 16:45:52,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 549 transitions, 9186 flow [2024-06-21 16:45:58,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 549 transitions, 8963 flow, removed 71 selfloop flow, removed 3 redundant places. [2024-06-21 16:45:58,636 INFO L231 Difference]: Finished difference. Result has 385 places, 531 transitions, 7720 flow [2024-06-21 16:45:58,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7533, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7720, PETRI_PLACES=385, PETRI_TRANSITIONS=531} [2024-06-21 16:45:58,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-21 16:45:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 531 transitions, 7720 flow [2024-06-21 16:45:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:58,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:58,637 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 16:45:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:45:58,637 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 16:45:58,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:58,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1760755763, now seen corresponding path program 7 times [2024-06-21 16:45:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108207597] [2024-06-21 16:45:58,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:58,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:59,188 INFO 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 16:45:59,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108207597] [2024-06-21 16:45:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108207597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:59,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:59,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666739267] [2024-06-21 16:45:59,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:59,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:59,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:59,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:45:59,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 531 transitions, 7720 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:59,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:59,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:45:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:01,137 INFO L124 PetriNetUnfolderBase]: 5101/7798 cut-off events. [2024-06-21 16:46:01,137 INFO L125 PetriNetUnfolderBase]: For 1767542/1767550 co-relation queries the response was YES. [2024-06-21 16:46:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75767 conditions, 7798 events. 5101/7798 cut-off events. For 1767542/1767550 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 45413 event pairs, 1083 based on Foata normal form. 9/7807 useless extension candidates. Maximal degree in co-relation 75582. Up to 7703 conditions per place. [2024-06-21 16:46:01,249 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 500 selfloop transitions, 58 changer transitions 0/561 dead transitions. [2024-06-21 16:46:01,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 561 transitions, 9710 flow [2024-06-21 16:46:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 16:46:01,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-21 16:46:01,250 INFO L175 Difference]: Start difference. First operand has 385 places, 531 transitions, 7720 flow. Second operand 8 states and 118 transitions. [2024-06-21 16:46:01,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 561 transitions, 9710 flow [2024-06-21 16:46:07,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 561 transitions, 9507 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:07,918 INFO L231 Difference]: Finished difference. Result has 389 places, 548 transitions, 8066 flow [2024-06-21 16:46:07,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8066, PETRI_PLACES=389, PETRI_TRANSITIONS=548} [2024-06-21 16:46:07,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-21 16:46:07,918 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 548 transitions, 8066 flow [2024-06-21 16:46:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:07,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:07,918 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 16:46:07,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:46:07,918 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 16:46:07,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:07,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1188530693, now seen corresponding path program 10 times [2024-06-21 16:46:07,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:07,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013845675] [2024-06-21 16:46:07,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:07,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:08,467 INFO 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 16:46:08,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:08,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013845675] [2024-06-21 16:46:08,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013845675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:08,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:08,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:08,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254851334] [2024-06-21 16:46:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:08,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:08,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:08,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 548 transitions, 8066 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:08,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:08,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:08,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:10,443 INFO L124 PetriNetUnfolderBase]: 5064/7740 cut-off events. [2024-06-21 16:46:10,443 INFO L125 PetriNetUnfolderBase]: For 1790585/1790589 co-relation queries the response was YES. [2024-06-21 16:46:10,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75417 conditions, 7740 events. 5064/7740 cut-off events. For 1790585/1790589 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 45023 event pairs, 1083 based on Foata normal form. 4/7744 useless extension candidates. Maximal degree in co-relation 75229. Up to 7585 conditions per place. [2024-06-21 16:46:10,556 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 493 selfloop transitions, 66 changer transitions 0/562 dead transitions. [2024-06-21 16:46:10,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 562 transitions, 9460 flow [2024-06-21 16:46:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:10,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-21 16:46:10,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-21 16:46:10,557 INFO L175 Difference]: Start difference. First operand has 389 places, 548 transitions, 8066 flow. Second operand 8 states and 121 transitions. [2024-06-21 16:46:10,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 562 transitions, 9460 flow [2024-06-21 16:46:16,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 562 transitions, 9308 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-21 16:46:16,959 INFO L231 Difference]: Finished difference. Result has 394 places, 548 transitions, 8052 flow [2024-06-21 16:46:16,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8052, PETRI_PLACES=394, PETRI_TRANSITIONS=548} [2024-06-21 16:46:16,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-21 16:46:16,959 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 548 transitions, 8052 flow [2024-06-21 16:46:16,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:16,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:16,959 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 16:46:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:46:16,959 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 16:46:16,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 322292605, now seen corresponding path program 8 times [2024-06-21 16:46:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:16,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554191078] [2024-06-21 16:46:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:17,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:17,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554191078] [2024-06-21 16:46:17,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554191078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:17,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:17,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:17,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057772680] [2024-06-21 16:46:17,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:17,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:17,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:17,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 548 transitions, 8052 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:17,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:17,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:17,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:19,523 INFO L124 PetriNetUnfolderBase]: 5061/7733 cut-off events. [2024-06-21 16:46:19,523 INFO L125 PetriNetUnfolderBase]: For 1802525/1802533 co-relation queries the response was YES. [2024-06-21 16:46:19,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75481 conditions, 7733 events. 5061/7733 cut-off events. For 1802525/1802533 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44980 event pairs, 1071 based on Foata normal form. 9/7742 useless extension candidates. Maximal degree in co-relation 75291. Up to 7639 conditions per place. [2024-06-21 16:46:19,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 59 changer transitions 0/563 dead transitions. [2024-06-21 16:46:19,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 563 transitions, 9764 flow [2024-06-21 16:46:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 16:46:19,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-21 16:46:19,630 INFO L175 Difference]: Start difference. First operand has 394 places, 548 transitions, 8052 flow. Second operand 8 states and 118 transitions. [2024-06-21 16:46:19,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 563 transitions, 9764 flow [2024-06-21 16:46:26,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 563 transitions, 9223 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-06-21 16:46:26,120 INFO L231 Difference]: Finished difference. Result has 391 places, 550 transitions, 7713 flow [2024-06-21 16:46:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7713, PETRI_PLACES=391, PETRI_TRANSITIONS=550} [2024-06-21 16:46:26,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-21 16:46:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 550 transitions, 7713 flow [2024-06-21 16:46:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:26,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:26,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:46:26,121 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 16:46:26,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:26,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1011399545, now seen corresponding path program 9 times [2024-06-21 16:46:26,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:26,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442599891] [2024-06-21 16:46:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:26,654 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 16:46:26,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:26,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442599891] [2024-06-21 16:46:26,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442599891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:26,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:26,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:26,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922002411] [2024-06-21 16:46:26,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:26,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:26,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:26,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 550 transitions, 7713 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:26,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:26,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:26,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:28,746 INFO L124 PetriNetUnfolderBase]: 5058/7729 cut-off events. [2024-06-21 16:46:28,746 INFO L125 PetriNetUnfolderBase]: For 1816939/1816947 co-relation queries the response was YES. [2024-06-21 16:46:28,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75080 conditions, 7729 events. 5058/7729 cut-off events. For 1816939/1816947 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44940 event pairs, 1069 based on Foata normal form. 9/7738 useless extension candidates. Maximal degree in co-relation 74890. Up to 7667 conditions per place. [2024-06-21 16:46:28,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 525 selfloop transitions, 34 changer transitions 0/562 dead transitions. [2024-06-21 16:46:28,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 562 transitions, 9103 flow [2024-06-21 16:46:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-21 16:46:28,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35365853658536583 [2024-06-21 16:46:28,858 INFO L175 Difference]: Start difference. First operand has 391 places, 550 transitions, 7713 flow. Second operand 8 states and 116 transitions. [2024-06-21 16:46:28,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 562 transitions, 9103 flow [2024-06-21 16:46:35,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 562 transitions, 8944 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:35,541 INFO L231 Difference]: Finished difference. Result has 395 places, 550 transitions, 7628 flow [2024-06-21 16:46:35,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7628, PETRI_PLACES=395, PETRI_TRANSITIONS=550} [2024-06-21 16:46:35,541 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-21 16:46:35,541 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 550 transitions, 7628 flow [2024-06-21 16:46:35,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:35,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:35,541 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 16:46:35,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:46:35,541 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 16:46:35,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:35,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1011279203, now seen corresponding path program 11 times [2024-06-21 16:46:35,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:35,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041552547] [2024-06-21 16:46:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:35,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:36,026 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 16:46:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:36,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041552547] [2024-06-21 16:46:36,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041552547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:36,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:36,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47019603] [2024-06-21 16:46:36,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:36,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:36,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:36,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:36,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 550 transitions, 7628 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:36,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:36,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:36,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:38,138 INFO L124 PetriNetUnfolderBase]: 5048/7718 cut-off events. [2024-06-21 16:46:38,138 INFO L125 PetriNetUnfolderBase]: For 1837601/1837605 co-relation queries the response was YES. [2024-06-21 16:46:38,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74798 conditions, 7718 events. 5048/7718 cut-off events. For 1837601/1837605 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44867 event pairs, 1081 based on Foata normal form. 4/7722 useless extension candidates. Maximal degree in co-relation 74607. Up to 7621 conditions per place. [2024-06-21 16:46:38,254 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 521 selfloop transitions, 38 changer transitions 0/562 dead transitions. [2024-06-21 16:46:38,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 562 transitions, 8776 flow [2024-06-21 16:46:38,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-21 16:46:38,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-21 16:46:38,255 INFO L175 Difference]: Start difference. First operand has 395 places, 550 transitions, 7628 flow. Second operand 8 states and 118 transitions. [2024-06-21 16:46:38,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 562 transitions, 8776 flow [2024-06-21 16:46:44,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 562 transitions, 8695 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:46:44,856 INFO L231 Difference]: Finished difference. Result has 398 places, 550 transitions, 7629 flow [2024-06-21 16:46:44,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7547, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7629, PETRI_PLACES=398, PETRI_TRANSITIONS=550} [2024-06-21 16:46:44,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 16:46:44,856 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 550 transitions, 7629 flow [2024-06-21 16:46:44,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:44,856 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 16:46:44,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:46:44,857 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 16:46:44,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 145160713, now seen corresponding path program 12 times [2024-06-21 16:46:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122212743] [2024-06-21 16:46:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:45,367 INFO 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 16:46:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122212743] [2024-06-21 16:46:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122212743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:45,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:45,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:45,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99433927] [2024-06-21 16:46:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:45,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:45,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:45,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 550 transitions, 7629 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:45,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:45,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:45,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:47,414 INFO L124 PetriNetUnfolderBase]: 5023/7678 cut-off events. [2024-06-21 16:46:47,415 INFO L125 PetriNetUnfolderBase]: For 1850789/1850793 co-relation queries the response was YES. [2024-06-21 16:46:47,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74505 conditions, 7678 events. 5023/7678 cut-off events. For 1850789/1850793 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44612 event pairs, 1078 based on Foata normal form. 4/7682 useless extension candidates. Maximal degree in co-relation 74313. Up to 7568 conditions per place. [2024-06-21 16:46:47,521 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 45 changer transitions 0/564 dead transitions. [2024-06-21 16:46:47,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 564 transitions, 9035 flow [2024-06-21 16:46:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-21 16:46:47,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-21 16:46:47,522 INFO L175 Difference]: Start difference. First operand has 398 places, 550 transitions, 7629 flow. Second operand 8 states and 122 transitions. [2024-06-21 16:46:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 564 transitions, 9035 flow [2024-06-21 16:46:54,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 564 transitions, 8876 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 16:46:54,131 INFO L231 Difference]: Finished difference. Result has 397 places, 550 transitions, 7566 flow [2024-06-21 16:46:54,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7566, PETRI_PLACES=397, PETRI_TRANSITIONS=550} [2024-06-21 16:46:54,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 16:46:54,131 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 550 transitions, 7566 flow [2024-06-21 16:46:54,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:54,132 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 16:46:54,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:46:54,132 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 16:46:54,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1704263231, now seen corresponding path program 10 times [2024-06-21 16:46:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392739997] [2024-06-21 16:46:54,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:54,636 INFO 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 16:46:54,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392739997] [2024-06-21 16:46:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392739997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:54,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:54,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80595582] [2024-06-21 16:46:54,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:54,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:54,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:54,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:46:54,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 550 transitions, 7566 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:54,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:46:54,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:56,682 INFO L124 PetriNetUnfolderBase]: 5028/7682 cut-off events. [2024-06-21 16:46:56,682 INFO L125 PetriNetUnfolderBase]: For 1870709/1870717 co-relation queries the response was YES. [2024-06-21 16:46:56,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74736 conditions, 7682 events. 5028/7682 cut-off events. For 1870709/1870717 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44685 event pairs, 1064 based on Foata normal form. 9/7691 useless extension candidates. Maximal degree in co-relation 74545. Up to 7629 conditions per place. [2024-06-21 16:46:56,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 531 selfloop transitions, 30 changer transitions 0/564 dead transitions. [2024-06-21 16:46:56,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 564 transitions, 8803 flow [2024-06-21 16:46:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:56,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2024-06-21 16:46:56,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3445121951219512 [2024-06-21 16:46:56,796 INFO L175 Difference]: Start difference. First operand has 397 places, 550 transitions, 7566 flow. Second operand 8 states and 113 transitions. [2024-06-21 16:46:56,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 564 transitions, 8803 flow [2024-06-21 16:47:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 564 transitions, 8527 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:02,514 INFO L231 Difference]: Finished difference. Result has 395 places, 553 transitions, 7451 flow [2024-06-21 16:47:02,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7290, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7451, PETRI_PLACES=395, PETRI_TRANSITIONS=553} [2024-06-21 16:47:02,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-21 16:47:02,516 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 553 transitions, 7451 flow [2024-06-21 16:47:02,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:02,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:02,516 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 16:47:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:47:02,516 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 16:47:02,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:02,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1416847925, now seen corresponding path program 11 times [2024-06-21 16:47:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424867344] [2024-06-21 16:47:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:02,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:03,065 INFO 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 16:47:03,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:03,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424867344] [2024-06-21 16:47:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424867344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:03,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:03,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:03,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102763633] [2024-06-21 16:47:03,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:03,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:03,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:03,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 553 transitions, 7451 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:03,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:05,022 INFO L124 PetriNetUnfolderBase]: 5025/7678 cut-off events. [2024-06-21 16:47:05,022 INFO L125 PetriNetUnfolderBase]: For 1889591/1889599 co-relation queries the response was YES. [2024-06-21 16:47:05,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74582 conditions, 7678 events. 5025/7678 cut-off events. For 1889591/1889599 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44606 event pairs, 1062 based on Foata normal form. 9/7687 useless extension candidates. Maximal degree in co-relation 74391. Up to 7612 conditions per place. [2024-06-21 16:47:05,134 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 41 changer transitions 0/565 dead transitions. [2024-06-21 16:47:05,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 565 transitions, 8855 flow [2024-06-21 16:47:05,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:05,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-21 16:47:05,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-21 16:47:05,135 INFO L175 Difference]: Start difference. First operand has 395 places, 553 transitions, 7451 flow. Second operand 8 states and 115 transitions. [2024-06-21 16:47:05,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 565 transitions, 8855 flow [2024-06-21 16:47:12,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 565 transitions, 8703 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:13,002 INFO L231 Difference]: Finished difference. Result has 397 places, 553 transitions, 7387 flow [2024-06-21 16:47:13,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7299, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7387, PETRI_PLACES=397, PETRI_TRANSITIONS=553} [2024-06-21 16:47:13,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-21 16:47:13,003 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 553 transitions, 7387 flow [2024-06-21 16:47:13,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:13,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:13,003 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 16:47:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:47:13,003 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 16:47:13,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:13,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1011636695, now seen corresponding path program 12 times [2024-06-21 16:47:13,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:13,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595495169] [2024-06-21 16:47:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:13,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:13,490 INFO 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 16:47:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:13,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595495169] [2024-06-21 16:47:13,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595495169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:13,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:13,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:13,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995553301] [2024-06-21 16:47:13,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:13,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:13,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:13,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:13,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 553 transitions, 7387 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:13,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:13,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:13,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:15,483 INFO L124 PetriNetUnfolderBase]: 5022/7674 cut-off events. [2024-06-21 16:47:15,484 INFO L125 PetriNetUnfolderBase]: For 1909912/1909920 co-relation queries the response was YES. [2024-06-21 16:47:15,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74571 conditions, 7674 events. 