./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:17:37,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:17:37,820 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:17:37,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:17:37,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:17:37,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:17:37,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:17:37,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:17:37,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:17:37,844 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:17:37,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:17:37,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:17:37,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:17:37,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:17:37,846 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:17:37,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:17:37,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:17:37,847 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:17:37,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:17:37,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:17:37,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:17:37,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:17:37,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:17:37,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:17:37,849 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:17:37,850 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:17:37,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:17:37,850 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:17:37,851 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:17:37,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:17:37,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:17:37,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:17:37,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:17:37,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:17:37,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:17:37,852 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:17:37,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:17:37,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:17:37,853 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:17:37,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:17:37,854 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:17:37,854 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:17:37,854 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:17:37,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:17:38,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:17:38,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:17:38,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:17:38,062 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:17:38,063 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:17:38,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:17:38,218 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:17:38,219 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:17:38,219 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:17:39,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:17:39,380 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:17:39,380 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:17:39,407 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0e0ec83/33174acbbc744f8dac7666bc6d82f750/FLAG0a076e472 [2024-06-04 16:17:39,429 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e0e0ec83/33174acbbc744f8dac7666bc6d82f750 [2024-06-04 16:17:39,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:17:39,430 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:17:39,431 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:17:39,431 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:17:39,447 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:17:39,448 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:17:38" (1/2) ... [2024-06-04 16:17:39,449 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e384efc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:17:39, skipping insertion in model container [2024-06-04 16:17:39,449 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:17:38" (1/2) ... [2024-06-04 16:17:39,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59744277 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:17:39, skipping insertion in model container [2024-06-04 16:17:39,450 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:17:39" (2/2) ... [2024-06-04 16:17:39,450 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e384efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:39, skipping insertion in model container [2024-06-04 16:17:39,450 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:17:39" (2/2) ... [2024-06-04 16:17:39,450 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:17:39,513 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:17:39,514 INFO L97 edCorrectnessWitness]: Location invariant before [L808-L808] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-04 16:17:39,514 INFO L97 edCorrectnessWitness]: Location invariant before [L803-L803] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-04 16:17:39,515 INFO L97 edCorrectnessWitness]: Location invariant before [L805-L805] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-04 16:17:39,516 INFO L97 edCorrectnessWitness]: Location invariant before [L807-L807] ((((((((((! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p3_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )a >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )a >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p3_EAX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )a >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p3_EAX + (long long )z >= 0LL) && (long long )a + (long long )main$tmp_guard1 >= 0LL) && (long long )a + (long long )x >= 0LL) && (long long )a + (long long )y >= 0LL) && (long long )a + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p3_EAX) - (long long )x >= 0LL) && (1LL + (long long )a) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p3_EAX) && 0 <= a) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p3_EAX <= 1) && a <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1))) [2024-06-04 16:17:39,516 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:17:39,517 INFO L106 edCorrectnessWitness]: ghost_update [L801-L801] multithreaded = 1; [2024-06-04 16:17:39,557 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:17:39,822 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:17:39,834 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:17:39,990 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:17:40,030 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:17:40,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40 WrapperNode [2024-06-04 16:17:40,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:17:40,031 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:17:40,031 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:17:40,032 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:17:40,038 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,087 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2024-06-04 16:17:40,087 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:17:40,088 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:17:40,088 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:17:40,088 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:17:40,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,103 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,110 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,129 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]. [2024-06-04 16:17:40,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,156 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,159 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:17:40,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:17:40,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:17:40,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:17:40,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (1/1) ... [2024-06-04 16:17:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:17:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:17:40,301 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) [2024-06-04 16:17:40,326 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 [2024-06-04 16:17:40,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:17:40,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:17:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:17:40,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:17:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:17:40,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:17:40,342 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:17:40,342 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:17:40,343 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 16:17:40,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 16:17:40,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:17:40,343 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:17:40,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:17:40,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:17:40,345 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:17:40,457 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:17:40,459 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:17:40,960 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:17:40,960 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:17:41,096 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:17:41,096 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:17:41,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:17:41 BoogieIcfgContainer [2024-06-04 16:17:41,097 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:17:41,100 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:17:41,100 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:17:41,103 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:17:41,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:17:38" (1/4) ... [2024-06-04 16:17:41,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acb7b59 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:17:41, skipping insertion in model container [2024-06-04 16:17:41,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:17:39" (2/4) ... [2024-06-04 16:17:41,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acb7b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:17:41, skipping insertion in model container [2024-06-04 16:17:41,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:17:40" (3/4) ... [2024-06-04 16:17:41,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4acb7b59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:17:41, skipping insertion in model container [2024-06-04 16:17:41,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:17:41" (4/4) ... [2024-06-04 16:17:41,107 INFO L112 eAbstractionObserver]: Analyzing ICFG thin002_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:17:41,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:17:41,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 16:17:41,129 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:17:41,191 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:17:41,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 16:17:41,253 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-04 16:17:41,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:17:41,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:17:41,255 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-04 16:17:41,260 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-04 16:17:41,273 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:17:41,279 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;@6a6b14bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:17:41,279 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 16:17:41,283 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:17:41,283 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:17:41,283 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:17:41,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:41,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:17:41,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:41,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:41,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1238650552, now seen corresponding path program 1 times [2024-06-04 16:17:41,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:41,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704605679] [2024-06-04 16:17:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:42,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:42,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704605679] [2024-06-04 16:17:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704605679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:42,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:42,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:17:42,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366371443] [2024-06-04 16:17:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:42,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:17:42,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:17:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:17:42,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 52 [2024-06-04 16:17:42,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:42,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:42,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 52 [2024-06-04 16:17:42,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:42,751 INFO L124 PetriNetUnfolderBase]: 2723/4078 cut-off events. [2024-06-04 16:17:42,751 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-06-04 16:17:42,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8080 conditions, 4078 events. 2723/4078 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22549 event pairs, 1898 based on Foata normal form. 1/3992 useless extension candidates. Maximal degree in co-relation 8064. Up to 3813 conditions per place. [2024-06-04 16:17:42,777 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 39 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-04 16:17:42,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 221 flow [2024-06-04 16:17:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:17:42,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:17:42,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-06-04 16:17:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6923076923076923 [2024-06-04 16:17:42,789 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 108 transitions. [2024-06-04 16:17:42,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 221 flow [2024-06-04 16:17:42,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 214 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:42,796 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-04 16:17:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-04 16:17:42,800 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-04 16:17:42,800 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-04 16:17:42,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:42,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:42,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:42,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:17:42,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:42,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1721547629, now seen corresponding path program 1 times [2024-06-04 16:17:42,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:42,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426204281] [2024-06-04 16:17:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:42,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:43,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426204281] [2024-06-04 16:17:43,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426204281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:43,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:43,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:17:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112013100] [2024-06-04 16:17:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:17:43,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:17:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:17:43,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:43,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:43,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:43,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:43,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:44,122 INFO L124 PetriNetUnfolderBase]: 4389/6482 cut-off events. [2024-06-04 16:17:44,122 INFO L125 PetriNetUnfolderBase]: For 1055/1077 co-relation queries the response was YES. [2024-06-04 16:17:44,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14774 conditions, 6482 events. 4389/6482 cut-off events. For 1055/1077 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36434 event pairs, 2308 based on Foata normal form. 10/6482 useless extension candidates. Maximal degree in co-relation 14759. Up to 6039 conditions per place. [2024-06-04 16:17:44,156 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 56 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-06-04 16:17:44,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 344 flow [2024-06-04 16:17:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:17:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:17:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-04 16:17:44,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-04 16:17:44,161 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 137 transitions. [2024-06-04 16:17:44,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 344 flow [2024-06-04 16:17:44,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 75 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:17:44,164 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 202 flow [2024-06-04 16:17:44,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-04 16:17:44,165 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2024-06-04 16:17:44,166 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 202 flow [2024-06-04 16:17:44,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:44,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:44,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:44,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:17:44,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:44,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:44,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1846111926, now seen corresponding path program 1 times [2024-06-04 16:17:44,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:44,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843506143] [2024-06-04 16:17:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:44,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:44,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:44,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843506143] [2024-06-04 16:17:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843506143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:44,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:44,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:17:44,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748190585] [2024-06-04 16:17:44,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:44,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:17:44,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:17:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:17:44,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:44,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:44,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:44,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:45,371 INFO L124 PetriNetUnfolderBase]: 4373/6454 cut-off events. [2024-06-04 16:17:45,371 INFO L125 PetriNetUnfolderBase]: For 3049/3136 co-relation queries the response was YES. [2024-06-04 16:17:45,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16582 conditions, 6454 events. 4373/6454 cut-off events. For 3049/3136 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36274 event pairs, 1831 based on Foata normal form. 32/6476 useless extension candidates. Maximal degree in co-relation 16564. Up to 5973 conditions per place. [2024-06-04 16:17:45,404 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 63 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-06-04 16:17:45,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 436 flow [2024-06-04 16:17:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:17:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:17:45,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-04 16:17:45,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 16:17:45,406 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 202 flow. Second operand 5 states and 165 transitions. [2024-06-04 16:17:45,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 436 flow [2024-06-04 16:17:45,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:17:45,410 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 248 flow [2024-06-04 16:17:45,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-04 16:17:45,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-04 16:17:45,411 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 248 flow [2024-06-04 16:17:45,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:45,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:45,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:45,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:17:45,411 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:45,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1305937115, now seen corresponding path program 1 times [2024-06-04 16:17:45,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:45,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142800494] [2024-06-04 16:17:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:45,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:45,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142800494] [2024-06-04 16:17:45,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142800494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:45,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:45,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:17:45,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587839755] [2024-06-04 16:17:45,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:45,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:17:45,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:45,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:17:45,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:17:46,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:46,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:46,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:46,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:46,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:46,662 INFO L124 PetriNetUnfolderBase]: 4310/6335 cut-off events. [2024-06-04 16:17:46,663 INFO L125 PetriNetUnfolderBase]: For 5513/5523 co-relation queries the response was YES. [2024-06-04 16:17:46,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17800 conditions, 6335 events. 4310/6335 cut-off events. For 5513/5523 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 35990 event pairs, 2266 based on Foata normal form. 6/6330 useless extension candidates. Maximal degree in co-relation 17779. Up to 5934 conditions per place. [2024-06-04 16:17:46,692 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 63 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2024-06-04 16:17:46,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 500 flow [2024-06-04 16:17:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:17:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:17:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 16:17:46,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 16:17:46,693 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 248 flow. Second operand 4 states and 132 transitions. [2024-06-04 16:17:46,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 500 flow [2024-06-04 16:17:46,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 464 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:46,697 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 325 flow [2024-06-04 16:17:46,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=325, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 16:17:46,698 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-06-04 16:17:46,698 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 325 flow [2024-06-04 16:17:46,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:46,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:46,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:46,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:17:46,699 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:46,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1413391936, now seen corresponding path program 1 times [2024-06-04 16:17:46,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:46,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878822905] [2024-06-04 16:17:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:46,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:47,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:47,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878822905] [2024-06-04 16:17:47,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878822905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:47,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:47,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:17:47,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169957302] [2024-06-04 16:17:47,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:17:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:47,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:17:47,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:17:47,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:47,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 325 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:47,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:47,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:47,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:48,118 INFO L124 PetriNetUnfolderBase]: 5207/7677 cut-off events. [2024-06-04 16:17:48,121 INFO L125 PetriNetUnfolderBase]: For 11031/11297 co-relation queries the response was YES. [2024-06-04 16:17:48,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23683 conditions, 7677 events. 5207/7677 cut-off events. For 11031/11297 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44253 event pairs, 2250 based on Foata normal form. 57/7672 useless extension candidates. Maximal degree in co-relation 23660. Up to 7050 conditions per place. [2024-06-04 16:17:48,167 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 68 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-04 16:17:48,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 665 flow [2024-06-04 16:17:48,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:17:48,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:17:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-06-04 16:17:48,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-04 16:17:48,172 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 325 flow. Second operand 5 states and 169 transitions. [2024-06-04 16:17:48,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 665 flow [2024-06-04 16:17:48,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 105 transitions, 657 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-04 16:17:48,184 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 438 flow [2024-06-04 16:17:48,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=438, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-06-04 16:17:48,186 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 14 predicate places. [2024-06-04 16:17:48,186 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 438 flow [2024-06-04 16:17:48,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:48,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:48,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:17:48,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:48,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1402172416, now seen corresponding path program 2 times [2024-06-04 16:17:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292880586] [2024-06-04 16:17:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:48,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:48,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:48,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292880586] [2024-06-04 16:17:48,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292880586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:48,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:48,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:17:48,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811808959] [2024-06-04 16:17:48,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:48,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:17:48,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:17:48,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:17:48,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:48,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 438 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:48,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:48,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:49,616 INFO L124 PetriNetUnfolderBase]: 5198/7665 cut-off events. [2024-06-04 16:17:49,617 INFO L125 PetriNetUnfolderBase]: For 17236/17544 co-relation queries the response was YES. [2024-06-04 16:17:49,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 7665 events. 5198/7665 cut-off events. For 17236/17544 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 44041 event pairs, 2250 based on Foata normal form. 65/7670 useless extension candidates. Maximal degree in co-relation 25995. Up to 7056 conditions per place. [2024-06-04 16:17:49,664 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 62 selfloop transitions, 21 changer transitions 0/95 dead transitions. [2024-06-04 16:17:49,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 658 flow [2024-06-04 16:17:49,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:17:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:17:49,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-04 16:17:49,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6586538461538461 [2024-06-04 16:17:49,665 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 438 flow. Second operand 4 states and 137 transitions. [2024-06-04 16:17:49,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 658 flow [2024-06-04 16:17:49,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 95 transitions, 615 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-04 16:17:49,680 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 455 flow [2024-06-04 16:17:49,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=455, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-06-04 16:17:49,682 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-04 16:17:49,682 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 455 flow [2024-06-04 16:17:49,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:49,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:49,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:49,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:17:49,683 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:49,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:49,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1343067912, now seen corresponding path program 1 times [2024-06-04 16:17:49,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:49,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688857727] [2024-06-04 16:17:49,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:49,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:50,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688857727] [2024-06-04 16:17:50,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688857727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:50,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:50,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:17:50,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699326561] [2024-06-04 16:17:50,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:50,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:17:50,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:50,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:17:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:17:50,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:50,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 455 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:50,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:50,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:50,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:50,962 INFO L124 PetriNetUnfolderBase]: 4317/6351 cut-off events. [2024-06-04 16:17:50,966 INFO L125 PetriNetUnfolderBase]: For 15941/15980 co-relation queries the response was YES. [2024-06-04 16:17:50,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 6351 events. 4317/6351 cut-off events. For 15941/15980 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36181 event pairs, 2074 based on Foata normal form. 19/6357 useless extension candidates. Maximal degree in co-relation 21995. Up to 5913 conditions per place. [2024-06-04 16:17:50,998 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 79 selfloop transitions, 14 changer transitions 0/103 dead transitions. [2024-06-04 16:17:50,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 732 flow [2024-06-04 16:17:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:17:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:17:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-04 16:17:51,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6192307692307693 [2024-06-04 16:17:51,000 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 455 flow. Second operand 5 states and 161 transitions. [2024-06-04 16:17:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 732 flow [2024-06-04 16:17:51,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:51,009 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 479 flow [2024-06-04 16:17:51,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=479, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-04 16:17:51,009 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-04 16:17:51,009 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 479 flow [2024-06-04 16:17:51,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:51,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:51,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:51,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:17:51,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:51,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:51,011 INFO L85 PathProgramCache]: Analyzing trace with hash 152893862, now seen corresponding path program 1 times [2024-06-04 16:17:51,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:51,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186610436] [2024-06-04 16:17:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:51,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:51,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:51,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:51,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186610436] [2024-06-04 16:17:51,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186610436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:51,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:51,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:51,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030373111] [2024-06-04 16:17:51,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:51,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:51,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:51,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:51,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:51,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:17:51,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:51,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:51,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:17:51,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:52,545 INFO L124 PetriNetUnfolderBase]: 5487/8006 cut-off events. [2024-06-04 16:17:52,546 INFO L125 PetriNetUnfolderBase]: For 24508/24685 co-relation queries the response was YES. [2024-06-04 16:17:52,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28818 conditions, 8006 events. 5487/8006 cut-off events. For 24508/24685 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45276 event pairs, 2358 based on Foata normal form. 40/8021 useless extension candidates. Maximal degree in co-relation 28789. Up to 7366 conditions per place. [2024-06-04 16:17:52,595 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 98 selfloop transitions, 27 changer transitions 0/134 dead transitions. [2024-06-04 16:17:52,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 134 transitions, 999 flow [2024-06-04 16:17:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:17:52,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:17:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-04 16:17:52,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 16:17:52,597 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 479 flow. Second operand 6 states and 195 transitions. [2024-06-04 16:17:52,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 134 transitions, 999 flow [2024-06-04 16:17:52,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 134 transitions, 959 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:17:52,613 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 667 flow [2024-06-04 16:17:52,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2024-06-04 16:17:52,613 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 24 predicate places. [2024-06-04 16:17:52,614 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 667 flow [2024-06-04 16:17:52,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:52,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:52,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:52,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:17:52,615 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:52,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -517664846, now seen corresponding path program 2 times [2024-06-04 16:17:52,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:52,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714775441] [2024-06-04 16:17:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:52,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:53,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714775441] [2024-06-04 16:17:53,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714775441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:53,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416678641] [2024-06-04 16:17:53,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:53,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:53,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:53,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:53,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:53,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:17:53,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 667 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:53,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:53,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:17:53,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:54,154 INFO L124 PetriNetUnfolderBase]: 5509/8052 cut-off events. [2024-06-04 16:17:54,155 INFO L125 PetriNetUnfolderBase]: For 32038/32364 co-relation queries the response was YES. [2024-06-04 16:17:54,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31089 conditions, 8052 events. 5509/8052 cut-off events. For 32038/32364 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 45539 event pairs, 2336 based on Foata normal form. 81/8115 useless extension candidates. Maximal degree in co-relation 31057. Up to 7419 conditions per place. [2024-06-04 16:17:54,202 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 112 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-04 16:17:54,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 147 transitions, 1168 flow [2024-06-04 16:17:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 16:17:54,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-04 16:17:54,204 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 667 flow. Second operand 7 states and 222 transitions. [2024-06-04 16:17:54,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 147 transitions, 1168 flow [2024-06-04 16:17:54,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 147 transitions, 1114 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-04 16:17:54,226 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 743 flow [2024-06-04 16:17:54,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=743, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-04 16:17:54,226 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-04 16:17:54,227 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 743 flow [2024-06-04 16:17:54,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:54,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:54,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:54,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:17:54,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -517670426, now seen corresponding path program 3 times [2024-06-04 16:17:54,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:54,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027896840] [2024-06-04 16:17:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:54,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:54,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:54,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027896840] [2024-06-04 16:17:54,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027896840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:54,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101405658] [2024-06-04 16:17:54,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:54,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:54,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:54,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:54,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:17:54,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 743 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:54,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:54,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:17:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:55,696 INFO L124 PetriNetUnfolderBase]: 5500/8032 cut-off events. [2024-06-04 16:17:55,696 INFO L125 PetriNetUnfolderBase]: For 36452/36703 co-relation queries the response was YES. [2024-06-04 16:17:55,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31394 conditions, 8032 events. 5500/8032 cut-off events. For 36452/36703 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 45396 event pairs, 2358 based on Foata normal form. 65/8072 useless extension candidates. Maximal degree in co-relation 31360. Up to 7410 conditions per place. [2024-06-04 16:17:55,740 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 95 selfloop transitions, 25 changer transitions 0/129 dead transitions. [2024-06-04 16:17:55,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 129 transitions, 1060 flow [2024-06-04 16:17:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:17:55,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:17:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-06-04 16:17:55,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2024-06-04 16:17:55,742 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 743 flow. Second operand 5 states and 164 transitions. [2024-06-04 16:17:55,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 129 transitions, 1060 flow [2024-06-04 16:17:55,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 129 transitions, 968 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:55,778 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 712 flow [2024-06-04 16:17:55,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=712, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-04 16:17:55,779 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-04 16:17:55,779 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 712 flow [2024-06-04 16:17:55,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:55,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:55,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:55,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:17:55,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:55,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:55,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1709679874, now seen corresponding path program 1 times [2024-06-04 16:17:55,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:55,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824867856] [2024-06-04 16:17:55,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:55,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:56,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:56,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824867856] [2024-06-04 16:17:56,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824867856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:56,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:56,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:17:56,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795547838] [2024-06-04 16:17:56,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:56,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:17:56,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:17:56,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:17:56,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:56,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 712 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-04 16:17:56,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:56,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:56,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:57,082 INFO L124 PetriNetUnfolderBase]: 4998/7360 cut-off events. [2024-06-04 16:17:57,083 INFO L125 PetriNetUnfolderBase]: For 40838/40861 co-relation queries the response was YES. [2024-06-04 16:17:57,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29609 conditions, 7360 events. 4998/7360 cut-off events. For 40838/40861 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 42865 event pairs, 2477 based on Foata normal form. 27/7358 useless extension candidates. Maximal degree in co-relation 29574. Up to 6752 conditions per place. [2024-06-04 16:17:57,121 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 100 selfloop transitions, 14 changer transitions 0/128 dead transitions. [2024-06-04 16:17:57,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 128 transitions, 1088 flow [2024-06-04 16:17:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:17:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:17:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-04 16:17:57,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 16:17:57,123 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 712 flow. Second operand 4 states and 128 transitions. [2024-06-04 16:17:57,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 128 transitions, 1088 flow [2024-06-04 16:17:57,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 1032 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:57,151 INFO L231 Difference]: Finished difference. Result has 87 places, 113 transitions, 835 flow [2024-06-04 16:17:57,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=835, PETRI_PLACES=87, PETRI_TRANSITIONS=113} [2024-06-04 16:17:57,152 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-04 16:17:57,152 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 113 transitions, 835 flow [2024-06-04 16:17:57,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 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) [2024-06-04 16:17:57,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:57,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:57,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:17:57,153 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:57,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:57,153 INFO L85 PathProgramCache]: Analyzing trace with hash 441882047, now seen corresponding path program 1 times [2024-06-04 16:17:57,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:57,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777949486] [2024-06-04 16:17:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:57,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:57,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:57,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777949486] [2024-06-04 16:17:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777949486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:57,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541383465] [2024-06-04 16:17:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:57,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 113 transitions, 835 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:57,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:57,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:58,646 INFO L124 PetriNetUnfolderBase]: 6100/8926 cut-off events. [2024-06-04 16:17:58,646 INFO L125 PetriNetUnfolderBase]: For 65148/65365 co-relation queries the response was YES. [2024-06-04 16:17:58,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39636 conditions, 8926 events. 6100/8926 cut-off events. For 65148/65365 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52025 event pairs, 1808 based on Foata normal form. 62/8736 useless extension candidates. Maximal degree in co-relation 39599. Up to 7913 conditions per place. [2024-06-04 16:17:58,717 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 49 changer transitions 0/159 dead transitions. [2024-06-04 16:17:58,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1345 flow [2024-06-04 16:17:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:17:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:17:58,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-04 16:17:58,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6378205128205128 [2024-06-04 16:17:58,741 INFO L175 Difference]: Start difference. First operand has 87 places, 113 transitions, 835 flow. Second operand 6 states and 199 transitions. [2024-06-04 16:17:58,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1345 flow [2024-06-04 16:17:58,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 159 transitions, 1335 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-04 16:17:58,812 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 1007 flow [2024-06-04 16:17:58,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1007, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-04 16:17:58,813 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-04 16:17:58,813 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 1007 flow [2024-06-04 16:17:58,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:58,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:58,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:58,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:17:58,814 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:58,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:58,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1059941569, now seen corresponding path program 2 times [2024-06-04 16:17:58,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:58,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866695161] [2024-06-04 16:17:58,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:58,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:59,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866695161] [2024-06-04 16:17:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866695161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:59,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:59,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329031538] [2024-06-04 16:17:59,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:59,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:59,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:59,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:17:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 1007 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:17:59,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:00,341 INFO L124 PetriNetUnfolderBase]: 6152/8994 cut-off events. [2024-06-04 16:18:00,341 INFO L125 PetriNetUnfolderBase]: For 82571/82865 co-relation queries the response was YES. [2024-06-04 16:18:00,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42498 conditions, 8994 events. 6152/8994 cut-off events. For 82571/82865 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 52385 event pairs, 2212 based on Foata normal form. 75/8805 useless extension candidates. Maximal degree in co-relation 42458. Up to 8117 conditions per place. [2024-06-04 16:18:00,403 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 93 selfloop transitions, 45 changer transitions 0/158 dead transitions. [2024-06-04 16:18:00,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 158 transitions, 1415 flow [2024-06-04 16:18:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 195 transitions. [2024-06-04 16:18:00,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-04 16:18:00,404 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 1007 flow. Second operand 6 states and 195 transitions. [2024-06-04 16:18:00,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 158 transitions, 1415 flow [2024-06-04 16:18:00,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 158 transitions, 1331 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:18:00,490 INFO L231 Difference]: Finished difference. Result has 97 places, 122 transitions, 1070 flow [2024-06-04 16:18:00,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=929, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1070, PETRI_PLACES=97, PETRI_TRANSITIONS=122} [2024-06-04 16:18:00,491 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-04 16:18:00,491 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 122 transitions, 1070 flow [2024-06-04 16:18:00,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:00,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:00,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:00,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:18:00,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:00,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:00,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1132082559, now seen corresponding path program 3 times [2024-06-04 16:18:00,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:00,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976092208] [2024-06-04 16:18:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:00,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:00,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:00,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976092208] [2024-06-04 16:18:00,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976092208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:00,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:00,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131322011] [2024-06-04 16:18:00,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:01,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:01,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 122 transitions, 1070 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:01,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:01,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:01,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:02,000 INFO L124 PetriNetUnfolderBase]: 6120/8959 cut-off events. [2024-06-04 16:18:02,001 INFO L125 PetriNetUnfolderBase]: For 90292/90580 co-relation queries the response was YES. [2024-06-04 16:18:02,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42932 conditions, 8959 events. 6120/8959 cut-off events. For 90292/90580 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 52219 event pairs, 1798 based on Foata normal form. 106/8808 useless extension candidates. Maximal degree in co-relation 42890. Up to 8047 conditions per place. [2024-06-04 16:18:02,066 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 90 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-04 16:18:02,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1406 flow [2024-06-04 16:18:02,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:02,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-04 16:18:02,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6423076923076924 [2024-06-04 16:18:02,069 INFO L175 Difference]: Start difference. First operand has 97 places, 122 transitions, 1070 flow. Second operand 5 states and 167 transitions. [2024-06-04 16:18:02,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1406 flow [2024-06-04 16:18:02,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 151 transitions, 1289 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:02,158 INFO L231 Difference]: Finished difference. Result has 98 places, 122 transitions, 1051 flow [2024-06-04 16:18:02,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=953, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1051, PETRI_PLACES=98, PETRI_TRANSITIONS=122} [2024-06-04 16:18:02,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-04 16:18:02,158 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 122 transitions, 1051 flow [2024-06-04 16:18:02,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:02,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:02,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:02,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:18:02,159 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:02,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1412985479, now seen corresponding path program 1 times [2024-06-04 16:18:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:02,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890437506] [2024-06-04 16:18:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:02,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:02,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:02,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890437506] [2024-06-04 16:18:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890437506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:02,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:02,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211954704] [2024-06-04 16:18:02,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:02,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:02,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:02,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:02,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:02,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 122 transitions, 1051 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:02,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:02,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:02,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:03,805 INFO L124 PetriNetUnfolderBase]: 6715/9793 cut-off events. [2024-06-04 16:18:03,805 INFO L125 PetriNetUnfolderBase]: For 94509/94826 co-relation queries the response was YES. [2024-06-04 16:18:03,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45993 conditions, 9793 events. 6715/9793 cut-off events. For 94509/94826 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 56812 event pairs, 1908 based on Foata normal form. 117/9859 useless extension candidates. Maximal degree in co-relation 45950. Up to 8482 conditions per place. [2024-06-04 16:18:03,880 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 135 selfloop transitions, 43 changer transitions 0/189 dead transitions. [2024-06-04 16:18:03,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 189 transitions, 1765 flow [2024-06-04 16:18:03,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-04 16:18:03,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-04 16:18:03,882 INFO L175 Difference]: Start difference. First operand has 98 places, 122 transitions, 1051 flow. Second operand 7 states and 228 transitions. [2024-06-04 16:18:03,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 189 transitions, 1765 flow [2024-06-04 16:18:03,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1658 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:03,984 INFO L231 Difference]: Finished difference. Result has 103 places, 133 transitions, 1191 flow [2024-06-04 16:18:03,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=133} [2024-06-04 16:18:03,985 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-04 16:18:03,985 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 133 transitions, 1191 flow [2024-06-04 16:18:03,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:03,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:03,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:03,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:18:03,986 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:03,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1501551239, now seen corresponding path program 2 times [2024-06-04 16:18:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:03,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069804445] [2024-06-04 16:18:03,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:03,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:04,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:04,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069804445] [2024-06-04 16:18:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069804445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:04,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663488742] [2024-06-04 16:18:04,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:04,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:04,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:04,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 133 transitions, 1191 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:04,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:04,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:04,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:05,685 INFO L124 PetriNetUnfolderBase]: 6989/10199 cut-off events. [2024-06-04 16:18:05,685 INFO L125 PetriNetUnfolderBase]: For 112685/113054 co-relation queries the response was YES. [2024-06-04 16:18:05,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49946 conditions, 10199 events. 6989/10199 cut-off events. For 112685/113054 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 59624 event pairs, 2358 based on Foata normal form. 127/10275 useless extension candidates. Maximal degree in co-relation 49900. Up to 9096 conditions per place. [2024-06-04 16:18:05,808 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 141 selfloop transitions, 39 changer transitions 0/191 dead transitions. [2024-06-04 16:18:05,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 191 transitions, 1851 flow [2024-06-04 16:18:05,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 228 transitions. [2024-06-04 16:18:05,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-06-04 16:18:05,810 INFO L175 Difference]: Start difference. First operand has 103 places, 133 transitions, 1191 flow. Second operand 7 states and 228 transitions. [2024-06-04 16:18:05,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 191 transitions, 1851 flow [2024-06-04 16:18:05,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 191 transitions, 1792 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:18:05,937 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 1297 flow [2024-06-04 16:18:05,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1297, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2024-06-04 16:18:05,937 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 54 predicate places. [2024-06-04 16:18:05,938 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 1297 flow [2024-06-04 16:18:05,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:05,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:05,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:18:05,938 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:05,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1501699109, now seen corresponding path program 3 times [2024-06-04 16:18:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658225113] [2024-06-04 16:18:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:06,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:06,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658225113] [2024-06-04 16:18:06,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658225113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:06,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:06,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:06,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688704098] [2024-06-04 16:18:06,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:06,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:06,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:06,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:06,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:06,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:06,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 1297 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:06,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:06,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:06,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:07,687 INFO L124 PetriNetUnfolderBase]: 6935/10121 cut-off events. [2024-06-04 16:18:07,688 INFO L125 PetriNetUnfolderBase]: For 122389/122760 co-relation queries the response was YES. [2024-06-04 16:18:07,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50417 conditions, 10121 events. 6935/10121 cut-off events. For 122389/122760 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 59036 event pairs, 2363 based on Foata normal form. 133/10203 useless extension candidates. Maximal degree in co-relation 50368. Up to 9216 conditions per place. [2024-06-04 16:18:07,762 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 139 selfloop transitions, 36 changer transitions 0/186 dead transitions. [2024-06-04 16:18:07,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 186 transitions, 1790 flow [2024-06-04 16:18:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:07,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 16:18:07,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-04 16:18:07,764 INFO L175 Difference]: Start difference. First operand has 109 places, 138 transitions, 1297 flow. Second operand 7 states and 222 transitions. [2024-06-04 16:18:07,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 186 transitions, 1790 flow [2024-06-04 16:18:07,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 186 transitions, 1721 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:07,939 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1324 flow [2024-06-04 16:18:07,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1324, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-04 16:18:07,945 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-04 16:18:07,945 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1324 flow [2024-06-04 16:18:07,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:07,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:07,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:07,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:18:07,946 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:07,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash 740332721, now seen corresponding path program 4 times [2024-06-04 16:18:07,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:07,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427560346] [2024-06-04 16:18:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:07,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427560346] [2024-06-04 16:18:08,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427560346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:08,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:08,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:08,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643432059] [2024-06-04 16:18:08,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:08,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:08,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:08,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:08,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:08,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:08,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1324 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:08,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:08,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:08,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:09,701 INFO L124 PetriNetUnfolderBase]: 6968/10192 cut-off events. [2024-06-04 16:18:09,702 INFO L125 PetriNetUnfolderBase]: For 131050/131427 co-relation queries the response was YES. [2024-06-04 16:18:09,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 10192 events. 6968/10192 cut-off events. For 131050/131427 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 59535 event pairs, 2343 based on Foata normal form. 142/10293 useless extension candidates. Maximal degree in co-relation 51032. Up to 9310 conditions per place. [2024-06-04 16:18:09,777 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 154 selfloop transitions, 31 changer transitions 0/196 dead transitions. [2024-06-04 16:18:09,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 196 transitions, 1879 flow [2024-06-04 16:18:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 249 transitions. [2024-06-04 16:18:09,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5985576923076923 [2024-06-04 16:18:09,779 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1324 flow. Second operand 8 states and 249 transitions. [2024-06-04 16:18:09,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 196 transitions, 1879 flow [2024-06-04 16:18:09,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 196 transitions, 1807 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:09,926 INFO L231 Difference]: Finished difference. Result has 116 places, 141 transitions, 1362 flow [2024-06-04 16:18:09,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=116, PETRI_TRANSITIONS=141} [2024-06-04 16:18:09,926 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-04 16:18:09,927 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 141 transitions, 1362 flow [2024-06-04 16:18:09,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:09,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:09,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:09,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:18:09,927 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:09,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:09,928 INFO L85 PathProgramCache]: Analyzing trace with hash 734970341, now seen corresponding path program 5 times [2024-06-04 16:18:09,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:09,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730042177] [2024-06-04 16:18:09,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:09,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:10,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:10,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730042177] [2024-06-04 16:18:10,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730042177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:10,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:10,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:10,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251552172] [2024-06-04 16:18:10,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:10,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:10,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:10,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:10,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:10,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:10,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 141 transitions, 1362 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:10,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:10,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:10,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:11,687 INFO L124 PetriNetUnfolderBase]: 7114/10416 cut-off events. [2024-06-04 16:18:11,687 INFO L125 PetriNetUnfolderBase]: For 145143/145514 co-relation queries the response was YES. [2024-06-04 16:18:11,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53033 conditions, 10416 events. 7114/10416 cut-off events. For 145143/145514 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61023 event pairs, 2399 based on Foata normal form. 127/10494 useless extension candidates. Maximal degree in co-relation 52981. Up to 9523 conditions per place. [2024-06-04 16:18:11,776 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 143 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-04 16:18:11,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 183 transitions, 1857 flow [2024-06-04 16:18:11,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 16:18:11,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-04 16:18:11,778 INFO L175 Difference]: Start difference. First operand has 116 places, 141 transitions, 1362 flow. Second operand 6 states and 194 transitions. [2024-06-04 16:18:11,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 183 transitions, 1857 flow [2024-06-04 16:18:11,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 183 transitions, 1785 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:11,957 INFO L231 Difference]: Finished difference. Result has 116 places, 143 transitions, 1400 flow [2024-06-04 16:18:11,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1290, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1400, PETRI_PLACES=116, PETRI_TRANSITIONS=143} [2024-06-04 16:18:11,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-04 16:18:11,958 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 143 transitions, 1400 flow [2024-06-04 16:18:11,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:11,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:11,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:11,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:18:11,959 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:11,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash 734822471, now seen corresponding path program 6 times [2024-06-04 16:18:11,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:11,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503935651] [2024-06-04 16:18:11,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:12,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503935651] [2024-06-04 16:18:12,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503935651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:12,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:12,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:12,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121682046] [2024-06-04 16:18:12,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:12,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:12,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:12,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:12,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:12,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:12,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 143 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:12,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:12,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:12,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:13,679 INFO L124 PetriNetUnfolderBase]: 7075/10355 cut-off events. [2024-06-04 16:18:13,680 INFO L125 PetriNetUnfolderBase]: For 152682/153045 co-relation queries the response was YES. [2024-06-04 16:18:13,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52979 conditions, 10355 events. 7075/10355 cut-off events. For 152682/153045 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 60676 event pairs, 1958 based on Foata normal form. 141/10447 useless extension candidates. Maximal degree in co-relation 52926. Up to 9116 conditions per place. [2024-06-04 16:18:13,763 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 140 selfloop transitions, 37 changer transitions 0/188 dead transitions. [2024-06-04 16:18:13,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 188 transitions, 1897 flow [2024-06-04 16:18:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:13,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:13,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-04 16:18:13,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314102564102564 [2024-06-04 16:18:13,765 INFO L175 Difference]: Start difference. First operand has 116 places, 143 transitions, 1400 flow. Second operand 6 states and 197 transitions. [2024-06-04 16:18:13,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 188 transitions, 1897 flow [2024-06-04 16:18:13,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 188 transitions, 1815 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:13,965 INFO L231 Difference]: Finished difference. Result has 119 places, 145 transitions, 1438 flow [2024-06-04 16:18:13,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1438, PETRI_PLACES=119, PETRI_TRANSITIONS=145} [2024-06-04 16:18:13,965 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-04 16:18:13,966 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 145 transitions, 1438 flow [2024-06-04 16:18:13,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:13,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:13,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:13,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:18:13,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:13,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash 740547923, now seen corresponding path program 1 times [2024-06-04 16:18:13,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:13,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878342626] [2024-06-04 16:18:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:13,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878342626] [2024-06-04 16:18:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878342626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763924130] [2024-06-04 16:18:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:14,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 145 transitions, 1438 flow. Second operand has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:14,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:14,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:14,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:15,758 INFO L124 PetriNetUnfolderBase]: 6967/10209 cut-off events. [2024-06-04 16:18:15,758 INFO L125 PetriNetUnfolderBase]: For 159572/159923 co-relation queries the response was YES. [2024-06-04 16:18:15,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52530 conditions, 10209 events. 6967/10209 cut-off events. For 159572/159923 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 59633 event pairs, 2184 based on Foata normal form. 144/10312 useless extension candidates. Maximal degree in co-relation 52475. Up to 8973 conditions per place. [2024-06-04 16:18:15,838 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 156 selfloop transitions, 38 changer transitions 0/205 dead transitions. [2024-06-04 16:18:15,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 1979 flow [2024-06-04 16:18:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:18:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:18:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 16:18:15,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 16:18:15,840 INFO L175 Difference]: Start difference. First operand has 119 places, 145 transitions, 1438 flow. Second operand 8 states and 251 transitions. [2024-06-04 16:18:15,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 1979 flow [2024-06-04 16:18:16,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 205 transitions, 1844 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:18:16,101 INFO L231 Difference]: Finished difference. Result has 121 places, 146 transitions, 1378 flow [2024-06-04 16:18:16,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1263, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=121, PETRI_TRANSITIONS=146} [2024-06-04 16:18:16,102 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-04 16:18:16,102 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 146 transitions, 1378 flow [2024-06-04 16:18:16,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.75) internal successors, (150), 8 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:16,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:16,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:18:16,102 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:16,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash -904215641, now seen corresponding path program 1 times [2024-06-04 16:18:16,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:16,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734479975] [2024-06-04 16:18:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:16,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:16,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734479975] [2024-06-04 16:18:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734479975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:16,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:16,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:18:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335121360] [2024-06-04 16:18:16,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:18:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:18:16,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:18:16,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:16,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 146 transitions, 1378 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:16,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:16,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:16,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:17,606 INFO L124 PetriNetUnfolderBase]: 5676/8381 cut-off events. [2024-06-04 16:18:17,606 INFO L125 PetriNetUnfolderBase]: For 138754/139003 co-relation queries the response was YES. [2024-06-04 16:18:17,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44545 conditions, 8381 events. 5676/8381 cut-off events. For 138754/139003 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49240 event pairs, 2029 based on Foata normal form. 32/8386 useless extension candidates. Maximal degree in co-relation 44490. Up to 7824 conditions per place. [2024-06-04 16:18:17,674 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 132 selfloop transitions, 33 changer transitions 0/177 dead transitions. [2024-06-04 16:18:17,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 177 transitions, 1950 flow [2024-06-04 16:18:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:17,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:17,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-04 16:18:17,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-04 16:18:17,675 INFO L175 Difference]: Start difference. First operand has 121 places, 146 transitions, 1378 flow. Second operand 5 states and 160 transitions. [2024-06-04 16:18:17,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 177 transitions, 1950 flow [2024-06-04 16:18:17,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 1861 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:18:17,825 INFO L231 Difference]: Finished difference. Result has 120 places, 154 transitions, 1472 flow [2024-06-04 16:18:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1472, PETRI_PLACES=120, PETRI_TRANSITIONS=154} [2024-06-04 16:18:17,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 65 predicate places. [2024-06-04 16:18:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 154 transitions, 1472 flow [2024-06-04 16:18:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:17,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:17,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:18:17,827 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:17,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -872699801, now seen corresponding path program 2 times [2024-06-04 16:18:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:17,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378644460] [2024-06-04 16:18:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:18,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378644460] [2024-06-04 16:18:18,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378644460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:18,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:18,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:18:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588820868] [2024-06-04 16:18:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:18,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:18:18,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:18,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:18:18,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:18:18,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:18,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 154 transitions, 1472 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:18,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:18,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:18,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:19,439 INFO L124 PetriNetUnfolderBase]: 5669/8372 cut-off events. [2024-06-04 16:18:19,439 INFO L125 PetriNetUnfolderBase]: For 154341/154602 co-relation queries the response was YES. [2024-06-04 16:18:19,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46125 conditions, 8372 events. 5669/8372 cut-off events. For 154341/154602 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 49085 event pairs, 2029 based on Foata normal form. 34/8380 useless extension candidates. Maximal degree in co-relation 46069. Up to 7826 conditions per place. [2024-06-04 16:18:19,515 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 130 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2024-06-04 16:18:19,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1834 flow [2024-06-04 16:18:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:18:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:18:19,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 16:18:19,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-04 16:18:19,517 INFO L175 Difference]: Start difference. First operand has 120 places, 154 transitions, 1472 flow. Second operand 4 states and 132 transitions. [2024-06-04 16:18:19,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1834 flow [2024-06-04 16:18:19,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 171 transitions, 1741 flow, removed 36 selfloop flow, removed 1 redundant places. [2024-06-04 16:18:19,689 INFO L231 Difference]: Finished difference. Result has 123 places, 154 transitions, 1453 flow [2024-06-04 16:18:19,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1453, PETRI_PLACES=123, PETRI_TRANSITIONS=154} [2024-06-04 16:18:19,690 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-04 16:18:19,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 154 transitions, 1453 flow [2024-06-04 16:18:19,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:19,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:19,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:19,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:18:19,690 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:19,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1863391521, now seen corresponding path program 1 times [2024-06-04 16:18:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314416879] [2024-06-04 16:18:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:19,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:20,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314416879] [2024-06-04 16:18:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314416879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:20,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:20,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:18:20,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065911229] [2024-06-04 16:18:20,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:20,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:18:20,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:20,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:18:20,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:18:20,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:20,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 154 transitions, 1453 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:20,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:20,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:20,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:21,303 INFO L124 PetriNetUnfolderBase]: 5840/8644 cut-off events. [2024-06-04 16:18:21,303 INFO L125 PetriNetUnfolderBase]: For 160629/160684 co-relation queries the response was YES. [2024-06-04 16:18:21,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45630 conditions, 8644 events. 5840/8644 cut-off events. For 160629/160684 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 51334 event pairs, 2282 based on Foata normal form. 63/8680 useless extension candidates. Maximal degree in co-relation 45572. Up to 7977 conditions per place. [2024-06-04 16:18:21,373 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 145 selfloop transitions, 17 changer transitions 0/177 dead transitions. [2024-06-04 16:18:21,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 1857 flow [2024-06-04 16:18:21,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-04 16:18:21,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884615384615385 [2024-06-04 16:18:21,375 INFO L175 Difference]: Start difference. First operand has 123 places, 154 transitions, 1453 flow. Second operand 5 states and 153 transitions. [2024-06-04 16:18:21,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 1857 flow [2024-06-04 16:18:21,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 1799 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:21,511 INFO L231 Difference]: Finished difference. Result has 125 places, 157 transitions, 1469 flow [2024-06-04 16:18:21,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1469, PETRI_PLACES=125, PETRI_TRANSITIONS=157} [2024-06-04 16:18:21,512 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-04 16:18:21,512 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 157 transitions, 1469 flow [2024-06-04 16:18:21,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:21,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:21,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:21,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:18:21,512 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:21,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:21,513 INFO L85 PathProgramCache]: Analyzing trace with hash 938080417, now seen corresponding path program 1 times [2024-06-04 16:18:21,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:21,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800710102] [2024-06-04 16:18:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800710102] [2024-06-04 16:18:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800710102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:22,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:22,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778585454] [2024-06-04 16:18:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:22,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:22,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:22,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:22,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:22,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:22,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 157 transitions, 1469 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:22,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:22,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:22,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:23,373 INFO L124 PetriNetUnfolderBase]: 7463/10909 cut-off events. [2024-06-04 16:18:23,374 INFO L125 PetriNetUnfolderBase]: For 207782/207797 co-relation queries the response was YES. [2024-06-04 16:18:23,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57863 conditions, 10909 events. 7463/10909 cut-off events. For 207782/207797 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63540 event pairs, 2649 based on Foata normal form. 10/10913 useless extension candidates. Maximal degree in co-relation 57804. Up to 10181 conditions per place. [2024-06-04 16:18:23,469 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 179 selfloop transitions, 26 changer transitions 0/213 dead transitions. [2024-06-04 16:18:23,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 213 transitions, 2261 flow [2024-06-04 16:18:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:23,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 16:18:23,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-04 16:18:23,470 INFO L175 Difference]: Start difference. First operand has 125 places, 157 transitions, 1469 flow. Second operand 6 states and 181 transitions. [2024-06-04 16:18:23,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 213 transitions, 2261 flow [2024-06-04 16:18:23,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 213 transitions, 2204 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:23,741 INFO L231 Difference]: Finished difference. Result has 131 places, 180 transitions, 1722 flow [2024-06-04 16:18:23,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1722, PETRI_PLACES=131, PETRI_TRANSITIONS=180} [2024-06-04 16:18:23,741 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-04 16:18:23,741 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 180 transitions, 1722 flow [2024-06-04 16:18:23,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:23,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:23,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:23,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:18:23,742 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:23,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:23,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1818957531, now seen corresponding path program 2 times [2024-06-04 16:18:23,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:23,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412178728] [2024-06-04 16:18:23,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:23,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:24,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:24,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:24,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412178728] [2024-06-04 16:18:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412178728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:24,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:24,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893451561] [2024-06-04 16:18:24,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:24,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:24,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:24,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:24,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:24,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:24,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 180 transitions, 1722 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:24,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:24,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:24,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:25,544 INFO L124 PetriNetUnfolderBase]: 7479/10933 cut-off events. [2024-06-04 16:18:25,544 INFO L125 PetriNetUnfolderBase]: For 226146/226150 co-relation queries the response was YES. [2024-06-04 16:18:25,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60286 conditions, 10933 events. 7479/10933 cut-off events. For 226146/226150 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63806 event pairs, 2654 based on Foata normal form. 6/10932 useless extension candidates. Maximal degree in co-relation 60223. Up to 10198 conditions per place. [2024-06-04 16:18:25,640 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 171 selfloop transitions, 30 changer transitions 0/209 dead transitions. [2024-06-04 16:18:25,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2340 flow [2024-06-04 16:18:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-04 16:18:25,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807692307692308 [2024-06-04 16:18:25,649 INFO L175 Difference]: Start difference. First operand has 131 places, 180 transitions, 1722 flow. Second operand 5 states and 151 transitions. [2024-06-04 16:18:25,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2340 flow [2024-06-04 16:18:25,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 209 transitions, 2308 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-04 16:18:25,917 INFO L231 Difference]: Finished difference. Result has 137 places, 186 transitions, 1831 flow [2024-06-04 16:18:25,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1831, PETRI_PLACES=137, PETRI_TRANSITIONS=186} [2024-06-04 16:18:25,918 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 82 predicate places. [2024-06-04 16:18:25,918 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 186 transitions, 1831 flow [2024-06-04 16:18:25,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:25,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:25,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:25,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:18:25,918 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:25,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1818946371, now seen corresponding path program 3 times [2024-06-04 16:18:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:25,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303961991] [2024-06-04 16:18:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:26,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303961991] [2024-06-04 16:18:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303961991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:26,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78304756] [2024-06-04 16:18:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:26,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:26,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:26,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 186 transitions, 1831 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:26,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:26,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:27,778 INFO L124 PetriNetUnfolderBase]: 7472/10926 cut-off events. [2024-06-04 16:18:27,779 INFO L125 PetriNetUnfolderBase]: For 241088/241114 co-relation queries the response was YES. [2024-06-04 16:18:27,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61040 conditions, 10926 events. 7472/10926 cut-off events. For 241088/241114 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63774 event pairs, 2649 based on Foata normal form. 18/10938 useless extension candidates. Maximal degree in co-relation 60973. Up to 10191 conditions per place. [2024-06-04 16:18:27,874 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 173 selfloop transitions, 31 changer transitions 0/212 dead transitions. [2024-06-04 16:18:27,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 212 transitions, 2309 flow [2024-06-04 16:18:27,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-04 16:18:27,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-04 16:18:27,876 INFO L175 Difference]: Start difference. First operand has 137 places, 186 transitions, 1831 flow. Second operand 5 states and 155 transitions. [2024-06-04 16:18:27,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 212 transitions, 2309 flow [2024-06-04 16:18:28,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 212 transitions, 2249 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-04 16:18:28,208 INFO L231 Difference]: Finished difference. Result has 141 places, 186 transitions, 1847 flow [2024-06-04 16:18:28,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1847, PETRI_PLACES=141, PETRI_TRANSITIONS=186} [2024-06-04 16:18:28,209 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-04 16:18:28,209 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 186 transitions, 1847 flow [2024-06-04 16:18:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:28,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:28,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:28,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:18:28,210 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:28,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2145451239, now seen corresponding path program 1 times [2024-06-04 16:18:28,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:28,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910029320] [2024-06-04 16:18:28,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:28,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:28,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910029320] [2024-06-04 16:18:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910029320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:28,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:28,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:28,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790580123] [2024-06-04 16:18:28,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:28,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:28,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:28,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:28,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:28,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:28,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 186 transitions, 1847 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:28,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:28,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:28,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:29,941 INFO L124 PetriNetUnfolderBase]: 6148/8991 cut-off events. [2024-06-04 16:18:29,941 INFO L125 PetriNetUnfolderBase]: For 216241/216248 co-relation queries the response was YES. [2024-06-04 16:18:29,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51954 conditions, 8991 events. 6148/8991 cut-off events. For 216241/216248 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52057 event pairs, 2307 based on Foata normal form. 6/8992 useless extension candidates. Maximal degree in co-relation 51885. Up to 8422 conditions per place. [2024-06-04 16:18:30,022 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 190 selfloop transitions, 33 changer transitions 0/232 dead transitions. [2024-06-04 16:18:30,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2622 flow [2024-06-04 16:18:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:30,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-04 16:18:30,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-04 16:18:30,023 INFO L175 Difference]: Start difference. First operand has 141 places, 186 transitions, 1847 flow. Second operand 6 states and 183 transitions. [2024-06-04 16:18:30,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2622 flow [2024-06-04 16:18:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 232 transitions, 2574 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:30,277 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2061 flow [2024-06-04 16:18:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2061, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-04 16:18:30,278 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-04 16:18:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2061 flow [2024-06-04 16:18:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:30,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:30,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:30,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:18:30,279 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:30,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:30,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1283882509, now seen corresponding path program 2 times [2024-06-04 16:18:30,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:30,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474148884] [2024-06-04 16:18:30,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:30,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:30,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:31,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:31,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:31,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474148884] [2024-06-04 16:18:31,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474148884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:31,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:31,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:31,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554761361] [2024-06-04 16:18:31,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:31,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:31,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2061 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:32,201 INFO L124 PetriNetUnfolderBase]: 6164/9018 cut-off events. [2024-06-04 16:18:32,201 INFO L125 PetriNetUnfolderBase]: For 221400/221410 co-relation queries the response was YES. [2024-06-04 16:18:32,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53716 conditions, 9018 events. 6164/9018 cut-off events. For 221400/221410 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 52072 event pairs, 2299 based on Foata normal form. 10/9024 useless extension candidates. Maximal degree in co-relation 53645. Up to 8457 conditions per place. [2024-06-04 16:18:32,300 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 199 selfloop transitions, 33 changer transitions 0/241 dead transitions. [2024-06-04 16:18:32,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 241 transitions, 2781 flow [2024-06-04 16:18:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:32,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:32,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-06-04 16:18:32,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5686813186813187 [2024-06-04 16:18:32,307 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2061 flow. Second operand 7 states and 207 transitions. [2024-06-04 16:18:32,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 241 transitions, 2781 flow [2024-06-04 16:18:32,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 241 transitions, 2697 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-04 16:18:32,625 INFO L231 Difference]: Finished difference. Result has 152 places, 209 transitions, 2127 flow [2024-06-04 16:18:32,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2127, PETRI_PLACES=152, PETRI_TRANSITIONS=209} [2024-06-04 16:18:32,627 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-04 16:18:32,627 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 209 transitions, 2127 flow [2024-06-04 16:18:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:32,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:32,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:32,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:18:32,628 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:32,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1283888089, now seen corresponding path program 3 times [2024-06-04 16:18:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:32,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464249460] [2024-06-04 16:18:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:33,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:33,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464249460] [2024-06-04 16:18:33,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464249460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:33,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:33,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:33,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552015402] [2024-06-04 16:18:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:33,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:33,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:33,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 209 transitions, 2127 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:33,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:33,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:33,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:34,612 INFO L124 PetriNetUnfolderBase]: 6157/9008 cut-off events. [2024-06-04 16:18:34,613 INFO L125 PetriNetUnfolderBase]: For 233096/233106 co-relation queries the response was YES. [2024-06-04 16:18:34,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53818 conditions, 9008 events. 6157/9008 cut-off events. For 233096/233106 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 51929 event pairs, 2307 based on Foata normal form. 8/9011 useless extension candidates. Maximal degree in co-relation 53745. Up to 8450 conditions per place. [2024-06-04 16:18:34,718 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 191 selfloop transitions, 31 changer transitions 0/231 dead transitions. [2024-06-04 16:18:34,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 231 transitions, 2631 flow [2024-06-04 16:18:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:34,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-06-04 16:18:34,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:18:34,720 INFO L175 Difference]: Start difference. First operand has 152 places, 209 transitions, 2127 flow. Second operand 5 states and 156 transitions. [2024-06-04 16:18:34,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 231 transitions, 2631 flow [2024-06-04 16:18:35,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 231 transitions, 2521 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:35,016 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2088 flow [2024-06-04 16:18:35,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2017, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2088, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-06-04 16:18:35,016 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-04 16:18:35,017 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2088 flow [2024-06-04 16:18:35,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:35,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:35,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:35,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:18:35,017 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:35,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:35,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1298363159, now seen corresponding path program 1 times [2024-06-04 16:18:35,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:35,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438964230] [2024-06-04 16:18:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:35,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:35,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:35,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438964230] [2024-06-04 16:18:35,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438964230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:35,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:35,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:18:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771444888] [2024-06-04 16:18:35,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:18:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:18:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:18:35,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:35,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2088 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:35,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:35,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:35,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:37,100 INFO L124 PetriNetUnfolderBase]: 6897/10158 cut-off events. [2024-06-04 16:18:37,101 INFO L125 PetriNetUnfolderBase]: For 318594/318755 co-relation queries the response was YES. [2024-06-04 16:18:37,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62319 conditions, 10158 events. 6897/10158 cut-off events. For 318594/318755 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 60394 event pairs, 2392 based on Foata normal form. 45/9978 useless extension candidates. Maximal degree in co-relation 62245. Up to 9062 conditions per place. [2024-06-04 16:18:37,194 INFO L140 encePairwiseOnDemand]: 45/52 looper letters, 178 selfloop transitions, 18 changer transitions 0/239 dead transitions. [2024-06-04 16:18:37,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 239 transitions, 2726 flow [2024-06-04 16:18:37,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:18:37,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:18:37,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-04 16:18:37,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5913461538461539 [2024-06-04 16:18:37,196 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2088 flow. Second operand 4 states and 123 transitions. [2024-06-04 16:18:37,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 239 transitions, 2726 flow [2024-06-04 16:18:37,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 239 transitions, 2656 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:37,625 INFO L231 Difference]: Finished difference. Result has 154 places, 226 transitions, 2311 flow [2024-06-04 16:18:37,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2311, PETRI_PLACES=154, PETRI_TRANSITIONS=226} [2024-06-04 16:18:37,626 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 99 predicate places. [2024-06-04 16:18:37,626 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 226 transitions, 2311 flow [2024-06-04 16:18:37,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:37,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:37,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:37,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:18:37,627 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:37,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2081619046, now seen corresponding path program 1 times [2024-06-04 16:18:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313616806] [2024-06-04 16:18:37,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:38,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313616806] [2024-06-04 16:18:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313616806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:38,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054213424] [2024-06-04 16:18:38,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:38,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:38,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:38,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 226 transitions, 2311 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:38,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:38,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:38,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:39,713 INFO L124 PetriNetUnfolderBase]: 6790/10088 cut-off events. [2024-06-04 16:18:39,713 INFO L125 PetriNetUnfolderBase]: For 343893/344483 co-relation queries the response was YES. [2024-06-04 16:18:39,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65929 conditions, 10088 events. 6790/10088 cut-off events. For 343893/344483 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 60426 event pairs, 2033 based on Foata normal form. 73/9793 useless extension candidates. Maximal degree in co-relation 65853. Up to 8986 conditions per place. [2024-06-04 16:18:39,806 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 176 selfloop transitions, 61 changer transitions 0/264 dead transitions. [2024-06-04 16:18:39,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 264 transitions, 3095 flow [2024-06-04 16:18:39,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 16:18:39,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6089743589743589 [2024-06-04 16:18:39,808 INFO L175 Difference]: Start difference. First operand has 154 places, 226 transitions, 2311 flow. Second operand 6 states and 190 transitions. [2024-06-04 16:18:39,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 264 transitions, 3095 flow [2024-06-04 16:18:40,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 264 transitions, 3075 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-04 16:18:40,177 INFO L231 Difference]: Finished difference. Result has 160 places, 232 transitions, 2539 flow [2024-06-04 16:18:40,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2539, PETRI_PLACES=160, PETRI_TRANSITIONS=232} [2024-06-04 16:18:40,178 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 105 predicate places. [2024-06-04 16:18:40,178 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 232 transitions, 2539 flow [2024-06-04 16:18:40,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:40,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:40,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:40,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:18:40,179 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:40,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:40,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1367779226, now seen corresponding path program 2 times [2024-06-04 16:18:40,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:40,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797235695] [2024-06-04 16:18:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:40,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:40,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:40,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797235695] [2024-06-04 16:18:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797235695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:40,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004038346] [2024-06-04 16:18:40,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:40,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:40,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:40,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:40,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:40,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 232 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:40,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:40,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:40,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:42,252 INFO L124 PetriNetUnfolderBase]: 6847/10169 cut-off events. [2024-06-04 16:18:42,253 INFO L125 PetriNetUnfolderBase]: For 374226/374912 co-relation queries the response was YES. [2024-06-04 16:18:42,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68566 conditions, 10169 events. 6847/10169 cut-off events. For 374226/374912 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 61055 event pairs, 2199 based on Foata normal form. 58/9859 useless extension candidates. Maximal degree in co-relation 68487. Up to 9207 conditions per place. [2024-06-04 16:18:42,359 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 177 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-04 16:18:42,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 261 transitions, 3135 flow [2024-06-04 16:18:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:18:42,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:18:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-04 16:18:42,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-04 16:18:42,360 INFO L175 Difference]: Start difference. First operand has 160 places, 232 transitions, 2539 flow. Second operand 6 states and 184 transitions. [2024-06-04 16:18:42,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 261 transitions, 3135 flow [2024-06-04 16:18:42,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 261 transitions, 2993 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 16:18:42,879 INFO L231 Difference]: Finished difference. Result has 164 places, 235 transitions, 2588 flow [2024-06-04 16:18:42,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2588, PETRI_PLACES=164, PETRI_TRANSITIONS=235} [2024-06-04 16:18:42,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 109 predicate places. [2024-06-04 16:18:42,880 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 235 transitions, 2588 flow [2024-06-04 16:18:42,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:42,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:42,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:42,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:18:42,880 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:42,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:42,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1145828058, now seen corresponding path program 3 times [2024-06-04 16:18:42,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:42,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49721480] [2024-06-04 16:18:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:42,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:43,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:43,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49721480] [2024-06-04 16:18:43,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49721480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:43,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:43,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:18:43,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818731116] [2024-06-04 16:18:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:43,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:18:43,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:43,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:18:43,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:18:43,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:18:43,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 235 transitions, 2588 flow. Second operand has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:43,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:43,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:18:43,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:45,006 INFO L124 PetriNetUnfolderBase]: 6820/10134 cut-off events. [2024-06-04 16:18:45,007 INFO L125 PetriNetUnfolderBase]: For 388095/388757 co-relation queries the response was YES. [2024-06-04 16:18:45,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 10134 events. 6820/10134 cut-off events. For 388095/388757 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 60750 event pairs, 2023 based on Foata normal form. 86/9854 useless extension candidates. Maximal degree in co-relation 68307. Up to 9124 conditions per place. [2024-06-04 16:18:45,113 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 180 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-04 16:18:45,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 260 transitions, 3118 flow [2024-06-04 16:18:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:18:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:18:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-04 16:18:45,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6230769230769231 [2024-06-04 16:18:45,114 INFO L175 Difference]: Start difference. First operand has 164 places, 235 transitions, 2588 flow. Second operand 5 states and 162 transitions. [2024-06-04 16:18:45,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 260 transitions, 3118 flow [2024-06-04 16:18:45,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 260 transitions, 2957 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:45,669 INFO L231 Difference]: Finished difference. Result has 165 places, 235 transitions, 2547 flow [2024-06-04 16:18:45,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2427, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2547, PETRI_PLACES=165, PETRI_TRANSITIONS=235} [2024-06-04 16:18:45,669 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 110 predicate places. [2024-06-04 16:18:45,669 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 235 transitions, 2547 flow [2024-06-04 16:18:45,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.285714285714285) internal successors, (142), 7 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:45,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:45,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:45,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:18:45,670 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:45,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 374736100, now seen corresponding path program 1 times [2024-06-04 16:18:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:45,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547374692] [2024-06-04 16:18:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547374692] [2024-06-04 16:18:46,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547374692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:46,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:46,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447092797] [2024-06-04 16:18:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:46,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:46,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:46,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 235 transitions, 2547 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:46,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:46,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:46,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:47,947 INFO L124 PetriNetUnfolderBase]: 7825/11383 cut-off events. [2024-06-04 16:18:47,948 INFO L125 PetriNetUnfolderBase]: For 374029/374053 co-relation queries the response was YES. [2024-06-04 16:18:48,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71024 conditions, 11383 events. 7825/11383 cut-off events. For 374029/374053 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65909 event pairs, 2105 based on Foata normal form. 28/11406 useless extension candidates. Maximal degree in co-relation 70942. Up to 10367 conditions per place. [2024-06-04 16:18:48,042 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 247 selfloop transitions, 39 changer transitions 0/294 dead transitions. [2024-06-04 16:18:48,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 294 transitions, 3493 flow [2024-06-04 16:18:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 16:18:48,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-04 16:18:48,044 INFO L175 Difference]: Start difference. First operand has 165 places, 235 transitions, 2547 flow. Second operand 7 states and 213 transitions. [2024-06-04 16:18:48,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 294 transitions, 3493 flow [2024-06-04 16:18:48,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3376 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:48,512 INFO L231 Difference]: Finished difference. Result has 170 places, 245 transitions, 2637 flow [2024-06-04 16:18:48,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2637, PETRI_PLACES=170, PETRI_TRANSITIONS=245} [2024-06-04 16:18:48,513 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-04 16:18:48,513 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 245 transitions, 2637 flow [2024-06-04 16:18:48,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:48,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:48,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:48,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:18:48,513 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:48,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 640433380, now seen corresponding path program 2 times [2024-06-04 16:18:48,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047583114] [2024-06-04 16:18:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:49,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:49,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047583114] [2024-06-04 16:18:49,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047583114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:49,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718096714] [2024-06-04 16:18:49,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:49,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:49,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:49,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 245 transitions, 2637 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:49,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:49,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:49,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:50,960 INFO L124 PetriNetUnfolderBase]: 8065/11719 cut-off events. [2024-06-04 16:18:50,960 INFO L125 PetriNetUnfolderBase]: For 406759/406783 co-relation queries the response was YES. [2024-06-04 16:18:51,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74650 conditions, 11719 events. 8065/11719 cut-off events. For 406759/406783 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 68109 event pairs, 2589 based on Foata normal form. 28/11742 useless extension candidates. Maximal degree in co-relation 74565. Up to 10803 conditions per place. [2024-06-04 16:18:51,075 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 251 selfloop transitions, 36 changer transitions 0/295 dead transitions. [2024-06-04 16:18:51,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 295 transitions, 3546 flow [2024-06-04 16:18:51,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:51,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-04 16:18:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-04 16:18:51,077 INFO L175 Difference]: Start difference. First operand has 170 places, 245 transitions, 2637 flow. Second operand 7 states and 210 transitions. [2024-06-04 16:18:51,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 295 transitions, 3546 flow [2024-06-04 16:18:51,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 295 transitions, 3494 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-04 16:18:51,706 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 2745 flow [2024-06-04 16:18:51,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2745, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-04 16:18:51,707 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-04 16:18:51,707 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 2745 flow [2024-06-04 16:18:51,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:51,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:51,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:18:51,707 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:51,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 640759810, now seen corresponding path program 3 times [2024-06-04 16:18:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:51,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636355253] [2024-06-04 16:18:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636355253] [2024-06-04 16:18:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636355253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:52,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:52,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:52,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217353264] [2024-06-04 16:18:52,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:52,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:52,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:52,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:52,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 2745 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:52,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:52,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:54,141 INFO L124 PetriNetUnfolderBase]: 8021/11659 cut-off events. [2024-06-04 16:18:54,141 INFO L125 PetriNetUnfolderBase]: For 421214/421238 co-relation queries the response was YES. [2024-06-04 16:18:54,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74749 conditions, 11659 events. 8021/11659 cut-off events. For 421214/421238 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 67702 event pairs, 2588 based on Foata normal form. 32/11686 useless extension candidates. Maximal degree in co-relation 74661. Up to 10866 conditions per place. [2024-06-04 16:18:54,256 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 250 selfloop transitions, 33 changer transitions 0/291 dead transitions. [2024-06-04 16:18:54,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 291 transitions, 3444 flow [2024-06-04 16:18:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-04 16:18:54,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631868131868132 [2024-06-04 16:18:54,257 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 2745 flow. Second operand 7 states and 205 transitions. [2024-06-04 16:18:54,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 291 transitions, 3444 flow [2024-06-04 16:18:54,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 291 transitions, 3398 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:18:54,910 INFO L231 Difference]: Finished difference. Result has 180 places, 252 transitions, 2789 flow [2024-06-04 16:18:54,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2701, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2789, PETRI_PLACES=180, PETRI_TRANSITIONS=252} [2024-06-04 16:18:54,911 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-04 16:18:54,911 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 252 transitions, 2789 flow [2024-06-04 16:18:54,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:54,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:54,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:54,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:18:54,911 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:54,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:54,912 INFO L85 PathProgramCache]: Analyzing trace with hash 463273960, now seen corresponding path program 1 times [2024-06-04 16:18:54,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:54,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501509362] [2024-06-04 16:18:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:54,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:55,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:55,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501509362] [2024-06-04 16:18:55,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501509362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:55,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:55,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:55,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147315077] [2024-06-04 16:18:55,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:55,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:55,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:55,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:55,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:55,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:18:55,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 252 transitions, 2789 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:55,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:55,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:18:55,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:18:57,200 INFO L124 PetriNetUnfolderBase]: 7665/11275 cut-off events. [2024-06-04 16:18:57,200 INFO L125 PetriNetUnfolderBase]: For 482667/483540 co-relation queries the response was YES. [2024-06-04 16:18:57,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76756 conditions, 11275 events. 7665/11275 cut-off events. For 482667/483540 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 67569 event pairs, 2313 based on Foata normal form. 124/10980 useless extension candidates. Maximal degree in co-relation 76666. Up to 9935 conditions per place. [2024-06-04 16:18:57,322 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 184 selfloop transitions, 93 changer transitions 0/307 dead transitions. [2024-06-04 16:18:57,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 307 transitions, 3929 flow [2024-06-04 16:18:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:18:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:18:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-04 16:18:57,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-06-04 16:18:57,324 INFO L175 Difference]: Start difference. First operand has 180 places, 252 transitions, 2789 flow. Second operand 7 states and 223 transitions. [2024-06-04 16:18:57,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 307 transitions, 3929 flow [2024-06-04 16:18:58,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 307 transitions, 3882 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:18:58,152 INFO L231 Difference]: Finished difference. Result has 183 places, 264 transitions, 3137 flow [2024-06-04 16:18:58,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2742, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3137, PETRI_PLACES=183, PETRI_TRANSITIONS=264} [2024-06-04 16:18:58,153 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 128 predicate places. [2024-06-04 16:18:58,153 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 264 transitions, 3137 flow [2024-06-04 16:18:58,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:58,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:18:58,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:18:58,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:18:58,154 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:18:58,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:18:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 463394116, now seen corresponding path program 1 times [2024-06-04 16:18:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:18:58,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796276006] [2024-06-04 16:18:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:18:58,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:18:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:18:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:18:58,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:18:58,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796276006] [2024-06-04 16:18:58,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796276006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:18:58,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:18:58,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:18:58,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311295020] [2024-06-04 16:18:58,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:18:58,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:18:58,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:18:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:18:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:18:58,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:18:58,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 264 transitions, 3137 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:18:58,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:18:58,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:18:58,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:00,427 INFO L124 PetriNetUnfolderBase]: 8133/11896 cut-off events. [2024-06-04 16:19:00,428 INFO L125 PetriNetUnfolderBase]: For 468745/468783 co-relation queries the response was YES. [2024-06-04 16:19:00,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79154 conditions, 11896 events. 8133/11896 cut-off events. For 468745/468783 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 70139 event pairs, 2602 based on Foata normal form. 30/11919 useless extension candidates. Maximal degree in co-relation 79063. Up to 10882 conditions per place. [2024-06-04 16:19:00,554 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 263 selfloop transitions, 63 changer transitions 0/334 dead transitions. [2024-06-04 16:19:00,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 334 transitions, 4495 flow [2024-06-04 16:19:00,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:00,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-04 16:19:00,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-04 16:19:00,560 INFO L175 Difference]: Start difference. First operand has 183 places, 264 transitions, 3137 flow. Second operand 7 states and 214 transitions. [2024-06-04 16:19:00,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 334 transitions, 4495 flow [2024-06-04 16:19:01,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 334 transitions, 4349 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 16:19:01,431 INFO L231 Difference]: Finished difference. Result has 191 places, 289 transitions, 3483 flow [2024-06-04 16:19:01,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2999, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3483, PETRI_PLACES=191, PETRI_TRANSITIONS=289} [2024-06-04 16:19:01,431 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 136 predicate places. [2024-06-04 16:19:01,432 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 289 transitions, 3483 flow [2024-06-04 16:19:01,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:01,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:01,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:01,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:19:01,432 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:01,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 463393930, now seen corresponding path program 2 times [2024-06-04 16:19:01,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:01,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885175060] [2024-06-04 16:19:01,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:01,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885175060] [2024-06-04 16:19:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885175060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:02,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:02,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:02,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089982259] [2024-06-04 16:19:02,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:02,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:02,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:02,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:02,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:02,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:02,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 289 transitions, 3483 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:02,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:02,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:02,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:03,832 INFO L124 PetriNetUnfolderBase]: 7756/11420 cut-off events. [2024-06-04 16:19:03,833 INFO L125 PetriNetUnfolderBase]: For 552033/553315 co-relation queries the response was YES. [2024-06-04 16:19:03,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82626 conditions, 11420 events. 7756/11420 cut-off events. For 552033/553315 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 68802 event pairs, 2277 based on Foata normal form. 82/11128 useless extension candidates. Maximal degree in co-relation 82530. Up to 10243 conditions per place. [2024-06-04 16:19:03,980 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 83 changer transitions 0/332 dead transitions. [2024-06-04 16:19:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 332 transitions, 4262 flow [2024-06-04 16:19:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:03,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-04 16:19:03,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851648351648352 [2024-06-04 16:19:03,981 INFO L175 Difference]: Start difference. First operand has 191 places, 289 transitions, 3483 flow. Second operand 7 states and 213 transitions. [2024-06-04 16:19:03,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 332 transitions, 4262 flow [2024-06-04 16:19:05,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 332 transitions, 4180 flow, removed 32 selfloop flow, removed 1 redundant places. [2024-06-04 16:19:05,129 INFO L231 Difference]: Finished difference. Result has 197 places, 297 transitions, 3678 flow [2024-06-04 16:19:05,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3401, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=197, PETRI_TRANSITIONS=297} [2024-06-04 16:19:05,130 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2024-06-04 16:19:05,130 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 297 transitions, 3678 flow [2024-06-04 16:19:05,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:05,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:05,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:05,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:19:05,130 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:05,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash 640525636, now seen corresponding path program 2 times [2024-06-04 16:19:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086002662] [2024-06-04 16:19:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:05,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:05,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086002662] [2024-06-04 16:19:05,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086002662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:05,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:05,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:05,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787732239] [2024-06-04 16:19:05,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:05,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:05,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:05,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:05,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 297 transitions, 3678 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:05,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:05,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:05,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:07,553 INFO L124 PetriNetUnfolderBase]: 8257/12073 cut-off events. [2024-06-04 16:19:07,553 INFO L125 PetriNetUnfolderBase]: For 525677/525718 co-relation queries the response was YES. [2024-06-04 16:19:07,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83870 conditions, 12073 events. 8257/12073 cut-off events. For 525677/525718 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 71279 event pairs, 2602 based on Foata normal form. 33/12099 useless extension candidates. Maximal degree in co-relation 83772. Up to 11010 conditions per place. [2024-06-04 16:19:07,701 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 274 selfloop transitions, 77 changer transitions 0/359 dead transitions. [2024-06-04 16:19:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 359 transitions, 5206 flow [2024-06-04 16:19:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-04 16:19:07,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-06-04 16:19:07,703 INFO L175 Difference]: Start difference. First operand has 197 places, 297 transitions, 3678 flow. Second operand 7 states and 214 transitions. [2024-06-04 16:19:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 359 transitions, 5206 flow [2024-06-04 16:19:08,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 359 transitions, 4990 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 16:19:08,849 INFO L231 Difference]: Finished difference. Result has 202 places, 315 transitions, 3900 flow [2024-06-04 16:19:08,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3900, PETRI_PLACES=202, PETRI_TRANSITIONS=315} [2024-06-04 16:19:08,850 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 147 predicate places. [2024-06-04 16:19:08,850 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 315 transitions, 3900 flow [2024-06-04 16:19:08,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:08,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:08,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:08,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:19:08,851 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:08,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 468035560, now seen corresponding path program 3 times [2024-06-04 16:19:08,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:08,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652952673] [2024-06-04 16:19:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:09,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:09,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652952673] [2024-06-04 16:19:09,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652952673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:09,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:09,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227317598] [2024-06-04 16:19:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:09,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:09,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 315 transitions, 3900 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:09,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:09,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:11,312 INFO L124 PetriNetUnfolderBase]: 7905/11639 cut-off events. [2024-06-04 16:19:11,313 INFO L125 PetriNetUnfolderBase]: For 610095/611371 co-relation queries the response was YES. [2024-06-04 16:19:11,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86054 conditions, 11639 events. 7905/11639 cut-off events. For 610095/611371 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 70044 event pairs, 2277 based on Foata normal form. 92/11358 useless extension candidates. Maximal degree in co-relation 85953. Up to 10387 conditions per place. [2024-06-04 16:19:11,449 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 229 selfloop transitions, 107 changer transitions 0/373 dead transitions. [2024-06-04 16:19:11,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 373 transitions, 5094 flow [2024-06-04 16:19:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-04 16:19:11,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5697115384615384 [2024-06-04 16:19:11,450 INFO L175 Difference]: Start difference. First operand has 202 places, 315 transitions, 3900 flow. Second operand 8 states and 237 transitions. [2024-06-04 16:19:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 373 transitions, 5094 flow [2024-06-04 16:19:12,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 373 transitions, 4975 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:19:12,565 INFO L231 Difference]: Finished difference. Result has 210 places, 335 transitions, 4328 flow [2024-06-04 16:19:12,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4328, PETRI_PLACES=210, PETRI_TRANSITIONS=335} [2024-06-04 16:19:12,565 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 155 predicate places. [2024-06-04 16:19:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 335 transitions, 4328 flow [2024-06-04 16:19:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:12,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:12,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:12,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:19:12,566 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:12,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 640762786, now seen corresponding path program 3 times [2024-06-04 16:19:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:12,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815165042] [2024-06-04 16:19:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:12,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:13,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815165042] [2024-06-04 16:19:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815165042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281048199] [2024-06-04 16:19:13,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:13,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:13,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:13,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:13,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 335 transitions, 4328 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:13,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:13,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:13,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:15,024 INFO L124 PetriNetUnfolderBase]: 8328/12175 cut-off events. [2024-06-04 16:19:15,024 INFO L125 PetriNetUnfolderBase]: For 577128/577172 co-relation queries the response was YES. [2024-06-04 16:19:15,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86230 conditions, 12175 events. 8328/12175 cut-off events. For 577128/577172 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 71834 event pairs, 2603 based on Foata normal form. 35/12203 useless extension candidates. Maximal degree in co-relation 86126. Up to 11104 conditions per place. [2024-06-04 16:19:15,198 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 290 selfloop transitions, 81 changer transitions 0/379 dead transitions. [2024-06-04 16:19:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 379 transitions, 5556 flow [2024-06-04 16:19:15,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-04 16:19:15,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796703296703297 [2024-06-04 16:19:15,199 INFO L175 Difference]: Start difference. First operand has 210 places, 335 transitions, 4328 flow. Second operand 7 states and 211 transitions. [2024-06-04 16:19:15,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 379 transitions, 5556 flow [2024-06-04 16:19:16,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 379 transitions, 5331 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-04 16:19:16,330 INFO L231 Difference]: Finished difference. Result has 215 places, 338 transitions, 4332 flow [2024-06-04 16:19:16,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4332, PETRI_PLACES=215, PETRI_TRANSITIONS=338} [2024-06-04 16:19:16,332 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 160 predicate places. [2024-06-04 16:19:16,332 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 338 transitions, 4332 flow [2024-06-04 16:19:16,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:16,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:16,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:16,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:19:16,332 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:16,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash -33450150, now seen corresponding path program 4 times [2024-06-04 16:19:16,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:16,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456816516] [2024-06-04 16:19:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:16,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:16,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456816516] [2024-06-04 16:19:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456816516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911793378] [2024-06-04 16:19:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:17,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 338 transitions, 4332 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:17,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:17,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:17,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:18,798 INFO L124 PetriNetUnfolderBase]: 8426/12315 cut-off events. [2024-06-04 16:19:18,798 INFO L125 PetriNetUnfolderBase]: For 615678/615680 co-relation queries the response was YES. [2024-06-04 16:19:18,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87479 conditions, 12315 events. 8426/12315 cut-off events. For 615678/615680 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 72756 event pairs, 2578 based on Foata normal form. 18/12326 useless extension candidates. Maximal degree in co-relation 87374. Up to 11404 conditions per place. [2024-06-04 16:19:18,948 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 328 selfloop transitions, 33 changer transitions 0/369 dead transitions. [2024-06-04 16:19:18,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 369 transitions, 5177 flow [2024-06-04 16:19:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:18,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-04 16:19:18,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608974358974359 [2024-06-04 16:19:18,954 INFO L175 Difference]: Start difference. First operand has 215 places, 338 transitions, 4332 flow. Second operand 6 states and 175 transitions. [2024-06-04 16:19:18,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 369 transitions, 5177 flow [2024-06-04 16:19:20,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 369 transitions, 5040 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:19:20,309 INFO L231 Difference]: Finished difference. Result has 218 places, 340 transitions, 4297 flow [2024-06-04 16:19:20,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4297, PETRI_PLACES=218, PETRI_TRANSITIONS=340} [2024-06-04 16:19:20,310 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 163 predicate places. [2024-06-04 16:19:20,310 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 340 transitions, 4297 flow [2024-06-04 16:19:20,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:20,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:20,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:20,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:19:20,311 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:20,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash -44174910, now seen corresponding path program 5 times [2024-06-04 16:19:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:20,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516778358] [2024-06-04 16:19:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:20,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:20,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516778358] [2024-06-04 16:19:20,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516778358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:20,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779802006] [2024-06-04 16:19:20,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:20,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:21,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:21,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 340 transitions, 4297 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:21,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:21,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:21,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:23,051 INFO L124 PetriNetUnfolderBase]: 8485/12413 cut-off events. [2024-06-04 16:19:23,052 INFO L125 PetriNetUnfolderBase]: For 637099/637126 co-relation queries the response was YES. [2024-06-04 16:19:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88290 conditions, 12413 events. 8485/12413 cut-off events. For 637099/637126 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73394 event pairs, 2579 based on Foata normal form. 34/12442 useless extension candidates. Maximal degree in co-relation 88184. Up to 11397 conditions per place. [2024-06-04 16:19:23,184 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 334 selfloop transitions, 35 changer transitions 0/377 dead transitions. [2024-06-04 16:19:23,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 377 transitions, 5178 flow [2024-06-04 16:19:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:23,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 16:19:23,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5801282051282052 [2024-06-04 16:19:23,199 INFO L175 Difference]: Start difference. First operand has 218 places, 340 transitions, 4297 flow. Second operand 6 states and 181 transitions. [2024-06-04 16:19:23,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 377 transitions, 5178 flow [2024-06-04 16:19:24,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 377 transitions, 5108 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:19:24,529 INFO L231 Difference]: Finished difference. Result has 220 places, 342 transitions, 4341 flow [2024-06-04 16:19:24,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4227, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4341, PETRI_PLACES=220, PETRI_TRANSITIONS=342} [2024-06-04 16:19:24,529 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 165 predicate places. [2024-06-04 16:19:24,530 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 342 transitions, 4341 flow [2024-06-04 16:19:24,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:24,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:24,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:24,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:19:24,530 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:24,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:24,531 INFO L85 PathProgramCache]: Analyzing trace with hash -44501340, now seen corresponding path program 6 times [2024-06-04 16:19:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693584940] [2024-06-04 16:19:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:24,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:25,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:25,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693584940] [2024-06-04 16:19:25,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693584940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:25,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:25,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:25,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399365416] [2024-06-04 16:19:25,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:25,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:25,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:25,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:25,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 342 transitions, 4341 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:25,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:25,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:25,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:27,202 INFO L124 PetriNetUnfolderBase]: 8453/12356 cut-off events. [2024-06-04 16:19:27,202 INFO L125 PetriNetUnfolderBase]: For 650045/650072 co-relation queries the response was YES. [2024-06-04 16:19:27,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88271 conditions, 12356 events. 8453/12356 cut-off events. For 650045/650072 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72906 event pairs, 2071 based on Foata normal form. 30/12381 useless extension candidates. Maximal degree in co-relation 88164. Up to 10953 conditions per place. [2024-06-04 16:19:27,346 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 326 selfloop transitions, 51 changer transitions 0/385 dead transitions. [2024-06-04 16:19:27,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 385 transitions, 5260 flow [2024-06-04 16:19:27,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-04 16:19:27,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993589743589743 [2024-06-04 16:19:27,348 INFO L175 Difference]: Start difference. First operand has 220 places, 342 transitions, 4341 flow. Second operand 6 states and 187 transitions. [2024-06-04 16:19:27,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 385 transitions, 5260 flow [2024-06-04 16:19:28,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 385 transitions, 5199 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:19:28,776 INFO L231 Difference]: Finished difference. Result has 224 places, 344 transitions, 4450 flow [2024-06-04 16:19:28,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4282, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4450, PETRI_PLACES=224, PETRI_TRANSITIONS=344} [2024-06-04 16:19:28,777 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 169 predicate places. [2024-06-04 16:19:28,777 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 344 transitions, 4450 flow [2024-06-04 16:19:28,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:28,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:28,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:28,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:19:28,778 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:28,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:28,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1350040266, now seen corresponding path program 4 times [2024-06-04 16:19:28,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:28,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104946216] [2024-06-04 16:19:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:28,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:29,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:29,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104946216] [2024-06-04 16:19:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104946216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:29,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:29,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67860006] [2024-06-04 16:19:29,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:29,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:29,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:29,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:29,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 344 transitions, 4450 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:29,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:29,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:29,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:31,359 INFO L124 PetriNetUnfolderBase]: 8062/11878 cut-off events. [2024-06-04 16:19:31,359 INFO L125 PetriNetUnfolderBase]: For 739522/740875 co-relation queries the response was YES. [2024-06-04 16:19:31,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90585 conditions, 11878 events. 8062/11878 cut-off events. For 739522/740875 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71723 event pairs, 2287 based on Foata normal form. 140/11645 useless extension candidates. Maximal degree in co-relation 90476. Up to 10490 conditions per place. [2024-06-04 16:19:31,504 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 248 selfloop transitions, 112 changer transitions 0/402 dead transitions. [2024-06-04 16:19:31,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 402 transitions, 5794 flow [2024-06-04 16:19:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:19:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:19:31,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 16:19:31,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 16:19:31,505 INFO L175 Difference]: Start difference. First operand has 224 places, 344 transitions, 4450 flow. Second operand 8 states and 251 transitions. [2024-06-04 16:19:31,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 402 transitions, 5794 flow [2024-06-04 16:19:32,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 402 transitions, 5682 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-04 16:19:32,982 INFO L231 Difference]: Finished difference. Result has 227 places, 352 transitions, 4727 flow [2024-06-04 16:19:32,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4354, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4727, PETRI_PLACES=227, PETRI_TRANSITIONS=352} [2024-06-04 16:19:32,982 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 172 predicate places. [2024-06-04 16:19:32,983 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 352 transitions, 4727 flow [2024-06-04 16:19:32,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:32,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:32,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:32,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:19:32,983 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:32,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -363369228, now seen corresponding path program 5 times [2024-06-04 16:19:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:32,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837635561] [2024-06-04 16:19:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:32,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837635561] [2024-06-04 16:19:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837635561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136287409] [2024-06-04 16:19:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:33,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:33,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 352 transitions, 4727 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:33,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:33,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:33,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:35,658 INFO L124 PetriNetUnfolderBase]: 8115/11961 cut-off events. [2024-06-04 16:19:35,659 INFO L125 PetriNetUnfolderBase]: For 717635/719018 co-relation queries the response was YES. [2024-06-04 16:19:35,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90589 conditions, 11961 events. 8115/11961 cut-off events. For 717635/719018 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 72362 event pairs, 2287 based on Foata normal form. 168/11756 useless extension candidates. Maximal degree in co-relation 90481. Up to 10545 conditions per place. [2024-06-04 16:19:35,808 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 247 selfloop transitions, 123 changer transitions 0/412 dead transitions. [2024-06-04 16:19:35,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 412 transitions, 6105 flow [2024-06-04 16:19:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:19:35,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:19:35,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-06-04 16:19:35,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:19:35,809 INFO L175 Difference]: Start difference. First operand has 227 places, 352 transitions, 4727 flow. Second operand 9 states and 273 transitions. [2024-06-04 16:19:35,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 412 transitions, 6105 flow [2024-06-04 16:19:37,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 412 transitions, 5728 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-04 16:19:37,667 INFO L231 Difference]: Finished difference. Result has 231 places, 360 transitions, 4762 flow [2024-06-04 16:19:37,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4394, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4762, PETRI_PLACES=231, PETRI_TRANSITIONS=360} [2024-06-04 16:19:37,667 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 176 predicate places. [2024-06-04 16:19:37,667 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 360 transitions, 4762 flow [2024-06-04 16:19:37,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:37,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:37,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:37,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:19:37,668 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:37,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash -369030138, now seen corresponding path program 6 times [2024-06-04 16:19:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:37,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257535428] [2024-06-04 16:19:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:37,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:37,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:38,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:38,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257535428] [2024-06-04 16:19:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257535428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973958249] [2024-06-04 16:19:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:38,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:38,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:38,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:38,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 360 transitions, 4762 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:38,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:38,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:40,227 INFO L124 PetriNetUnfolderBase]: 8084/11913 cut-off events. [2024-06-04 16:19:40,227 INFO L125 PetriNetUnfolderBase]: For 738304/739661 co-relation queries the response was YES. [2024-06-04 16:19:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90574 conditions, 11913 events. 8084/11913 cut-off events. For 738304/739661 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72008 event pairs, 2317 based on Foata normal form. 146/11665 useless extension candidates. Maximal degree in co-relation 90465. Up to 10506 conditions per place. [2024-06-04 16:19:40,383 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 242 selfloop transitions, 112 changer transitions 0/396 dead transitions. [2024-06-04 16:19:40,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 396 transitions, 5918 flow [2024-06-04 16:19:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-04 16:19:40,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6217948717948718 [2024-06-04 16:19:40,385 INFO L175 Difference]: Start difference. First operand has 231 places, 360 transitions, 4762 flow. Second operand 6 states and 194 transitions. [2024-06-04 16:19:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 396 transitions, 5918 flow [2024-06-04 16:19:41,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 396 transitions, 5646 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-04 16:19:41,942 INFO L231 Difference]: Finished difference. Result has 232 places, 360 transitions, 4723 flow [2024-06-04 16:19:41,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4723, PETRI_PLACES=232, PETRI_TRANSITIONS=360} [2024-06-04 16:19:41,943 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 177 predicate places. [2024-06-04 16:19:41,943 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 360 transitions, 4723 flow [2024-06-04 16:19:41,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:41,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:41,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:41,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:19:41,944 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:41,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:41,944 INFO L85 PathProgramCache]: Analyzing trace with hash -368909982, now seen corresponding path program 4 times [2024-06-04 16:19:41,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:41,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988614337] [2024-06-04 16:19:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:41,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988614337] [2024-06-04 16:19:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988614337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:42,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:42,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505406228] [2024-06-04 16:19:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:42,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:42,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:42,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 360 transitions, 4723 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:42,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:42,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:42,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:44,551 INFO L124 PetriNetUnfolderBase]: 8549/12506 cut-off events. [2024-06-04 16:19:44,551 INFO L125 PetriNetUnfolderBase]: For 696335/696379 co-relation queries the response was YES. [2024-06-04 16:19:44,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90578 conditions, 12506 events. 8549/12506 cut-off events. For 696335/696379 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74095 event pairs, 2614 based on Foata normal form. 35/12534 useless extension candidates. Maximal degree in co-relation 90468. Up to 11500 conditions per place. [2024-06-04 16:19:44,933 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 329 selfloop transitions, 57 changer transitions 0/394 dead transitions. [2024-06-04 16:19:44,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 394 transitions, 5780 flow [2024-06-04 16:19:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:44,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 16:19:44,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-04 16:19:44,945 INFO L175 Difference]: Start difference. First operand has 232 places, 360 transitions, 4723 flow. Second operand 6 states and 185 transitions. [2024-06-04 16:19:44,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 394 transitions, 5780 flow [2024-06-04 16:19:46,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 394 transitions, 5532 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:19:46,714 INFO L231 Difference]: Finished difference. Result has 233 places, 360 transitions, 4605 flow [2024-06-04 16:19:46,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4605, PETRI_PLACES=233, PETRI_TRANSITIONS=360} [2024-06-04 16:19:46,715 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 178 predicate places. [2024-06-04 16:19:46,715 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 360 transitions, 4605 flow [2024-06-04 16:19:46,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:46,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:46,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:19:46,716 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:46,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -368910168, now seen corresponding path program 7 times [2024-06-04 16:19:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73491301] [2024-06-04 16:19:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:47,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73491301] [2024-06-04 16:19:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73491301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:47,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:47,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525927215] [2024-06-04 16:19:47,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:47,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:47,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:47,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 360 transitions, 4605 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:47,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:47,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:47,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:49,607 INFO L124 PetriNetUnfolderBase]: 8073/11906 cut-off events. [2024-06-04 16:19:49,607 INFO L125 PetriNetUnfolderBase]: For 789212/790545 co-relation queries the response was YES. [2024-06-04 16:19:49,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91109 conditions, 11906 events. 8073/11906 cut-off events. For 789212/790545 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72017 event pairs, 2285 based on Foata normal form. 82/11615 useless extension candidates. Maximal degree in co-relation 90998. Up to 10692 conditions per place. [2024-06-04 16:19:49,777 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 269 selfloop transitions, 77 changer transitions 0/388 dead transitions. [2024-06-04 16:19:49,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 388 transitions, 5369 flow [2024-06-04 16:19:49,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:49,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 16:19:49,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-04 16:19:49,778 INFO L175 Difference]: Start difference. First operand has 233 places, 360 transitions, 4605 flow. Second operand 6 states and 185 transitions. [2024-06-04 16:19:49,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 388 transitions, 5369 flow [2024-06-04 16:19:51,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 388 transitions, 5195 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-04 16:19:51,654 INFO L231 Difference]: Finished difference. Result has 234 places, 360 transitions, 4595 flow [2024-06-04 16:19:51,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4595, PETRI_PLACES=234, PETRI_TRANSITIONS=360} [2024-06-04 16:19:51,655 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 179 predicate places. [2024-06-04 16:19:51,655 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 360 transitions, 4595 flow [2024-06-04 16:19:51,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:51,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:51,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:51,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:19:51,656 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:51,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:51,657 INFO L85 PathProgramCache]: Analyzing trace with hash 613627578, now seen corresponding path program 5 times [2024-06-04 16:19:51,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:51,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618812850] [2024-06-04 16:19:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:51,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:52,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:52,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618812850] [2024-06-04 16:19:52,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618812850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:52,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:52,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:52,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973433740] [2024-06-04 16:19:52,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:52,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:52,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:52,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:19:52,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 360 transitions, 4595 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:52,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:52,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:19:52,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:54,498 INFO L124 PetriNetUnfolderBase]: 8554/12519 cut-off events. [2024-06-04 16:19:54,499 INFO L125 PetriNetUnfolderBase]: For 746721/746765 co-relation queries the response was YES. [2024-06-04 16:19:54,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91415 conditions, 12519 events. 8554/12519 cut-off events. For 746721/746765 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74262 event pairs, 2597 based on Foata normal form. 37/12550 useless extension candidates. Maximal degree in co-relation 91303. Up to 11503 conditions per place. [2024-06-04 16:19:54,641 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 329 selfloop transitions, 66 changer transitions 0/403 dead transitions. [2024-06-04 16:19:54,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 403 transitions, 5761 flow [2024-06-04 16:19:54,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:19:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:19:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-06-04 16:19:54,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5741758241758241 [2024-06-04 16:19:54,642 INFO L175 Difference]: Start difference. First operand has 234 places, 360 transitions, 4595 flow. Second operand 7 states and 209 transitions. [2024-06-04 16:19:54,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 403 transitions, 5761 flow [2024-06-04 16:19:56,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 403 transitions, 5551 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:19:56,510 INFO L231 Difference]: Finished difference. Result has 236 places, 366 transitions, 4642 flow [2024-06-04 16:19:56,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4387, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4642, PETRI_PLACES=236, PETRI_TRANSITIONS=366} [2024-06-04 16:19:56,511 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-04 16:19:56,511 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 366 transitions, 4642 flow [2024-06-04 16:19:56,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:56,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:19:56,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:19:56,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:19:56,512 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:19:56,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:19:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 613621812, now seen corresponding path program 8 times [2024-06-04 16:19:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:19:56,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141502168] [2024-06-04 16:19:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:19:56,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:19:56,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:19:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:19:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:19:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141502168] [2024-06-04 16:19:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141502168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:19:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:19:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:19:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859442719] [2024-06-04 16:19:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:19:57,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:19:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:19:57,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:19:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:19:57,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:19:57,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 366 transitions, 4642 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:19:57,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:19:57,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:19:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:19:59,404 INFO L124 PetriNetUnfolderBase]: 8080/11920 cut-off events. [2024-06-04 16:19:59,404 INFO L125 PetriNetUnfolderBase]: For 845226/846566 co-relation queries the response was YES. [2024-06-04 16:19:59,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92403 conditions, 11920 events. 8080/11920 cut-off events. For 845226/846566 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 72098 event pairs, 2285 based on Foata normal form. 128/11675 useless extension candidates. Maximal degree in co-relation 92290. Up to 10567 conditions per place. [2024-06-04 16:19:59,548 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 254 selfloop transitions, 105 changer transitions 0/403 dead transitions. [2024-06-04 16:19:59,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 403 transitions, 5650 flow [2024-06-04 16:19:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:19:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:19:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-04 16:19:59,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6282051282051282 [2024-06-04 16:19:59,549 INFO L175 Difference]: Start difference. First operand has 236 places, 366 transitions, 4642 flow. Second operand 6 states and 196 transitions. [2024-06-04 16:19:59,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 403 transitions, 5650 flow [2024-06-04 16:20:01,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 403 transitions, 5499 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 16:20:01,399 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 4721 flow [2024-06-04 16:20:01,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4721, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-04 16:20:01,400 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 183 predicate places. [2024-06-04 16:20:01,400 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 4721 flow [2024-06-04 16:20:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:01,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:01,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:01,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:20:01,401 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:01,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash 613616418, now seen corresponding path program 6 times [2024-06-04 16:20:01,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:01,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378742202] [2024-06-04 16:20:01,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:01,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:02,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378742202] [2024-06-04 16:20:02,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378742202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:02,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:02,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:02,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979718045] [2024-06-04 16:20:02,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:02,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:02,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:02,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:02,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:02,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:20:02,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 4721 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:02,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:02,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:20:02,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:04,200 INFO L124 PetriNetUnfolderBase]: 8536/12495 cut-off events. [2024-06-04 16:20:04,201 INFO L125 PetriNetUnfolderBase]: For 770675/770719 co-relation queries the response was YES. [2024-06-04 16:20:04,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91819 conditions, 12495 events. 8536/12495 cut-off events. For 770675/770719 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 74152 event pairs, 2613 based on Foata normal form. 35/12523 useless extension candidates. Maximal degree in co-relation 91706. Up to 11482 conditions per place. [2024-06-04 16:20:04,359 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 323 selfloop transitions, 62 changer transitions 0/393 dead transitions. [2024-06-04 16:20:04,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 393 transitions, 5568 flow [2024-06-04 16:20:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:20:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:20:04,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 16:20:04,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6076923076923076 [2024-06-04 16:20:04,361 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 4721 flow. Second operand 5 states and 158 transitions. [2024-06-04 16:20:04,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 393 transitions, 5568 flow [2024-06-04 16:20:06,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 393 transitions, 5298 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:20:06,135 INFO L231 Difference]: Finished difference. Result has 236 places, 366 transitions, 4599 flow [2024-06-04 16:20:06,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4451, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4599, PETRI_PLACES=236, PETRI_TRANSITIONS=366} [2024-06-04 16:20:06,136 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-04 16:20:06,136 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 366 transitions, 4599 flow [2024-06-04 16:20:06,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:06,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:06,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:06,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:20:06,137 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:06,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:06,137 INFO L85 PathProgramCache]: Analyzing trace with hash 613616232, now seen corresponding path program 9 times [2024-06-04 16:20:06,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:06,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532480683] [2024-06-04 16:20:06,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:06,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:06,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:06,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532480683] [2024-06-04 16:20:06,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532480683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:06,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:06,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:06,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50791594] [2024-06-04 16:20:06,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:06,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:06,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:20:06,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 366 transitions, 4599 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:06,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:06,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:20:06,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:08,935 INFO L124 PetriNetUnfolderBase]: 8062/11897 cut-off events. [2024-06-04 16:20:08,936 INFO L125 PetriNetUnfolderBase]: For 838762/840102 co-relation queries the response was YES. [2024-06-04 16:20:09,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91889 conditions, 11897 events. 8062/11897 cut-off events. For 838762/840102 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 72060 event pairs, 2284 based on Foata normal form. 128/11652 useless extension candidates. Maximal degree in co-relation 91776. Up to 10549 conditions per place. [2024-06-04 16:20:09,064 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 259 selfloop transitions, 105 changer transitions 0/408 dead transitions. [2024-06-04 16:20:09,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 408 transitions, 5437 flow [2024-06-04 16:20:09,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 16:20:09,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6098901098901099 [2024-06-04 16:20:09,066 INFO L175 Difference]: Start difference. First operand has 236 places, 366 transitions, 4599 flow. Second operand 7 states and 222 transitions. [2024-06-04 16:20:09,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 408 transitions, 5437 flow [2024-06-04 16:20:10,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 408 transitions, 5261 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:10,657 INFO L231 Difference]: Finished difference. Result has 237 places, 366 transitions, 4655 flow [2024-06-04 16:20:10,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4423, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4655, PETRI_PLACES=237, PETRI_TRANSITIONS=366} [2024-06-04 16:20:10,658 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 182 predicate places. [2024-06-04 16:20:10,658 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 366 transitions, 4655 flow [2024-06-04 16:20:10,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:10,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:10,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:10,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:20:10,659 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:10,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash -33447174, now seen corresponding path program 7 times [2024-06-04 16:20:10,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:10,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079609770] [2024-06-04 16:20:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:10,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:11,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:11,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079609770] [2024-06-04 16:20:11,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079609770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:11,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:11,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672384320] [2024-06-04 16:20:11,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:11,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:11,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:11,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:20:11,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 366 transitions, 4655 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:11,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:11,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:20:11,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:13,438 INFO L124 PetriNetUnfolderBase]: 8541/12505 cut-off events. [2024-06-04 16:20:13,439 INFO L125 PetriNetUnfolderBase]: For 740584/740600 co-relation queries the response was YES. [2024-06-04 16:20:13,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91049 conditions, 12505 events. 8541/12505 cut-off events. For 740584/740600 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 74319 event pairs, 2648 based on Foata normal form. 16/12511 useless extension candidates. Maximal degree in co-relation 90937. Up to 11395 conditions per place. [2024-06-04 16:20:13,594 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 300 selfloop transitions, 91 changer transitions 0/399 dead transitions. [2024-06-04 16:20:13,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 399 transitions, 5771 flow [2024-06-04 16:20:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:20:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:20:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-04 16:20:13,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-04 16:20:13,596 INFO L175 Difference]: Start difference. First operand has 237 places, 366 transitions, 4655 flow. Second operand 6 states and 178 transitions. [2024-06-04 16:20:13,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 399 transitions, 5771 flow [2024-06-04 16:20:15,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 399 transitions, 5533 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:15,317 INFO L231 Difference]: Finished difference. Result has 236 places, 372 transitions, 4729 flow [2024-06-04 16:20:15,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4425, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4729, PETRI_PLACES=236, PETRI_TRANSITIONS=372} [2024-06-04 16:20:15,318 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 181 predicate places. [2024-06-04 16:20:15,318 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 372 transitions, 4729 flow [2024-06-04 16:20:15,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:15,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:15,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:15,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:20:15,319 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:15,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:15,323 INFO L85 PathProgramCache]: Analyzing trace with hash -44409270, now seen corresponding path program 10 times [2024-06-04 16:20:15,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:15,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290791548] [2024-06-04 16:20:15,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:15,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:15,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:15,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290791548] [2024-06-04 16:20:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290791548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603495879] [2024-06-04 16:20:15,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:15,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:15,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:16,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:20:16,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 372 transitions, 4729 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:16,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:16,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:20:16,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:18,222 INFO L124 PetriNetUnfolderBase]: 8069/11906 cut-off events. [2024-06-04 16:20:18,223 INFO L125 PetriNetUnfolderBase]: For 775650/776985 co-relation queries the response was YES. [2024-06-04 16:20:18,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90808 conditions, 11906 events. 8069/11906 cut-off events. For 775650/776985 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 72145 event pairs, 2283 based on Foata normal form. 151/11684 useless extension candidates. Maximal degree in co-relation 90696. Up to 10457 conditions per place. [2024-06-04 16:20:18,352 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 228 selfloop transitions, 147 changer transitions 0/421 dead transitions. [2024-06-04 16:20:18,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 421 transitions, 5607 flow [2024-06-04 16:20:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:20:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:20:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 251 transitions. [2024-06-04 16:20:18,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033653846153846 [2024-06-04 16:20:18,353 INFO L175 Difference]: Start difference. First operand has 236 places, 372 transitions, 4729 flow. Second operand 8 states and 251 transitions. [2024-06-04 16:20:18,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 421 transitions, 5607 flow [2024-06-04 16:20:19,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 421 transitions, 5460 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 16:20:19,879 INFO L231 Difference]: Finished difference. Result has 242 places, 372 transitions, 4904 flow [2024-06-04 16:20:19,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4582, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4904, PETRI_PLACES=242, PETRI_TRANSITIONS=372} [2024-06-04 16:20:19,879 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-04 16:20:19,879 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 372 transitions, 4904 flow [2024-06-04 16:20:19,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:19,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:19,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:19,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:20:19,880 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:19,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:19,881 INFO L85 PathProgramCache]: Analyzing trace with hash -44171934, now seen corresponding path program 8 times [2024-06-04 16:20:19,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:19,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659394300] [2024-06-04 16:20:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:19,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:20,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:20,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659394300] [2024-06-04 16:20:20,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659394300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:20,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:20,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:20,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216380581] [2024-06-04 16:20:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:20,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:20,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:20:20,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 372 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:20:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:22,831 INFO L124 PetriNetUnfolderBase]: 8546/12514 cut-off events. [2024-06-04 16:20:22,831 INFO L125 PetriNetUnfolderBase]: For 736831/736875 co-relation queries the response was YES. [2024-06-04 16:20:22,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91320 conditions, 12514 events. 8546/12514 cut-off events. For 736831/736875 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74392 event pairs, 2611 based on Foata normal form. 35/12542 useless extension candidates. Maximal degree in co-relation 91206. Up to 11398 conditions per place. [2024-06-04 16:20:22,962 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 305 selfloop transitions, 96 changer transitions 0/409 dead transitions. [2024-06-04 16:20:22,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 409 transitions, 6033 flow [2024-06-04 16:20:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:20:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:20:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-04 16:20:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897435897435898 [2024-06-04 16:20:22,964 INFO L175 Difference]: Start difference. First operand has 242 places, 372 transitions, 4904 flow. Second operand 6 states and 184 transitions. [2024-06-04 16:20:22,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 409 transitions, 6033 flow [2024-06-04 16:20:24,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 409 transitions, 5709 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:20:24,726 INFO L231 Difference]: Finished difference. Result has 240 places, 376 transitions, 4844 flow [2024-06-04 16:20:24,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4592, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4844, PETRI_PLACES=240, PETRI_TRANSITIONS=376} [2024-06-04 16:20:24,727 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 185 predicate places. [2024-06-04 16:20:24,727 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 376 transitions, 4844 flow [2024-06-04 16:20:24,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:24,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:24,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:20:24,728 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:24,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:24,730 INFO L85 PathProgramCache]: Analyzing trace with hash -44409084, now seen corresponding path program 9 times [2024-06-04 16:20:24,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:24,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595017628] [2024-06-04 16:20:24,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:24,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:25,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:25,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595017628] [2024-06-04 16:20:25,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595017628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:25,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:25,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:25,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893719355] [2024-06-04 16:20:25,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:25,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:25,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:25,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:20:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 376 transitions, 4844 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:25,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:25,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:20:25,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:27,817 INFO L124 PetriNetUnfolderBase]: 8539/12505 cut-off events. [2024-06-04 16:20:27,818 INFO L125 PetriNetUnfolderBase]: For 680143/680187 co-relation queries the response was YES. [2024-06-04 16:20:27,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89829 conditions, 12505 events. 8539/12505 cut-off events. For 680143/680187 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 74148 event pairs, 2611 based on Foata normal form. 35/12533 useless extension candidates. Maximal degree in co-relation 89715. Up to 11391 conditions per place. [2024-06-04 16:20:27,946 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 306 selfloop transitions, 96 changer transitions 0/410 dead transitions. [2024-06-04 16:20:27,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 410 transitions, 5743 flow [2024-06-04 16:20:27,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:20:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:20:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-04 16:20:27,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-06-04 16:20:27,947 INFO L175 Difference]: Start difference. First operand has 240 places, 376 transitions, 4844 flow. Second operand 6 states and 186 transitions. [2024-06-04 16:20:27,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 410 transitions, 5743 flow [2024-06-04 16:20:29,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 410 transitions, 5555 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:20:29,229 INFO L231 Difference]: Finished difference. Result has 242 places, 376 transitions, 4867 flow [2024-06-04 16:20:29,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4656, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4867, PETRI_PLACES=242, PETRI_TRANSITIONS=376} [2024-06-04 16:20:29,230 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 187 predicate places. [2024-06-04 16:20:29,230 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 376 transitions, 4867 flow [2024-06-04 16:20:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:29,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:29,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:20:29,231 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -33050436, now seen corresponding path program 1 times [2024-06-04 16:20:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712341977] [2024-06-04 16:20:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:29,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:29,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:29,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712341977] [2024-06-04 16:20:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712341977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:29,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:29,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:29,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580639807] [2024-06-04 16:20:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:29,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:29,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:29,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:29,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-04 16:20:29,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 376 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:29,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:29,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-04 16:20:29,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:32,270 INFO L124 PetriNetUnfolderBase]: 8507/12460 cut-off events. [2024-06-04 16:20:32,271 INFO L125 PetriNetUnfolderBase]: For 679201/679203 co-relation queries the response was YES. [2024-06-04 16:20:32,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89094 conditions, 12460 events. 8507/12460 cut-off events. For 679201/679203 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 73771 event pairs, 2505 based on Foata normal form. 14/12467 useless extension candidates. Maximal degree in co-relation 88980. Up to 11216 conditions per place. [2024-06-04 16:20:32,401 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 365 selfloop transitions, 41 changer transitions 0/414 dead transitions. [2024-06-04 16:20:32,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 414 transitions, 5840 flow [2024-06-04 16:20:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:20:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:20:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-06-04 16:20:32,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2024-06-04 16:20:32,403 INFO L175 Difference]: Start difference. First operand has 242 places, 376 transitions, 4867 flow. Second operand 6 states and 178 transitions. [2024-06-04 16:20:32,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 414 transitions, 5840 flow [2024-06-04 16:20:33,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 414 transitions, 5642 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:20:33,904 INFO L231 Difference]: Finished difference. Result has 243 places, 381 transitions, 4822 flow [2024-06-04 16:20:33,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4822, PETRI_PLACES=243, PETRI_TRANSITIONS=381} [2024-06-04 16:20:33,905 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 188 predicate places. [2024-06-04 16:20:33,906 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 381 transitions, 4822 flow [2024-06-04 16:20:33,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:33,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:33,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:33,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:20:33,908 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:33,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:33,908 INFO L85 PathProgramCache]: Analyzing trace with hash 599147114, now seen corresponding path program 1 times [2024-06-04 16:20:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:33,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955388942] [2024-06-04 16:20:33,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:33,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955388942] [2024-06-04 16:20:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955388942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:34,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:34,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:34,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413822807] [2024-06-04 16:20:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:34,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:34,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:20:34,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 381 transitions, 4822 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:34,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:34,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:20:34,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:36,900 INFO L124 PetriNetUnfolderBase]: 7752/11549 cut-off events. [2024-06-04 16:20:36,900 INFO L125 PetriNetUnfolderBase]: For 693665/693819 co-relation queries the response was YES. [2024-06-04 16:20:36,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86177 conditions, 11549 events. 7752/11549 cut-off events. For 693665/693819 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 70847 event pairs, 2364 based on Foata normal form. 65/11385 useless extension candidates. Maximal degree in co-relation 86063. Up to 10124 conditions per place. [2024-06-04 16:20:37,048 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 296 selfloop transitions, 41 changer transitions 0/396 dead transitions. [2024-06-04 16:20:37,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 396 transitions, 5582 flow [2024-06-04 16:20:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:20:37,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:20:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-06-04 16:20:37,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6009615384615384 [2024-06-04 16:20:37,049 INFO L175 Difference]: Start difference. First operand has 243 places, 381 transitions, 4822 flow. Second operand 4 states and 125 transitions. [2024-06-04 16:20:37,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 396 transitions, 5582 flow [2024-06-04 16:20:38,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 396 transitions, 5547 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-04 16:20:38,538 INFO L231 Difference]: Finished difference. Result has 246 places, 385 transitions, 4953 flow [2024-06-04 16:20:38,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4787, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4953, PETRI_PLACES=246, PETRI_TRANSITIONS=385} [2024-06-04 16:20:38,538 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 191 predicate places. [2024-06-04 16:20:38,538 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 385 transitions, 4953 flow [2024-06-04 16:20:38,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:38,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:38,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:20:38,539 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:38,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:38,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1780799916, now seen corresponding path program 2 times [2024-06-04 16:20:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:38,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429756492] [2024-06-04 16:20:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429756492] [2024-06-04 16:20:39,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429756492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:39,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:39,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:20:39,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482656570] [2024-06-04 16:20:39,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:39,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:20:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:39,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:20:39,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:20:39,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-04 16:20:39,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 385 transitions, 4953 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:39,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:39,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-04 16:20:39,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:41,756 INFO L124 PetriNetUnfolderBase]: 7736/11489 cut-off events. [2024-06-04 16:20:41,756 INFO L125 PetriNetUnfolderBase]: For 717427/717581 co-relation queries the response was YES. [2024-06-04 16:20:41,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 11489 events. 7736/11489 cut-off events. For 717427/717581 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 70068 event pairs, 2364 based on Foata normal form. 65/11325 useless extension candidates. Maximal degree in co-relation 87690. Up to 10096 conditions per place. [2024-06-04 16:20:41,890 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 297 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-04 16:20:41,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 401 transitions, 5733 flow [2024-06-04 16:20:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:20:41,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:20:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-04 16:20:41,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2024-06-04 16:20:41,891 INFO L175 Difference]: Start difference. First operand has 246 places, 385 transitions, 4953 flow. Second operand 5 states and 148 transitions. [2024-06-04 16:20:41,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 401 transitions, 5733 flow [2024-06-04 16:20:43,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 401 transitions, 5596 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-04 16:20:43,120 INFO L231 Difference]: Finished difference. Result has 248 places, 389 transitions, 4987 flow [2024-06-04 16:20:43,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4822, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4987, PETRI_PLACES=248, PETRI_TRANSITIONS=389} [2024-06-04 16:20:43,121 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 193 predicate places. [2024-06-04 16:20:43,121 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 389 transitions, 4987 flow [2024-06-04 16:20:43,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:43,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:43,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:43,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:20:43,122 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:43,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash 105682952, now seen corresponding path program 1 times [2024-06-04 16:20:43,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:43,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997015780] [2024-06-04 16:20:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:43,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997015780] [2024-06-04 16:20:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997015780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839378708] [2024-06-04 16:20:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:43,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:43,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:44,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:20:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 389 transitions, 4987 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:44,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:44,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:20:44,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:20:46,359 INFO L124 PetriNetUnfolderBase]: 8300/12394 cut-off events. [2024-06-04 16:20:46,359 INFO L125 PetriNetUnfolderBase]: For 714367/714377 co-relation queries the response was YES. [2024-06-04 16:20:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92779 conditions, 12394 events. 8300/12394 cut-off events. For 714367/714377 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 75850 event pairs, 2387 based on Foata normal form. 30/12418 useless extension candidates. Maximal degree in co-relation 92661. Up to 10750 conditions per place. [2024-06-04 16:20:46,505 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 385 selfloop transitions, 49 changer transitions 0/445 dead transitions. [2024-06-04 16:20:46,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 445 transitions, 6316 flow [2024-06-04 16:20:46,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:20:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:20:46,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 216 transitions. [2024-06-04 16:20:46,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934065934065934 [2024-06-04 16:20:46,506 INFO L175 Difference]: Start difference. First operand has 248 places, 389 transitions, 4987 flow. Second operand 7 states and 216 transitions. [2024-06-04 16:20:46,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 445 transitions, 6316 flow [2024-06-04 16:20:48,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 445 transitions, 6183 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 16:20:48,157 INFO L231 Difference]: Finished difference. Result has 254 places, 400 transitions, 5131 flow [2024-06-04 16:20:48,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5131, PETRI_PLACES=254, PETRI_TRANSITIONS=400} [2024-06-04 16:20:48,159 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 199 predicate places. [2024-06-04 16:20:48,159 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 400 transitions, 5131 flow [2024-06-04 16:20:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:48,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:20:48,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:20:48,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:20:48,159 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:20:48,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:20:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 548518920, now seen corresponding path program 2 times [2024-06-04 16:20:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:20:48,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686839320] [2024-06-04 16:20:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:20:48,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:20:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:20:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:20:48,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:20:48,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686839320] [2024-06-04 16:20:48,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686839320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:20:48,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:20:48,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:20:48,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241464905] [2024-06-04 16:20:48,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:20:48,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:20:48,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:20:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:20:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:20:49,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-04 16:20:49,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 400 transitions, 5131 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:20:49,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:20:49,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-04 16:20:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand