./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-28 03:34:37,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:34:37,891 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:34:37,895 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:34:37,895 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:34:37,920 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:34:37,921 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:34:37,922 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:34:37,922 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:34:37,927 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:34:37,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:34:37,928 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:34:37,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:34:37,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:34:37,928 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:34:37,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:34:37,929 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:34:37,929 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:34:37,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:34:37,930 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:34:37,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:34:37,930 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:34:37,931 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:34:37,931 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:34:37,931 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:34:37,931 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:34:37,932 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:34:37,932 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:34:37,932 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:34:37,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:34:37,932 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:34:37,933 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:34:37,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:34:37,933 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:34:37,933 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:34:37,934 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:34:37,934 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:34:37,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:34:37,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:34:37,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:34:37,935 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:34:37,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:34:37,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:34:37,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:34:38,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:34:38,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:34:38,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:34:38,131 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:34:38,132 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:34:38,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-28 03:34:39,215 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:34:39,428 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:34:39,431 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-28 03:34:39,444 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbb5c30c/07dec171fe274dc180d664138685dc9b/FLAGb4769a4ae [2024-06-28 03:34:39,455 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbbb5c30c/07dec171fe274dc180d664138685dc9b [2024-06-28 03:34:39,457 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:34:39,457 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:34:39,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-28 03:34:39,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:34:39,588 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:34:39,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:34:39,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:34:39,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:34:39,594 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:34:39" (1/2) ... [2024-06-28 03:34:39,601 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a31ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:34:39, skipping insertion in model container [2024-06-28 03:34:39,601 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:34:39" (1/2) ... [2024-06-28 03:34:39,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c6079a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:34:39, skipping insertion in model container [2024-06-28 03:34:39,602 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:34:39" (2/2) ... [2024-06-28 03:34:39,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a31ce1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:39, skipping insertion in model container [2024-06-28 03:34:39,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:34:39" (2/2) ... [2024-06-28 03:34:39,604 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:34:39,659 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:34:39,661 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:34:39,661 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:34:39,661 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd3 == (_Bool)0) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) [2024-06-28 03:34:39,661 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:34:39,661 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-28 03:34:39,697 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:34:40,006 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:34:40,016 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:34:40,137 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:34:40,187 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:34:40,187 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40 WrapperNode [2024-06-28 03:34:40,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:34:40,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:34:40,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:34:40,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:34:40,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,207 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,238 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-28 03:34:40,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:34:40,242 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:34:40,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:34:40,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:34:40,252 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,255 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,268 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]. [2024-06-28 03:34:40,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,268 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,280 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,283 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:34:40,284 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:34:40,284 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:34:40,284 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:34:40,285 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (1/1) ... [2024-06-28 03:34:40,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:34:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:34:40,309 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) [2024-06-28 03:34:40,317 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 [2024-06-28 03:34:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:34:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:34:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:34:40,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:34:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:34:40,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:34:40,352 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:34:40,352 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:34:40,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:34:40,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:34:40,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:34:40,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:34:40,355 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:34:40,447 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:34:40,449 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:34:40,741 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:34:40,743 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:34:40,891 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:34:40,891 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:34:40,892 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:34:40 BoogieIcfgContainer [2024-06-28 03:34:40,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:34:40,895 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:34:40,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:34:40,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:34:40,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:34:39" (1/4) ... [2024-06-28 03:34:40,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56775555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:34:40, skipping insertion in model container [2024-06-28 03:34:40,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:34:39" (2/4) ... [2024-06-28 03:34:40,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56775555 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:34:40, skipping insertion in model container [2024-06-28 03:34:40,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:34:40" (3/4) ... [2024-06-28 03:34:40,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56775555 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:34:40, skipping insertion in model container [2024-06-28 03:34:40,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:34:40" (4/4) ... [2024-06-28 03:34:40,902 INFO L112 eAbstractionObserver]: Analyzing ICFG mix052_power.oepc_power.opt_pso.oepc_rmo.oepc.i [2024-06-28 03:34:40,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:34:40,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:34:40,918 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:34:40,971 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:34:41,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 03:34:41,048 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-28 03:34:41,048 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:34:41,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:34:41,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-28 03:34:41,054 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-28 03:34:41,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:34:41,075 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;@6fe97e1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:34:41,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:34:41,081 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:34:41,082 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:34:41,082 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:34:41,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:41,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:34:41,083 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)] === [2024-06-28 03:34:41,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 366539877, now seen corresponding path program 1 times [2024-06-28 03:34:41,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845548671] [2024-06-28 03:34:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:41,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:41,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:41,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845548671] [2024-06-28 03:34:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845548671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:41,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:41,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:34:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284115612] [2024-06-28 03:34:41,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:34:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:34:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:34:41,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 03:34:41,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:41,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:41,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 03:34:41,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:42,176 INFO L124 PetriNetUnfolderBase]: 1363/2074 cut-off events. [2024-06-28 03:34:42,177 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-28 03:34:42,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4198 conditions, 2074 events. 1363/2074 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9696 event pairs, 964 based on Foata normal form. 1/2036 useless extension candidates. Maximal degree in co-relation 4186. Up to 2037 conditions per place. [2024-06-28 03:34:42,189 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-28 03:34:42,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 169 flow [2024-06-28 03:34:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:34:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:34:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-28 03:34:42,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-28 03:34:42,199 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 72 transitions. [2024-06-28 03:34:42,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 169 flow [2024-06-28 03:34:42,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:34:42,202 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-28 03:34:42,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-28 03:34:42,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-28 03:34:42,206 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-28 03:34:42,206 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) [2024-06-28 03:34:42,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:42,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:42,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:34:42,207 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)] === [2024-06-28 03:34:42,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash 58400200, now seen corresponding path program 1 times [2024-06-28 03:34:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:42,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144300098] [2024-06-28 03:34:42,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:42,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:42,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144300098] [2024-06-28 03:34:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144300098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:42,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:42,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:34:42,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070737048] [2024-06-28 03:34:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:42,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:34:42,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:34:42,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:34:42,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 03:34:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 03:34:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:43,052 INFO L124 PetriNetUnfolderBase]: 1357/2070 cut-off events. [2024-06-28 03:34:43,052 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-28 03:34:43,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4737 conditions, 2070 events. 1357/2070 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9665 event pairs, 840 based on Foata normal form. 3/2073 useless extension candidates. Maximal degree in co-relation 4725. Up to 2013 conditions per place. [2024-06-28 03:34:43,061 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 39 selfloop transitions, 7 changer transitions 0/51 dead transitions. [2024-06-28 03:34:43,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 236 flow [2024-06-28 03:34:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:34:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:34:43,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-28 03:34:43,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-28 03:34:43,063 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 93 transitions. [2024-06-28 03:34:43,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 236 flow [2024-06-28 03:34:43,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 51 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:34:43,064 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 134 flow [2024-06-28 03:34:43,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-28 03:34:43,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2024-06-28 03:34:43,065 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 134 flow [2024-06-28 03:34:43,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:43,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:43,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:43,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:34:43,066 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)] === [2024-06-28 03:34:43,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:43,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1810407254, now seen corresponding path program 1 times [2024-06-28 03:34:43,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:43,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065792666] [2024-06-28 03:34:43,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:43,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:43,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065792666] [2024-06-28 03:34:43,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065792666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:43,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:43,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-28 03:34:43,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005953999] [2024-06-28 03:34:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:43,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-28 03:34:43,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:43,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-28 03:34:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-28 03:34:43,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 03:34:43,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:43,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:43,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 03:34:43,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:43,843 INFO L124 PetriNetUnfolderBase]: 1411/2146 cut-off events. [2024-06-28 03:34:43,843 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-28 03:34:43,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2146 events. 1411/2146 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10031 event pairs, 629 based on Foata normal form. 7/2152 useless extension candidates. Maximal degree in co-relation 5460. Up to 1982 conditions per place. [2024-06-28 03:34:43,853 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-28 03:34:43,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 75 transitions, 398 flow [2024-06-28 03:34:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:34:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:34:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-28 03:34:43,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-28 03:34:43,855 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 134 flow. Second operand 5 states and 124 transitions. [2024-06-28 03:34:43,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 75 transitions, 398 flow [2024-06-28 03:34:43,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 384 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-28 03:34:43,858 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 235 flow [2024-06-28 03:34:43,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-06-28 03:34:43,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-28 03:34:43,859 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 235 flow [2024-06-28 03:34:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:43,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:43,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:34:43,859 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)] === [2024-06-28 03:34:43,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash -543117789, now seen corresponding path program 1 times [2024-06-28 03:34:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876810542] [2024-06-28 03:34:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:44,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876810542] [2024-06-28 03:34:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876810542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:44,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:44,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:34:44,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106259634] [2024-06-28 03:34:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:44,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:34:44,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:44,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:34:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:34:44,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 03:34:44,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:44,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:44,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 03:34:44,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:44,909 INFO L124 PetriNetUnfolderBase]: 1433/2180 cut-off events. [2024-06-28 03:34:44,909 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-28 03:34:44,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 2180 events. 1433/2180 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10319 event pairs, 476 based on Foata normal form. 7/2186 useless extension candidates. Maximal degree in co-relation 6728. Up to 1925 conditions per place. [2024-06-28 03:34:44,919 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 65 selfloop transitions, 28 changer transitions 0/98 dead transitions. [2024-06-28 03:34:44,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 98 transitions, 627 flow [2024-06-28 03:34:44,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:34:44,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:34:44,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-28 03:34:44,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-28 03:34:44,921 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 235 flow. Second operand 6 states and 150 transitions. [2024-06-28 03:34:44,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 98 transitions, 627 flow [2024-06-28 03:34:44,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 619 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-28 03:34:44,924 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 414 flow [2024-06-28 03:34:44,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=414, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-06-28 03:34:44,925 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 17 predicate places. [2024-06-28 03:34:44,925 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 414 flow [2024-06-28 03:34:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:44,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:44,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:44,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:34:44,925 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:44,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash 343218841, now seen corresponding path program 1 times [2024-06-28 03:34:44,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:44,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388827615] [2024-06-28 03:34:44,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:44,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:45,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:45,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:45,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388827615] [2024-06-28 03:34:45,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388827615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:45,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:45,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:45,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262590375] [2024-06-28 03:34:45,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:45,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:45,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-06-28 03:34:45,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 414 flow. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:45,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:45,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-06-28 03:34:45,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:46,034 INFO L124 PetriNetUnfolderBase]: 1515/2326 cut-off events. [2024-06-28 03:34:46,034 INFO L125 PetriNetUnfolderBase]: For 5688/5688 co-relation queries the response was YES. [2024-06-28 03:34:46,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 2326 events. 1515/2326 cut-off events. For 5688/5688 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 11358 event pairs, 348 based on Foata normal form. 26/2351 useless extension candidates. Maximal degree in co-relation 8433. Up to 1889 conditions per place. [2024-06-28 03:34:46,046 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 73 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-06-28 03:34:46,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 108 transitions, 802 flow [2024-06-28 03:34:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:46,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-28 03:34:46,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-28 03:34:46,048 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 414 flow. Second operand 7 states and 171 transitions. [2024-06-28 03:34:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 108 transitions, 802 flow [2024-06-28 03:34:46,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 108 transitions, 786 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-28 03:34:46,054 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 480 flow [2024-06-28 03:34:46,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=480, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-06-28 03:34:46,055 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 23 predicate places. [2024-06-28 03:34:46,055 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 480 flow [2024-06-28 03:34:46,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 7 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:46,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:46,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:46,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:34:46,056 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)] === [2024-06-28 03:34:46,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:46,056 INFO L85 PathProgramCache]: Analyzing trace with hash -212618023, now seen corresponding path program 1 times [2024-06-28 03:34:46,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:46,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628848818] [2024-06-28 03:34:46,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:46,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:46,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:46,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628848818] [2024-06-28 03:34:46,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628848818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:46,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:46,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:34:46,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079587967] [2024-06-28 03:34:46,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:46,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:34:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:34:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:34:46,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:46,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 480 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) [2024-06-28 03:34:46,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:46,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:46,952 INFO L124 PetriNetUnfolderBase]: 1505/2322 cut-off events. [2024-06-28 03:34:46,952 INFO L125 PetriNetUnfolderBase]: For 7829/7829 co-relation queries the response was YES. [2024-06-28 03:34:46,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8893 conditions, 2322 events. 1505/2322 cut-off events. For 7829/7829 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11502 event pairs, 816 based on Foata normal form. 4/2323 useless extension candidates. Maximal degree in co-relation 8866. Up to 2254 conditions per place. [2024-06-28 03:34:46,970 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-28 03:34:46,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 74 transitions, 664 flow [2024-06-28 03:34:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:34:46,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:34:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:34:46,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42083333333333334 [2024-06-28 03:34:46,971 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 480 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:34:46,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 74 transitions, 664 flow [2024-06-28 03:34:46,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 74 transitions, 592 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 03:34:46,978 INFO L231 Difference]: Finished difference. Result has 66 places, 64 transitions, 465 flow [2024-06-28 03:34:46,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=66, PETRI_TRANSITIONS=64} [2024-06-28 03:34:46,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-28 03:34:46,980 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 64 transitions, 465 flow [2024-06-28 03:34:46,980 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) [2024-06-28 03:34:46,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:46,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:46,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:34:46,981 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)] === [2024-06-28 03:34:46,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:46,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1494142630, now seen corresponding path program 1 times [2024-06-28 03:34:46,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:46,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102353145] [2024-06-28 03:34:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:46,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:47,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:47,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102353145] [2024-06-28 03:34:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102353145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:47,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:47,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:47,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843436034] [2024-06-28 03:34:47,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:47,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:47,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:47,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:47,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:47,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:47,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 64 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:47,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:47,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:47,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:47,952 INFO L124 PetriNetUnfolderBase]: 1639/2523 cut-off events. [2024-06-28 03:34:47,953 INFO L125 PetriNetUnfolderBase]: For 8659/8671 co-relation queries the response was YES. [2024-06-28 03:34:47,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9846 conditions, 2523 events. 1639/2523 cut-off events. For 8659/8671 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12416 event pairs, 484 based on Foata normal form. 20/2542 useless extension candidates. Maximal degree in co-relation 9816. Up to 2285 conditions per place. [2024-06-28 03:34:47,970 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 79 selfloop transitions, 29 changer transitions 0/112 dead transitions. [2024-06-28 03:34:47,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 985 flow [2024-06-28 03:34:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-28 03:34:47,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48928571428571427 [2024-06-28 03:34:47,972 INFO L175 Difference]: Start difference. First operand has 66 places, 64 transitions, 465 flow. Second operand 7 states and 137 transitions. [2024-06-28 03:34:47,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 985 flow [2024-06-28 03:34:47,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 952 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-28 03:34:47,981 INFO L231 Difference]: Finished difference. Result has 71 places, 84 transitions, 711 flow [2024-06-28 03:34:47,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=711, PETRI_PLACES=71, PETRI_TRANSITIONS=84} [2024-06-28 03:34:47,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-06-28 03:34:47,983 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 84 transitions, 711 flow [2024-06-28 03:34:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:47,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:47,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:34:47,984 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)] === [2024-06-28 03:34:47,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1539923350, now seen corresponding path program 2 times [2024-06-28 03:34:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:47,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367145098] [2024-06-28 03:34:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:47,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:48,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367145098] [2024-06-28 03:34:48,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367145098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:48,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:48,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:48,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061832122] [2024-06-28 03:34:48,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:48,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:48,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:48,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 84 transitions, 711 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:48,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:48,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:48,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:49,067 INFO L124 PetriNetUnfolderBase]: 1659/2556 cut-off events. [2024-06-28 03:34:49,067 INFO L125 PetriNetUnfolderBase]: For 11133/11151 co-relation queries the response was YES. [2024-06-28 03:34:49,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10824 conditions, 2556 events. 1659/2556 cut-off events. For 11133/11151 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12651 event pairs, 495 based on Foata normal form. 30/2585 useless extension candidates. Maximal degree in co-relation 10792. Up to 2244 conditions per place. [2024-06-28 03:34:49,082 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 68 selfloop transitions, 40 changer transitions 0/112 dead transitions. [2024-06-28 03:34:49,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 1111 flow [2024-06-28 03:34:49,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:34:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:34:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-28 03:34:49,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 03:34:49,085 INFO L175 Difference]: Start difference. First operand has 71 places, 84 transitions, 711 flow. Second operand 6 states and 117 transitions. [2024-06-28 03:34:49,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 1111 flow [2024-06-28 03:34:49,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 1090 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-28 03:34:49,098 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 874 flow [2024-06-28 03:34:49,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=874, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2024-06-28 03:34:49,099 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-28 03:34:49,099 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 874 flow [2024-06-28 03:34:49,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:49,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:49,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:49,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:34:49,100 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)] === [2024-06-28 03:34:49,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:49,100 INFO L85 PathProgramCache]: Analyzing trace with hash -981061796, now seen corresponding path program 3 times [2024-06-28 03:34:49,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:49,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013682841] [2024-06-28 03:34:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:49,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:49,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013682841] [2024-06-28 03:34:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013682841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235119576] [2024-06-28 03:34:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:49,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:49,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:49,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:49,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 874 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:49,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:49,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:49,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:50,074 INFO L124 PetriNetUnfolderBase]: 1626/2509 cut-off events. [2024-06-28 03:34:50,074 INFO L125 PetriNetUnfolderBase]: For 13089/13089 co-relation queries the response was YES. [2024-06-28 03:34:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10968 conditions, 2509 events. 1626/2509 cut-off events. For 13089/13089 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12484 event pairs, 804 based on Foata normal form. 6/2513 useless extension candidates. Maximal degree in co-relation 10934. Up to 2411 conditions per place. [2024-06-28 03:34:50,091 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-06-28 03:34:50,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 107 transitions, 1139 flow [2024-06-28 03:34:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:34:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:34:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-28 03:34:50,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44583333333333336 [2024-06-28 03:34:50,093 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 874 flow. Second operand 6 states and 107 transitions. [2024-06-28 03:34:50,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 107 transitions, 1139 flow [2024-06-28 03:34:50,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 1074 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-28 03:34:50,113 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 850 flow [2024-06-28 03:34:50,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=850, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-28 03:34:50,114 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 37 predicate places. [2024-06-28 03:34:50,114 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 850 flow [2024-06-28 03:34:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:50,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:34:50,115 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)] === [2024-06-28 03:34:50,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash 669172600, now seen corresponding path program 1 times [2024-06-28 03:34:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241233186] [2024-06-28 03:34:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:50,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:51,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:51,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241233186] [2024-06-28 03:34:51,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241233186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:51,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:34:51,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530023667] [2024-06-28 03:34:51,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:51,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:34:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:34:51,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:34:51,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:34:51,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 850 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) [2024-06-28 03:34:51,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:51,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:34:51,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:52,001 INFO L124 PetriNetUnfolderBase]: 2003/3032 cut-off events. [2024-06-28 03:34:52,001 INFO L125 PetriNetUnfolderBase]: For 15273/15273 co-relation queries the response was YES. [2024-06-28 03:34:52,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12896 conditions, 3032 events. 2003/3032 cut-off events. For 15273/15273 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14415 event pairs, 1007 based on Foata normal form. 4/3036 useless extension candidates. Maximal degree in co-relation 12861. Up to 2948 conditions per place. [2024-06-28 03:34:52,017 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 16 changer transitions 0/114 dead transitions. [2024-06-28 03:34:52,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 114 transitions, 1179 flow [2024-06-28 03:34:52,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 03:34:52,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41785714285714287 [2024-06-28 03:34:52,020 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 850 flow. Second operand 7 states and 117 transitions. [2024-06-28 03:34:52,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 114 transitions, 1179 flow [2024-06-28 03:34:52,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 1087 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-28 03:34:52,039 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 858 flow [2024-06-28 03:34:52,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=858, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-28 03:34:52,041 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-28 03:34:52,041 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 858 flow [2024-06-28 03:34:52,041 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) [2024-06-28 03:34:52,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:52,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:52,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:34:52,042 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:34:52,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash 456194483, now seen corresponding path program 1 times [2024-06-28 03:34:52,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:52,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911881118] [2024-06-28 03:34:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:52,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:52,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:52,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:52,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911881118] [2024-06-28 03:34:52,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911881118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:52,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:52,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:52,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509497528] [2024-06-28 03:34:52,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:52,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:52,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:52,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:34:52,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 858 flow. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:52,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:52,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:34:52,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:53,179 INFO L124 PetriNetUnfolderBase]: 1994/3020 cut-off events. [2024-06-28 03:34:53,179 INFO L125 PetriNetUnfolderBase]: For 16028/16028 co-relation queries the response was YES. [2024-06-28 03:34:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13236 conditions, 3020 events. 1994/3020 cut-off events. For 16028/16028 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 14267 event pairs, 1019 based on Foata normal form. 3/3023 useless extension candidates. Maximal degree in co-relation 13200. Up to 2972 conditions per place. [2024-06-28 03:34:53,194 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 94 selfloop transitions, 10 changer transitions 0/107 dead transitions. [2024-06-28 03:34:53,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 1114 flow [2024-06-28 03:34:53,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:34:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:34:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-28 03:34:53,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-28 03:34:53,196 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 858 flow. Second operand 6 states and 93 transitions. [2024-06-28 03:34:53,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 1114 flow [2024-06-28 03:34:53,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 1071 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-28 03:34:53,212 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 871 flow [2024-06-28 03:34:53,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=871, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-28 03:34:53,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-06-28 03:34:53,213 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 871 flow [2024-06-28 03:34:53,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:53,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:53,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:53,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:34:53,214 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)] === [2024-06-28 03:34:53,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:53,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1546299235, now seen corresponding path program 1 times [2024-06-28 03:34:53,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:53,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014511352] [2024-06-28 03:34:53,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:53,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:53,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:53,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014511352] [2024-06-28 03:34:53,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014511352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:53,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:53,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:34:53,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794926203] [2024-06-28 03:34:53,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:53,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:34:53,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:53,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:34:53,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:34:54,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:54,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 871 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:54,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:54,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:54,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:54,643 INFO L124 PetriNetUnfolderBase]: 1886/2890 cut-off events. [2024-06-28 03:34:54,643 INFO L125 PetriNetUnfolderBase]: For 17207/17231 co-relation queries the response was YES. [2024-06-28 03:34:54,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13009 conditions, 2890 events. 1886/2890 cut-off events. For 17207/17231 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14306 event pairs, 557 based on Foata normal form. 28/2915 useless extension candidates. Maximal degree in co-relation 12972. Up to 2549 conditions per place. [2024-06-28 03:34:54,657 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 98 selfloop transitions, 44 changer transitions 0/147 dead transitions. [2024-06-28 03:34:54,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 147 transitions, 1420 flow [2024-06-28 03:34:54,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:34:54,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:34:54,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:34:54,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 03:34:54,659 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 871 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:34:54,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 147 transitions, 1420 flow [2024-06-28 03:34:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 147 transitions, 1386 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-28 03:34:54,674 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 1029 flow [2024-06-28 03:34:54,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1029, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-28 03:34:54,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-28 03:34:54,675 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 1029 flow [2024-06-28 03:34:54,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:54,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:54,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:54,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:34:54,676 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)] === [2024-06-28 03:34:54,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:54,676 INFO L85 PathProgramCache]: Analyzing trace with hash -186510633, now seen corresponding path program 2 times [2024-06-28 03:34:54,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:54,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845006309] [2024-06-28 03:34:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:54,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:55,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:55,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845006309] [2024-06-28 03:34:55,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845006309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:55,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:55,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:34:55,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822006240] [2024-06-28 03:34:55,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:55,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:34:55,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:55,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:34:55,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:34:55,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:55,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 1029 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-06-28 03:34:55,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:55,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:55,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:55,749 INFO L124 PetriNetUnfolderBase]: 2079/3189 cut-off events. [2024-06-28 03:34:55,750 INFO L125 PetriNetUnfolderBase]: For 22392/22420 co-relation queries the response was YES. [2024-06-28 03:34:55,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15325 conditions, 3189 events. 2079/3189 cut-off events. For 22392/22420 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16049 event pairs, 514 based on Foata normal form. 32/3219 useless extension candidates. Maximal degree in co-relation 15286. Up to 2538 conditions per place. [2024-06-28 03:34:55,771 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 83 selfloop transitions, 78 changer transitions 0/166 dead transitions. [2024-06-28 03:34:55,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 166 transitions, 1806 flow [2024-06-28 03:34:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-28 03:34:55,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-28 03:34:55,773 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 1029 flow. Second operand 7 states and 142 transitions. [2024-06-28 03:34:55,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 166 transitions, 1806 flow [2024-06-28 03:34:55,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 166 transitions, 1740 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:34:55,802 INFO L231 Difference]: Finished difference. Result has 92 places, 133 transitions, 1447 flow [2024-06-28 03:34:55,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1447, PETRI_PLACES=92, PETRI_TRANSITIONS=133} [2024-06-28 03:34:55,802 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-28 03:34:55,802 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 133 transitions, 1447 flow [2024-06-28 03:34:55,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 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) [2024-06-28 03:34:55,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:55,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:55,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:34:55,803 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)] === [2024-06-28 03:34:55,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1901170571, now seen corresponding path program 3 times [2024-06-28 03:34:55,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:55,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125612563] [2024-06-28 03:34:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:55,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:56,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:56,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125612563] [2024-06-28 03:34:56,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125612563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:56,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:56,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:34:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382457085] [2024-06-28 03:34:56,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:34:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:56,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:34:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:34:56,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:56,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 133 transitions, 1447 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:56,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:56,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:56,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:57,079 INFO L124 PetriNetUnfolderBase]: 2062/3158 cut-off events. [2024-06-28 03:34:57,079 INFO L125 PetriNetUnfolderBase]: For 26567/26597 co-relation queries the response was YES. [2024-06-28 03:34:57,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16493 conditions, 3158 events. 2062/3158 cut-off events. For 26567/26597 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15902 event pairs, 577 based on Foata normal form. 30/3183 useless extension candidates. Maximal degree in co-relation 16450. Up to 2537 conditions per place. [2024-06-28 03:34:57,100 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 79 selfloop transitions, 89 changer transitions 0/173 dead transitions. [2024-06-28 03:34:57,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 173 transitions, 2093 flow [2024-06-28 03:34:57,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-28 03:34:57,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:34:57,101 INFO L175 Difference]: Start difference. First operand has 92 places, 133 transitions, 1447 flow. Second operand 7 states and 140 transitions. [2024-06-28 03:34:57,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 173 transitions, 2093 flow [2024-06-28 03:34:57,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 173 transitions, 2042 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-28 03:34:57,132 INFO L231 Difference]: Finished difference. Result has 96 places, 142 transitions, 1703 flow [2024-06-28 03:34:57,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1703, PETRI_PLACES=96, PETRI_TRANSITIONS=142} [2024-06-28 03:34:57,133 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-28 03:34:57,133 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 142 transitions, 1703 flow [2024-06-28 03:34:57,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:57,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:57,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:34:57,134 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)] === [2024-06-28 03:34:57,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash 255700681, now seen corresponding path program 4 times [2024-06-28 03:34:57,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:57,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921253455] [2024-06-28 03:34:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:57,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:57,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921253455] [2024-06-28 03:34:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921253455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:57,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:57,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:34:57,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112184056] [2024-06-28 03:34:57,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:57,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:34:57,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:34:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:34:57,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:34:57,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 142 transitions, 1703 flow. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:57,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:57,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:34:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:34:58,419 INFO L124 PetriNetUnfolderBase]: 2115/3241 cut-off events. [2024-06-28 03:34:58,419 INFO L125 PetriNetUnfolderBase]: For 26841/26865 co-relation queries the response was YES. [2024-06-28 03:34:58,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17082 conditions, 3241 events. 2115/3241 cut-off events. For 26841/26865 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16378 event pairs, 524 based on Foata normal form. 32/3270 useless extension candidates. Maximal degree in co-relation 17038. Up to 2757 conditions per place. [2024-06-28 03:34:58,494 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 96 selfloop transitions, 71 changer transitions 0/172 dead transitions. [2024-06-28 03:34:58,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 172 transitions, 2213 flow [2024-06-28 03:34:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:34:58,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:34:58,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-28 03:34:58,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-28 03:34:58,511 INFO L175 Difference]: Start difference. First operand has 96 places, 142 transitions, 1703 flow. Second operand 7 states and 135 transitions. [2024-06-28 03:34:58,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 172 transitions, 2213 flow [2024-06-28 03:34:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 172 transitions, 2006 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-28 03:34:58,559 INFO L231 Difference]: Finished difference. Result has 99 places, 142 transitions, 1658 flow [2024-06-28 03:34:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1658, PETRI_PLACES=99, PETRI_TRANSITIONS=142} [2024-06-28 03:34:58,561 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2024-06-28 03:34:58,561 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 142 transitions, 1658 flow [2024-06-28 03:34:58,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:34:58,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:34:58,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:34:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:34:58,562 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)] === [2024-06-28 03:34:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:34:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash 471391601, now seen corresponding path program 1 times [2024-06-28 03:34:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:34:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82905421] [2024-06-28 03:34:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:34:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:34:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:34:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:34:59,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:34:59,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82905421] [2024-06-28 03:34:59,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82905421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:34:59,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:34:59,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:34:59,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94494378] [2024-06-28 03:34:59,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:34:59,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:34:59,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:34:59,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:34:59,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:34:59,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:34:59,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 142 transitions, 1658 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) [2024-06-28 03:34:59,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:34:59,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:34:59,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:00,091 INFO L124 PetriNetUnfolderBase]: 2337/3538 cut-off events. [2024-06-28 03:35:00,091 INFO L125 PetriNetUnfolderBase]: For 31072/31072 co-relation queries the response was YES. [2024-06-28 03:35:00,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18797 conditions, 3538 events. 2337/3538 cut-off events. For 31072/31072 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 17203 event pairs, 1075 based on Foata normal form. 3/3541 useless extension candidates. Maximal degree in co-relation 18752. Up to 3413 conditions per place. [2024-06-28 03:35:00,121 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 27 changer transitions 0/171 dead transitions. [2024-06-28 03:35:00,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 171 transitions, 2209 flow [2024-06-28 03:35:00,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:35:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:35:00,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:35:00,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:35:00,132 INFO L175 Difference]: Start difference. First operand has 99 places, 142 transitions, 1658 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:35:00,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 171 transitions, 2209 flow [2024-06-28 03:35:00,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 171 transitions, 2061 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:00,172 INFO L231 Difference]: Finished difference. Result has 101 places, 150 transitions, 1728 flow [2024-06-28 03:35:00,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1517, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1728, PETRI_PLACES=101, PETRI_TRANSITIONS=150} [2024-06-28 03:35:00,173 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-28 03:35:00,173 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 150 transitions, 1728 flow [2024-06-28 03:35:00,173 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) [2024-06-28 03:35:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:00,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:00,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:35:00,174 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:00,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1163697399, now seen corresponding path program 1 times [2024-06-28 03:35:00,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:00,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236780034] [2024-06-28 03:35:00,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:00,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:00,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:00,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236780034] [2024-06-28 03:35:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236780034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:00,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:00,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120429389] [2024-06-28 03:35:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:00,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:00,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:00,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:01,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:01,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 150 transitions, 1728 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:01,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:01,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:01,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:01,657 INFO L124 PetriNetUnfolderBase]: 2458/3806 cut-off events. [2024-06-28 03:35:01,657 INFO L125 PetriNetUnfolderBase]: For 37115/37153 co-relation queries the response was YES. [2024-06-28 03:35:01,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19719 conditions, 3806 events. 2458/3806 cut-off events. For 37115/37153 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 20481 event pairs, 578 based on Foata normal form. 54/3853 useless extension candidates. Maximal degree in co-relation 19673. Up to 2859 conditions per place. [2024-06-28 03:35:01,682 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 151 selfloop transitions, 50 changer transitions 0/206 dead transitions. [2024-06-28 03:35:01,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 206 transitions, 2495 flow [2024-06-28 03:35:01,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-28 03:35:01,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2024-06-28 03:35:01,684 INFO L175 Difference]: Start difference. First operand has 101 places, 150 transitions, 1728 flow. Second operand 9 states and 178 transitions. [2024-06-28 03:35:01,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 206 transitions, 2495 flow [2024-06-28 03:35:01,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 206 transitions, 2347 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-28 03:35:01,726 INFO L231 Difference]: Finished difference. Result has 104 places, 154 transitions, 1765 flow [2024-06-28 03:35:01,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1765, PETRI_PLACES=104, PETRI_TRANSITIONS=154} [2024-06-28 03:35:01,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-28 03:35:01,727 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 154 transitions, 1765 flow [2024-06-28 03:35:01,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:01,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:01,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:01,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:35:01,728 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)] === [2024-06-28 03:35:01,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash -976629053, now seen corresponding path program 2 times [2024-06-28 03:35:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648742303] [2024-06-28 03:35:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:01,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:02,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:02,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648742303] [2024-06-28 03:35:02,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648742303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:02,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:02,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:02,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99878703] [2024-06-28 03:35:02,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:02,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:02,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:02,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:02,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:02,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:02,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 154 transitions, 1765 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:02,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:02,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:02,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:03,311 INFO L124 PetriNetUnfolderBase]: 2540/3943 cut-off events. [2024-06-28 03:35:03,311 INFO L125 PetriNetUnfolderBase]: For 41933/41963 co-relation queries the response was YES. [2024-06-28 03:35:03,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20894 conditions, 3943 events. 2540/3943 cut-off events. For 41933/41963 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 21355 event pairs, 609 based on Foata normal form. 58/3996 useless extension candidates. Maximal degree in co-relation 20846. Up to 3345 conditions per place. [2024-06-28 03:35:03,332 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 149 selfloop transitions, 52 changer transitions 0/206 dead transitions. [2024-06-28 03:35:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 206 transitions, 2440 flow [2024-06-28 03:35:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:35:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:35:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:35:03,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4775 [2024-06-28 03:35:03,334 INFO L175 Difference]: Start difference. First operand has 104 places, 154 transitions, 1765 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:35:03,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 206 transitions, 2440 flow [2024-06-28 03:35:03,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 206 transitions, 2376 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:03,378 INFO L231 Difference]: Finished difference. Result has 109 places, 156 transitions, 1845 flow [2024-06-28 03:35:03,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1845, PETRI_PLACES=109, PETRI_TRANSITIONS=156} [2024-06-28 03:35:03,378 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-28 03:35:03,379 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 156 transitions, 1845 flow [2024-06-28 03:35:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:03,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:03,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:35:03,379 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)] === [2024-06-28 03:35:03,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1528806825, now seen corresponding path program 3 times [2024-06-28 03:35:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:03,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891839352] [2024-06-28 03:35:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:03,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:03,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891839352] [2024-06-28 03:35:03,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891839352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:03,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:03,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:03,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647854916] [2024-06-28 03:35:03,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:03,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:03,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:03,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:03,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 156 transitions, 1845 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:03,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:03,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:03,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:04,845 INFO L124 PetriNetUnfolderBase]: 3154/5019 cut-off events. [2024-06-28 03:35:04,846 INFO L125 PetriNetUnfolderBase]: For 56851/56886 co-relation queries the response was YES. [2024-06-28 03:35:04,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26723 conditions, 5019 events. 3154/5019 cut-off events. For 56851/56886 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29879 event pairs, 540 based on Foata normal form. 44/5057 useless extension candidates. Maximal degree in co-relation 26673. Up to 2411 conditions per place. [2024-06-28 03:35:04,884 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 109 selfloop transitions, 103 changer transitions 0/217 dead transitions. [2024-06-28 03:35:04,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 217 transitions, 2788 flow [2024-06-28 03:35:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-28 03:35:04,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-28 03:35:04,885 INFO L175 Difference]: Start difference. First operand has 109 places, 156 transitions, 1845 flow. Second operand 8 states and 167 transitions. [2024-06-28 03:35:04,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 217 transitions, 2788 flow [2024-06-28 03:35:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 217 transitions, 2665 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 03:35:04,978 INFO L231 Difference]: Finished difference. Result has 111 places, 168 transitions, 2170 flow [2024-06-28 03:35:04,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2170, PETRI_PLACES=111, PETRI_TRANSITIONS=168} [2024-06-28 03:35:04,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-28 03:35:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 168 transitions, 2170 flow [2024-06-28 03:35:04,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:04,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:04,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:04,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:35:04,979 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)] === [2024-06-28 03:35:04,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:04,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1496176631, now seen corresponding path program 4 times [2024-06-28 03:35:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5399529] [2024-06-28 03:35:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:04,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:05,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:05,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5399529] [2024-06-28 03:35:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5399529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:05,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:05,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:05,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143622587] [2024-06-28 03:35:05,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:05,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:05,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:05,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:05,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:05,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:05,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 168 transitions, 2170 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:05,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:05,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:05,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:06,614 INFO L124 PetriNetUnfolderBase]: 3602/5735 cut-off events. [2024-06-28 03:35:06,615 INFO L125 PetriNetUnfolderBase]: For 76403/76456 co-relation queries the response was YES. [2024-06-28 03:35:06,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31983 conditions, 5735 events. 3602/5735 cut-off events. For 76403/76456 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35236 event pairs, 996 based on Foata normal form. 74/5803 useless extension candidates. Maximal degree in co-relation 31930. Up to 3365 conditions per place. [2024-06-28 03:35:06,674 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 114 selfloop transitions, 109 changer transitions 0/228 dead transitions. [2024-06-28 03:35:06,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 228 transitions, 3195 flow [2024-06-28 03:35:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-28 03:35:06,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-28 03:35:06,676 INFO L175 Difference]: Start difference. First operand has 111 places, 168 transitions, 2170 flow. Second operand 8 states and 166 transitions. [2024-06-28 03:35:06,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 228 transitions, 3195 flow [2024-06-28 03:35:06,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 228 transitions, 3073 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-28 03:35:06,782 INFO L231 Difference]: Finished difference. Result has 116 places, 177 transitions, 2492 flow [2024-06-28 03:35:06,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2492, PETRI_PLACES=116, PETRI_TRANSITIONS=177} [2024-06-28 03:35:06,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-28 03:35:06,783 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 177 transitions, 2492 flow [2024-06-28 03:35:06,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:06,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:06,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:06,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:35:06,784 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)] === [2024-06-28 03:35:06,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1486861751, now seen corresponding path program 5 times [2024-06-28 03:35:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:06,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565290921] [2024-06-28 03:35:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565290921] [2024-06-28 03:35:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565290921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:07,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:07,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:07,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643165952] [2024-06-28 03:35:07,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:07,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:07,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:07,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 177 transitions, 2492 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:07,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:07,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:07,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:08,448 INFO L124 PetriNetUnfolderBase]: 3615/5768 cut-off events. [2024-06-28 03:35:08,449 INFO L125 PetriNetUnfolderBase]: For 84008/84065 co-relation queries the response was YES. [2024-06-28 03:35:08,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33363 conditions, 5768 events. 3615/5768 cut-off events. For 84008/84065 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35509 event pairs, 1075 based on Foata normal form. 84/5850 useless extension candidates. Maximal degree in co-relation 33308. Up to 4540 conditions per place. [2024-06-28 03:35:08,488 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 118 selfloop transitions, 99 changer transitions 0/222 dead transitions. [2024-06-28 03:35:08,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 222 transitions, 3284 flow [2024-06-28 03:35:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-28 03:35:08,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509375 [2024-06-28 03:35:08,490 INFO L175 Difference]: Start difference. First operand has 116 places, 177 transitions, 2492 flow. Second operand 8 states and 163 transitions. [2024-06-28 03:35:08,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 222 transitions, 3284 flow [2024-06-28 03:35:08,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 222 transitions, 3146 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:08,600 INFO L231 Difference]: Finished difference. Result has 119 places, 178 transitions, 2600 flow [2024-06-28 03:35:08,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2360, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=119, PETRI_TRANSITIONS=178} [2024-06-28 03:35:08,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-28 03:35:08,601 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 178 transitions, 2600 flow [2024-06-28 03:35:08,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:08,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:08,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:08,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:35:08,601 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:08,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1828578534, now seen corresponding path program 1 times [2024-06-28 03:35:08,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:08,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024242173] [2024-06-28 03:35:08,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:08,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:09,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:09,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:09,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024242173] [2024-06-28 03:35:09,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024242173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:09,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:09,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:35:09,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827658761] [2024-06-28 03:35:09,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:09,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:35:09,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:09,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:35:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:35:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:09,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 178 transitions, 2600 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) [2024-06-28 03:35:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:09,984 INFO L124 PetriNetUnfolderBase]: 4048/6363 cut-off events. [2024-06-28 03:35:09,984 INFO L125 PetriNetUnfolderBase]: For 85596/85596 co-relation queries the response was YES. [2024-06-28 03:35:10,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37168 conditions, 6363 events. 4048/6363 cut-off events. For 85596/85596 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37972 event pairs, 1895 based on Foata normal form. 3/6366 useless extension candidates. Maximal degree in co-relation 37112. Up to 6193 conditions per place. [2024-06-28 03:35:10,045 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 186 selfloop transitions, 21 changer transitions 0/210 dead transitions. [2024-06-28 03:35:10,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 210 transitions, 3208 flow [2024-06-28 03:35:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:35:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:35:10,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 03:35:10,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43214285714285716 [2024-06-28 03:35:10,047 INFO L175 Difference]: Start difference. First operand has 119 places, 178 transitions, 2600 flow. Second operand 7 states and 121 transitions. [2024-06-28 03:35:10,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 210 transitions, 3208 flow [2024-06-28 03:35:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 210 transitions, 3002 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:10,185 INFO L231 Difference]: Finished difference. Result has 122 places, 190 transitions, 2571 flow [2024-06-28 03:35:10,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2571, PETRI_PLACES=122, PETRI_TRANSITIONS=190} [2024-06-28 03:35:10,186 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-28 03:35:10,186 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 190 transitions, 2571 flow [2024-06-28 03:35:10,186 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) [2024-06-28 03:35:10,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:10,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:10,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:35:10,187 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)] === [2024-06-28 03:35:10,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1195933419, now seen corresponding path program 6 times [2024-06-28 03:35:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841055825] [2024-06-28 03:35:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:10,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841055825] [2024-06-28 03:35:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841055825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:11,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830930114] [2024-06-28 03:35:11,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:11,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:11,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:11,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:11,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 190 transitions, 2571 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:11,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:11,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:11,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:12,111 INFO L124 PetriNetUnfolderBase]: 4133/6606 cut-off events. [2024-06-28 03:35:12,111 INFO L125 PetriNetUnfolderBase]: For 98546/98591 co-relation queries the response was YES. [2024-06-28 03:35:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39030 conditions, 6606 events. 