5022/7674 cut-off events. For 1909912/1909920 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 44622 event pairs, 1062 based on Foata normal form. 9/7683 useless extension candidates. Maximal degree in co-relation 74379. Up to 7621 conditions per place. [2024-06-21 16:47:15,592 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 532 selfloop transitions, 29 changer transitions 0/564 dead transitions. [2024-06-21 16:47:15,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 564 transitions, 8535 flow [2024-06-21 16:47:15,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-21 16:47:15,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3475609756097561 [2024-06-21 16:47:15,593 INFO L175 Difference]: Start difference. First operand has 397 places, 553 transitions, 7387 flow. Second operand 8 states and 114 transitions. [2024-06-21 16:47:15,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 564 transitions, 8535 flow [2024-06-21 16:47:22,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 564 transitions, 8363 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:22,969 INFO L231 Difference]: Finished difference. Result has 398 places, 553 transitions, 7279 flow [2024-06-21 16:47:22,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7215, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7279, PETRI_PLACES=398, PETRI_TRANSITIONS=553} [2024-06-21 16:47:22,969 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-21 16:47:22,969 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 553 transitions, 7279 flow [2024-06-21 16:47:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:22,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:22,969 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 16:47:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:47:22,969 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:22,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1411130409, now seen corresponding path program 5 times [2024-06-21 16:47:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:22,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051058411] [2024-06-21 16:47:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:23,579 INFO 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 16:47:23,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:23,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051058411] [2024-06-21 16:47:23,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051058411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:23,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:23,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750624354] [2024-06-21 16:47:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:23,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:23,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:23,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:23,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:23,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 553 transitions, 7279 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:23,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:23,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:23,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:25,870 INFO L124 PetriNetUnfolderBase]: 5074/7749 cut-off events. [2024-06-21 16:47:25,870 INFO L125 PetriNetUnfolderBase]: For 1997629/1997633 co-relation queries the response was YES. [2024-06-21 16:47:25,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75668 conditions, 7749 events. 5074/7749 cut-off events. For 1997629/1997633 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 45021 event pairs, 1074 based on Foata normal form. 6/7755 useless extension candidates. Maximal degree in co-relation 75475. Up to 7432 conditions per place. [2024-06-21 16:47:25,992 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 87 changer transitions 0/580 dead transitions. [2024-06-21 16:47:25,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 580 transitions, 9099 flow [2024-06-21 16:47:25,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 16:47:25,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 16:47:25,993 INFO L175 Difference]: Start difference. First operand has 398 places, 553 transitions, 7279 flow. Second operand 9 states and 141 transitions. [2024-06-21 16:47:25,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 580 transitions, 9099 flow [2024-06-21 16:47:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 580 transitions, 9027 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:33,307 INFO L231 Difference]: Finished difference. Result has 400 places, 559 transitions, 7481 flow [2024-06-21 16:47:33,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7207, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7481, PETRI_PLACES=400, PETRI_TRANSITIONS=559} [2024-06-21 16:47:33,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-21 16:47:33,308 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 559 transitions, 7481 flow [2024-06-21 16:47:33,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:33,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:33,308 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 16:47:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:47:33,308 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 16:47:33,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:33,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1411142499, now seen corresponding path program 6 times [2024-06-21 16:47:33,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:33,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480371684] [2024-06-21 16:47:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:34,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:34,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480371684] [2024-06-21 16:47:34,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480371684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:34,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:34,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:34,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661355394] [2024-06-21 16:47:34,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:34,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:34,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:34,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:34,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:34,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:34,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 559 transitions, 7481 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:34,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:34,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:34,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:36,244 INFO L124 PetriNetUnfolderBase]: 5094/7777 cut-off events. [2024-06-21 16:47:36,244 INFO L125 PetriNetUnfolderBase]: For 2029596/2029600 co-relation queries the response was YES. [2024-06-21 16:47:36,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76336 conditions, 7777 events. 5094/7777 cut-off events. For 2029596/2029600 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 45179 event pairs, 1084 based on Foata normal form. 6/7783 useless extension candidates. Maximal degree in co-relation 76142. Up to 7448 conditions per place. [2024-06-21 16:47:36,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 492 selfloop transitions, 89 changer transitions 0/584 dead transitions. [2024-06-21 16:47:36,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 584 transitions, 9276 flow [2024-06-21 16:47:36,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 16:47:36,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 16:47:36,504 INFO L175 Difference]: Start difference. First operand has 400 places, 559 transitions, 7481 flow. Second operand 9 states and 143 transitions. [2024-06-21 16:47:36,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 584 transitions, 9276 flow [2024-06-21 16:47:43,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 584 transitions, 9103 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:43,865 INFO L231 Difference]: Finished difference. Result has 404 places, 562 transitions, 7545 flow [2024-06-21 16:47:43,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7319, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7545, PETRI_PLACES=404, PETRI_TRANSITIONS=562} [2024-06-21 16:47:43,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-21 16:47:43,865 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 562 transitions, 7545 flow [2024-06-21 16:47:43,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:43,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:43,866 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 16:47:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:47:43,866 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 16:47:43,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:43,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1593246961, now seen corresponding path program 7 times [2024-06-21 16:47:43,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:43,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931651125] [2024-06-21 16:47:43,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:43,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:44,495 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 16:47:44,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:44,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931651125] [2024-06-21 16:47:44,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931651125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:44,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:44,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:44,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317608268] [2024-06-21 16:47:44,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:44,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:44,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:44,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:44,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 562 transitions, 7545 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:44,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:44,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:44,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:46,671 INFO L124 PetriNetUnfolderBase]: 5082/7756 cut-off events. [2024-06-21 16:47:46,671 INFO L125 PetriNetUnfolderBase]: For 2025141/2025141 co-relation queries the response was YES. [2024-06-21 16:47:46,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75825 conditions, 7756 events. 5082/7756 cut-off events. For 2025141/2025141 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 45081 event pairs, 1063 based on Foata normal form. 4/7760 useless extension candidates. Maximal degree in co-relation 75630. Up to 7708 conditions per place. [2024-06-21 16:47:46,789 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 22 changer transitions 0/577 dead transitions. [2024-06-21 16:47:46,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 577 transitions, 8733 flow [2024-06-21 16:47:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2024-06-21 16:47:46,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33875338753387535 [2024-06-21 16:47:46,790 INFO L175 Difference]: Start difference. First operand has 404 places, 562 transitions, 7545 flow. Second operand 9 states and 125 transitions. [2024-06-21 16:47:46,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 577 transitions, 8733 flow [2024-06-21 16:47:55,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 577 transitions, 8528 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:55,359 INFO L231 Difference]: Finished difference. Result has 407 places, 562 transitions, 7390 flow [2024-06-21 16:47:55,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7390, PETRI_PLACES=407, PETRI_TRANSITIONS=562} [2024-06-21 16:47:55,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 16:47:55,360 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 562 transitions, 7390 flow [2024-06-21 16:47:55,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:55,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:55,360 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 16:47:55,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:47:55,360 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 16:47:55,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1011645189, now seen corresponding path program 8 times [2024-06-21 16:47:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:55,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028923702] [2024-06-21 16:47:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:55,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:55,961 INFO 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 16:47:55,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:55,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028923702] [2024-06-21 16:47:55,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028923702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:55,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:55,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:47:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178234638] [2024-06-21 16:47:55,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:55,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:47:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:55,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:47:55,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:47:56,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:47:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 562 transitions, 7390 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:47:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:58,194 INFO L124 PetriNetUnfolderBase]: 5102/7789 cut-off events. [2024-06-21 16:47:58,194 INFO L125 PetriNetUnfolderBase]: For 2054933/2054937 co-relation queries the response was YES. [2024-06-21 16:47:58,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75863 conditions, 7789 events. 5102/7789 cut-off events. For 2054933/2054937 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45260 event pairs, 1074 based on Foata normal form. 6/7795 useless extension candidates. Maximal degree in co-relation 75667. Up to 7456 conditions per place. [2024-06-21 16:47:58,462 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 496 selfloop transitions, 88 changer transitions 0/587 dead transitions. [2024-06-21 16:47:58,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 587 transitions, 8928 flow [2024-06-21 16:47:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:47:58,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:47:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-21 16:47:58,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-21 16:47:58,463 INFO L175 Difference]: Start difference. First operand has 407 places, 562 transitions, 7390 flow. Second operand 9 states and 143 transitions. [2024-06-21 16:47:58,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 587 transitions, 8928 flow [2024-06-21 16:48:06,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 587 transitions, 8859 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:06,351 INFO L231 Difference]: Finished difference. Result has 407 places, 565 transitions, 7545 flow [2024-06-21 16:48:06,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7321, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7545, PETRI_PLACES=407, PETRI_TRANSITIONS=565} [2024-06-21 16:48:06,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 16:48:06,352 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 565 transitions, 7545 flow [2024-06-21 16:48:06,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:06,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:06,352 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 16:48:06,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:48:06,352 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 16:48:06,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:06,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1011276227, now seen corresponding path program 4 times [2024-06-21 16:48:06,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:06,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337577080] [2024-06-21 16:48:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:06,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:07,202 INFO 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 16:48:07,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:07,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337577080] [2024-06-21 16:48:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337577080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:07,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115279149] [2024-06-21 16:48:07,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:07,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:07,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:07,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:07,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:48:07,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 565 transitions, 7545 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:07,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:07,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:48:07,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:09,542 INFO L124 PetriNetUnfolderBase]: 5097/7782 cut-off events. [2024-06-21 16:48:09,542 INFO L125 PetriNetUnfolderBase]: For 2051514/2051518 co-relation queries the response was YES. [2024-06-21 16:48:09,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76026 conditions, 7782 events. 5097/7782 cut-off events. For 2051514/2051518 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 45248 event pairs, 1093 based on Foata normal form. 4/7786 useless extension candidates. Maximal degree in co-relation 75829. Up to 7685 conditions per place. [2024-06-21 16:48:09,659 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 36 changer transitions 0/577 dead transitions. [2024-06-21 16:48:09,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 577 transitions, 8721 flow [2024-06-21 16:48:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-21 16:48:09,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-21 16:48:09,660 INFO L175 Difference]: Start difference. First operand has 407 places, 565 transitions, 7545 flow. Second operand 8 states and 117 transitions. [2024-06-21 16:48:09,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 577 transitions, 8721 flow [2024-06-21 16:48:17,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 577 transitions, 8419 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-21 16:48:17,887 INFO L231 Difference]: Finished difference. Result has 407 places, 565 transitions, 7320 flow [2024-06-21 16:48:17,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7243, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7320, PETRI_PLACES=407, PETRI_TRANSITIONS=565} [2024-06-21 16:48:17,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-21 16:48:17,888 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 565 transitions, 7320 flow [2024-06-21 16:48:17,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:17,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:17,888 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 16:48:17,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:48:17,888 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 16:48:17,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1011287139, now seen corresponding path program 9 times [2024-06-21 16:48:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:17,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052499595] [2024-06-21 16:48:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:18,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:18,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052499595] [2024-06-21 16:48:18,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052499595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:18,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:18,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:18,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840832065] [2024-06-21 16:48:18,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:18,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:18,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:18,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:48:18,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 565 transitions, 7320 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:18,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:18,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:48:18,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:20,827 INFO L124 PetriNetUnfolderBase]: 5117/7810 cut-off events. [2024-06-21 16:48:20,827 INFO L125 PetriNetUnfolderBase]: For 2097423/2097427 co-relation queries the response was YES. [2024-06-21 16:48:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76038 conditions, 7810 events. 5117/7810 cut-off events. For 2097423/2097427 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45400 event pairs, 1079 based on Foata normal form. 6/7816 useless extension candidates. Maximal degree in co-relation 75840. Up to 7465 conditions per place. [2024-06-21 16:48:20,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 93 changer transitions 0/589 dead transitions. [2024-06-21 16:48:20,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 589 transitions, 8855 flow [2024-06-21 16:48:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 16:48:20,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 16:48:20,953 INFO L175 Difference]: Start difference. First operand has 407 places, 565 transitions, 7320 flow. Second operand 9 states and 141 transitions. [2024-06-21 16:48:20,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 589 transitions, 8855 flow [2024-06-21 16:48:28,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 589 transitions, 8764 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:28,731 INFO L231 Difference]: Finished difference. Result has 409 places, 568 transitions, 7456 flow [2024-06-21 16:48:28,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7229, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7456, PETRI_PLACES=409, PETRI_TRANSITIONS=568} [2024-06-21 16:48:28,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-21 16:48:28,732 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 568 transitions, 7456 flow [2024-06-21 16:48:28,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:28,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:28,732 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 16:48:28,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:48:28,732 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 16:48:28,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:28,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1715885317, now seen corresponding path program 10 times [2024-06-21 16:48:28,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:28,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265912576] [2024-06-21 16:48:28,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:28,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:28,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:29,333 INFO 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 16:48:29,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:29,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265912576] [2024-06-21 16:48:29,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265912576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:29,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:29,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:48:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249575449] [2024-06-21 16:48:29,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:29,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:48:29,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:29,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:48:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:48:29,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:48:29,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 568 transitions, 7456 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:29,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:29,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:48:29,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:31,636 INFO L124 PetriNetUnfolderBase]: 5105/7794 cut-off events. [2024-06-21 16:48:31,636 INFO L125 PetriNetUnfolderBase]: For 2092738/2092742 co-relation queries the response was YES. [2024-06-21 16:48:31,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75878 conditions, 7794 events. 5105/7794 cut-off events. For 2092738/2092742 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 45292 event pairs, 1077 based on Foata normal form. 6/7800 useless extension candidates. Maximal degree in co-relation 75679. Up to 7457 conditions per place. [2024-06-21 16:48:31,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 497 selfloop transitions, 90 changer transitions 0/590 dead transitions. [2024-06-21 16:48:31,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 590 transitions, 8698 flow [2024-06-21 16:48:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 16:48:31,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:48:31,754 INFO L175 Difference]: Start difference. First operand has 409 places, 568 transitions, 7456 flow. Second operand 9 states and 144 transitions. [2024-06-21 16:48:31,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 590 transitions, 8698 flow [2024-06-21 16:48:38,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 590 transitions, 8448 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-21 16:48:38,092 INFO L231 Difference]: Finished difference. Result has 411 places, 568 transitions, 7392 flow [2024-06-21 16:48:38,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7392, PETRI_PLACES=411, PETRI_TRANSITIONS=568} [2024-06-21 16:48:38,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-21 16:48:38,093 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 568 transitions, 7392 flow [2024-06-21 16:48:38,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:38,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:38,093 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 16:48:38,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:48:38,093 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 16:48:38,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1779691487, now seen corresponding path program 1 times [2024-06-21 16:48:38,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:38,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074448758] [2024-06-21 16:48:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:38,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074448758] [2024-06-21 16:48:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074448758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:38,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:38,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:38,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440977238] [2024-06-21 16:48:38,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:38,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:38,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:38,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:38,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:38,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:48:38,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 568 transitions, 7392 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:48:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:40,803 INFO L124 PetriNetUnfolderBase]: 4942/7615 cut-off events. [2024-06-21 16:48:40,803 INFO L125 PetriNetUnfolderBase]: For 1846202/1846218 co-relation queries the response was YES. [2024-06-21 16:48:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71433 conditions, 7615 events. 4942/7615 cut-off events. For 1846202/1846218 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45087 event pairs, 936 based on Foata normal form. 2/7589 useless extension candidates. Maximal degree in co-relation 71233. Up to 7363 conditions per place. [2024-06-21 16:48:40,918 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 534 selfloop transitions, 29 changer transitions 0/595 dead transitions. [2024-06-21 16:48:40,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 595 transitions, 8988 flow [2024-06-21 16:48:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:48:40,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 16:48:40,919 INFO L175 Difference]: Start difference. First operand has 411 places, 568 transitions, 7392 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:48:40,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 595 transitions, 8988 flow [2024-06-21 16:48:48,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 595 transitions, 8770 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:48,559 INFO L231 Difference]: Finished difference. Result has 410 places, 572 transitions, 7385 flow [2024-06-21 16:48:48,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7174, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7385, PETRI_PLACES=410, PETRI_TRANSITIONS=572} [2024-06-21 16:48:48,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-21 16:48:48,560 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 572 transitions, 7385 flow [2024-06-21 16:48:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:48,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:48,560 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 16:48:48,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:48:48,560 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 16:48:48,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash -671760965, now seen corresponding path program 2 times [2024-06-21 16:48:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:48,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278978472] [2024-06-21 16:48:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:49,272 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 16:48:49,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:49,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278978472] [2024-06-21 16:48:49,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278978472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:49,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:49,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:49,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67971674] [2024-06-21 16:48:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:49,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:49,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:48:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 572 transitions, 7385 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:48:49,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:51,343 INFO L124 PetriNetUnfolderBase]: 4937/7608 cut-off events. [2024-06-21 16:48:51,343 INFO L125 PetriNetUnfolderBase]: For 1854056/1854072 co-relation queries the response was YES. [2024-06-21 16:48:51,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71151 conditions, 7608 events. 4937/7608 cut-off events. For 1854056/1854072 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45029 event pairs, 984 based on Foata normal form. 2/7582 useless extension candidates. Maximal degree in co-relation 70950. Up to 7391 conditions per place. [2024-06-21 16:48:51,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 531 selfloop transitions, 28 changer transitions 0/591 dead transitions. [2024-06-21 16:48:51,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 591 transitions, 8549 flow [2024-06-21 16:48:51,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:48:51,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:48:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 16:48:51,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-21 16:48:51,457 INFO L175 Difference]: Start difference. First operand has 410 places, 572 transitions, 7385 flow. Second operand 9 states and 140 transitions. [2024-06-21 16:48:51,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 591 transitions, 8549 flow [2024-06-21 16:48:59,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 591 transitions, 8392 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:59,665 INFO L231 Difference]: Finished difference. Result has 415 places, 572 transitions, 7289 flow [2024-06-21 16:48:59,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7289, PETRI_PLACES=415, PETRI_TRANSITIONS=572} [2024-06-21 16:48:59,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-21 16:48:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 572 transitions, 7289 flow [2024-06-21 16:48:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:59,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:59,666 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 16:48:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:48:59,666 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 16:48:59,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash -671760841, now seen corresponding path program 1 times [2024-06-21 16:48:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:59,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975167691] [2024-06-21 16:48:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:00,299 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 16:49:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975167691] [2024-06-21 16:49:00,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975167691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:00,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:00,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:00,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403015481] [2024-06-21 16:49:00,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:00,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:00,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:00,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 572 transitions, 7289 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:00,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:00,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:00,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:02,375 INFO L124 PetriNetUnfolderBase]: 4968/7650 cut-off events. [2024-06-21 16:49:02,375 INFO L125 PetriNetUnfolderBase]: For 1893279/1893295 co-relation queries the response was YES. [2024-06-21 16:49:02,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71639 conditions, 7650 events. 4968/7650 cut-off events. For 1893279/1893295 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45281 event pairs, 986 based on Foata normal form. 2/7622 useless extension candidates. Maximal degree in co-relation 71436. Up to 7311 conditions per place. [2024-06-21 16:49:02,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 508 selfloop transitions, 67 changer transitions 0/607 dead transitions. [2024-06-21 16:49:02,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 607 transitions, 9277 flow [2024-06-21 16:49:02,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:02,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 16:49:02,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:49:02,488 INFO L175 Difference]: Start difference. First operand has 415 places, 572 transitions, 7289 flow. Second operand 8 states and 136 transitions. [2024-06-21 16:49:02,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 607 transitions, 9277 flow [2024-06-21 16:49:11,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 607 transitions, 9205 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:49:11,344 INFO L231 Difference]: Finished difference. Result has 417 places, 584 transitions, 7594 flow [2024-06-21 16:49:11,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7223, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7594, PETRI_PLACES=417, PETRI_TRANSITIONS=584} [2024-06-21 16:49:11,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-21 16:49:11,345 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 584 transitions, 7594 flow [2024-06-21 16:49:11,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:11,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:11,345 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 16:49:11,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:49:11,345 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 16:49:11,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1782553221, now seen corresponding path program 2 times [2024-06-21 16:49:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:11,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630969058] [2024-06-21 16:49:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:11,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:12,041 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 16:49:12,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:12,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630969058] [2024-06-21 16:49:12,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630969058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:12,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:12,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:12,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270260222] [2024-06-21 16:49:12,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:12,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:12,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:12,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:12,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:12,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 584 transitions, 7594 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:14,170 INFO L124 PetriNetUnfolderBase]: 4969/7654 cut-off events. [2024-06-21 16:49:14,170 INFO L125 PetriNetUnfolderBase]: For 1923629/1923645 co-relation queries the response was YES. [2024-06-21 16:49:14,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72431 conditions, 7654 events. 4969/7654 cut-off events. For 1923629/1923645 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 45318 event pairs, 987 based on Foata normal form. 3/7629 useless extension candidates. Maximal degree in co-relation 72225. Up to 7366 conditions per place. [2024-06-21 16:49:14,294 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 62 changer transitions 0/606 dead transitions. [2024-06-21 16:49:14,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 606 transitions, 9164 flow [2024-06-21 16:49:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:14,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-21 16:49:14,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-21 16:49:14,295 INFO L175 Difference]: Start difference. First operand has 417 places, 584 transitions, 7594 flow. Second operand 8 states and 132 transitions. [2024-06-21 16:49:14,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 606 transitions, 9164 flow [2024-06-21 16:49:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 606 transitions, 9086 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 16:49:22,161 INFO L231 Difference]: Finished difference. Result has 423 places, 587 transitions, 7697 flow [2024-06-21 16:49:22,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7526, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7697, PETRI_PLACES=423, PETRI_TRANSITIONS=587} [2024-06-21 16:49:22,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-21 16:49:22,162 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 587 transitions, 7697 flow [2024-06-21 16:49:22,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:22,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:22,162 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 16:49:22,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:49:22,162 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 16:49:22,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1782548571, now seen corresponding path program 3 times [2024-06-21 16:49:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971522284] [2024-06-21 16:49:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:22,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:22,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971522284] [2024-06-21 16:49:22,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971522284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:22,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:22,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:22,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596788569] [2024-06-21 16:49:22,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:22,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:22,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:22,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:22,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:22,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:22,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 587 transitions, 7697 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:22,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:22,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:22,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:24,927 INFO L124 PetriNetUnfolderBase]: 4980/7671 cut-off events. [2024-06-21 16:49:24,927 INFO L125 PetriNetUnfolderBase]: For 1941531/1941547 co-relation queries the response was YES. [2024-06-21 16:49:25,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72837 conditions, 7671 events. 4980/7671 cut-off events. For 1941531/1941547 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45426 event pairs, 987 based on Foata normal form. 2/7645 useless extension candidates. Maximal degree in co-relation 72629. Up to 7371 conditions per place. [2024-06-21 16:49:25,180 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 511 selfloop transitions, 67 changer transitions 0/610 dead transitions. [2024-06-21 16:49:25,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 610 transitions, 9277 flow [2024-06-21 16:49:25,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 16:49:25,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-21 16:49:25,181 INFO L175 Difference]: Start difference. First operand has 423 places, 587 transitions, 7697 flow. Second operand 8 states and 134 transitions. [2024-06-21 16:49:25,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 610 transitions, 9277 flow [2024-06-21 16:49:32,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 610 transitions, 9134 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:32,617 INFO L231 Difference]: Finished difference. Result has 425 places, 590 transitions, 7740 flow [2024-06-21 16:49:32,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7554, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7740, PETRI_PLACES=425, PETRI_TRANSITIONS=590} [2024-06-21 16:49:32,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-21 16:49:32,617 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 590 transitions, 7740 flow [2024-06-21 16:49:32,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:32,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:32,617 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 16:49:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:49:32,617 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 16:49:32,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash -553673161, now seen corresponding path program 4 times [2024-06-21 16:49:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264203975] [2024-06-21 16:49:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:32,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:33,326 INFO 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 16:49:33,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:33,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264203975] [2024-06-21 16:49:33,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264203975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:33,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:33,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:33,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75994243] [2024-06-21 16:49:33,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:33,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:33,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 590 transitions, 7740 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:33,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:33,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:33,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:35,655 INFO L124 PetriNetUnfolderBase]: 5008/7711 cut-off events. [2024-06-21 16:49:35,656 INFO L125 PetriNetUnfolderBase]: For 1987940/1987956 co-relation queries the response was YES. [2024-06-21 16:49:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73592 conditions, 7711 events. 5008/7711 cut-off events. For 1987940/1987956 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 45709 event pairs, 984 based on Foata normal form. 2/7685 useless extension candidates. Maximal degree in co-relation 73383. Up to 7390 conditions per place. [2024-06-21 16:49:35,771 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 522 selfloop transitions, 69 changer transitions 0/623 dead transitions. [2024-06-21 16:49:35,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 623 transitions, 9368 flow [2024-06-21 16:49:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 16:49:35,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-21 16:49:35,772 INFO L175 Difference]: Start difference. First operand has 425 places, 590 transitions, 7740 flow. Second operand 9 states and 153 transitions. [2024-06-21 16:49:35,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 623 transitions, 9368 flow [2024-06-21 16:49:43,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 623 transitions, 9213 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:43,084 INFO L231 Difference]: Finished difference. Result has 428 places, 596 transitions, 7829 flow [2024-06-21 16:49:43,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7585, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7829, PETRI_PLACES=428, PETRI_TRANSITIONS=596} [2024-06-21 16:49:43,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-21 16:49:43,084 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 596 transitions, 7829 flow [2024-06-21 16:49:43,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:43,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:43,084 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 16:49:43,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:49:43,084 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 16:49:43,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash -553495531, now seen corresponding path program 5 times [2024-06-21 16:49:43,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:43,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018769867] [2024-06-21 16:49:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:43,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:43,862 INFO 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 16:49:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:43,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018769867] [2024-06-21 16:49:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018769867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:43,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:43,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331925200] [2024-06-21 16:49:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:43,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:43,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:43,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:43,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:43,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:43,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 596 transitions, 7829 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:43,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:43,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:43,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:46,149 INFO L124 PetriNetUnfolderBase]: 5021/7730 cut-off events. [2024-06-21 16:49:46,150 INFO L125 PetriNetUnfolderBase]: For 2026131/2026147 co-relation queries the response was YES. [2024-06-21 16:49:46,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73939 conditions, 7730 events. 5021/7730 cut-off events. For 2026131/2026147 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45826 event pairs, 987 based on Foata normal form. 3/7705 useless extension candidates. Maximal degree in co-relation 73730. Up to 7437 conditions per place. [2024-06-21 16:49:46,271 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 526 selfloop transitions, 62 changer transitions 0/620 dead transitions. [2024-06-21 16:49:46,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 620 transitions, 9447 flow [2024-06-21 16:49:46,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:46,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:46,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 16:49:46,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 16:49:46,272 INFO L175 Difference]: Start difference. First operand has 428 places, 596 transitions, 7829 flow. Second operand 9 states and 145 transitions. [2024-06-21 16:49:46,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 620 transitions, 9447 flow [2024-06-21 16:49:53,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 620 transitions, 9338 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:53,350 INFO L231 Difference]: Finished difference. Result has 432 places, 599 transitions, 7909 flow [2024-06-21 16:49:53,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7720, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7909, PETRI_PLACES=432, PETRI_TRANSITIONS=599} [2024-06-21 16:49:53,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-21 16:49:53,350 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 599 transitions, 7909 flow [2024-06-21 16:49:53,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:53,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:53,351 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 16:49:53,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:49:53,351 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 16:49:53,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1933657209, now seen corresponding path program 6 times [2024-06-21 16:49:53,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:53,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490832857] [2024-06-21 16:49:53,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:53,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:54,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:54,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490832857] [2024-06-21 16:49:54,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490832857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:54,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305737703] [2024-06-21 16:49:54,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:54,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:54,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:54,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:54,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:54,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:49:54,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 599 transitions, 7909 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:54,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:54,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:49:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:56,348 INFO L124 PetriNetUnfolderBase]: 5036/7751 cut-off events. [2024-06-21 16:49:56,348 INFO L125 PetriNetUnfolderBase]: For 2053909/2053925 co-relation queries the response was YES. [2024-06-21 16:49:56,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74446 conditions, 7751 events. 5036/7751 cut-off events. For 2053909/2053925 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45951 event pairs, 988 based on Foata normal form. 3/7726 useless extension candidates. Maximal degree in co-relation 74235. Up to 7528 conditions per place. [2024-06-21 16:49:56,595 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 38 changer transitions 0/622 dead transitions. [2024-06-21 16:49:56,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 622 transitions, 9569 flow [2024-06-21 16:49:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:56,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-21 16:49:56,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-21 16:49:56,596 INFO L175 Difference]: Start difference. First operand has 432 places, 599 transitions, 7909 flow. Second operand 9 states and 137 transitions. [2024-06-21 16:49:56,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 622 transitions, 9569 flow [2024-06-21 16:50:04,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 622 transitions, 9405 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:04,368 INFO L231 Difference]: Finished difference. Result has 435 places, 605 transitions, 8005 flow [2024-06-21 16:50:04,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7749, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8005, PETRI_PLACES=435, PETRI_TRANSITIONS=605} [2024-06-21 16:50:04,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-21 16:50:04,369 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 605 transitions, 8005 flow [2024-06-21 16:50:04,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:04,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:04,370 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 16:50:04,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:50:04,370 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 16:50:04,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1416855861, now seen corresponding path program 7 times [2024-06-21 16:50:04,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:04,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134537823] [2024-06-21 16:50:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:05,179 INFO 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 16:50:05,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134537823] [2024-06-21 16:50:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134537823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:05,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:05,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:05,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373380645] [2024-06-21 16:50:05,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:05,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:05,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:05,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:05,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:05,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-21 16:50:05,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 605 transitions, 8005 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:05,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:05,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-21 16:50:05,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:07,578 INFO L124 PetriNetUnfolderBase]: 5026/7736 cut-off events. [2024-06-21 16:50:07,578 INFO L125 PetriNetUnfolderBase]: For 2052580/2052596 co-relation queries the response was YES. [2024-06-21 16:50:07,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74043 conditions, 7736 events. 5026/7736 cut-off events. For 2052580/2052596 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45790 event pairs, 988 based on Foata normal form. 3/7711 useless extension candidates. Maximal degree in co-relation 73830. Up to 7528 conditions per place. [2024-06-21 16:50:07,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 562 selfloop transitions, 26 changer transitions 0/620 dead transitions. [2024-06-21 16:50:07,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 620 transitions, 9221 flow [2024-06-21 16:50:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 132 transitions. [2024-06-21 16:50:07,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35772357723577236 [2024-06-21 16:50:07,848 INFO L175 Difference]: Start difference. First operand has 435 places, 605 transitions, 8005 flow. Second operand 9 states and 132 transitions. [2024-06-21 16:50:07,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 620 transitions, 9221 flow [2024-06-21 16:50:15,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 9085 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:15,973 INFO L231 Difference]: Finished difference. Result has 438 places, 605 transitions, 7928 flow [2024-06-21 16:50:15,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7869, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7928, PETRI_PLACES=438, PETRI_TRANSITIONS=605} [2024-06-21 16:50:15,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 16:50:15,973 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 605 transitions, 7928 flow [2024-06-21 16:50:15,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:15,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:15,973 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 16:50:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:50:15,974 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 16:50:15,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1425433685, now seen corresponding path program 1 times [2024-06-21 16:50:15,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466506289] [2024-06-21 16:50:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:16,694 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 16:50:16,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:16,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466506289] [2024-06-21 16:50:16,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466506289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:16,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:16,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:16,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866225235] [2024-06-21 16:50:16,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:16,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:16,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:16,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:50:16,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 605 transitions, 7928 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:16,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:16,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:50:16,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:19,027 INFO L124 PetriNetUnfolderBase]: 5209/7936 cut-off events. [2024-06-21 16:50:19,027 INFO L125 PetriNetUnfolderBase]: For 2330377/2330377 co-relation queries the response was YES. [2024-06-21 16:50:19,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78804 conditions, 7936 events. 5209/7936 cut-off events. For 2330377/2330377 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46181 event pairs, 1072 based on Foata normal form. 1/7937 useless extension candidates. Maximal degree in co-relation 78590. Up to 7903 conditions per place. [2024-06-21 16:50:19,150 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 595 selfloop transitions, 22 changer transitions 0/620 dead transitions. [2024-06-21 16:50:19,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 620 transitions, 9235 flow [2024-06-21 16:50:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-21 16:50:19,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-21 16:50:19,151 INFO L175 Difference]: Start difference. First operand has 438 places, 605 transitions, 7928 flow. Second operand 8 states and 112 transitions. [2024-06-21 16:50:19,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 620 transitions, 9235 flow [2024-06-21 16:50:27,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 9094 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-21 16:50:27,264 INFO L231 Difference]: Finished difference. Result has 438 places, 608 transitions, 7890 flow [2024-06-21 16:50:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7793, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7890, PETRI_PLACES=438, PETRI_TRANSITIONS=608} [2024-06-21 16:50:27,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-21 16:50:27,265 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 608 transitions, 7890 flow [2024-06-21 16:50:27,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:27,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:27,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:27,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:50:27,265 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 16:50:27,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:27,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1337740966, now seen corresponding path program 1 times [2024-06-21 16:50:27,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:27,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304759954] [2024-06-21 16:50:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:27,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:27,978 INFO 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 16:50:27,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304759954] [2024-06-21 16:50:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304759954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:27,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:27,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:27,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722143143] [2024-06-21 16:50:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:28,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:50:28,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 608 transitions, 7890 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:28,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:28,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:50:28,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:30,387 INFO L124 PetriNetUnfolderBase]: 5203/7928 cut-off events. [2024-06-21 16:50:30,387 INFO L125 PetriNetUnfolderBase]: For 2352951/2352951 co-relation queries the response was YES. [2024-06-21 16:50:30,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78516 conditions, 7928 events. 5203/7928 cut-off events. For 2352951/2352951 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 46172 event pairs, 1063 based on Foata normal form. 2/7930 useless extension candidates. Maximal degree in co-relation 78301. Up to 7704 conditions per place. [2024-06-21 16:50:30,509 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 571 selfloop transitions, 63 changer transitions 0/637 dead transitions. [2024-06-21 16:50:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 637 transitions, 9524 flow [2024-06-21 16:50:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-21 16:50:30,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-21 16:50:30,510 INFO L175 Difference]: Start difference. First operand has 438 places, 608 transitions, 7890 flow. Second operand 8 states and 135 transitions. [2024-06-21 16:50:30,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 637 transitions, 9524 flow [2024-06-21 16:50:37,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 637 transitions, 9456 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 16:50:37,665 INFO L231 Difference]: Finished difference. Result has 439 places, 608 transitions, 7962 flow [2024-06-21 16:50:37,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7822, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7962, PETRI_PLACES=439, PETRI_TRANSITIONS=608} [2024-06-21 16:50:37,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-21 16:50:37,666 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 608 transitions, 7962 flow [2024-06-21 16:50:37,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:37,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:37,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:37,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:50:37,666 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 16:50:37,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1540194832, now seen corresponding path program 2 times [2024-06-21 16:50:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222970555] [2024-06-21 16:50:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:37,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222970555] [2024-06-21 16:50:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222970555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:38,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:38,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:38,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841445635] [2024-06-21 16:50:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:38,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:50:38,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 608 transitions, 7962 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:38,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:50:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:40,765 INFO L124 PetriNetUnfolderBase]: 5208/7935 cut-off events. [2024-06-21 16:50:40,765 INFO L125 PetriNetUnfolderBase]: For 2374001/2374001 co-relation queries the response was YES. [2024-06-21 16:50:40,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79010 conditions, 7935 events. 5208/7935 cut-off events. For 2374001/2374001 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46191 event pairs, 1069 based on Foata normal form. 1/7936 useless extension candidates. Maximal degree in co-relation 78794. Up to 7840 conditions per place. [2024-06-21 16:50:41,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 591 selfloop transitions, 41 changer transitions 0/635 dead transitions. [2024-06-21 16:50:41,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 635 transitions, 9369 flow [2024-06-21 16:50:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:50:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:50:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-21 16:50:41,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:50:41,032 INFO L175 Difference]: Start difference. First operand has 439 places, 608 transitions, 7962 flow. Second operand 8 states and 128 transitions. [2024-06-21 16:50:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 635 transitions, 9369 flow [2024-06-21 16:50:49,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 635 transitions, 9251 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:49,289 INFO L231 Difference]: Finished difference. Result has 441 places, 611 transitions, 8023 flow [2024-06-21 16:50:49,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8023, PETRI_PLACES=441, PETRI_TRANSITIONS=611} [2024-06-21 16:50:49,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-21 16:50:49,289 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 611 transitions, 8023 flow [2024-06-21 16:50:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:49,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:49,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:49,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:50:49,289 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 16:50:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1020190581, now seen corresponding path program 1 times [2024-06-21 16:50:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:49,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111033585] [2024-06-21 16:50:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:49,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:50,172 INFO 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 16:50:50,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:50,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111033585] [2024-06-21 16:50:50,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111033585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:50,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:50,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:50:50,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949534020] [2024-06-21 16:50:50,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:50,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:50:50,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:50:50,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:50:50,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:50:50,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 611 transitions, 8023 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:50:50,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:50,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:50:50,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:52,651 INFO L124 PetriNetUnfolderBase]: 5216/7947 cut-off events. [2024-06-21 16:50:52,651 INFO L125 PetriNetUnfolderBase]: For 2385882/2385882 co-relation queries the response was YES. [2024-06-21 16:50:52,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78989 conditions, 7947 events. 5216/7947 cut-off events. For 2385882/2385882 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 46093 event pairs, 917 based on Foata normal form. 2/7949 useless extension candidates. Maximal degree in co-relation 78773. Up to 7712 conditions per place. [2024-06-21 16:50:52,778 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 579 selfloop transitions, 65 changer transitions 0/647 dead transitions. [2024-06-21 16:50:52,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 647 transitions, 9751 flow [2024-06-21 16:50:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-21 16:50:52,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-21 16:50:52,779 INFO L175 Difference]: Start difference. First operand has 441 places, 611 transitions, 8023 flow. Second operand 9 states and 146 transitions. [2024-06-21 16:50:52,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 647 transitions, 9751 flow [2024-06-21 16:51:01,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 647 transitions, 9647 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:01,505 INFO L231 Difference]: Finished difference. Result has 443 places, 615 transitions, 8128 flow [2024-06-21 16:51:01,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8128, PETRI_PLACES=443, PETRI_TRANSITIONS=615} [2024-06-21 16:51:01,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-21 16:51:01,505 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 615 transitions, 8128 flow [2024-06-21 16:51:01,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:51:01,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:01,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:01,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:51:01,505 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 16:51:01,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1476233797, now seen corresponding path program 2 times [2024-06-21 16:51:01,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:01,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343061852] [2024-06-21 16:51:01,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:02,427 INFO 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 16:51:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:02,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343061852] [2024-06-21 16:51:02,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343061852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:02,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:02,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:51:02,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179888965] [2024-06-21 16:51:02,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:02,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:51:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:51:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:51:02,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:51:02,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 615 transitions, 8128 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:51:02,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:02,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:51:02,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:04,937 INFO L124 PetriNetUnfolderBase]: 5237/7978 cut-off events. [2024-06-21 16:51:04,937 INFO L125 PetriNetUnfolderBase]: For 2408612/2408612 co-relation queries the response was YES. [2024-06-21 16:51:05,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79724 conditions, 7978 events. 5237/7978 cut-off events. For 2408612/2408612 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46476 event pairs, 1057 based on Foata normal form. 2/7980 useless extension candidates. Maximal degree in co-relation 79508. Up to 7815 conditions per place. [2024-06-21 16:51:05,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 583 selfloop transitions, 62 changer transitions 0/648 dead transitions. [2024-06-21 16:51:05,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 648 transitions, 9860 flow [2024-06-21 16:51:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-21 16:51:05,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-21 16:51:05,204 INFO L175 Difference]: Start difference. First operand has 443 places, 615 transitions, 8128 flow. Second operand 9 states and 144 transitions. [2024-06-21 16:51:05,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 648 transitions, 9860 flow [2024-06-21 16:51:13,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 648 transitions, 9713 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:13,191 INFO L231 Difference]: Finished difference. Result has 447 places, 619 transitions, 8190 flow [2024-06-21 16:51:13,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8013, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8190, PETRI_PLACES=447, PETRI_TRANSITIONS=619} [2024-06-21 16:51:13,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-21 16:51:13,191 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 619 transitions, 8190 flow [2024-06-21 16:51:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:51:13,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:13,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:13,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:51:13,192 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 16:51:13,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1476224497, now seen corresponding path program 3 times [2024-06-21 16:51:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945027150] [2024-06-21 16:51:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:14,131 INFO 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 16:51:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945027150] [2024-06-21 16:51:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945027150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:14,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:51:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980713537] [2024-06-21 16:51:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:51:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:51:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:51:14,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:51:14,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 619 transitions, 8190 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:51:14,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:14,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:51:14,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:16,802 INFO L124 PetriNetUnfolderBase]: 5232/7971 cut-off events. [2024-06-21 16:51:16,802 INFO L125 PetriNetUnfolderBase]: For 2418033/2418033 co-relation queries the response was YES. [2024-06-21 16:51:16,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79562 conditions, 7971 events. 5232/7971 cut-off events. For 2418033/2418033 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 46450 event pairs, 1058 based on Foata normal form. 2/7973 useless extension candidates. Maximal degree in co-relation 79344. Up to 7825 conditions per place. [2024-06-21 16:51:16,929 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 583 selfloop transitions, 60 changer transitions 0/646 dead transitions. [2024-06-21 16:51:16,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 646 transitions, 9546 flow [2024-06-21 16:51:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 16:51:16,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-21 16:51:16,930 INFO L175 Difference]: Start difference. First operand has 447 places, 619 transitions, 8190 flow. Second operand 9 states and 142 transitions. [2024-06-21 16:51:16,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 646 transitions, 9546 flow [2024-06-21 16:51:25,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 646 transitions, 9452 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:25,529 INFO L231 Difference]: Finished difference. Result has 451 places, 619 transitions, 8221 flow [2024-06-21 16:51:25,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8221, PETRI_PLACES=451, PETRI_TRANSITIONS=619} [2024-06-21 16:51:25,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-21 16:51:25,530 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 619 transitions, 8221 flow [2024-06-21 16:51:25,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 16:51:25,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:25,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:25,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:51:25,531 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 16:51:25,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2146211033, now seen corresponding path program 1 times [2024-06-21 16:51:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:25,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105977633] [2024-06-21 16:51:25,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:25,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:26,110 INFO 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 16:51:26,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:26,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105977633] [2024-06-21 16:51:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105977633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:26,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:26,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:26,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440890226] [2024-06-21 16:51:26,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:26,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:26,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:26,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:26,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:26,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:51:26,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 619 transitions, 8221 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:26,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:26,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:51:26,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:28,507 INFO L124 PetriNetUnfolderBase]: 5284/8043 cut-off events. [2024-06-21 16:51:28,507 INFO L125 PetriNetUnfolderBase]: For 2519189/2519189 co-relation queries the response was YES. [2024-06-21 16:51:28,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81214 conditions, 8043 events. 5284/8043 cut-off events. For 2519189/2519189 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46877 event pairs, 1060 based on Foata normal form. 4/8047 useless extension candidates. Maximal degree in co-relation 80994. Up to 7740 conditions per place. [2024-06-21 16:51:28,650 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 578 selfloop transitions, 90 changer transitions 0/671 dead transitions. [2024-06-21 16:51:28,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 671 transitions, 10301 flow [2024-06-21 16:51:28,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:28,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-21 16:51:28,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-21 16:51:28,651 INFO L175 Difference]: Start difference. First operand has 451 places, 619 transitions, 8221 flow. Second operand 9 states and 152 transitions. [2024-06-21 16:51:28,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 671 transitions, 10301 flow [2024-06-21 16:51:38,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 671 transitions, 10152 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:51:38,363 INFO L231 Difference]: Finished difference. Result has 453 places, 639 transitions, 8606 flow [2024-06-21 16:51:38,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8606, PETRI_PLACES=453, PETRI_TRANSITIONS=639} [2024-06-21 16:51:38,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-21 16:51:38,364 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 639 transitions, 8606 flow [2024-06-21 16:51:38,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:38,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:38,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:38,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:51:38,364 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 16:51:38,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1217853571, now seen corresponding path program 2 times [2024-06-21 16:51:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:38,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790125786] [2024-06-21 16:51:38,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:38,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:38,920 INFO 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 16:51:38,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:38,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790125786] [2024-06-21 16:51:38,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790125786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:38,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:38,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237927195] [2024-06-21 16:51:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:38,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:38,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:38,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:39,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:51:39,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 639 transitions, 8606 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:39,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:39,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:51:39,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:41,438 INFO L124 PetriNetUnfolderBase]: 5310/8079 cut-off events. [2024-06-21 16:51:41,438 INFO L125 PetriNetUnfolderBase]: For 2557168/2557168 co-relation queries the response was YES. [2024-06-21 16:51:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83320 conditions, 8079 events. 5310/8079 cut-off events. For 2557168/2557168 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 47090 event pairs, 1069 based on Foata normal form. 2/8081 useless extension candidates. Maximal degree in co-relation 83098. Up to 7916 conditions per place. [2024-06-21 16:51:41,570 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 588 selfloop transitions, 82 changer transitions 0/673 dead transitions. [2024-06-21 16:51:41,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 673 transitions, 10505 flow [2024-06-21 16:51:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 16:51:41,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-21 16:51:41,571 INFO L175 Difference]: Start difference. First operand has 453 places, 639 transitions, 8606 flow. Second operand 9 states and 145 transitions. [2024-06-21 16:51:41,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 673 transitions, 10505 flow [2024-06-21 16:51:48,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 673 transitions, 10325 flow, removed 82 selfloop flow, removed 3 redundant places. [2024-06-21 16:51:48,547 INFO L231 Difference]: Finished difference. Result has 459 places, 646 transitions, 8793 flow [2024-06-21 16:51:48,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8454, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8793, PETRI_PLACES=459, PETRI_TRANSITIONS=646} [2024-06-21 16:51:48,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-21 16:51:48,548 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 646 transitions, 8793 flow [2024-06-21 16:51:48,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:48,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:48,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:48,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:51:48,548 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 16:51:48,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:48,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1402723137, now seen corresponding path program 3 times [2024-06-21 16:51:48,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:48,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621770357] [2024-06-21 16:51:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:48,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:49,097 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 16:51:49,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:49,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621770357] [2024-06-21 16:51:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621770357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:49,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025315387] [2024-06-21 16:51:49,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:49,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:49,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:51:49,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 646 transitions, 8793 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:49,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:49,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:51:49,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:51,638 INFO L124 PetriNetUnfolderBase]: 5304/8071 cut-off events. [2024-06-21 16:51:51,639 INFO L125 PetriNetUnfolderBase]: For 2571705/2571705 co-relation queries the response was YES. [2024-06-21 16:51:51,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82651 conditions, 8071 events. 5304/8071 cut-off events. For 2571705/2571705 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 47058 event pairs, 1070 based on Foata normal form. 2/8073 useless extension candidates. Maximal degree in co-relation 82427. Up to 7925 conditions per place. [2024-06-21 16:51:51,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 591 selfloop transitions, 77 changer transitions 0/671 dead transitions. [2024-06-21 16:51:51,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 671 transitions, 10193 flow [2024-06-21 16:51:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 16:51:51,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-21 16:51:51,778 INFO L175 Difference]: Start difference. First operand has 459 places, 646 transitions, 8793 flow. Second operand 9 states and 141 transitions. [2024-06-21 16:51:51,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 671 transitions, 10193 flow [2024-06-21 16:51:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 671 transitions, 9975 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-21 16:51:59,751 INFO L231 Difference]: Finished difference. Result has 464 places, 646 transitions, 8735 flow [2024-06-21 16:51:59,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8575, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8735, PETRI_PLACES=464, PETRI_TRANSITIONS=646} [2024-06-21 16:51:59,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-21 16:51:59,752 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 646 transitions, 8735 flow [2024-06-21 16:51:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:59,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:59,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:59,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:51:59,752 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 16:51:59,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash -2007682883, now seen corresponding path program 4 times [2024-06-21 16:51:59,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:59,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841389636] [2024-06-21 16:51:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:59,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:00,368 INFO 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 16:52:00,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:00,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841389636] [2024-06-21 16:52:00,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841389636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:00,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:00,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:00,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690734341] [2024-06-21 16:52:00,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:00,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:00,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:00,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:00,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:52:00,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 646 transitions, 8735 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:00,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:00,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:52:00,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:02,868 INFO L124 PetriNetUnfolderBase]: 5422/8234 cut-off events. [2024-06-21 16:52:02,868 INFO L125 PetriNetUnfolderBase]: For 2779734/2779734 co-relation queries the response was YES. [2024-06-21 16:52:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85927 conditions, 8234 events. 5422/8234 cut-off events. For 2779734/2779734 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48063 event pairs, 1043 based on Foata normal form. 6/8240 useless extension candidates. Maximal degree in co-relation 85701. Up to 7320 conditions per place. [2024-06-21 16:52:03,005 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 546 selfloop transitions, 143 changer transitions 0/692 dead transitions. [2024-06-21 16:52:03,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 692 transitions, 11233 flow [2024-06-21 16:52:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:52:03,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-21 16:52:03,006 INFO L175 Difference]: Start difference. First operand has 464 places, 646 transitions, 8735 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:52:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 692 transitions, 11233 flow [2024-06-21 16:52:12,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 692 transitions, 11065 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 16:52:12,958 INFO L231 Difference]: Finished difference. Result has 467 places, 659 transitions, 9276 flow [2024-06-21 16:52:12,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8567, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9276, PETRI_PLACES=467, PETRI_TRANSITIONS=659} [2024-06-21 16:52:12,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-21 16:52:12,958 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 659 transitions, 9276 flow [2024-06-21 16:52:12,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:12,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:12,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:12,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:52:12,959 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 16:52:12,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:12,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2002232122, now seen corresponding path program 1 times [2024-06-21 16:52:12,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:12,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320736514] [2024-06-21 16:52:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:13,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320736514] [2024-06-21 16:52:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320736514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:13,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:52:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305272343] [2024-06-21 16:52:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:52:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:52:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:52:13,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-21 16:52:13,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 659 transitions, 9276 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:13,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:13,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-21 16:52:13,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:16,200 INFO L124 PetriNetUnfolderBase]: 5437/8255 cut-off events. [2024-06-21 16:52:16,200 INFO L125 PetriNetUnfolderBase]: For 2787185/2787185 co-relation queries the response was YES. [2024-06-21 16:52:16,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88168 conditions, 8255 events. 5437/8255 cut-off events. For 2787185/2787185 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 48150 event pairs, 1067 based on Foata normal form. 3/8258 useless extension candidates. Maximal degree in co-relation 87939. Up to 7747 conditions per place. [2024-06-21 16:52:16,337 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 593 selfloop transitions, 95 changer transitions 0/691 dead transitions. [2024-06-21 16:52:16,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 691 transitions, 11427 flow [2024-06-21 16:52:16,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:52:16,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:52:16,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 16:52:16,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-21 16:52:16,339 INFO L175 Difference]: Start difference. First operand has 467 places, 659 transitions, 9276 flow. Second operand 8 states and 137 transitions. [2024-06-21 16:52:16,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 691 transitions, 11427 flow Killed by 15