4133/6606 cut-off events. For 98546/98591 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 41831 event pairs, 1008 based on Foata normal form. 66/6666 useless extension candidates. Maximal degree in co-relation 38971. Up to 3390 conditions per place. [2024-06-28 03:35:12,155 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 132 selfloop transitions, 112 changer transitions 0/249 dead transitions. [2024-06-28 03:35:12,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 249 transitions, 3581 flow [2024-06-28 03:35:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-28 03:35:12,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:35:12,166 INFO L175 Difference]: Start difference. First operand has 122 places, 190 transitions, 2571 flow. Second operand 8 states and 160 transitions. [2024-06-28 03:35:12,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 249 transitions, 3581 flow [2024-06-28 03:35:12,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 249 transitions, 3557 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-28 03:35:12,284 INFO L231 Difference]: Finished difference. Result has 131 places, 204 transitions, 3156 flow [2024-06-28 03:35:12,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2547, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3156, PETRI_PLACES=131, PETRI_TRANSITIONS=204} [2024-06-28 03:35:12,284 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-28 03:35:12,285 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 204 transitions, 3156 flow [2024-06-28 03:35:12,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:12,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:12,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:35:12,285 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)] === [2024-06-28 03:35:12,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash -666009415, now seen corresponding path program 7 times [2024-06-28 03:35:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:12,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784329107] [2024-06-28 03:35:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:13,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:13,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784329107] [2024-06-28 03:35:13,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784329107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:13,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:13,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:13,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317483402] [2024-06-28 03:35:13,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:13,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:13,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:13,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:13,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:13,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 204 transitions, 3156 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:13,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:13,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:13,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:14,137 INFO L124 PetriNetUnfolderBase]: 4430/7100 cut-off events. [2024-06-28 03:35:14,137 INFO L125 PetriNetUnfolderBase]: For 123396/123471 co-relation queries the response was YES. [2024-06-28 03:35:14,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44167 conditions, 7100 events. 4430/7100 cut-off events. For 123396/123471 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 46152 event pairs, 1432 based on Foata normal form. 112/7207 useless extension candidates. Maximal degree in co-relation 44103. Up to 5689 conditions per place. [2024-06-28 03:35:14,196 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 133 selfloop transitions, 109 changer transitions 0/247 dead transitions. [2024-06-28 03:35:14,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 247 transitions, 4005 flow [2024-06-28 03:35:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-28 03:35:14,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.490625 [2024-06-28 03:35:14,198 INFO L175 Difference]: Start difference. First operand has 131 places, 204 transitions, 3156 flow. Second operand 8 states and 157 transitions. [2024-06-28 03:35:14,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 247 transitions, 4005 flow [2024-06-28 03:35:14,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 247 transitions, 3899 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 03:35:14,406 INFO L231 Difference]: Finished difference. Result has 135 places, 209 transitions, 3434 flow [2024-06-28 03:35:14,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3434, PETRI_PLACES=135, PETRI_TRANSITIONS=209} [2024-06-28 03:35:14,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-28 03:35:14,407 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 209 transitions, 3434 flow [2024-06-28 03:35:14,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:14,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:14,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:14,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:35:14,407 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)] === [2024-06-28 03:35:14,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:14,408 INFO L85 PathProgramCache]: Analyzing trace with hash -660751421, now seen corresponding path program 8 times [2024-06-28 03:35:14,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:14,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234610161] [2024-06-28 03:35:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:15,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:15,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234610161] [2024-06-28 03:35:15,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234610161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:15,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:15,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:15,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029569258] [2024-06-28 03:35:15,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:15,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:15,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:15,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:15,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:15,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-06-28 03:35:15,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 209 transitions, 3434 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:15,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:15,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-06-28 03:35:15,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:16,423 INFO L124 PetriNetUnfolderBase]: 4606/7418 cut-off events. [2024-06-28 03:35:16,423 INFO L125 PetriNetUnfolderBase]: For 126426/126456 co-relation queries the response was YES. [2024-06-28 03:35:16,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46102 conditions, 7418 events. 4606/7418 cut-off events. For 126426/126456 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 48931 event pairs, 1676 based on Foata normal form. 100/7511 useless extension candidates. Maximal degree in co-relation 46037. Up to 6141 conditions per place. [2024-06-28 03:35:16,473 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 172 selfloop transitions, 75 changer transitions 0/252 dead transitions. [2024-06-28 03:35:16,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 252 transitions, 4238 flow [2024-06-28 03:35:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-28 03:35:16,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-28 03:35:16,475 INFO L175 Difference]: Start difference. First operand has 135 places, 209 transitions, 3434 flow. Second operand 8 states and 153 transitions. [2024-06-28 03:35:16,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 252 transitions, 4238 flow [2024-06-28 03:35:16,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 252 transitions, 4011 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:16,667 INFO L231 Difference]: Finished difference. Result has 137 places, 214 transitions, 3518 flow [2024-06-28 03:35:16,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3518, PETRI_PLACES=137, PETRI_TRANSITIONS=214} [2024-06-28 03:35:16,674 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-28 03:35:16,674 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 214 transitions, 3518 flow [2024-06-28 03:35:16,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-28 03:35:16,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:16,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:16,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:35:16,675 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:16,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:16,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1544427110, now seen corresponding path program 2 times [2024-06-28 03:35:16,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:16,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510710355] [2024-06-28 03:35:16,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:16,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:17,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:17,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510710355] [2024-06-28 03:35:17,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510710355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:17,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:17,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:35:17,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719568248] [2024-06-28 03:35:17,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:17,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:35:17,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:17,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:35:17,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:35:17,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:17,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 214 transitions, 3518 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) [2024-06-28 03:35:17,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:17,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:17,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:18,376 INFO L124 PetriNetUnfolderBase]: 5149/8191 cut-off events. [2024-06-28 03:35:18,377 INFO L125 PetriNetUnfolderBase]: For 129252/129252 co-relation queries the response was YES. [2024-06-28 03:35:18,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50984 conditions, 8191 events. 5149/8191 cut-off events. For 129252/129252 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 52509 event pairs, 2597 based on Foata normal form. 3/8194 useless extension candidates. Maximal degree in co-relation 50918. Up to 7969 conditions per place. [2024-06-28 03:35:18,449 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 214 selfloop transitions, 28 changer transitions 0/245 dead transitions. [2024-06-28 03:35:18,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 245 transitions, 4273 flow [2024-06-28 03:35:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:35:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:35:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:35:18,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 03:35:18,450 INFO L175 Difference]: Start difference. First operand has 137 places, 214 transitions, 3518 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:35:18,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 245 transitions, 4273 flow [2024-06-28 03:35:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 245 transitions, 4107 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:18,738 INFO L231 Difference]: Finished difference. Result has 140 places, 229 transitions, 3631 flow [2024-06-28 03:35:18,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3356, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3631, PETRI_PLACES=140, PETRI_TRANSITIONS=229} [2024-06-28 03:35:18,739 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-28 03:35:18,740 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 229 transitions, 3631 flow [2024-06-28 03:35:18,740 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) [2024-06-28 03:35:18,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:18,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:18,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:35:18,740 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)] === [2024-06-28 03:35:18,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:18,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1477166531, now seen corresponding path program 1 times [2024-06-28 03:35:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:18,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123179280] [2024-06-28 03:35:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:18,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:19,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123179280] [2024-06-28 03:35:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123179280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:19,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:19,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:19,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398160119] [2024-06-28 03:35:19,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:19,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:19,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:19,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:19,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:19,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 229 transitions, 3631 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) [2024-06-28 03:35:19,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:19,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:19,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:21,231 INFO L124 PetriNetUnfolderBase]: 5199/8272 cut-off events. [2024-06-28 03:35:21,231 INFO L125 PetriNetUnfolderBase]: For 131866/131866 co-relation queries the response was YES. [2024-06-28 03:35:21,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51121 conditions, 8272 events. 5199/8272 cut-off events. For 131866/131866 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 53167 event pairs, 2593 based on Foata normal form. 10/8282 useless extension candidates. Maximal degree in co-relation 51053. Up to 7964 conditions per place. [2024-06-28 03:35:21,308 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 228 selfloop transitions, 36 changer transitions 0/267 dead transitions. [2024-06-28 03:35:21,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 267 transitions, 4494 flow [2024-06-28 03:35:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:21,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:35:21,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.421875 [2024-06-28 03:35:21,309 INFO L175 Difference]: Start difference. First operand has 140 places, 229 transitions, 3631 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:35:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 267 transitions, 4494 flow [2024-06-28 03:35:21,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 267 transitions, 4442 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-28 03:35:21,603 INFO L231 Difference]: Finished difference. Result has 146 places, 238 transitions, 3886 flow [2024-06-28 03:35:21,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3886, PETRI_PLACES=146, PETRI_TRANSITIONS=238} [2024-06-28 03:35:21,604 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-28 03:35:21,604 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 238 transitions, 3886 flow [2024-06-28 03:35:21,604 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) [2024-06-28 03:35:21,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:21,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:21,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:35:21,605 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)] === [2024-06-28 03:35:21,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:21,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1178782185, now seen corresponding path program 2 times [2024-06-28 03:35:21,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:21,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423384830] [2024-06-28 03:35:21,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:21,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:22,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:22,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423384830] [2024-06-28 03:35:22,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423384830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:22,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:22,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:22,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753683127] [2024-06-28 03:35:22,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:22,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:22,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:22,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:22,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:22,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:22,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 238 transitions, 3886 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) [2024-06-28 03:35:22,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:22,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:22,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:23,859 INFO L124 PetriNetUnfolderBase]: 5176/8237 cut-off events. [2024-06-28 03:35:23,860 INFO L125 PetriNetUnfolderBase]: For 138803/138803 co-relation queries the response was YES. [2024-06-28 03:35:23,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51833 conditions, 8237 events. 5176/8237 cut-off events. For 138803/138803 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52907 event pairs, 2597 based on Foata normal form. 10/8247 useless extension candidates. Maximal degree in co-relation 51763. Up to 7972 conditions per place. [2024-06-28 03:35:23,925 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 241 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-28 03:35:23,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 269 transitions, 4680 flow [2024-06-28 03:35:23,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:35:23,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 03:35:23,926 INFO L175 Difference]: Start difference. First operand has 146 places, 238 transitions, 3886 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:35:23,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 269 transitions, 4680 flow [2024-06-28 03:35:24,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 269 transitions, 4514 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:24,181 INFO L231 Difference]: Finished difference. Result has 149 places, 243 transitions, 3941 flow [2024-06-28 03:35:24,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3720, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3941, PETRI_PLACES=149, PETRI_TRANSITIONS=243} [2024-06-28 03:35:24,185 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-28 03:35:24,185 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 243 transitions, 3941 flow [2024-06-28 03:35:24,186 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) [2024-06-28 03:35:24,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:24,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:24,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:35:24,186 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:24,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1170211305, now seen corresponding path program 3 times [2024-06-28 03:35:24,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:24,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905300236] [2024-06-28 03:35:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:24,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:24,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905300236] [2024-06-28 03:35:24,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905300236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:24,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:24,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992064701] [2024-06-28 03:35:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:24,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:25,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:25,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 243 transitions, 3941 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) [2024-06-28 03:35:25,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:25,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:25,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:26,222 INFO L124 PetriNetUnfolderBase]: 5168/8208 cut-off events. [2024-06-28 03:35:26,222 INFO L125 PetriNetUnfolderBase]: For 143072/143072 co-relation queries the response was YES. [2024-06-28 03:35:26,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51828 conditions, 8208 events. 5168/8208 cut-off events. For 143072/143072 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 52351 event pairs, 2551 based on Foata normal form. 4/8212 useless extension candidates. Maximal degree in co-relation 51757. Up to 7982 conditions per place. [2024-06-28 03:35:26,295 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 248 selfloop transitions, 18 changer transitions 0/269 dead transitions. [2024-06-28 03:35:26,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 269 transitions, 4599 flow [2024-06-28 03:35:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:35:26,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-06-28 03:35:26,296 INFO L175 Difference]: Start difference. First operand has 149 places, 243 transitions, 3941 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:35:26,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 269 transitions, 4599 flow [2024-06-28 03:35:26,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 269 transitions, 4468 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:26,623 INFO L231 Difference]: Finished difference. Result has 152 places, 245 transitions, 3893 flow [2024-06-28 03:35:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3893, PETRI_PLACES=152, PETRI_TRANSITIONS=245} [2024-06-28 03:35:26,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-06-28 03:35:26,624 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 245 transitions, 3893 flow [2024-06-28 03:35:26,624 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) [2024-06-28 03:35:26,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:26,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:26,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:35:26,624 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)] === [2024-06-28 03:35:26,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:26,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1170507975, now seen corresponding path program 4 times [2024-06-28 03:35:26,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:26,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869886145] [2024-06-28 03:35:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:26,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:27,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:27,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:27,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869886145] [2024-06-28 03:35:27,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869886145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:27,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:27,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:27,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157341673] [2024-06-28 03:35:27,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:27,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:27,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:27,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:27,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:27,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:27,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 245 transitions, 3893 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) [2024-06-28 03:35:27,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:27,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:27,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:28,738 INFO L124 PetriNetUnfolderBase]: 5150/8202 cut-off events. [2024-06-28 03:35:28,739 INFO L125 PetriNetUnfolderBase]: For 147863/147863 co-relation queries the response was YES. [2024-06-28 03:35:28,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51519 conditions, 8202 events. 5150/8202 cut-off events. For 147863/147863 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 52682 event pairs, 2563 based on Foata normal form. 8/8210 useless extension candidates. Maximal degree in co-relation 51447. Up to 7879 conditions per place. [2024-06-28 03:35:28,812 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 236 selfloop transitions, 36 changer transitions 0/275 dead transitions. [2024-06-28 03:35:28,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 275 transitions, 4648 flow [2024-06-28 03:35:28,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:28,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:35:28,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415625 [2024-06-28 03:35:28,813 INFO L175 Difference]: Start difference. First operand has 152 places, 245 transitions, 3893 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:35:28,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 275 transitions, 4648 flow [2024-06-28 03:35:29,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 275 transitions, 4583 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:29,120 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 4024 flow [2024-06-28 03:35:29,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4024, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-28 03:35:29,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-28 03:35:29,120 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 4024 flow [2024-06-28 03:35:29,121 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) [2024-06-28 03:35:29,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:29,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:29,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:35:29,121 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)] === [2024-06-28 03:35:29,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -27598611, now seen corresponding path program 1 times [2024-06-28 03:35:29,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:29,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733592901] [2024-06-28 03:35:29,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:29,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:29,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733592901] [2024-06-28 03:35:29,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733592901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:29,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:29,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:35:29,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040086798] [2024-06-28 03:35:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:35:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:35:29,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:35:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:29,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 249 transitions, 4024 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:29,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:29,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:29,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:31,131 INFO L124 PetriNetUnfolderBase]: 5115/8112 cut-off events. [2024-06-28 03:35:31,132 INFO L125 PetriNetUnfolderBase]: For 151772/151784 co-relation queries the response was YES. [2024-06-28 03:35:31,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51564 conditions, 8112 events. 5115/8112 cut-off events. For 151772/151784 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 51778 event pairs, 1937 based on Foata normal form. 13/8125 useless extension candidates. Maximal degree in co-relation 51491. Up to 7515 conditions per place. [2024-06-28 03:35:31,190 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 75 changer transitions 0/275 dead transitions. [2024-06-28 03:35:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 275 transitions, 4693 flow [2024-06-28 03:35:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:35:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:35:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-28 03:35:31,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-06-28 03:35:31,192 INFO L175 Difference]: Start difference. First operand has 154 places, 249 transitions, 4024 flow. Second operand 6 states and 117 transitions. [2024-06-28 03:35:31,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 275 transitions, 4693 flow [2024-06-28 03:35:31,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 275 transitions, 4567 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:31,526 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 4079 flow [2024-06-28 03:35:31,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4079, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-28 03:35:31,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-28 03:35:31,527 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 4079 flow [2024-06-28 03:35:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:31,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:31,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:31,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:35:31,528 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:31,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -625740074, now seen corresponding path program 3 times [2024-06-28 03:35:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:31,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007107633] [2024-06-28 03:35:31,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:31,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:31,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007107633] [2024-06-28 03:35:31,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007107633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:31,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:31,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:35:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105552408] [2024-06-28 03:35:31,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:31,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:35:31,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:35:31,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:35:32,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:32,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 249 transitions, 4079 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) [2024-06-28 03:35:32,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:32,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:32,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:33,156 INFO L124 PetriNetUnfolderBase]: 5106/8122 cut-off events. [2024-06-28 03:35:33,156 INFO L125 PetriNetUnfolderBase]: For 160663/160663 co-relation queries the response was YES. [2024-06-28 03:35:33,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51819 conditions, 8122 events. 5106/8122 cut-off events. For 160663/160663 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 52012 event pairs, 2580 based on Foata normal form. 3/8125 useless extension candidates. Maximal degree in co-relation 51745. Up to 7935 conditions per place. [2024-06-28 03:35:33,227 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 242 selfloop transitions, 14 changer transitions 0/259 dead transitions. [2024-06-28 03:35:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 259 transitions, 4624 flow [2024-06-28 03:35:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:35:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:35:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-28 03:35:33,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-28 03:35:33,229 INFO L175 Difference]: Start difference. First operand has 154 places, 249 transitions, 4079 flow. Second operand 6 states and 96 transitions. [2024-06-28 03:35:33,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 259 transitions, 4624 flow [2024-06-28 03:35:33,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 259 transitions, 4444 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:33,569 INFO L231 Difference]: Finished difference. Result has 155 places, 249 transitions, 3935 flow [2024-06-28 03:35:33,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3935, PETRI_PLACES=155, PETRI_TRANSITIONS=249} [2024-06-28 03:35:33,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-28 03:35:33,569 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 249 transitions, 3935 flow [2024-06-28 03:35:33,570 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) [2024-06-28 03:35:33,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:33,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:33,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:35:33,570 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:33,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash -631448042, now seen corresponding path program 1 times [2024-06-28 03:35:33,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:33,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926788674] [2024-06-28 03:35:33,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:33,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:34,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926788674] [2024-06-28 03:35:34,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926788674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:34,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:34,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538515909] [2024-06-28 03:35:34,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:34,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:34,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:34,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:34,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 249 transitions, 3935 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:34,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:34,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:34,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:35,481 INFO L124 PetriNetUnfolderBase]: 5121/8145 cut-off events. [2024-06-28 03:35:35,482 INFO L125 PetriNetUnfolderBase]: For 163115/163115 co-relation queries the response was YES. [2024-06-28 03:35:35,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51734 conditions, 8145 events. 5121/8145 cut-off events. For 163115/163115 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52206 event pairs, 2568 based on Foata normal form. 3/8148 useless extension candidates. Maximal degree in co-relation 51659. Up to 7923 conditions per place. [2024-06-28 03:35:35,566 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 250 selfloop transitions, 19 changer transitions 0/272 dead transitions. [2024-06-28 03:35:35,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 272 transitions, 4639 flow [2024-06-28 03:35:35,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:35:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:35:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:35:35,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 03:35:35,568 INFO L175 Difference]: Start difference. First operand has 155 places, 249 transitions, 3935 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:35:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 272 transitions, 4639 flow [2024-06-28 03:35:36,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 272 transitions, 4603 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-28 03:35:36,014 INFO L231 Difference]: Finished difference. Result has 157 places, 255 transitions, 4001 flow [2024-06-28 03:35:36,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4001, PETRI_PLACES=157, PETRI_TRANSITIONS=255} [2024-06-28 03:35:36,015 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-28 03:35:36,015 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 255 transitions, 4001 flow [2024-06-28 03:35:36,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:36,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:36,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:36,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:35:36,015 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:36,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 347537848, now seen corresponding path program 2 times [2024-06-28 03:35:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:36,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252722764] [2024-06-28 03:35:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:36,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252722764] [2024-06-28 03:35:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252722764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:36,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:36,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:36,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172155808] [2024-06-28 03:35:36,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:36,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:36,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:36,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:36,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:36,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 255 transitions, 4001 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:36,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:36,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:36,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:38,013 INFO L124 PetriNetUnfolderBase]: 5112/8134 cut-off events. [2024-06-28 03:35:38,013 INFO L125 PetriNetUnfolderBase]: For 170320/170322 co-relation queries the response was YES. [2024-06-28 03:35:38,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52425 conditions, 8134 events. 5112/8134 cut-off events. For 170320/170322 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52153 event pairs, 2567 based on Foata normal form. 5/8139 useless extension candidates. Maximal degree in co-relation 52349. Up to 7916 conditions per place. [2024-06-28 03:35:38,072 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 19 changer transitions 0/267 dead transitions. [2024-06-28 03:35:38,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 267 transitions, 4571 flow [2024-06-28 03:35:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:35:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:35:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-28 03:35:38,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:35:38,074 INFO L175 Difference]: Start difference. First operand has 157 places, 255 transitions, 4001 flow. Second operand 6 states and 100 transitions. [2024-06-28 03:35:38,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 267 transitions, 4571 flow [2024-06-28 03:35:38,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 267 transitions, 4524 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-28 03:35:38,400 INFO L231 Difference]: Finished difference. Result has 161 places, 255 transitions, 3999 flow [2024-06-28 03:35:38,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3999, PETRI_PLACES=161, PETRI_TRANSITIONS=255} [2024-06-28 03:35:38,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-28 03:35:38,400 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 255 transitions, 3999 flow [2024-06-28 03:35:38,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:35:38,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:38,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:38,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:35:38,401 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:38,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:38,401 INFO L85 PathProgramCache]: Analyzing trace with hash -127687990, now seen corresponding path program 1 times [2024-06-28 03:35:38,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:38,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260751134] [2024-06-28 03:35:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:38,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:38,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260751134] [2024-06-28 03:35:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260751134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:38,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324857683] [2024-06-28 03:35:38,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:38,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:38,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 255 transitions, 3999 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) [2024-06-28 03:35:38,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:38,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:38,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:40,069 INFO L124 PetriNetUnfolderBase]: 5185/8213 cut-off events. [2024-06-28 03:35:40,069 INFO L125 PetriNetUnfolderBase]: For 178312/178337 co-relation queries the response was YES. [2024-06-28 03:35:40,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52925 conditions, 8213 events. 5185/8213 cut-off events. For 178312/178337 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 52446 event pairs, 2081 based on Foata normal form. 30/8243 useless extension candidates. Maximal degree in co-relation 52847. Up to 7797 conditions per place. [2024-06-28 03:35:40,148 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 267 selfloop transitions, 54 changer transitions 0/324 dead transitions. [2024-06-28 03:35:40,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 324 transitions, 5357 flow [2024-06-28 03:35:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:35:40,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-28 03:35:40,150 INFO L175 Difference]: Start difference. First operand has 161 places, 255 transitions, 3999 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:35:40,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 324 transitions, 5357 flow [2024-06-28 03:35:40,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 324 transitions, 5291 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:35:40,595 INFO L231 Difference]: Finished difference. Result has 167 places, 290 transitions, 4561 flow [2024-06-28 03:35:40,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4561, PETRI_PLACES=167, PETRI_TRANSITIONS=290} [2024-06-28 03:35:40,596 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-28 03:35:40,596 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 290 transitions, 4561 flow [2024-06-28 03:35:40,596 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) [2024-06-28 03:35:40,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:40,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:40,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:35:40,596 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:40,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:40,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2133729649, now seen corresponding path program 1 times [2024-06-28 03:35:40,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:40,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429441592] [2024-06-28 03:35:40,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:40,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:41,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:41,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429441592] [2024-06-28 03:35:41,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429441592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:41,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972782219] [2024-06-28 03:35:41,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:41,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:41,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:41,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:41,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:41,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 290 transitions, 4561 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:41,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:41,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:41,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:42,982 INFO L124 PetriNetUnfolderBase]: 5291/8374 cut-off events. [2024-06-28 03:35:42,982 INFO L125 PetriNetUnfolderBase]: For 191493/191519 co-relation queries the response was YES. [2024-06-28 03:35:43,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56256 conditions, 8374 events. 5291/8374 cut-off events. For 191493/191519 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 53408 event pairs, 1971 based on Foata normal form. 32/8406 useless extension candidates. Maximal degree in co-relation 56174. Up to 7712 conditions per place. [2024-06-28 03:35:43,087 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 260 selfloop transitions, 89 changer transitions 0/352 dead transitions. [2024-06-28 03:35:43,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 352 transitions, 5905 flow [2024-06-28 03:35:43,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:35:43,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 03:35:43,089 INFO L175 Difference]: Start difference. First operand has 167 places, 290 transitions, 4561 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:35:43,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 352 transitions, 5905 flow [2024-06-28 03:35:43,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 352 transitions, 5823 flow, removed 40 selfloop flow, removed 1 redundant places. [2024-06-28 03:35:43,623 INFO L231 Difference]: Finished difference. Result has 178 places, 313 transitions, 5196 flow [2024-06-28 03:35:43,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5196, PETRI_PLACES=178, PETRI_TRANSITIONS=313} [2024-06-28 03:35:43,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-28 03:35:43,624 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 313 transitions, 5196 flow [2024-06-28 03:35:43,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:43,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:43,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:43,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:35:43,625 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)] === [2024-06-28 03:35:43,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:43,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1956471729, now seen corresponding path program 2 times [2024-06-28 03:35:43,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:43,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5559233] [2024-06-28 03:35:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:44,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5559233] [2024-06-28 03:35:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5559233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:44,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:44,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207215111] [2024-06-28 03:35:44,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:44,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:44,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:44,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 313 transitions, 5196 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:44,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:44,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:46,015 INFO L124 PetriNetUnfolderBase]: 5368/8493 cut-off events. [2024-06-28 03:35:46,016 INFO L125 PetriNetUnfolderBase]: For 204280/204297 co-relation queries the response was YES. [2024-06-28 03:35:46,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58642 conditions, 8493 events. 5368/8493 cut-off events. For 204280/204297 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54306 event pairs, 2000 based on Foata normal form. 22/8515 useless extension candidates. Maximal degree in co-relation 58554. Up to 7800 conditions per place. [2024-06-28 03:35:46,107 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 258 selfloop transitions, 108 changer transitions 0/369 dead transitions. [2024-06-28 03:35:46,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 369 transitions, 6530 flow [2024-06-28 03:35:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:35:46,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:35:46,109 INFO L175 Difference]: Start difference. First operand has 178 places, 313 transitions, 5196 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:35:46,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 369 transitions, 6530 flow [2024-06-28 03:35:46,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 369 transitions, 6374 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:35:46,709 INFO L231 Difference]: Finished difference. Result has 186 places, 334 transitions, 5819 flow [2024-06-28 03:35:46,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5819, PETRI_PLACES=186, PETRI_TRANSITIONS=334} [2024-06-28 03:35:46,709 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 145 predicate places. [2024-06-28 03:35:46,709 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 334 transitions, 5819 flow [2024-06-28 03:35:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:46,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:46,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:46,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:35:46,710 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)] === [2024-06-28 03:35:46,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1950900099, now seen corresponding path program 3 times [2024-06-28 03:35:46,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:46,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367842874] [2024-06-28 03:35:46,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:46,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:47,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:47,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367842874] [2024-06-28 03:35:47,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367842874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:47,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:47,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:47,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504251427] [2024-06-28 03:35:47,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:47,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:47,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:47,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:47,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 334 transitions, 5819 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:47,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:47,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:47,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:48,990 INFO L124 PetriNetUnfolderBase]: 5420/8571 cut-off events. [2024-06-28 03:35:48,990 INFO L125 PetriNetUnfolderBase]: For 217549/217573 co-relation queries the response was YES. [2024-06-28 03:35:49,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60072 conditions, 8571 events. 5420/8571 cut-off events. For 217549/217573 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54839 event pairs, 1965 based on Foata normal form. 30/8601 useless extension candidates. Maximal degree in co-relation 59981. Up to 7714 conditions per place. [2024-06-28 03:35:49,077 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 264 selfloop transitions, 113 changer transitions 0/380 dead transitions. [2024-06-28 03:35:49,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 380 transitions, 7021 flow [2024-06-28 03:35:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:35:49,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:35:49,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:35:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-28 03:35:49,078 INFO L175 Difference]: Start difference. First operand has 186 places, 334 transitions, 5819 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:35:49,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 380 transitions, 7021 flow [2024-06-28 03:35:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 380 transitions, 6845 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-28 03:35:49,694 INFO L231 Difference]: Finished difference. Result has 192 places, 345 transitions, 6158 flow [2024-06-28 03:35:49,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5643, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6158, PETRI_PLACES=192, PETRI_TRANSITIONS=345} [2024-06-28 03:35:49,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 151 predicate places. [2024-06-28 03:35:49,695 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 345 transitions, 6158 flow [2024-06-28 03:35:49,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:49,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:49,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:35:49,696 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:49,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1411046122, now seen corresponding path program 2 times [2024-06-28 03:35:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:49,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688785003] [2024-06-28 03:35:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:50,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:50,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688785003] [2024-06-28 03:35:50,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688785003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:50,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:50,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:50,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826327875] [2024-06-28 03:35:50,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:50,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:50,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:50,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 345 transitions, 6158 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) [2024-06-28 03:35:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:51,729 INFO L124 PetriNetUnfolderBase]: 5576/8791 cut-off events. [2024-06-28 03:35:51,729 INFO L125 PetriNetUnfolderBase]: For 237996/238015 co-relation queries the response was YES. [2024-06-28 03:35:51,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62494 conditions, 8791 events. 5576/8791 cut-off events. For 237996/238015 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 56318 event pairs, 2145 based on Foata normal form. 24/8815 useless extension candidates. Maximal degree in co-relation 62401. Up to 8215 conditions per place. [2024-06-28 03:35:51,821 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 321 selfloop transitions, 82 changer transitions 0/406 dead transitions. [2024-06-28 03:35:51,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 406 transitions, 7694 flow [2024-06-28 03:35:51,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-28 03:35:51,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 03:35:51,823 INFO L175 Difference]: Start difference. First operand has 192 places, 345 transitions, 6158 flow. Second operand 8 states and 152 transitions. [2024-06-28 03:35:51,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 406 transitions, 7694 flow [2024-06-28 03:35:52,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 406 transitions, 7491 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:52,424 INFO L231 Difference]: Finished difference. Result has 198 places, 374 transitions, 6607 flow [2024-06-28 03:35:52,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5961, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6607, PETRI_PLACES=198, PETRI_TRANSITIONS=374} [2024-06-28 03:35:52,424 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 157 predicate places. [2024-06-28 03:35:52,425 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 374 transitions, 6607 flow [2024-06-28 03:35:52,425 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) [2024-06-28 03:35:52,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:52,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:52,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:35:52,425 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:52,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:52,426 INFO L85 PathProgramCache]: Analyzing trace with hash -819963232, now seen corresponding path program 3 times [2024-06-28 03:35:52,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:52,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672626706] [2024-06-28 03:35:52,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:52,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:52,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:52,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672626706] [2024-06-28 03:35:52,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672626706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:52,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:52,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:35:52,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40530324] [2024-06-28 03:35:52,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:52,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:35:52,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:52,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:35:52,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:35:52,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:52,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 374 transitions, 6607 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) [2024-06-28 03:35:52,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:52,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:52,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:54,529 INFO L124 PetriNetUnfolderBase]: 5564/8778 cut-off events. [2024-06-28 03:35:54,530 INFO L125 PetriNetUnfolderBase]: For 245959/245985 co-relation queries the response was YES. [2024-06-28 03:35:54,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63648 conditions, 8778 events. 5564/8778 cut-off events. For 245959/245985 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 56217 event pairs, 2132 based on Foata normal form. 32/8810 useless extension candidates. Maximal degree in co-relation 63550. Up to 8211 conditions per place. [2024-06-28 03:35:54,627 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 319 selfloop transitions, 78 changer transitions 0/400 dead transitions. [2024-06-28 03:35:54,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 400 transitions, 7689 flow [2024-06-28 03:35:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:54,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:35:54,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:35:54,629 INFO L175 Difference]: Start difference. First operand has 198 places, 374 transitions, 6607 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:35:54,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 400 transitions, 7689 flow [2024-06-28 03:35:55,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 400 transitions, 7569 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-28 03:35:55,316 INFO L231 Difference]: Finished difference. Result has 205 places, 375 transitions, 6707 flow [2024-06-28 03:35:55,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6707, PETRI_PLACES=205, PETRI_TRANSITIONS=375} [2024-06-28 03:35:55,321 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-28 03:35:55,322 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 375 transitions, 6707 flow [2024-06-28 03:35:55,322 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) [2024-06-28 03:35:55,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:55,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:55,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:35:55,322 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:55,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:55,323 INFO L85 PathProgramCache]: Analyzing trace with hash 276320115, now seen corresponding path program 4 times [2024-06-28 03:35:55,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:55,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393361030] [2024-06-28 03:35:55,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:55,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:56,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:56,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393361030] [2024-06-28 03:35:56,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393361030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:56,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:56,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:56,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65457553] [2024-06-28 03:35:56,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:56,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:56,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:56,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:56,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:56,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:56,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 375 transitions, 6707 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:56,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:56,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:35:57,696 INFO L124 PetriNetUnfolderBase]: 5721/9028 cut-off events. [2024-06-28 03:35:57,696 INFO L125 PetriNetUnfolderBase]: For 263432/263458 co-relation queries the response was YES. [2024-06-28 03:35:57,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66650 conditions, 9028 events. 5721/9028 cut-off events. For 263432/263458 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 58163 event pairs, 2045 based on Foata normal form. 36/9064 useless extension candidates. Maximal degree in co-relation 66549. Up to 8209 conditions per place. [2024-06-28 03:35:57,794 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 304 selfloop transitions, 138 changer transitions 0/445 dead transitions. [2024-06-28 03:35:57,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 445 transitions, 8652 flow [2024-06-28 03:35:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:35:57,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:35:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:35:57,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 03:35:57,795 INFO L175 Difference]: Start difference. First operand has 205 places, 375 transitions, 6707 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:35:57,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 445 transitions, 8652 flow [2024-06-28 03:35:58,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 445 transitions, 8456 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-28 03:35:58,452 INFO L231 Difference]: Finished difference. Result has 209 places, 411 transitions, 7732 flow [2024-06-28 03:35:58,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7732, PETRI_PLACES=209, PETRI_TRANSITIONS=411} [2024-06-28 03:35:58,453 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-28 03:35:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 411 transitions, 7732 flow [2024-06-28 03:35:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:58,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:35:58,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:35:58,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:35:58,453 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:35:58,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:35:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 276327555, now seen corresponding path program 5 times [2024-06-28 03:35:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:35:58,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538771979] [2024-06-28 03:35:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:35:58,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:35:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:35:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:35:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:35:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538771979] [2024-06-28 03:35:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538771979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:35:59,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:35:59,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:35:59,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224748044] [2024-06-28 03:35:59,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:35:59,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:35:59,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:35:59,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:35:59,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:35:59,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:35:59,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 411 transitions, 7732 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:35:59,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:35:59,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:35:59,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:00,850 INFO L124 PetriNetUnfolderBase]: 5844/9213 cut-off events. [2024-06-28 03:36:00,850 INFO L125 PetriNetUnfolderBase]: For 290180/290206 co-relation queries the response was YES. [2024-06-28 03:36:00,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69580 conditions, 9213 events. 5844/9213 cut-off events. For 290180/290206 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59514 event pairs, 1987 based on Foata normal form. 36/9249 useless extension candidates. Maximal degree in co-relation 69478. Up to 7947 conditions per place. [2024-06-28 03:36:00,955 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 289 selfloop transitions, 166 changer transitions 0/458 dead transitions. [2024-06-28 03:36:00,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 458 transitions, 9362 flow [2024-06-28 03:36:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:36:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:36:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:36:00,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-06-28 03:36:00,957 INFO L175 Difference]: Start difference. First operand has 209 places, 411 transitions, 7732 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:36:00,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 458 transitions, 9362 flow [2024-06-28 03:36:01,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 458 transitions, 9090 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-28 03:36:01,693 INFO L231 Difference]: Finished difference. Result has 214 places, 425 transitions, 8317 flow [2024-06-28 03:36:01,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7460, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8317, PETRI_PLACES=214, PETRI_TRANSITIONS=425} [2024-06-28 03:36:01,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-28 03:36:01,694 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 425 transitions, 8317 flow [2024-06-28 03:36:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:01,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:01,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:01,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:36:01,697 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:01,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:01,697 INFO L85 PathProgramCache]: Analyzing trace with hash 270755925, now seen corresponding path program 6 times [2024-06-28 03:36:01,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:01,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981970157] [2024-06-28 03:36:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:01,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:02,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:02,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981970157] [2024-06-28 03:36:02,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981970157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:02,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:02,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882641561] [2024-06-28 03:36:02,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:02,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:02,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:02,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:02,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:02,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 425 transitions, 8317 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:02,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:02,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:02,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:04,156 INFO L124 PetriNetUnfolderBase]: 5816/9164 cut-off events. [2024-06-28 03:36:04,156 INFO L125 PetriNetUnfolderBase]: For 299457/299478 co-relation queries the response was YES. [2024-06-28 03:36:04,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69816 conditions, 9164 events. 5816/9164 cut-off events. For 299457/299478 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 59003 event pairs, 2050 based on Foata normal form. 32/9196 useless extension candidates. Maximal degree in co-relation 69713. Up to 8354 conditions per place. [2024-06-28 03:36:04,260 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 309 selfloop transitions, 151 changer transitions 0/463 dead transitions. [2024-06-28 03:36:04,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 463 transitions, 9478 flow [2024-06-28 03:36:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:36:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:36:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:36:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-28 03:36:04,261 INFO L175 Difference]: Start difference. First operand has 214 places, 425 transitions, 8317 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:36:04,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 463 transitions, 9478 flow [2024-06-28 03:36:05,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 463 transitions, 9102 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-28 03:36:05,145 INFO L231 Difference]: Finished difference. Result has 218 places, 427 transitions, 8299 flow [2024-06-28 03:36:05,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7949, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8299, PETRI_PLACES=218, PETRI_TRANSITIONS=427} [2024-06-28 03:36:05,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-28 03:36:05,146 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 427 transitions, 8299 flow [2024-06-28 03:36:05,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:05,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:05,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:05,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:36:05,146 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:05,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:05,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1722333220, now seen corresponding path program 4 times [2024-06-28 03:36:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:05,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092436973] [2024-06-28 03:36:05,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:05,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:05,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:05,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092436973] [2024-06-28 03:36:05,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092436973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:05,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:05,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316793783] [2024-06-28 03:36:05,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:05,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:05,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:05,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:05,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:05,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:05,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 427 transitions, 8299 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:05,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:05,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:05,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:07,353 INFO L124 PetriNetUnfolderBase]: 5910/9297 cut-off events. [2024-06-28 03:36:07,354 INFO L125 PetriNetUnfolderBase]: For 305108/305129 co-relation queries the response was YES. [2024-06-28 03:36:07,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 9297 events. 5910/9297 cut-off events. For 305108/305129 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 59934 event pairs, 2212 based on Foata normal form. 26/9323 useless extension candidates. Maximal degree in co-relation 70919. Up to 8622 conditions per place. [2024-06-28 03:36:07,470 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 358 selfloop transitions, 108 changer transitions 0/469 dead transitions. [2024-06-28 03:36:07,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 469 transitions, 9754 flow [2024-06-28 03:36:07,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:07,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-28 03:36:07,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2024-06-28 03:36:07,471 INFO L175 Difference]: Start difference. First operand has 218 places, 427 transitions, 8299 flow. Second operand 7 states and 134 transitions. [2024-06-28 03:36:07,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 469 transitions, 9754 flow [2024-06-28 03:36:08,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 469 transitions, 9429 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:08,356 INFO L231 Difference]: Finished difference. Result has 222 places, 443 transitions, 8610 flow [2024-06-28 03:36:08,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7976, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8610, PETRI_PLACES=222, PETRI_TRANSITIONS=443} [2024-06-28 03:36:08,357 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-28 03:36:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 443 transitions, 8610 flow [2024-06-28 03:36:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:08,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:08,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:08,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:36:08,358 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:08,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1722631750, now seen corresponding path program 5 times [2024-06-28 03:36:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:08,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389165882] [2024-06-28 03:36:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389165882] [2024-06-28 03:36:08,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389165882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:08,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:08,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:36:08,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655680743] [2024-06-28 03:36:08,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:08,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:36:08,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:36:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:36:08,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:08,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 443 transitions, 8610 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) [2024-06-28 03:36:08,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:08,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:08,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:10,531 INFO L124 PetriNetUnfolderBase]: 5994/9417 cut-off events. [2024-06-28 03:36:10,531 INFO L125 PetriNetUnfolderBase]: For 326054/326080 co-relation queries the response was YES. [2024-06-28 03:36:10,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73461 conditions, 9417 events. 5994/9417 cut-off events. For 326054/326080 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 60650 event pairs, 2221 based on Foata normal form. 32/9449 useless extension candidates. Maximal degree in co-relation 73353. Up to 8684 conditions per place. [2024-06-28 03:36:10,638 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 373 selfloop transitions, 105 changer transitions 0/481 dead transitions. [2024-06-28 03:36:10,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 481 transitions, 10104 flow [2024-06-28 03:36:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:36:10,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:36:10,639 INFO L175 Difference]: Start difference. First operand has 222 places, 443 transitions, 8610 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:36:10,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 481 transitions, 10104 flow [2024-06-28 03:36:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 481 transitions, 9966 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-28 03:36:11,640 INFO L231 Difference]: Finished difference. Result has 227 places, 457 transitions, 9050 flow [2024-06-28 03:36:11,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8498, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9050, PETRI_PLACES=227, PETRI_TRANSITIONS=457} [2024-06-28 03:36:11,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 186 predicate places. [2024-06-28 03:36:11,642 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 457 transitions, 9050 flow [2024-06-28 03:36:11,643 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) [2024-06-28 03:36:11,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:11,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:36:11,643 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)] === [2024-06-28 03:36:11,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 985634373, now seen corresponding path program 7 times [2024-06-28 03:36:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873610619] [2024-06-28 03:36:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:11,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:12,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873610619] [2024-06-28 03:36:12,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873610619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:12,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:12,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:12,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959179650] [2024-06-28 03:36:12,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:12,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:12,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:12,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:12,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:12,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:12,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 457 transitions, 9050 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:12,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:12,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:12,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:14,485 INFO L124 PetriNetUnfolderBase]: 6044/9490 cut-off events. [2024-06-28 03:36:14,485 INFO L125 PetriNetUnfolderBase]: For 319384/319405 co-relation queries the response was YES. [2024-06-28 03:36:14,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73777 conditions, 9490 events. 6044/9490 cut-off events. For 319384/319405 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 61219 event pairs, 2086 based on Foata normal form. 30/9520 useless extension candidates. Maximal degree in co-relation 73667. Up to 8552 conditions per place. [2024-06-28 03:36:14,632 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 326 selfloop transitions, 161 changer transitions 0/490 dead transitions. [2024-06-28 03:36:14,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 490 transitions, 10346 flow [2024-06-28 03:36:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:14,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:36:14,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-28 03:36:14,633 INFO L175 Difference]: Start difference. First operand has 227 places, 457 transitions, 9050 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:36:14,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 490 transitions, 10346 flow [2024-06-28 03:36:15,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 490 transitions, 10183 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-28 03:36:15,637 INFO L231 Difference]: Finished difference. Result has 230 places, 462 transitions, 9441 flow [2024-06-28 03:36:15,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8887, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9441, PETRI_PLACES=230, PETRI_TRANSITIONS=462} [2024-06-28 03:36:15,638 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-28 03:36:15,638 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 462 transitions, 9441 flow [2024-06-28 03:36:15,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:15,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:15,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:15,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:36:15,638 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)] === [2024-06-28 03:36:15,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:15,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1714251329, now seen corresponding path program 8 times [2024-06-28 03:36:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692604630] [2024-06-28 03:36:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:15,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:15,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:16,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:16,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692604630] [2024-06-28 03:36:16,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692604630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:16,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:16,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953622359] [2024-06-28 03:36:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:16,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:16,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:16,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:16,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 462 transitions, 9441 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:16,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:16,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:18,488 INFO L124 PetriNetUnfolderBase]: 6021/9462 cut-off events. [2024-06-28 03:36:18,489 INFO L125 PetriNetUnfolderBase]: For 321937/321963 co-relation queries the response was YES. [2024-06-28 03:36:18,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73767 conditions, 9462 events. 6021/9462 cut-off events. For 321937/321963 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61086 event pairs, 2030 based on Foata normal form. 36/9498 useless extension candidates. Maximal degree in co-relation 73657. Up to 8059 conditions per place. [2024-06-28 03:36:18,783 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 311 selfloop transitions, 176 changer transitions 0/490 dead transitions. [2024-06-28 03:36:18,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 490 transitions, 10694 flow [2024-06-28 03:36:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-28 03:36:18,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:36:18,784 INFO L175 Difference]: Start difference. First operand has 230 places, 462 transitions, 9441 flow. Second operand 7 states and 126 transitions. [2024-06-28 03:36:18,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 490 transitions, 10694 flow [2024-06-28 03:36:19,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 490 transitions, 10313 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:19,905 INFO L231 Difference]: Finished difference. Result has 232 places, 467 transitions, 9634 flow [2024-06-28 03:36:19,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9060, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9634, PETRI_PLACES=232, PETRI_TRANSITIONS=467} [2024-06-28 03:36:19,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-28 03:36:19,906 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 467 transitions, 9634 flow [2024-06-28 03:36:19,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:19,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:19,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:19,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:36:19,907 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:19,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1979948609, now seen corresponding path program 9 times [2024-06-28 03:36:19,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:19,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003972447] [2024-06-28 03:36:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:19,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:20,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:20,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003972447] [2024-06-28 03:36:20,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003972447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:20,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:20,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163496649] [2024-06-28 03:36:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:20,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:20,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:20,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 467 transitions, 9634 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:20,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:20,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:20,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:22,628 INFO L124 PetriNetUnfolderBase]: 6013/9432 cut-off events. [2024-06-28 03:36:22,628 INFO L125 PetriNetUnfolderBase]: For 326563/326565 co-relation queries the response was YES. [2024-06-28 03:36:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74123 conditions, 9432 events. 6013/9432 cut-off events. For 326563/326565 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 60367 event pairs, 2620 based on Foata normal form. 4/9436 useless extension candidates. Maximal degree in co-relation 74012. Up to 9180 conditions per place. [2024-06-28 03:36:22,747 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 469 selfloop transitions, 18 changer transitions 0/490 dead transitions. [2024-06-28 03:36:22,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 490 transitions, 10734 flow [2024-06-28 03:36:22,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:36:22,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 03:36:22,748 INFO L175 Difference]: Start difference. First operand has 232 places, 467 transitions, 9634 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:36:22,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 490 transitions, 10734 flow [2024-06-28 03:36:23,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 490 transitions, 10258 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-28 03:36:23,842 INFO L231 Difference]: Finished difference. Result has 233 places, 469 transitions, 9247 flow [2024-06-28 03:36:23,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9158, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9247, PETRI_PLACES=233, PETRI_TRANSITIONS=469} [2024-06-28 03:36:23,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-28 03:36:23,843 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 469 transitions, 9247 flow [2024-06-28 03:36:23,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:23,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:23,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:23,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:36:23,844 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)] === [2024-06-28 03:36:23,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1970744399, now seen corresponding path program 10 times [2024-06-28 03:36:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519351787] [2024-06-28 03:36:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:23,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:24,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519351787] [2024-06-28 03:36:24,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519351787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:24,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:24,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:24,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212060954] [2024-06-28 03:36:24,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:24,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:24,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:24,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:24,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:24,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:24,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 469 transitions, 9247 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:24,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:24,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:24,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:26,685 INFO L124 PetriNetUnfolderBase]: 6052/9508 cut-off events. [2024-06-28 03:36:26,686 INFO L125 PetriNetUnfolderBase]: For 321543/321564 co-relation queries the response was YES. [2024-06-28 03:36:26,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73462 conditions, 9508 events. 6052/9508 cut-off events. For 321543/321564 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 61412 event pairs, 2034 based on Foata normal form. 26/9534 useless extension candidates. Maximal degree in co-relation 73351. Up to 8499 conditions per place. [2024-06-28 03:36:26,823 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 323 selfloop transitions, 177 changer transitions 0/503 dead transitions. [2024-06-28 03:36:26,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 503 transitions, 10518 flow [2024-06-28 03:36:26,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-28 03:36:26,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2024-06-28 03:36:26,825 INFO L175 Difference]: Start difference. First operand has 233 places, 469 transitions, 9247 flow. Second operand 7 states and 132 transitions. [2024-06-28 03:36:26,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 503 transitions, 10518 flow [2024-06-28 03:36:27,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 503 transitions, 10447 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:27,937 INFO L231 Difference]: Finished difference. Result has 235 places, 473 transitions, 9695 flow [2024-06-28 03:36:27,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9176, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9695, PETRI_PLACES=235, PETRI_TRANSITIONS=473} [2024-06-28 03:36:27,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-28 03:36:27,938 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 473 transitions, 9695 flow [2024-06-28 03:36:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:27,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:27,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:27,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:36:27,939 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)] === [2024-06-28 03:36:27,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1970751839, now seen corresponding path program 11 times [2024-06-28 03:36:27,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:27,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684055256] [2024-06-28 03:36:27,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:27,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:28,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684055256] [2024-06-28 03:36:28,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684055256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:28,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:28,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:36:28,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910186914] [2024-06-28 03:36:28,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:28,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:36:28,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:28,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:36:28,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:36:28,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:28,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 473 transitions, 9695 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:28,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:28,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:28,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:30,862 INFO L124 PetriNetUnfolderBase]: 6034/9491 cut-off events. [2024-06-28 03:36:30,862 INFO L125 PetriNetUnfolderBase]: For 336949/336951 co-relation queries the response was YES. [2024-06-28 03:36:30,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74316 conditions, 9491 events. 6034/9491 cut-off events. For 336949/336951 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 61403 event pairs, 2575 based on Foata normal form. 10/9501 useless extension candidates. Maximal degree in co-relation 74204. Up to 8900 conditions per place. [2024-06-28 03:36:30,988 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 428 selfloop transitions, 74 changer transitions 0/505 dead transitions. [2024-06-28 03:36:30,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 505 transitions, 10958 flow [2024-06-28 03:36:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:36:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:36:30,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 03:36:30,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-28 03:36:30,990 INFO L175 Difference]: Start difference. First operand has 235 places, 473 transitions, 9695 flow. Second operand 9 states and 145 transitions. [2024-06-28 03:36:30,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 505 transitions, 10958 flow [2024-06-28 03:36:32,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 505 transitions, 10587 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:32,361 INFO L231 Difference]: Finished difference. Result has 239 places, 477 transitions, 9611 flow [2024-06-28 03:36:32,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9324, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9611, PETRI_PLACES=239, PETRI_TRANSITIONS=477} [2024-06-28 03:36:32,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-28 03:36:32,362 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 477 transitions, 9611 flow [2024-06-28 03:36:32,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 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) [2024-06-28 03:36:32,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:32,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:36:32,363 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:32,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1661075172, now seen corresponding path program 6 times [2024-06-28 03:36:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:32,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460105645] [2024-06-28 03:36:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:32,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:32,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460105645] [2024-06-28 03:36:32,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460105645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:32,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:32,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:36:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939799143] [2024-06-28 03:36:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:36:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:36:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:36:32,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:32,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 477 transitions, 9611 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) [2024-06-28 03:36:32,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:32,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:32,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:34,646 INFO L124 PetriNetUnfolderBase]: 6022/9472 cut-off events. [2024-06-28 03:36:34,647 INFO L125 PetriNetUnfolderBase]: For 336156/336158 co-relation queries the response was YES. [2024-06-28 03:36:34,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73782 conditions, 9472 events. 6022/9472 cut-off events. For 336156/336158 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61161 event pairs, 2656 based on Foata normal form. 8/9480 useless extension candidates. Maximal degree in co-relation 73669. Up to 9193 conditions per place. [2024-06-28 03:36:34,775 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 457 selfloop transitions, 32 changer transitions 0/492 dead transitions. [2024-06-28 03:36:34,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 492 transitions, 10740 flow [2024-06-28 03:36:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:34,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:36:34,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:36:34,777 INFO L175 Difference]: Start difference. First operand has 239 places, 477 transitions, 9611 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:36:34,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 492 transitions, 10740 flow [2024-06-28 03:36:36,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 492 transitions, 10416 flow, removed 83 selfloop flow, removed 7 redundant places. [2024-06-28 03:36:36,255 INFO L231 Difference]: Finished difference. Result has 239 places, 477 transitions, 9364 flow [2024-06-28 03:36:36,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9287, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9364, PETRI_PLACES=239, PETRI_TRANSITIONS=477} [2024-06-28 03:36:36,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-28 03:36:36,256 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 477 transitions, 9364 flow [2024-06-28 03:36:36,256 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) [2024-06-28 03:36:36,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:36,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:36,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:36:36,257 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:36,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash 719096214, now seen corresponding path program 1 times [2024-06-28 03:36:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:36,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545550802] [2024-06-28 03:36:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:36,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:36,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545550802] [2024-06-28 03:36:36,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545550802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:36,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:36,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:36:36,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090014753] [2024-06-28 03:36:36,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:36:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:36:36,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:36:36,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:36,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 477 transitions, 9364 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) [2024-06-28 03:36:36,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:36,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:36,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:38,813 INFO L124 PetriNetUnfolderBase]: 6016/9462 cut-off events. [2024-06-28 03:36:38,813 INFO L125 PetriNetUnfolderBase]: For 337761/337761 co-relation queries the response was YES. [2024-06-28 03:36:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72738 conditions, 9462 events. 6016/9462 cut-off events. For 337761/337761 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 61126 event pairs, 2646 based on Foata normal form. 2/9464 useless extension candidates. Maximal degree in co-relation 72626. Up to 9266 conditions per place. [2024-06-28 03:36:38,914 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 473 selfloop transitions, 15 changer transitions 0/491 dead transitions. [2024-06-28 03:36:38,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 491 transitions, 10442 flow [2024-06-28 03:36:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:38,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-28 03:36:38,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-06-28 03:36:38,916 INFO L175 Difference]: Start difference. First operand has 239 places, 477 transitions, 9364 flow. Second operand 7 states and 108 transitions. [2024-06-28 03:36:38,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 491 transitions, 10442 flow [2024-06-28 03:36:39,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 491 transitions, 10246 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:36:39,916 INFO L231 Difference]: Finished difference. Result has 240 places, 480 transitions, 9274 flow [2024-06-28 03:36:39,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9168, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9274, PETRI_PLACES=240, PETRI_TRANSITIONS=480} [2024-06-28 03:36:39,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-28 03:36:39,917 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 480 transitions, 9274 flow [2024-06-28 03:36:39,917 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) [2024-06-28 03:36:39,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:39,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:39,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:36:39,918 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)] === [2024-06-28 03:36:39,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:39,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1899827998, now seen corresponding path program 1 times [2024-06-28 03:36:39,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:39,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656178454] [2024-06-28 03:36:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:39,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:40,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:40,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656178454] [2024-06-28 03:36:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656178454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:40,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:40,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556465161] [2024-06-28 03:36:40,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:40,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:40,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:40,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:40,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:40,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 480 transitions, 9274 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:40,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:40,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:40,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:42,863 INFO L124 PetriNetUnfolderBase]: 6046/9504 cut-off events. [2024-06-28 03:36:42,863 INFO L125 PetriNetUnfolderBase]: For 350901/350901 co-relation queries the response was YES. [2024-06-28 03:36:42,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72859 conditions, 9504 events. 6046/9504 cut-off events. For 350901/350901 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 61431 event pairs, 2656 based on Foata normal form. 6/9510 useless extension candidates. Maximal degree in co-relation 72749. Up to 9274 conditions per place. [2024-06-28 03:36:43,000 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 481 selfloop transitions, 17 changer transitions 0/501 dead transitions. [2024-06-28 03:36:43,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 501 transitions, 10388 flow [2024-06-28 03:36:43,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:43,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:36:43,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:36:43,010 INFO L175 Difference]: Start difference. First operand has 240 places, 480 transitions, 9274 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:36:43,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 501 transitions, 10388 flow [2024-06-28 03:36:44,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 501 transitions, 10300 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:44,348 INFO L231 Difference]: Finished difference. Result has 242 places, 483 transitions, 9271 flow [2024-06-28 03:36:44,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9186, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9271, PETRI_PLACES=242, PETRI_TRANSITIONS=483} [2024-06-28 03:36:44,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-28 03:36:44,350 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 483 transitions, 9271 flow [2024-06-28 03:36:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:44,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:44,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:44,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:36:44,350 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)] === [2024-06-28 03:36:44,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:44,351 INFO L85 PathProgramCache]: Analyzing trace with hash -884487114, now seen corresponding path program 2 times [2024-06-28 03:36:44,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:44,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462681879] [2024-06-28 03:36:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:44,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:45,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462681879] [2024-06-28 03:36:45,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462681879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182051235] [2024-06-28 03:36:45,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:45,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:45,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 483 transitions, 9271 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:45,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:45,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:45,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:47,078 INFO L124 PetriNetUnfolderBase]: 6076/9546 cut-off events. [2024-06-28 03:36:47,078 INFO L125 PetriNetUnfolderBase]: For 362621/362621 co-relation queries the response was YES. [2024-06-28 03:36:47,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73788 conditions, 9546 events. 6076/9546 cut-off events. For 362621/362621 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 61635 event pairs, 2650 based on Foata normal form. 6/9552 useless extension candidates. Maximal degree in co-relation 73677. Up to 9220 conditions per place. [2024-06-28 03:36:47,178 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 476 selfloop transitions, 34 changer transitions 0/513 dead transitions. [2024-06-28 03:36:47,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 513 transitions, 10582 flow [2024-06-28 03:36:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-28 03:36:47,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-28 03:36:47,201 INFO L175 Difference]: Start difference. First operand has 242 places, 483 transitions, 9271 flow. Second operand 7 states and 125 transitions. [2024-06-28 03:36:47,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 513 transitions, 10582 flow [2024-06-28 03:36:48,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 513 transitions, 10517 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:36:48,463 INFO L231 Difference]: Finished difference. Result has 244 places, 489 transitions, 9381 flow [2024-06-28 03:36:48,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9212, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9381, PETRI_PLACES=244, PETRI_TRANSITIONS=489} [2024-06-28 03:36:48,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-28 03:36:48,464 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 489 transitions, 9381 flow [2024-06-28 03:36:48,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:48,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:48,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:48,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:36:48,465 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:48,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2111227810, now seen corresponding path program 3 times [2024-06-28 03:36:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:48,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418294964] [2024-06-28 03:36:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:49,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418294964] [2024-06-28 03:36:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418294964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:49,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:49,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229511705] [2024-06-28 03:36:49,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:49,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:49,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 489 transitions, 9381 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:49,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:49,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:49,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:51,233 INFO L124 PetriNetUnfolderBase]: 6058/9524 cut-off events. [2024-06-28 03:36:51,233 INFO L125 PetriNetUnfolderBase]: For 369624/369626 co-relation queries the response was YES. [2024-06-28 03:36:51,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73988 conditions, 9524 events. 6058/9524 cut-off events. For 369624/369626 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 61498 event pairs, 2650 based on Foata normal form. 6/9530 useless extension candidates. Maximal degree in co-relation 73876. Up to 9209 conditions per place. [2024-06-28 03:36:51,330 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 469 selfloop transitions, 34 changer transitions 0/506 dead transitions. [2024-06-28 03:36:51,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 506 transitions, 10462 flow [2024-06-28 03:36:51,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:51,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-28 03:36:51,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-28 03:36:51,332 INFO L175 Difference]: Start difference. First operand has 244 places, 489 transitions, 9381 flow. Second operand 7 states and 119 transitions. [2024-06-28 03:36:51,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 506 transitions, 10462 flow [2024-06-28 03:36:52,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 506 transitions, 10384 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-28 03:36:52,470 INFO L231 Difference]: Finished difference. Result has 248 places, 489 transitions, 9378 flow [2024-06-28 03:36:52,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9303, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9378, PETRI_PLACES=248, PETRI_TRANSITIONS=489} [2024-06-28 03:36:52,471 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-28 03:36:52,471 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 489 transitions, 9378 flow [2024-06-28 03:36:52,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:36:52,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:52,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:52,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:36:52,471 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:52,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1214288700, now seen corresponding path program 1 times [2024-06-28 03:36:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:52,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800655774] [2024-06-28 03:36:52,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:52,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:53,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:53,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800655774] [2024-06-28 03:36:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800655774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:53,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:53,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:36:53,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751315330] [2024-06-28 03:36:53,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:53,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:36:53,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:36:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:36:53,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:53,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 489 transitions, 9378 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) [2024-06-28 03:36:53,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:53,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:53,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:55,541 INFO L124 PetriNetUnfolderBase]: 6053/9515 cut-off events. [2024-06-28 03:36:55,541 INFO L125 PetriNetUnfolderBase]: For 373110/373110 co-relation queries the response was YES. [2024-06-28 03:36:55,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73984 conditions, 9515 events. 6053/9515 cut-off events. For 373110/373110 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61381 event pairs, 2643 based on Foata normal form. 2/9517 useless extension candidates. Maximal degree in co-relation 73870. Up to 9321 conditions per place. [2024-06-28 03:36:55,643 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 485 selfloop transitions, 14 changer transitions 0/502 dead transitions. [2024-06-28 03:36:55,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 502 transitions, 10452 flow [2024-06-28 03:36:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:36:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:36:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-28 03:36:55,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821428571428571 [2024-06-28 03:36:55,644 INFO L175 Difference]: Start difference. First operand has 248 places, 489 transitions, 9378 flow. Second operand 7 states and 107 transitions. [2024-06-28 03:36:55,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 502 transitions, 10452 flow [2024-06-28 03:36:56,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 502 transitions, 10348 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:36:56,802 INFO L231 Difference]: Finished difference. Result has 248 places, 491 transitions, 9351 flow [2024-06-28 03:36:56,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9274, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9351, PETRI_PLACES=248, PETRI_TRANSITIONS=491} [2024-06-28 03:36:56,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-28 03:36:56,809 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 491 transitions, 9351 flow [2024-06-28 03:36:56,809 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) [2024-06-28 03:36:56,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:36:56,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:36:56,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:36:56,809 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:36:56,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:36:56,810 INFO L85 PathProgramCache]: Analyzing trace with hash 832401947, now seen corresponding path program 1 times [2024-06-28 03:36:56,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:36:56,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130405915] [2024-06-28 03:36:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:36:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:36:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:36:57,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:36:57,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:36:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130405915] [2024-06-28 03:36:57,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130405915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:36:57,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:36:57,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:36:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524790229] [2024-06-28 03:36:57,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:36:57,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:36:57,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:36:57,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:36:57,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:36:57,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:36:57,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 491 transitions, 9351 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) [2024-06-28 03:36:57,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:36:57,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:36:57,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:36:59,287 INFO L124 PetriNetUnfolderBase]: 6090/9538 cut-off events. [2024-06-28 03:36:59,288 INFO L125 PetriNetUnfolderBase]: For 383665/383732 co-relation queries the response was YES. [2024-06-28 03:36:59,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74551 conditions, 9538 events. 6090/9538 cut-off events. For 383665/383732 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 61307 event pairs, 1930 based on Foata normal form. 66/9604 useless extension candidates. Maximal degree in co-relation 74437. Up to 8888 conditions per place. [2024-06-28 03:36:59,398 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 461 selfloop transitions, 102 changer transitions 0/566 dead transitions. [2024-06-28 03:36:59,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 566 transitions, 11480 flow [2024-06-28 03:36:59,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:36:59,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:36:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-28 03:36:59,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465625 [2024-06-28 03:36:59,407 INFO L175 Difference]: Start difference. First operand has 248 places, 491 transitions, 9351 flow. Second operand 8 states and 149 transitions. [2024-06-28 03:36:59,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 566 transitions, 11480 flow [2024-06-28 03:37:00,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 566 transitions, 11419 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-28 03:37:00,625 INFO L231 Difference]: Finished difference. Result has 254 places, 525 transitions, 10193 flow [2024-06-28 03:37:00,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9290, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10193, PETRI_PLACES=254, PETRI_TRANSITIONS=525} [2024-06-28 03:37:00,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-28 03:37:00,626 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 525 transitions, 10193 flow [2024-06-28 03:37:00,626 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) [2024-06-28 03:37:00,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:00,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:37:00,626 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:37:00,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:00,627 INFO L85 PathProgramCache]: Analyzing trace with hash -621653221, now seen corresponding path program 1 times [2024-06-28 03:37:00,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:00,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74705103] [2024-06-28 03:37:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:00,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:01,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:01,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:01,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74705103] [2024-06-28 03:37:01,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74705103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:01,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:01,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:37:01,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874320891] [2024-06-28 03:37:01,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:01,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:37:01,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:01,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:37:01,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:37:01,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:01,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 525 transitions, 10193 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) [2024-06-28 03:37:01,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:01,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:01,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:03,218 INFO L124 PetriNetUnfolderBase]: 6168/9660 cut-off events. [2024-06-28 03:37:03,219 INFO L125 PetriNetUnfolderBase]: For 414700/414720 co-relation queries the response was YES. [2024-06-28 03:37:03,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77756 conditions, 9660 events. 6168/9660 cut-off events. For 414700/414720 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 62226 event pairs, 2192 based on Foata normal form. 26/9686 useless extension candidates. Maximal degree in co-relation 77638. Up to 9033 conditions per place. [2024-06-28 03:37:03,345 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 461 selfloop transitions, 105 changer transitions 0/569 dead transitions. [2024-06-28 03:37:03,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 569 transitions, 12058 flow [2024-06-28 03:37:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:37:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:37:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-28 03:37:03,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-06-28 03:37:03,347 INFO L175 Difference]: Start difference. First operand has 254 places, 525 transitions, 10193 flow. Second operand 8 states and 151 transitions. [2024-06-28 03:37:03,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 569 transitions, 12058 flow [2024-06-28 03:37:04,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 569 transitions, 11996 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-28 03:37:04,769 INFO L231 Difference]: Finished difference. Result has 260 places, 540 transitions, 10672 flow [2024-06-28 03:37:04,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10131, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10672, PETRI_PLACES=260, PETRI_TRANSITIONS=540} [2024-06-28 03:37:04,770 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-28 03:37:04,770 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 540 transitions, 10672 flow [2024-06-28 03:37:04,770 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) [2024-06-28 03:37:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:04,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:37:04,771 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)] === [2024-06-28 03:37:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 337198974, now seen corresponding path program 1 times [2024-06-28 03:37:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:04,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230871320] [2024-06-28 03:37:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:05,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230871320] [2024-06-28 03:37:05,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230871320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:05,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:05,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:37:05,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628825978] [2024-06-28 03:37:05,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:05,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:37:05,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:37:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:37:05,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:05,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 540 transitions, 10672 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:05,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:05,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:05,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:08,026 INFO L124 PetriNetUnfolderBase]: 6236/9771 cut-off events. [2024-06-28 03:37:08,026 INFO L125 PetriNetUnfolderBase]: For 440346/440357 co-relation queries the response was YES. [2024-06-28 03:37:08,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79253 conditions, 9771 events. 6236/9771 cut-off events. For 440346/440357 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 63116 event pairs, 2012 based on Foata normal form. 28/9799 useless extension candidates. Maximal degree in co-relation 79133. Up to 8923 conditions per place. [2024-06-28 03:37:08,154 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 436 selfloop transitions, 143 changer transitions 0/582 dead transitions. [2024-06-28 03:37:08,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 582 transitions, 12086 flow [2024-06-28 03:37:08,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:37:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:37:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:37:08,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-28 03:37:08,156 INFO L175 Difference]: Start difference. First operand has 260 places, 540 transitions, 10672 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:37:08,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 582 transitions, 12086 flow [2024-06-28 03:37:09,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 582 transitions, 11911 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 03:37:09,410 INFO L231 Difference]: Finished difference. Result has 266 places, 542 transitions, 10878 flow [2024-06-28 03:37:09,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10497, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10878, PETRI_PLACES=266, PETRI_TRANSITIONS=542} [2024-06-28 03:37:09,411 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-28 03:37:09,411 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 542 transitions, 10878 flow [2024-06-28 03:37:09,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:09,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:09,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:37:09,412 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)] === [2024-06-28 03:37:09,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:09,413 INFO L85 PathProgramCache]: Analyzing trace with hash -348591020, now seen corresponding path program 2 times [2024-06-28 03:37:09,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:09,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505601159] [2024-06-28 03:37:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:09,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505601159] [2024-06-28 03:37:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505601159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:37:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940205217] [2024-06-28 03:37:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:37:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:37:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:37:10,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:10,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 542 transitions, 10878 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:10,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:10,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:10,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:12,845 INFO L124 PetriNetUnfolderBase]: 6304/9887 cut-off events. [2024-06-28 03:37:12,845 INFO L125 PetriNetUnfolderBase]: For 464264/464284 co-relation queries the response was YES. [2024-06-28 03:37:12,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80579 conditions, 9887 events. 6304/9887 cut-off events. For 464264/464284 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 64089 event pairs, 2049 based on Foata normal form. 38/9925 useless extension candidates. Maximal degree in co-relation 80458. Up to 9039 conditions per place. [2024-06-28 03:37:12,978 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 443 selfloop transitions, 137 changer transitions 0/583 dead transitions. [2024-06-28 03:37:12,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 583 transitions, 12294 flow [2024-06-28 03:37:12,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:37:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:37:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:37:12,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-28 03:37:12,980 INFO L175 Difference]: Start difference. First operand has 266 places, 542 transitions, 10878 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:37:12,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 583 transitions, 12294 flow [2024-06-28 03:37:14,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 583 transitions, 12079 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-28 03:37:14,471 INFO L231 Difference]: Finished difference. Result has 271 places, 544 transitions, 11036 flow [2024-06-28 03:37:14,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10663, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11036, PETRI_PLACES=271, PETRI_TRANSITIONS=544} [2024-06-28 03:37:14,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-28 03:37:14,473 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 544 transitions, 11036 flow [2024-06-28 03:37:14,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:14,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:14,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:14,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:37:14,473 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)] === [2024-06-28 03:37:14,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:14,474 INFO L85 PathProgramCache]: Analyzing trace with hash -348360380, now seen corresponding path program 3 times [2024-06-28 03:37:14,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081129994] [2024-06-28 03:37:14,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:15,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:15,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081129994] [2024-06-28 03:37:15,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081129994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:15,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:15,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:37:15,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382410586] [2024-06-28 03:37:15,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:15,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:37:15,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:37:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:37:15,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:15,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 544 transitions, 11036 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:15,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:15,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:15,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:17,860 INFO L124 PetriNetUnfolderBase]: 6311/9904 cut-off events. [2024-06-28 03:37:17,860 INFO L125 PetriNetUnfolderBase]: For 472598/472618 co-relation queries the response was YES. [2024-06-28 03:37:17,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80362 conditions, 9904 events. 6311/9904 cut-off events. For 472598/472618 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 64301 event pairs, 2009 based on Foata normal form. 38/9942 useless extension candidates. Maximal degree in co-relation 80240. Up to 8889 conditions per place. [2024-06-28 03:37:17,987 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 431 selfloop transitions, 150 changer transitions 0/584 dead transitions. [2024-06-28 03:37:17,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 584 transitions, 12410 flow [2024-06-28 03:37:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:37:17,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:37:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:37:17,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-28 03:37:17,996 INFO L175 Difference]: Start difference. First operand has 271 places, 544 transitions, 11036 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:37:17,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 584 transitions, 12410 flow [2024-06-28 03:37:19,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 584 transitions, 12046 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 03:37:19,479 INFO L231 Difference]: Finished difference. Result has 273 places, 545 transitions, 11033 flow [2024-06-28 03:37:19,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10672, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11033, PETRI_PLACES=273, PETRI_TRANSITIONS=545} [2024-06-28 03:37:19,480 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-28 03:37:19,480 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 545 transitions, 11033 flow [2024-06-28 03:37:19,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:19,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:19,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:19,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:37:19,481 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:37:19,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:19,481 INFO L85 PathProgramCache]: Analyzing trace with hash -622323783, now seen corresponding path program 2 times [2024-06-28 03:37:19,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:19,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748572832] [2024-06-28 03:37:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:19,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:20,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:20,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748572832] [2024-06-28 03:37:20,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748572832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:20,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:20,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:37:20,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660886350] [2024-06-28 03:37:20,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:20,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:37:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:37:20,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:37:20,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:20,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 545 transitions, 11033 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) [2024-06-28 03:37:20,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:20,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:20,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:22,454 INFO L124 PetriNetUnfolderBase]: 6287/9874 cut-off events. [2024-06-28 03:37:22,454 INFO L125 PetriNetUnfolderBase]: For 460904/460924 co-relation queries the response was YES. [2024-06-28 03:37:22,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79810 conditions, 9874 events. 6287/9874 cut-off events. For 460904/460924 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 64179 event pairs, 2243 based on Foata normal form. 28/9902 useless extension candidates. Maximal degree in co-relation 79687. Up to 9262 conditions per place. [2024-06-28 03:37:22,592 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 461 selfloop transitions, 104 changer transitions 0/568 dead transitions. [2024-06-28 03:37:22,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 568 transitions, 12463 flow [2024-06-28 03:37:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:37:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:37:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-28 03:37:22,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:37:22,594 INFO L175 Difference]: Start difference. First operand has 273 places, 545 transitions, 11033 flow. Second operand 8 states and 144 transitions. [2024-06-28 03:37:22,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 568 transitions, 12463 flow [2024-06-28 03:37:24,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 568 transitions, 12066 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-28 03:37:24,160 INFO L231 Difference]: Finished difference. Result has 273 places, 545 transitions, 10865 flow [2024-06-28 03:37:24,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10636, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10865, PETRI_PLACES=273, PETRI_TRANSITIONS=545} [2024-06-28 03:37:24,161 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-28 03:37:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 545 transitions, 10865 flow [2024-06-28 03:37:24,161 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) [2024-06-28 03:37:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:37:24,162 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:37:24,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash -823411777, now seen corresponding path program 2 times [2024-06-28 03:37:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839406492] [2024-06-28 03:37:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:25,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:25,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839406492] [2024-06-28 03:37:25,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839406492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:25,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:25,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:37:25,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003371520] [2024-06-28 03:37:25,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:37:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:37:25,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:37:25,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:25,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 545 transitions, 10865 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:25,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:25,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:25,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:27,540 INFO L124 PetriNetUnfolderBase]: 6389/10013 cut-off events. [2024-06-28 03:37:27,540 INFO L125 PetriNetUnfolderBase]: For 471784/471801 co-relation queries the response was YES. [2024-06-28 03:37:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80716 conditions, 10013 events. 6389/10013 cut-off events. For 471784/471801 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 65026 event pairs, 2245 based on Foata normal form. 22/10035 useless extension candidates. Maximal degree in co-relation 80592. Up to 9297 conditions per place. [2024-06-28 03:37:27,705 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 467 selfloop transitions, 136 changer transitions 0/606 dead transitions. [2024-06-28 03:37:27,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 606 transitions, 12886 flow [2024-06-28 03:37:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:37:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:37:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-28 03:37:27,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-28 03:37:27,707 INFO L175 Difference]: Start difference. First operand has 273 places, 545 transitions, 10865 flow. Second operand 10 states and 187 transitions. [2024-06-28 03:37:27,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 606 transitions, 12886 flow [2024-06-28 03:37:29,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 606 transitions, 12755 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-28 03:37:29,667 INFO L231 Difference]: Finished difference. Result has 279 places, 570 transitions, 11446 flow [2024-06-28 03:37:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=10740, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11446, PETRI_PLACES=279, PETRI_TRANSITIONS=570} [2024-06-28 03:37:29,668 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2024-06-28 03:37:29,668 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 570 transitions, 11446 flow [2024-06-28 03:37:29,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:29,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:29,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:29,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:37:29,668 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)] === [2024-06-28 03:37:29,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 350944219, now seen corresponding path program 3 times [2024-06-28 03:37:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:29,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004627389] [2024-06-28 03:37:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:29,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:30,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:30,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004627389] [2024-06-28 03:37:30,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004627389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:30,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:30,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:37:30,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54502032] [2024-06-28 03:37:30,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:30,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:37:30,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:30,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:37:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:37:30,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:30,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 570 transitions, 11446 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) [2024-06-28 03:37:30,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:30,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:30,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:32,811 INFO L124 PetriNetUnfolderBase]: 6377/10001 cut-off events. [2024-06-28 03:37:32,812 INFO L125 PetriNetUnfolderBase]: For 472038/472068 co-relation queries the response was YES. [2024-06-28 03:37:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81480 conditions, 10001 events. 6377/10001 cut-off events. For 472038/472068 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 65034 event pairs, 2222 based on Foata normal form. 36/10037 useless extension candidates. Maximal degree in co-relation 81355. Up to 9363 conditions per place. [2024-06-28 03:37:32,937 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 481 selfloop transitions, 112 changer transitions 0/596 dead transitions. [2024-06-28 03:37:32,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 596 transitions, 12952 flow [2024-06-28 03:37:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:37:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:37:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:37:32,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 03:37:32,939 INFO L175 Difference]: Start difference. First operand has 279 places, 570 transitions, 11446 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:37:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 596 transitions, 12952 flow [2024-06-28 03:37:34,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 596 transitions, 12632 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-06-28 03:37:34,411 INFO L231 Difference]: Finished difference. Result has 282 places, 571 transitions, 11376 flow [2024-06-28 03:37:34,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11130, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11376, PETRI_PLACES=282, PETRI_TRANSITIONS=571} [2024-06-28 03:37:34,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-28 03:37:34,412 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 571 transitions, 11376 flow [2024-06-28 03:37:34,412 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) [2024-06-28 03:37:34,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:34,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:34,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:37:34,413 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)] === [2024-06-28 03:37:34,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:34,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1852454133, now seen corresponding path program 4 times [2024-06-28 03:37:34,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:34,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241850438] [2024-06-28 03:37:34,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:34,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:35,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:35,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241850438] [2024-06-28 03:37:35,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241850438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:35,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:35,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:37:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425620912] [2024-06-28 03:37:35,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:35,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:37:35,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:35,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:37:35,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:37:35,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:35,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 571 transitions, 11376 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:35,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:35,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:35,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:37,471 INFO L124 PetriNetUnfolderBase]: 6417/10056 cut-off events. [2024-06-28 03:37:37,471 INFO L125 PetriNetUnfolderBase]: For 476001/476018 co-relation queries the response was YES. [2024-06-28 03:37:37,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82150 conditions, 10056 events. 6417/10056 cut-off events. For 476001/476018 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 65463 event pairs, 2223 based on Foata normal form. 18/10074 useless extension candidates. Maximal degree in co-relation 82023. Up to 9453 conditions per place. [2024-06-28 03:37:37,591 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 475 selfloop transitions, 142 changer transitions 0/620 dead transitions. [2024-06-28 03:37:37,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 620 transitions, 13194 flow [2024-06-28 03:37:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:37:37,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:37:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:37:37,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-28 03:37:37,592 INFO L175 Difference]: Start difference. First operand has 282 places, 571 transitions, 11376 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:37:37,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 620 transitions, 13194 flow [2024-06-28 03:37:39,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 620 transitions, 12979 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-28 03:37:39,180 INFO L231 Difference]: Finished difference. Result has 287 places, 591 transitions, 11868 flow [2024-06-28 03:37:39,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11167, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11868, PETRI_PLACES=287, PETRI_TRANSITIONS=591} [2024-06-28 03:37:39,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-28 03:37:39,181 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 591 transitions, 11868 flow [2024-06-28 03:37:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:39,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:39,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:39,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:37:39,182 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)] === [2024-06-28 03:37:39,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1441891881, now seen corresponding path program 3 times [2024-06-28 03:37:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:39,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034423692] [2024-06-28 03:37:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:39,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:39,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:39,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034423692] [2024-06-28 03:37:39,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034423692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:39,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:39,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:37:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69890945] [2024-06-28 03:37:39,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:39,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:37:39,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:37:39,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:37:39,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:39,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 591 transitions, 11868 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) [2024-06-28 03:37:39,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:39,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:39,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:42,088 INFO L124 PetriNetUnfolderBase]: 6501/10176 cut-off events. [2024-06-28 03:37:42,088 INFO L125 PetriNetUnfolderBase]: For 514072/514102 co-relation queries the response was YES. [2024-06-28 03:37:42,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84409 conditions, 10176 events. 6501/10176 cut-off events. For 514072/514102 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 66256 event pairs, 2286 based on Foata normal form. 42/10218 useless extension candidates. Maximal degree in co-relation 84278. Up to 9360 conditions per place. [2024-06-28 03:37:42,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 482 selfloop transitions, 155 changer transitions 0/640 dead transitions. [2024-06-28 03:37:42,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 640 transitions, 14059 flow [2024-06-28 03:37:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:37:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:37:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-28 03:37:42,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46785714285714286 [2024-06-28 03:37:42,201 INFO L175 Difference]: Start difference. First operand has 287 places, 591 transitions, 11868 flow. Second operand 7 states and 131 transitions. [2024-06-28 03:37:42,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 640 transitions, 14059 flow [2024-06-28 03:37:43,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 640 transitions, 13882 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-28 03:37:43,451 INFO L231 Difference]: Finished difference. Result has 292 places, 613 transitions, 12622 flow [2024-06-28 03:37:43,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11700, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12622, PETRI_PLACES=292, PETRI_TRANSITIONS=613} [2024-06-28 03:37:43,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-28 03:37:43,452 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 613 transitions, 12622 flow [2024-06-28 03:37:43,452 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) [2024-06-28 03:37:43,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:43,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:43,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:37:43,452 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)] === [2024-06-28 03:37:43,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -411664297, now seen corresponding path program 4 times [2024-06-28 03:37:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:43,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564025384] [2024-06-28 03:37:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:43,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:43,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:43,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564025384] [2024-06-28 03:37:43,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564025384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:43,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:43,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:37:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910272938] [2024-06-28 03:37:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:43,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:37:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:37:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:37:44,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:44,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 613 transitions, 12622 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) [2024-06-28 03:37:44,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:44,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:44,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:46,283 INFO L124 PetriNetUnfolderBase]: 6483/10149 cut-off events. [2024-06-28 03:37:46,283 INFO L125 PetriNetUnfolderBase]: For 512632/512662 co-relation queries the response was YES. [2024-06-28 03:37:46,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84538 conditions, 10149 events. 6483/10149 cut-off events. For 512632/512662 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 66024 event pairs, 2223 based on Foata normal form. 36/10185 useless extension candidates. Maximal degree in co-relation 84405. Up to 9349 conditions per place. [2024-06-28 03:37:46,452 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 492 selfloop transitions, 142 changer transitions 0/637 dead transitions. [2024-06-28 03:37:46,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 637 transitions, 14263 flow [2024-06-28 03:37:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:37:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:37:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-28 03:37:46,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-28 03:37:46,454 INFO L175 Difference]: Start difference. First operand has 292 places, 613 transitions, 12622 flow. Second operand 7 states and 128 transitions. [2024-06-28 03:37:46,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 637 transitions, 14263 flow [2024-06-28 03:37:48,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 637 transitions, 13990 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-28 03:37:48,232 INFO L231 Difference]: Finished difference. Result has 294 places, 613 transitions, 12672 flow [2024-06-28 03:37:48,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12353, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12672, PETRI_PLACES=294, PETRI_TRANSITIONS=613} [2024-06-28 03:37:48,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-28 03:37:48,233 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 613 transitions, 12672 flow [2024-06-28 03:37:48,234 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) [2024-06-28 03:37:48,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:48,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:48,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:37:48,234 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:37:48,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash -196500372, now seen corresponding path program 4 times [2024-06-28 03:37:48,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:48,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30039642] [2024-06-28 03:37:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:48,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:49,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:49,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30039642] [2024-06-28 03:37:49,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30039642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:49,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:37:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131641410] [2024-06-28 03:37:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:49,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:37:49,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:37:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:37:49,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:49,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 613 transitions, 12672 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:49,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:49,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:49,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:51,709 INFO L124 PetriNetUnfolderBase]: 6605/10347 cut-off events. [2024-06-28 03:37:51,709 INFO L125 PetriNetUnfolderBase]: For 551635/551652 co-relation queries the response was YES. [2024-06-28 03:37:51,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86181 conditions, 10347 events. 6605/10347 cut-off events. For 551635/551652 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 67473 event pairs, 2015 based on Foata normal form. 44/10391 useless extension candidates. Maximal degree in co-relation 86048. Up to 9221 conditions per place. [2024-06-28 03:37:51,855 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 489 selfloop transitions, 170 changer transitions 0/662 dead transitions. [2024-06-28 03:37:51,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 662 transitions, 14447 flow [2024-06-28 03:37:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:37:51,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:37:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-28 03:37:51,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2024-06-28 03:37:51,857 INFO L175 Difference]: Start difference. First operand has 294 places, 613 transitions, 12672 flow. Second operand 9 states and 164 transitions. [2024-06-28 03:37:51,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 662 transitions, 14447 flow [2024-06-28 03:37:53,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 662 transitions, 14222 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-28 03:37:53,405 INFO L231 Difference]: Finished difference. Result has 298 places, 617 transitions, 12991 flow [2024-06-28 03:37:53,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12447, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12991, PETRI_PLACES=298, PETRI_TRANSITIONS=617} [2024-06-28 03:37:53,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 257 predicate places. [2024-06-28 03:37:53,406 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 617 transitions, 12991 flow [2024-06-28 03:37:53,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:53,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:53,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:37:53,407 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:37:53,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1905470690, now seen corresponding path program 5 times [2024-06-28 03:37:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:53,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050997325] [2024-06-28 03:37:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:37:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:37:54,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:37:54,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050997325] [2024-06-28 03:37:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050997325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:37:54,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:37:54,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:37:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863682704] [2024-06-28 03:37:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:37:54,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:37:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:37:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:37:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:37:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:37:54,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 617 transitions, 12991 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:54,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:37:54,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:37:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:37:57,110 INFO L124 PetriNetUnfolderBase]: 6727/10576 cut-off events. [2024-06-28 03:37:57,110 INFO L125 PetriNetUnfolderBase]: For 572004/572034 co-relation queries the response was YES. [2024-06-28 03:37:57,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88350 conditions, 10576 events. 6727/10576 cut-off events. For 572004/572034 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 69766 event pairs, 2105 based on Foata normal form. 58/10634 useless extension candidates. Maximal degree in co-relation 88217. Up to 9437 conditions per place. [2024-06-28 03:37:57,262 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 503 selfloop transitions, 157 changer transitions 0/663 dead transitions. [2024-06-28 03:37:57,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 663 transitions, 14758 flow [2024-06-28 03:37:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:37:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:37:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:37:57,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:37:57,264 INFO L175 Difference]: Start difference. First operand has 298 places, 617 transitions, 12991 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:37:57,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 663 transitions, 14758 flow [2024-06-28 03:37:59,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 663 transitions, 14284 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-28 03:37:59,315 INFO L231 Difference]: Finished difference. Result has 300 places, 621 transitions, 13042 flow [2024-06-28 03:37:59,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12519, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13042, PETRI_PLACES=300, PETRI_TRANSITIONS=621} [2024-06-28 03:37:59,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-28 03:37:59,316 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 621 transitions, 13042 flow [2024-06-28 03:37:59,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:37:59,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:37:59,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:37:59,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:37:59,317 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)] === [2024-06-28 03:37:59,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:37:59,317 INFO L85 PathProgramCache]: Analyzing trace with hash -23779842, now seen corresponding path program 6 times [2024-06-28 03:37:59,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:37:59,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509311375] [2024-06-28 03:37:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:37:59,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:37:59,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509311375] [2024-06-28 03:38:00,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509311375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:00,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:00,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:38:00,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330831892] [2024-06-28 03:38:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:00,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:38:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:00,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:38:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:38:00,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:00,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 621 transitions, 13042 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:00,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:00,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:00,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:03,473 INFO L124 PetriNetUnfolderBase]: 6849/10781 cut-off events. [2024-06-28 03:38:03,473 INFO L125 PetriNetUnfolderBase]: For 578684/578714 co-relation queries the response was YES. [2024-06-28 03:38:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89513 conditions, 10781 events. 6849/10781 cut-off events. For 578684/578714 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 71576 event pairs, 2086 based on Foata normal form. 60/10841 useless extension candidates. Maximal degree in co-relation 89379. Up to 9244 conditions per place. [2024-06-28 03:38:03,669 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 484 selfloop transitions, 176 changer transitions 0/663 dead transitions. [2024-06-28 03:38:03,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 663 transitions, 14752 flow [2024-06-28 03:38:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:38:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:38:03,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:38:03,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-28 03:38:03,671 INFO L175 Difference]: Start difference. First operand has 300 places, 621 transitions, 13042 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:38:03,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 663 transitions, 14752 flow [2024-06-28 03:38:05,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 663 transitions, 14369 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-28 03:38:05,489 INFO L231 Difference]: Finished difference. Result has 303 places, 625 transitions, 13228 flow [2024-06-28 03:38:05,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12661, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13228, PETRI_PLACES=303, PETRI_TRANSITIONS=625} [2024-06-28 03:38:05,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-28 03:38:05,489 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 625 transitions, 13228 flow [2024-06-28 03:38:05,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:05,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:05,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:05,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:38:05,490 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:38:05,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1873466777, now seen corresponding path program 5 times [2024-06-28 03:38:05,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:05,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058997717] [2024-06-28 03:38:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:06,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058997717] [2024-06-28 03:38:06,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058997717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:06,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:06,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:38:06,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723472432] [2024-06-28 03:38:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:06,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:38:06,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:38:06,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:38:06,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:06,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 625 transitions, 13228 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) [2024-06-28 03:38:06,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:06,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:06,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:08,813 INFO L124 PetriNetUnfolderBase]: 6879/10807 cut-off events. [2024-06-28 03:38:08,813 INFO L125 PetriNetUnfolderBase]: For 538078/538095 co-relation queries the response was YES. [2024-06-28 03:38:08,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89507 conditions, 10807 events. 6879/10807 cut-off events. For 538078/538095 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 71651 event pairs, 2489 based on Foata normal form. 22/10829 useless extension candidates. Maximal degree in co-relation 89372. Up to 9937 conditions per place. [2024-06-28 03:38:08,952 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 466 selfloop transitions, 191 changer transitions 0/660 dead transitions. [2024-06-28 03:38:08,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 660 transitions, 14913 flow [2024-06-28 03:38:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:38:08,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-28 03:38:08,953 INFO L175 Difference]: Start difference. First operand has 303 places, 625 transitions, 13228 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:38:08,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 660 transitions, 14913 flow [2024-06-28 03:38:10,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 660 transitions, 14427 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-28 03:38:10,541 INFO L231 Difference]: Finished difference. Result has 304 places, 633 transitions, 13309 flow [2024-06-28 03:38:10,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12744, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13309, PETRI_PLACES=304, PETRI_TRANSITIONS=633} [2024-06-28 03:38:10,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 263 predicate places. [2024-06-28 03:38:10,542 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 633 transitions, 13309 flow [2024-06-28 03:38:10,542 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) [2024-06-28 03:38:10,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:10,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:38:10,542 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:38:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1864212347, now seen corresponding path program 6 times [2024-06-28 03:38:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144423052] [2024-06-28 03:38:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:11,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:11,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144423052] [2024-06-28 03:38:11,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144423052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:11,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:11,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:38:11,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401777474] [2024-06-28 03:38:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:38:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:38:11,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:38:11,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:11,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 633 transitions, 13309 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) [2024-06-28 03:38:11,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:11,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:11,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:13,993 INFO L124 PetriNetUnfolderBase]: 6915/10861 cut-off events. [2024-06-28 03:38:13,993 INFO L125 PetriNetUnfolderBase]: For 530117/530147 co-relation queries the response was YES. [2024-06-28 03:38:14,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89892 conditions, 10861 events. 6915/10861 cut-off events. For 530117/530147 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 71948 event pairs, 2478 based on Foata normal form. 36/10897 useless extension candidates. Maximal degree in co-relation 89756. Up to 10008 conditions per place. [2024-06-28 03:38:14,119 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 502 selfloop transitions, 162 changer transitions 0/667 dead transitions. [2024-06-28 03:38:14,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 667 transitions, 15161 flow [2024-06-28 03:38:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:38:14,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 03:38:14,121 INFO L175 Difference]: Start difference. First operand has 304 places, 633 transitions, 13309 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:38:14,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 667 transitions, 15161 flow [2024-06-28 03:38:15,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 667 transitions, 14850 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-28 03:38:15,694 INFO L231 Difference]: Finished difference. Result has 307 places, 641 transitions, 13509 flow [2024-06-28 03:38:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12998, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13509, PETRI_PLACES=307, PETRI_TRANSITIONS=641} [2024-06-28 03:38:15,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 266 predicate places. [2024-06-28 03:38:15,695 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 641 transitions, 13509 flow [2024-06-28 03:38:15,695 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) [2024-06-28 03:38:15,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:15,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:15,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:38:15,695 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)] === [2024-06-28 03:38:15,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:15,696 INFO L85 PathProgramCache]: Analyzing trace with hash -375342155, now seen corresponding path program 5 times [2024-06-28 03:38:15,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:15,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798589590] [2024-06-28 03:38:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:15,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:16,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:16,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:16,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798589590] [2024-06-28 03:38:16,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798589590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:16,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:16,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:38:16,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718300946] [2024-06-28 03:38:16,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:16,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:38:16,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:16,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:38:16,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:38:16,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:16,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 641 transitions, 13509 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) [2024-06-28 03:38:16,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:16,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:16,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:18,634 INFO L124 PetriNetUnfolderBase]: 6873/10803 cut-off events. [2024-06-28 03:38:18,634 INFO L125 PetriNetUnfolderBase]: For 539309/539309 co-relation queries the response was YES. [2024-06-28 03:38:18,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90101 conditions, 10803 events. 6873/10803 cut-off events. For 539309/539309 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 71423 event pairs, 2988 based on Foata normal form. 6/10809 useless extension candidates. Maximal degree in co-relation 89964. Up to 10574 conditions per place. [2024-06-28 03:38:18,825 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 623 selfloop transitions, 36 changer transitions 0/662 dead transitions. [2024-06-28 03:38:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 662 transitions, 15079 flow [2024-06-28 03:38:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:38:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:38:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-28 03:38:18,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:38:18,826 INFO L175 Difference]: Start difference. First operand has 307 places, 641 transitions, 13509 flow. Second operand 7 states and 120 transitions. [2024-06-28 03:38:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 662 transitions, 15079 flow [2024-06-28 03:38:21,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 662 transitions, 14718 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-28 03:38:21,155 INFO L231 Difference]: Finished difference. Result has 309 places, 641 transitions, 13234 flow [2024-06-28 03:38:21,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13148, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=13234, PETRI_PLACES=309, PETRI_TRANSITIONS=641} [2024-06-28 03:38:21,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-28 03:38:21,155 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 641 transitions, 13234 flow [2024-06-28 03:38:21,156 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) [2024-06-28 03:38:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:21,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:21,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:38:21,156 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)] === [2024-06-28 03:38:21,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1231162251, now seen corresponding path program 6 times [2024-06-28 03:38:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:21,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077425203] [2024-06-28 03:38:21,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:21,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:21,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077425203] [2024-06-28 03:38:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077425203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:21,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:21,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:38:21,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597544601] [2024-06-28 03:38:21,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:21,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:38:21,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:38:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:38:21,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:21,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 641 transitions, 13234 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:38:21,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:21,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:21,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:24,184 INFO L124 PetriNetUnfolderBase]: 6888/10823 cut-off events. [2024-06-28 03:38:24,184 INFO L125 PetriNetUnfolderBase]: For 543944/543944 co-relation queries the response was YES. [2024-06-28 03:38:24,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89831 conditions, 10823 events. 6888/10823 cut-off events. For 543944/543944 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 71581 event pairs, 2996 based on Foata normal form. 3/10826 useless extension candidates. Maximal degree in co-relation 89693. Up to 10631 conditions per place. [2024-06-28 03:38:24,325 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 636 selfloop transitions, 22 changer transitions 0/661 dead transitions. [2024-06-28 03:38:24,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 661 transitions, 14768 flow [2024-06-28 03:38:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:38:24,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:38:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-28 03:38:24,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2024-06-28 03:38:24,326 INFO L175 Difference]: Start difference. First operand has 309 places, 641 transitions, 13234 flow. Second operand 7 states and 113 transitions. [2024-06-28 03:38:24,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 661 transitions, 14768 flow [2024-06-28 03:38:26,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 661 transitions, 13974 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-28 03:38:26,191 INFO L231 Difference]: Finished difference. Result has 305 places, 647 transitions, 12650 flow [2024-06-28 03:38:26,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12475, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12650, PETRI_PLACES=305, PETRI_TRANSITIONS=647} [2024-06-28 03:38:26,192 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 264 predicate places. [2024-06-28 03:38:26,193 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 647 transitions, 12650 flow [2024-06-28 03:38:26,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:38:26,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:26,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:26,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:38:26,193 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:38:26,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash -114018446, now seen corresponding path program 7 times [2024-06-28 03:38:26,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:26,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847139506] [2024-06-28 03:38:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:26,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:27,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:27,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847139506] [2024-06-28 03:38:27,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847139506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:27,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:27,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:38:27,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297342218] [2024-06-28 03:38:27,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:27,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:38:27,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:27,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:38:27,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:38:27,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:27,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 647 transitions, 12650 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:27,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:27,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:27,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:29,657 INFO L124 PetriNetUnfolderBase]: 7105/11179 cut-off events. [2024-06-28 03:38:29,657 INFO L125 PetriNetUnfolderBase]: For 626308/626325 co-relation queries the response was YES. [2024-06-28 03:38:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92299 conditions, 11179 events. 7105/11179 cut-off events. For 626308/626325 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 74478 event pairs, 2043 based on Foata normal form. 68/11247 useless extension candidates. Maximal degree in co-relation 92162. Up to 9265 conditions per place. [2024-06-28 03:38:29,816 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 492 selfloop transitions, 196 changer transitions 0/691 dead transitions. [2024-06-28 03:38:29,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 691 transitions, 14532 flow [2024-06-28 03:38:29,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-28 03:38:29,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625 [2024-06-28 03:38:29,818 INFO L175 Difference]: Start difference. First operand has 305 places, 647 transitions, 12650 flow. Second operand 8 states and 148 transitions. [2024-06-28 03:38:29,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 691 transitions, 14532 flow [2024-06-28 03:38:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 691 transitions, 14464 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 03:38:31,726 INFO L231 Difference]: Finished difference. Result has 309 places, 654 transitions, 13315 flow [2024-06-28 03:38:31,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12582, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13315, PETRI_PLACES=309, PETRI_TRANSITIONS=654} [2024-06-28 03:38:31,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-28 03:38:31,735 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 654 transitions, 13315 flow [2024-06-28 03:38:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:31,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:31,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:31,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 03:38:31,736 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)] === [2024-06-28 03:38:31,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash 490125676, now seen corresponding path program 8 times [2024-06-28 03:38:31,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:31,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51370840] [2024-06-28 03:38:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:31,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:32,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:32,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51370840] [2024-06-28 03:38:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51370840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:32,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:38:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658933687] [2024-06-28 03:38:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:38:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:38:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:38:32,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:32,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 654 transitions, 13315 flow. Second operand has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:32,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:32,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:35,449 INFO L124 PetriNetUnfolderBase]: 7046/11106 cut-off events. [2024-06-28 03:38:35,449 INFO L125 PetriNetUnfolderBase]: For 576330/576360 co-relation queries the response was YES. [2024-06-28 03:38:35,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91401 conditions, 11106 events. 7046/11106 cut-off events. For 576330/576360 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 74320 event pairs, 2083 based on Foata normal form. 60/11166 useless extension candidates. Maximal degree in co-relation 91263. Up to 9232 conditions per place. [2024-06-28 03:38:35,676 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 495 selfloop transitions, 186 changer transitions 0/684 dead transitions. [2024-06-28 03:38:35,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 684 transitions, 14805 flow [2024-06-28 03:38:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:35,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-28 03:38:35,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-06-28 03:38:35,678 INFO L175 Difference]: Start difference. First operand has 309 places, 654 transitions, 13315 flow. Second operand 8 states and 142 transitions. [2024-06-28 03:38:35,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 684 transitions, 14805 flow [2024-06-28 03:38:37,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 684 transitions, 14209 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-06-28 03:38:37,824 INFO L231 Difference]: Finished difference. Result has 311 places, 654 transitions, 13108 flow [2024-06-28 03:38:37,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12719, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13108, PETRI_PLACES=311, PETRI_TRANSITIONS=654} [2024-06-28 03:38:37,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-28 03:38:37,825 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 654 transitions, 13108 flow [2024-06-28 03:38:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.363636363636363) internal successors, (103), 11 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:37,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:37,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:37,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 03:38:37,826 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)] === [2024-06-28 03:38:37,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:37,826 INFO L85 PathProgramCache]: Analyzing trace with hash 963765410, now seen corresponding path program 9 times [2024-06-28 03:38:37,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:37,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058563303] [2024-06-28 03:38:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:37,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:38,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:38,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058563303] [2024-06-28 03:38:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058563303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:38,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:38,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:38:38,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559307943] [2024-06-28 03:38:38,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:38:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:38,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:38:38,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:38:38,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:38,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 654 transitions, 13108 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:38,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:38,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:38,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:41,324 INFO L124 PetriNetUnfolderBase]: 7000/11038 cut-off events. [2024-06-28 03:38:41,324 INFO L125 PetriNetUnfolderBase]: For 499743/499773 co-relation queries the response was YES. [2024-06-28 03:38:41,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88412 conditions, 11038 events. 7000/11038 cut-off events. For 499743/499773 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 73860 event pairs, 1922 based on Foata normal form. 52/11090 useless extension candidates. Maximal degree in co-relation 88273. Up to 8862 conditions per place. [2024-06-28 03:38:41,481 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 470 selfloop transitions, 212 changer transitions 0/685 dead transitions. [2024-06-28 03:38:41,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 685 transitions, 14612 flow [2024-06-28 03:38:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:38:41,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446875 [2024-06-28 03:38:41,483 INFO L175 Difference]: Start difference. First operand has 311 places, 654 transitions, 13108 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:38:41,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 685 transitions, 14612 flow [2024-06-28 03:38:43,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 685 transitions, 14129 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-28 03:38:43,178 INFO L231 Difference]: Finished difference. Result has 313 places, 654 transitions, 13070 flow [2024-06-28 03:38:43,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12625, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=654, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13070, PETRI_PLACES=313, PETRI_TRANSITIONS=654} [2024-06-28 03:38:43,179 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-28 03:38:43,179 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 654 transitions, 13070 flow [2024-06-28 03:38:43,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:43,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:43,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:43,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 03:38:43,179 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:38:43,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:43,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1248865280, now seen corresponding path program 10 times [2024-06-28 03:38:43,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:43,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795018532] [2024-06-28 03:38:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:43,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:44,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:44,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795018532] [2024-06-28 03:38:44,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795018532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:44,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:44,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:38:44,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790791612] [2024-06-28 03:38:44,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:44,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:38:44,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:38:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:38:44,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:44,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 654 transitions, 13070 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:44,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:44,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:44,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:46,597 INFO L124 PetriNetUnfolderBase]: 6980/10980 cut-off events. [2024-06-28 03:38:46,598 INFO L125 PetriNetUnfolderBase]: For 459002/459004 co-relation queries the response was YES. [2024-06-28 03:38:46,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87360 conditions, 10980 events. 6980/10980 cut-off events. For 459002/459004 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 72864 event pairs, 3034 based on Foata normal form. 12/10992 useless extension candidates. Maximal degree in co-relation 87220. Up to 10674 conditions per place. [2024-06-28 03:38:46,768 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 659 selfloop transitions, 19 changer transitions 0/681 dead transitions. [2024-06-28 03:38:46,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 681 transitions, 14484 flow [2024-06-28 03:38:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:38:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:38:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-28 03:38:46,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-06-28 03:38:46,769 INFO L175 Difference]: Start difference. First operand has 313 places, 654 transitions, 13070 flow. Second operand 8 states and 134 transitions. [2024-06-28 03:38:46,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 681 transitions, 14484 flow [2024-06-28 03:38:48,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 681 transitions, 14002 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-28 03:38:48,266 INFO L231 Difference]: Finished difference. Result has 313 places, 653 transitions, 12558 flow [2024-06-28 03:38:48,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12516, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12558, PETRI_PLACES=313, PETRI_TRANSITIONS=653} [2024-06-28 03:38:48,267 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-28 03:38:48,267 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 653 transitions, 12558 flow [2024-06-28 03:38:48,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:38:48,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:48,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:48,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 03:38:48,268 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)] === [2024-06-28 03:38:48,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:48,268 INFO L85 PathProgramCache]: Analyzing trace with hash -35052427, now seen corresponding path program 7 times [2024-06-28 03:38:48,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:48,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512766076] [2024-06-28 03:38:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:48,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:48,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512766076] [2024-06-28 03:38:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512766076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:48,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:48,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:38:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528110153] [2024-06-28 03:38:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:48,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:38:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:48,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:38:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:38:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:48,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 653 transitions, 12558 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:38:48,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:48,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:48,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:51,385 INFO L124 PetriNetUnfolderBase]: 6971/10988 cut-off events. [2024-06-28 03:38:51,385 INFO L125 PetriNetUnfolderBase]: For 414356/414358 co-relation queries the response was YES. [2024-06-28 03:38:51,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85058 conditions, 10988 events. 6971/10988 cut-off events. For 414356/414358 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 73407 event pairs, 3065 based on Foata normal form. 5/10993 useless extension candidates. Maximal degree in co-relation 84918. Up to 10795 conditions per place. [2024-06-28 03:38:51,535 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 639 selfloop transitions, 22 changer transitions 0/664 dead transitions. [2024-06-28 03:38:51,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 664 transitions, 13932 flow [2024-06-28 03:38:51,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:38:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:38:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-28 03:38:51,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2024-06-28 03:38:51,537 INFO L175 Difference]: Start difference. First operand has 313 places, 653 transitions, 12558 flow. Second operand 7 states and 109 transitions. [2024-06-28 03:38:51,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 664 transitions, 13932 flow [2024-06-28 03:38:53,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 664 transitions, 13653 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-28 03:38:53,011 INFO L231 Difference]: Finished difference. Result has 313 places, 653 transitions, 12331 flow [2024-06-28 03:38:53,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12279, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12331, PETRI_PLACES=313, PETRI_TRANSITIONS=653} [2024-06-28 03:38:53,011 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-28 03:38:53,012 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 653 transitions, 12331 flow [2024-06-28 03:38:53,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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) [2024-06-28 03:38:53,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:53,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:53,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 03:38:53,012 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)] === [2024-06-28 03:38:53,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:53,013 INFO L85 PathProgramCache]: Analyzing trace with hash -40766347, now seen corresponding path program 8 times [2024-06-28 03:38:53,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:53,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197319441] [2024-06-28 03:38:53,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:53,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:53,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:53,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:53,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197319441] [2024-06-28 03:38:53,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197319441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:53,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:53,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:38:53,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540480219] [2024-06-28 03:38:53,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:53,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:38:53,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:53,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:38:53,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:38:53,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:53,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 653 transitions, 12331 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) [2024-06-28 03:38:53,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:53,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:53,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:38:56,228 INFO L124 PetriNetUnfolderBase]: 6947/10955 cut-off events. [2024-06-28 03:38:56,229 INFO L125 PetriNetUnfolderBase]: For 417568/417570 co-relation queries the response was YES. [2024-06-28 03:38:56,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82905 conditions, 10955 events. 6947/10955 cut-off events. For 417568/417570 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 73185 event pairs, 3060 based on Foata normal form. 8/10963 useless extension candidates. Maximal degree in co-relation 82765. Up to 10680 conditions per place. [2024-06-28 03:38:56,349 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 626 selfloop transitions, 39 changer transitions 0/668 dead transitions. [2024-06-28 03:38:56,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 668 transitions, 13764 flow [2024-06-28 03:38:56,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:38:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:38:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-28 03:38:56,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40714285714285714 [2024-06-28 03:38:56,350 INFO L175 Difference]: Start difference. First operand has 313 places, 653 transitions, 12331 flow. Second operand 7 states and 114 transitions. [2024-06-28 03:38:56,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 668 transitions, 13764 flow [2024-06-28 03:38:57,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 668 transitions, 13668 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-28 03:38:57,634 INFO L231 Difference]: Finished difference. Result has 314 places, 653 transitions, 12326 flow [2024-06-28 03:38:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12235, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12326, PETRI_PLACES=314, PETRI_TRANSITIONS=653} [2024-06-28 03:38:57,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-28 03:38:57,635 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 653 transitions, 12326 flow [2024-06-28 03:38:57,635 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) [2024-06-28 03:38:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:38:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:38:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 03:38:57,636 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)] === [2024-06-28 03:38:57,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:38:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 816760467, now seen corresponding path program 7 times [2024-06-28 03:38:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:38:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859839315] [2024-06-28 03:38:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:38:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:38:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:38:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:38:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:38:58,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859839315] [2024-06-28 03:38:58,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859839315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:38:58,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:38:58,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:38:58,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375890513] [2024-06-28 03:38:58,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:38:58,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:38:58,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:38:58,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:38:58,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:38:58,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:38:58,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 653 transitions, 12326 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) [2024-06-28 03:38:58,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:38:58,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:38:58,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:00,792 INFO L124 PetriNetUnfolderBase]: 6961/10975 cut-off events. [2024-06-28 03:39:00,793 INFO L125 PetriNetUnfolderBase]: For 424305/424307 co-relation queries the response was YES. [2024-06-28 03:39:00,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83152 conditions, 10975 events. 6961/10975 cut-off events. For 424305/424307 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 73325 event pairs, 3060 based on Foata normal form. 8/10983 useless extension candidates. Maximal degree in co-relation 83011. Up to 10678 conditions per place. [2024-06-28 03:39:00,945 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 620 selfloop transitions, 51 changer transitions 0/674 dead transitions. [2024-06-28 03:39:00,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 674 transitions, 13866 flow [2024-06-28 03:39:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:39:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:39:00,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-28 03:39:00,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-06-28 03:39:00,947 INFO L175 Difference]: Start difference. First operand has 314 places, 653 transitions, 12326 flow. Second operand 8 states and 129 transitions. [2024-06-28 03:39:00,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 674 transitions, 13866 flow [2024-06-28 03:39:02,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 674 transitions, 13760 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:39:02,550 INFO L231 Difference]: Finished difference. Result has 316 places, 658 transitions, 12449 flow [2024-06-28 03:39:02,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12220, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12449, PETRI_PLACES=316, PETRI_TRANSITIONS=658} [2024-06-28 03:39:02,551 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 275 predicate places. [2024-06-28 03:39:02,551 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 658 transitions, 12449 flow [2024-06-28 03:39:02,551 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) [2024-06-28 03:39:02,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:02,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:02,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 03:39:02,552 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)] === [2024-06-28 03:39:02,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:02,552 INFO L85 PathProgramCache]: Analyzing trace with hash -27871804, now seen corresponding path program 1 times [2024-06-28 03:39:02,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:02,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51601827] [2024-06-28 03:39:02,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:02,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:03,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51601827] [2024-06-28 03:39:03,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51601827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:03,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:03,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:39:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421035120] [2024-06-28 03:39:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:39:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:39:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:39:03,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:03,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 658 transitions, 12449 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) [2024-06-28 03:39:03,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:03,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:03,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:06,347 INFO L124 PetriNetUnfolderBase]: 6969/10987 cut-off events. [2024-06-28 03:39:06,347 INFO L125 PetriNetUnfolderBase]: For 430544/430546 co-relation queries the response was YES. [2024-06-28 03:39:06,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84294 conditions, 10987 events. 6969/10987 cut-off events. For 430544/430546 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 73376 event pairs, 3047 based on Foata normal form. 6/10993 useless extension candidates. Maximal degree in co-relation 84152. Up to 10724 conditions per place. [2024-06-28 03:39:06,558 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 643 selfloop transitions, 34 changer transitions 0/680 dead transitions. [2024-06-28 03:39:06,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 680 transitions, 14183 flow [2024-06-28 03:39:06,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:39:06,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:39:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-28 03:39:06,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396875 [2024-06-28 03:39:06,560 INFO L175 Difference]: Start difference. First operand has 316 places, 658 transitions, 12449 flow. Second operand 8 states and 127 transitions. [2024-06-28 03:39:06,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 680 transitions, 14183 flow [2024-06-28 03:39:08,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 680 transitions, 13983 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-28 03:39:08,653 INFO L231 Difference]: Finished difference. Result has 319 places, 666 transitions, 12557 flow [2024-06-28 03:39:08,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12249, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12557, PETRI_PLACES=319, PETRI_TRANSITIONS=666} [2024-06-28 03:39:08,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-28 03:39:08,654 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 666 transitions, 12557 flow [2024-06-28 03:39:08,655 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) [2024-06-28 03:39:08,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:08,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:08,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 03:39:08,655 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:39:08,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash 333905417, now seen corresponding path program 1 times [2024-06-28 03:39:08,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:08,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586574772] [2024-06-28 03:39:08,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:08,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:09,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:09,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586574772] [2024-06-28 03:39:09,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586574772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:09,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:09,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:39:09,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310394661] [2024-06-28 03:39:09,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:09,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:39:09,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:09,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:39:09,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:39:09,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:09,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 666 transitions, 12557 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) [2024-06-28 03:39:09,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:09,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:09,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:12,381 INFO L124 PetriNetUnfolderBase]: 6998/11050 cut-off events. [2024-06-28 03:39:12,382 INFO L125 PetriNetUnfolderBase]: For 447382/447433 co-relation queries the response was YES. [2024-06-28 03:39:12,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85257 conditions, 11050 events. 6998/11050 cut-off events. For 447382/447433 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 73760 event pairs, 1975 based on Foata normal form. 50/11100 useless extension candidates. Maximal degree in co-relation 85113. Up to 10015 conditions per place. [2024-06-28 03:39:12,629 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 552 selfloop transitions, 167 changer transitions 0/722 dead transitions. [2024-06-28 03:39:12,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 722 transitions, 14766 flow [2024-06-28 03:39:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-28 03:39:12,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4527777777777778 [2024-06-28 03:39:12,631 INFO L175 Difference]: Start difference. First operand has 319 places, 666 transitions, 12557 flow. Second operand 9 states and 163 transitions. [2024-06-28 03:39:12,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 722 transitions, 14766 flow [2024-06-28 03:39:14,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 722 transitions, 14580 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-28 03:39:14,335 INFO L231 Difference]: Finished difference. Result has 326 places, 676 transitions, 12958 flow [2024-06-28 03:39:14,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12371, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12958, PETRI_PLACES=326, PETRI_TRANSITIONS=676} [2024-06-28 03:39:14,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-28 03:39:14,336 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 676 transitions, 12958 flow [2024-06-28 03:39:14,336 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) [2024-06-28 03:39:14,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:14,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:14,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 03:39:14,337 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:39:14,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash 3022367, now seen corresponding path program 2 times [2024-06-28 03:39:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:14,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776880342] [2024-06-28 03:39:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:14,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:14,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776880342] [2024-06-28 03:39:14,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776880342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:14,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:14,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:39:14,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120573499] [2024-06-28 03:39:14,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:14,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:39:14,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:39:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:39:14,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:14,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 676 transitions, 12958 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) [2024-06-28 03:39:14,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:14,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:14,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:17,760 INFO L124 PetriNetUnfolderBase]: 7088/11182 cut-off events. [2024-06-28 03:39:17,760 INFO L125 PetriNetUnfolderBase]: For 475542/475593 co-relation queries the response was YES. [2024-06-28 03:39:17,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87867 conditions, 11182 events. 7088/11182 cut-off events. For 475542/475593 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 75251 event pairs, 2345 based on Foata normal form. 50/11232 useless extension candidates. Maximal degree in co-relation 87720. Up to 10292 conditions per place. [2024-06-28 03:39:17,973 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 558 selfloop transitions, 171 changer transitions 0/732 dead transitions. [2024-06-28 03:39:17,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 732 transitions, 15252 flow [2024-06-28 03:39:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:17,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:39:17,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46111111111111114 [2024-06-28 03:39:17,974 INFO L175 Difference]: Start difference. First operand has 326 places, 676 transitions, 12958 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:39:17,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 732 transitions, 15252 flow [2024-06-28 03:39:19,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 732 transitions, 14788 flow, removed 129 selfloop flow, removed 4 redundant places. [2024-06-28 03:39:19,982 INFO L231 Difference]: Finished difference. Result has 332 places, 689 transitions, 13198 flow [2024-06-28 03:39:19,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12610, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13198, PETRI_PLACES=332, PETRI_TRANSITIONS=689} [2024-06-28 03:39:19,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-28 03:39:19,983 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 689 transitions, 13198 flow [2024-06-28 03:39:19,983 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) [2024-06-28 03:39:19,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:19,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:19,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 03:39:19,985 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:39:19,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:19,985 INFO L85 PathProgramCache]: Analyzing trace with hash 34657557, now seen corresponding path program 1 times [2024-06-28 03:39:19,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:19,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553227904] [2024-06-28 03:39:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:19,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:20,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:20,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553227904] [2024-06-28 03:39:20,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553227904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:20,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:20,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:39:20,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078530856] [2024-06-28 03:39:20,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:20,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:39:20,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:39:20,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:39:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:20,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 689 transitions, 13198 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) [2024-06-28 03:39:20,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:20,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:20,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:23,529 INFO L124 PetriNetUnfolderBase]: 7164/11284 cut-off events. [2024-06-28 03:39:23,529 INFO L125 PetriNetUnfolderBase]: For 485230/485289 co-relation queries the response was YES. [2024-06-28 03:39:23,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88701 conditions, 11284 events. 7164/11284 cut-off events. For 485230/485289 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 75814 event pairs, 2359 based on Foata normal form. 58/11342 useless extension candidates. Maximal degree in co-relation 88551. Up to 9891 conditions per place. [2024-06-28 03:39:23,727 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 483 selfloop transitions, 262 changer transitions 0/748 dead transitions. [2024-06-28 03:39:23,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 748 transitions, 15536 flow [2024-06-28 03:39:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-28 03:39:23,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-28 03:39:23,729 INFO L175 Difference]: Start difference. First operand has 332 places, 689 transitions, 13198 flow. Second operand 9 states and 171 transitions. [2024-06-28 03:39:23,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 748 transitions, 15536 flow [2024-06-28 03:39:25,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 748 transitions, 15397 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-28 03:39:25,922 INFO L231 Difference]: Finished difference. Result has 337 places, 708 transitions, 13964 flow [2024-06-28 03:39:25,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13059, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13964, PETRI_PLACES=337, PETRI_TRANSITIONS=708} [2024-06-28 03:39:25,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-28 03:39:25,923 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 708 transitions, 13964 flow [2024-06-28 03:39:25,923 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) [2024-06-28 03:39:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:25,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 03:39:25,924 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)] === [2024-06-28 03:39:25,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash 33648197, now seen corresponding path program 3 times [2024-06-28 03:39:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:25,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50508428] [2024-06-28 03:39:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:25,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:26,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50508428] [2024-06-28 03:39:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50508428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:26,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:26,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:39:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546759887] [2024-06-28 03:39:26,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:26,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:39:26,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:39:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:39:26,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:26,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 708 transitions, 13964 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) [2024-06-28 03:39:26,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:26,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:26,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:29,485 INFO L124 PetriNetUnfolderBase]: 7154/11270 cut-off events. [2024-06-28 03:39:29,486 INFO L125 PetriNetUnfolderBase]: For 497242/497301 co-relation queries the response was YES. [2024-06-28 03:39:29,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89887 conditions, 11270 events. 7154/11270 cut-off events. For 497242/497301 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 75698 event pairs, 2378 based on Foata normal form. 58/11328 useless extension candidates. Maximal degree in co-relation 89736. Up to 10510 conditions per place. [2024-06-28 03:39:29,687 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 580 selfloop transitions, 163 changer transitions 0/746 dead transitions. [2024-06-28 03:39:29,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 746 transitions, 15843 flow [2024-06-28 03:39:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-28 03:39:29,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-28 03:39:29,690 INFO L175 Difference]: Start difference. First operand has 337 places, 708 transitions, 13964 flow. Second operand 9 states and 160 transitions. [2024-06-28 03:39:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 746 transitions, 15843 flow [2024-06-28 03:39:32,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 746 transitions, 15581 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-28 03:39:32,045 INFO L231 Difference]: Finished difference. Result has 342 places, 709 transitions, 14053 flow [2024-06-28 03:39:32,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13708, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14053, PETRI_PLACES=342, PETRI_TRANSITIONS=709} [2024-06-28 03:39:32,046 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-28 03:39:32,046 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 709 transitions, 14053 flow [2024-06-28 03:39:32,047 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) [2024-06-28 03:39:32,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:32,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:32,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 03:39:32,047 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)] === [2024-06-28 03:39:32,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2122895717, now seen corresponding path program 1 times [2024-06-28 03:39:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:32,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21759121] [2024-06-28 03:39:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21759121] [2024-06-28 03:39:32,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21759121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:32,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:32,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:39:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389896793] [2024-06-28 03:39:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:39:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:39:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:39:32,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:32,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 709 transitions, 14053 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) [2024-06-28 03:39:32,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:32,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:32,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:35,986 INFO L124 PetriNetUnfolderBase]: 7214/11362 cut-off events. [2024-06-28 03:39:35,986 INFO L125 PetriNetUnfolderBase]: For 520744/520774 co-relation queries the response was YES. [2024-06-28 03:39:36,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90087 conditions, 11362 events. 7214/11362 cut-off events. For 520744/520774 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 76526 event pairs, 2444 based on Foata normal form. 42/11404 useless extension candidates. Maximal degree in co-relation 89935. Up to 10678 conditions per place. [2024-06-28 03:39:36,188 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 649 selfloop transitions, 97 changer transitions 0/749 dead transitions. [2024-06-28 03:39:36,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 749 transitions, 15900 flow [2024-06-28 03:39:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-28 03:39:36,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44722222222222224 [2024-06-28 03:39:36,189 INFO L175 Difference]: Start difference. First operand has 342 places, 709 transitions, 14053 flow. Second operand 9 states and 161 transitions. [2024-06-28 03:39:36,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 749 transitions, 15900 flow [2024-06-28 03:39:38,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 749 transitions, 15500 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-28 03:39:38,752 INFO L231 Difference]: Finished difference. Result has 343 places, 713 transitions, 13962 flow [2024-06-28 03:39:38,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13653, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13962, PETRI_PLACES=343, PETRI_TRANSITIONS=713} [2024-06-28 03:39:38,753 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-28 03:39:38,753 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 713 transitions, 13962 flow [2024-06-28 03:39:38,753 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) [2024-06-28 03:39:38,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:38,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:38,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 03:39:38,754 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)] === [2024-06-28 03:39:38,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:38,754 INFO L85 PathProgramCache]: Analyzing trace with hash 2005668477, now seen corresponding path program 2 times [2024-06-28 03:39:38,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:38,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641283109] [2024-06-28 03:39:38,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:38,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:39,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:39,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:39,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641283109] [2024-06-28 03:39:39,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641283109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:39,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:39,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:39:39,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851815108] [2024-06-28 03:39:39,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:39,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:39:39,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:39:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:39:39,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:39,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 713 transitions, 13962 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:39:39,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:39,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:39,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:42,870 INFO L124 PetriNetUnfolderBase]: 7466/11707 cut-off events. [2024-06-28 03:39:42,870 INFO L125 PetriNetUnfolderBase]: For 598719/598749 co-relation queries the response was YES. [2024-06-28 03:39:42,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95320 conditions, 11707 events. 7466/11707 cut-off events. For 598719/598749 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 78667 event pairs, 2498 based on Foata normal form. 42/11749 useless extension candidates. Maximal degree in co-relation 95167. Up to 10313 conditions per place. [2024-06-28 03:39:43,036 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 637 selfloop transitions, 139 changer transitions 0/779 dead transitions. [2024-06-28 03:39:43,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 779 transitions, 16674 flow [2024-06-28 03:39:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:43,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-28 03:39:43,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-06-28 03:39:43,037 INFO L175 Difference]: Start difference. First operand has 343 places, 713 transitions, 13962 flow. Second operand 9 states and 174 transitions. [2024-06-28 03:39:43,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 779 transitions, 16674 flow [2024-06-28 03:39:45,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 779 transitions, 16432 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-28 03:39:45,329 INFO L231 Difference]: Finished difference. Result has 349 places, 732 transitions, 14490 flow [2024-06-28 03:39:45,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=13720, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14490, PETRI_PLACES=349, PETRI_TRANSITIONS=732} [2024-06-28 03:39:45,329 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2024-06-28 03:39:45,329 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 732 transitions, 14490 flow [2024-06-28 03:39:45,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:39:45,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:45,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:45,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 03:39:45,330 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)] === [2024-06-28 03:39:45,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2005507301, now seen corresponding path program 3 times [2024-06-28 03:39:45,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:45,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938793807] [2024-06-28 03:39:45,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:45,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:45,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:45,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938793807] [2024-06-28 03:39:45,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938793807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:45,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:45,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:39:45,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803582918] [2024-06-28 03:39:45,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:45,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:39:45,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:39:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:39:45,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:45,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 732 transitions, 14490 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:39:45,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:45,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:45,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:49,093 INFO L124 PetriNetUnfolderBase]: 7430/11660 cut-off events. [2024-06-28 03:39:49,094 INFO L125 PetriNetUnfolderBase]: For 596975/597005 co-relation queries the response was YES. [2024-06-28 03:39:49,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96268 conditions, 11660 events. 7430/11660 cut-off events. For 596975/597005 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 78369 event pairs, 2473 based on Foata normal form. 42/11702 useless extension candidates. Maximal degree in co-relation 96111. Up to 10297 conditions per place. [2024-06-28 03:39:49,329 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 618 selfloop transitions, 149 changer transitions 0/770 dead transitions. [2024-06-28 03:39:49,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 770 transitions, 16642 flow [2024-06-28 03:39:49,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:39:49,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:39:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:39:49,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-28 03:39:49,330 INFO L175 Difference]: Start difference. First operand has 349 places, 732 transitions, 14490 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:39:49,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 770 transitions, 16642 flow [2024-06-28 03:39:52,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 770 transitions, 16445 flow, removed 91 selfloop flow, removed 2 redundant places. [2024-06-28 03:39:52,507 INFO L231 Difference]: Finished difference. Result has 356 places, 732 transitions, 14600 flow [2024-06-28 03:39:52,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14293, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14600, PETRI_PLACES=356, PETRI_TRANSITIONS=732} [2024-06-28 03:39:52,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-28 03:39:52,508 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 732 transitions, 14600 flow [2024-06-28 03:39:52,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:39:52,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:39:52,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:39:52,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 03:39:52,509 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)] === [2024-06-28 03:39:52,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:39:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash 243800345, now seen corresponding path program 4 times [2024-06-28 03:39:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:39:52,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919915798] [2024-06-28 03:39:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:39:52,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:39:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:39:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:39:53,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:39:53,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919915798] [2024-06-28 03:39:53,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919915798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:39:53,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:39:53,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:39:53,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738197314] [2024-06-28 03:39:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:39:53,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:39:53,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:39:53,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:39:53,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:39:53,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:39:53,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 732 transitions, 14600 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:39:53,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:39:53,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:39:53,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:39:56,815 INFO L124 PetriNetUnfolderBase]: 7660/12011 cut-off events. [2024-06-28 03:39:56,816 INFO L125 PetriNetUnfolderBase]: For 646725/646742 co-relation queries the response was YES. [2024-06-28 03:39:56,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100449 conditions, 12011 events. 7660/12011 cut-off events. For 646725/646742 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 81106 event pairs, 2649 based on Foata normal form. 20/12031 useless extension candidates. Maximal degree in co-relation 100289. Up to 10945 conditions per place. [2024-06-28 03:39:57,011 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 608 selfloop transitions, 184 changer transitions 0/795 dead transitions. [2024-06-28 03:39:57,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 795 transitions, 16833 flow [2024-06-28 03:39:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:39:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:39:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 03:39:57,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725 [2024-06-28 03:39:57,012 INFO L175 Difference]: Start difference. First operand has 356 places, 732 transitions, 14600 flow. Second operand 10 states and 189 transitions. [2024-06-28 03:39:57,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 795 transitions, 16833 flow [2024-06-28 03:40:00,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 795 transitions, 16575 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-28 03:40:00,400 INFO L231 Difference]: Finished difference. Result has 361 places, 754 transitions, 15106 flow [2024-06-28 03:40:00,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14342, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15106, PETRI_PLACES=361, PETRI_TRANSITIONS=754} [2024-06-28 03:40:00,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-28 03:40:00,401 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 754 transitions, 15106 flow [2024-06-28 03:40:00,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:00,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:00,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:00,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 03:40:00,402 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)] === [2024-06-28 03:40:00,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:00,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1887457975, now seen corresponding path program 2 times [2024-06-28 03:40:00,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:00,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701448114] [2024-06-28 03:40:00,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:00,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:01,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:01,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701448114] [2024-06-28 03:40:01,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701448114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:01,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:01,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:40:01,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864349473] [2024-06-28 03:40:01,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:01,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:40:01,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:01,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:40:01,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:40:01,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:01,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 754 transitions, 15106 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) [2024-06-28 03:40:01,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:01,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:01,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:04,648 INFO L124 PetriNetUnfolderBase]: 7752/12139 cut-off events. [2024-06-28 03:40:04,648 INFO L125 PetriNetUnfolderBase]: For 676458/676475 co-relation queries the response was YES. [2024-06-28 03:40:04,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102467 conditions, 12139 events. 7752/12139 cut-off events. For 676458/676475 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 81862 event pairs, 2651 based on Foata normal form. 20/12159 useless extension candidates. Maximal degree in co-relation 102305. Up to 11100 conditions per place. [2024-06-28 03:40:04,856 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 593 selfloop transitions, 209 changer transitions 0/805 dead transitions. [2024-06-28 03:40:04,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 805 transitions, 17407 flow [2024-06-28 03:40:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:40:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:40:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 03:40:04,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.465 [2024-06-28 03:40:04,857 INFO L175 Difference]: Start difference. First operand has 361 places, 754 transitions, 15106 flow. Second operand 10 states and 186 transitions. [2024-06-28 03:40:04,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 805 transitions, 17407 flow [2024-06-28 03:40:09,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 805 transitions, 17165 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:40:09,290 INFO L231 Difference]: Finished difference. Result has 365 places, 770 transitions, 15598 flow [2024-06-28 03:40:09,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=14864, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=754, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15598, PETRI_PLACES=365, PETRI_TRANSITIONS=770} [2024-06-28 03:40:09,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 324 predicate places. [2024-06-28 03:40:09,290 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 770 transitions, 15598 flow [2024-06-28 03:40:09,291 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) [2024-06-28 03:40:09,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:09,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:09,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 03:40:09,291 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)] === [2024-06-28 03:40:09,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:09,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1887457665, now seen corresponding path program 5 times [2024-06-28 03:40:09,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:09,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752972888] [2024-06-28 03:40:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:09,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:10,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:10,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752972888] [2024-06-28 03:40:10,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752972888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:10,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:10,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:40:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919597443] [2024-06-28 03:40:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:10,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:40:10,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:40:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:40:10,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:10,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 770 transitions, 15598 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:10,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:10,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:10,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:14,344 INFO L124 PetriNetUnfolderBase]: 7784/12187 cut-off events. [2024-06-28 03:40:14,344 INFO L125 PetriNetUnfolderBase]: For 691689/691706 co-relation queries the response was YES. [2024-06-28 03:40:14,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103678 conditions, 12187 events. 7784/12187 cut-off events. For 691689/691706 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 82233 event pairs, 2694 based on Foata normal form. 20/12207 useless extension candidates. Maximal degree in co-relation 103514. Up to 11415 conditions per place. [2024-06-28 03:40:14,617 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 637 selfloop transitions, 167 changer transitions 0/807 dead transitions. [2024-06-28 03:40:14,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 807 transitions, 17424 flow [2024-06-28 03:40:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:40:14,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:40:14,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:40:14,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-28 03:40:14,618 INFO L175 Difference]: Start difference. First operand has 365 places, 770 transitions, 15598 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:40:14,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 807 transitions, 17424 flow [2024-06-28 03:40:17,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 807 transitions, 17159 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-28 03:40:17,156 INFO L231 Difference]: Finished difference. Result has 371 places, 776 transitions, 15788 flow [2024-06-28 03:40:17,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15333, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15788, PETRI_PLACES=371, PETRI_TRANSITIONS=776} [2024-06-28 03:40:17,157 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-28 03:40:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 776 transitions, 15788 flow [2024-06-28 03:40:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:17,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:17,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 03:40:17,158 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)] === [2024-06-28 03:40:17,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1895789535, now seen corresponding path program 6 times [2024-06-28 03:40:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588181483] [2024-06-28 03:40:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:17,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588181483] [2024-06-28 03:40:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588181483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:18,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:40:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934472740] [2024-06-28 03:40:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:40:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:40:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:40:18,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:18,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 776 transitions, 15788 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:18,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:18,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:18,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:22,359 INFO L124 PetriNetUnfolderBase]: 7928/12407 cut-off events. [2024-06-28 03:40:22,360 INFO L125 PetriNetUnfolderBase]: For 800346/800363 co-relation queries the response was YES. [2024-06-28 03:40:22,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106344 conditions, 12407 events. 7928/12407 cut-off events. For 800346/800363 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 83884 event pairs, 2724 based on Foata normal form. 56/12463 useless extension candidates. Maximal degree in co-relation 106178. Up to 11543 conditions per place. [2024-06-28 03:40:22,693 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 666 selfloop transitions, 149 changer transitions 0/818 dead transitions. [2024-06-28 03:40:22,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 818 transitions, 17832 flow [2024-06-28 03:40:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:40:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:40:22,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-28 03:40:22,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525 [2024-06-28 03:40:22,695 INFO L175 Difference]: Start difference. First operand has 371 places, 776 transitions, 15788 flow. Second operand 10 states and 181 transitions. [2024-06-28 03:40:22,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 818 transitions, 17832 flow [2024-06-28 03:40:26,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 818 transitions, 17516 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-28 03:40:26,154 INFO L231 Difference]: Finished difference. Result has 374 places, 783 transitions, 16004 flow [2024-06-28 03:40:26,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15472, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16004, PETRI_PLACES=374, PETRI_TRANSITIONS=783} [2024-06-28 03:40:26,155 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2024-06-28 03:40:26,155 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 783 transitions, 16004 flow [2024-06-28 03:40:26,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:26,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:26,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 03:40:26,156 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)] === [2024-06-28 03:40:26,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1632018969, now seen corresponding path program 3 times [2024-06-28 03:40:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:26,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029634242] [2024-06-28 03:40:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:27,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:27,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029634242] [2024-06-28 03:40:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029634242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:27,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:27,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:40:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166315833] [2024-06-28 03:40:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:40:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:40:27,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:40:27,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:27,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 783 transitions, 16004 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) [2024-06-28 03:40:27,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:27,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:27,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:31,005 INFO L124 PetriNetUnfolderBase]: 7948/12435 cut-off events. [2024-06-28 03:40:31,006 INFO L125 PetriNetUnfolderBase]: For 735604/735621 co-relation queries the response was YES. [2024-06-28 03:40:31,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107264 conditions, 12435 events. 7948/12435 cut-off events. For 735604/735621 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 84158 event pairs, 2714 based on Foata normal form. 20/12455 useless extension candidates. Maximal degree in co-relation 107097. Up to 11577 conditions per place. [2024-06-28 03:40:31,181 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 645 selfloop transitions, 170 changer transitions 0/818 dead transitions. [2024-06-28 03:40:31,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 818 transitions, 17862 flow [2024-06-28 03:40:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:40:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:40:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-28 03:40:31,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4475 [2024-06-28 03:40:31,183 INFO L175 Difference]: Start difference. First operand has 374 places, 783 transitions, 16004 flow. Second operand 10 states and 179 transitions. [2024-06-28 03:40:31,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 818 transitions, 17862 flow [2024-06-28 03:40:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 818 transitions, 17496 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-28 03:40:34,874 INFO L231 Difference]: Finished difference. Result has 376 places, 787 transitions, 16094 flow [2024-06-28 03:40:34,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15638, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16094, PETRI_PLACES=376, PETRI_TRANSITIONS=787} [2024-06-28 03:40:34,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-28 03:40:34,875 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 787 transitions, 16094 flow [2024-06-28 03:40:34,875 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) [2024-06-28 03:40:34,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:34,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:34,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 03:40:34,876 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)] === [2024-06-28 03:40:34,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2025565987, now seen corresponding path program 7 times [2024-06-28 03:40:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:34,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092591024] [2024-06-28 03:40:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:36,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:36,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092591024] [2024-06-28 03:40:36,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092591024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:36,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:36,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:40:36,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516988610] [2024-06-28 03:40:36,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:36,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:40:36,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:40:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:40:36,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:36,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 787 transitions, 16094 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:36,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:36,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:36,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:40,348 INFO L124 PetriNetUnfolderBase]: 7948/12446 cut-off events. [2024-06-28 03:40:40,348 INFO L125 PetriNetUnfolderBase]: For 781430/781460 co-relation queries the response was YES. [2024-06-28 03:40:40,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105704 conditions, 12446 events. 7948/12446 cut-off events. For 781430/781460 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 84219 event pairs, 2682 based on Foata normal form. 70/12516 useless extension candidates. Maximal degree in co-relation 105536. Up to 11629 conditions per place. [2024-06-28 03:40:40,535 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 684 selfloop transitions, 133 changer transitions 0/820 dead transitions. [2024-06-28 03:40:40,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 820 transitions, 18007 flow [2024-06-28 03:40:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:40:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:40:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-28 03:40:40,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-28 03:40:40,537 INFO L175 Difference]: Start difference. First operand has 376 places, 787 transitions, 16094 flow. Second operand 10 states and 174 transitions. [2024-06-28 03:40:40,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 820 transitions, 18007 flow [2024-06-28 03:40:44,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 820 transitions, 17565 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-28 03:40:44,485 INFO L231 Difference]: Finished difference. Result has 378 places, 790 transitions, 16029 flow [2024-06-28 03:40:44,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15652, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16029, PETRI_PLACES=378, PETRI_TRANSITIONS=790} [2024-06-28 03:40:44,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 337 predicate places. [2024-06-28 03:40:44,486 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 790 transitions, 16029 flow [2024-06-28 03:40:44,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:44,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:44,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:44,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 03:40:44,487 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)] === [2024-06-28 03:40:44,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1319640123, now seen corresponding path program 4 times [2024-06-28 03:40:44,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:44,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150451106] [2024-06-28 03:40:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:45,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150451106] [2024-06-28 03:40:45,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150451106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:45,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:45,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:40:45,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529108673] [2024-06-28 03:40:45,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:45,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:40:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:40:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:40:45,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:45,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 790 transitions, 16029 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) [2024-06-28 03:40:45,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:45,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:45,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:40:49,566 INFO L124 PetriNetUnfolderBase]: 7956/12457 cut-off events. [2024-06-28 03:40:49,567 INFO L125 PetriNetUnfolderBase]: For 694052/694082 co-relation queries the response was YES. [2024-06-28 03:40:49,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105641 conditions, 12457 events. 7956/12457 cut-off events. For 694052/694082 co-relation queries the response was YES. Maximal size of possible extension queue 783. Compared 84456 event pairs, 2672 based on Foata normal form. 34/12491 useless extension candidates. Maximal degree in co-relation 105472. Up to 11611 conditions per place. [2024-06-28 03:40:49,761 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 661 selfloop transitions, 158 changer transitions 0/822 dead transitions. [2024-06-28 03:40:49,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 822 transitions, 17877 flow [2024-06-28 03:40:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:40:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:40:49,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 03:40:49,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42272727272727273 [2024-06-28 03:40:49,763 INFO L175 Difference]: Start difference. First operand has 378 places, 790 transitions, 16029 flow. Second operand 11 states and 186 transitions. [2024-06-28 03:40:49,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 822 transitions, 17877 flow [2024-06-28 03:40:53,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 822 transitions, 17537 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 03:40:53,393 INFO L231 Difference]: Finished difference. Result has 382 places, 795 transitions, 16146 flow [2024-06-28 03:40:53,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=15696, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=636, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16146, PETRI_PLACES=382, PETRI_TRANSITIONS=795} [2024-06-28 03:40:53,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-28 03:40:53,394 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 795 transitions, 16146 flow [2024-06-28 03:40:53,394 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) [2024-06-28 03:40:53,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:40:53,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:40:53,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 03:40:53,394 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)] === [2024-06-28 03:40:53,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:40:53,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1320009209, now seen corresponding path program 1 times [2024-06-28 03:40:53,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:40:53,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404674277] [2024-06-28 03:40:53,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:40:53,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:40:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:40:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:40:54,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:40:54,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404674277] [2024-06-28 03:40:54,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404674277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:40:54,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:40:54,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:40:54,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596056795] [2024-06-28 03:40:54,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:40:54,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:40:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:40:54,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:40:54,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:40:54,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-06-28 03:40:54,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 795 transitions, 16146 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:40:54,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:40:54,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-06-28 03:40:54,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand