./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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-cde23df-m [2024-06-14 13:52:12,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:52:13,027 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:52:13,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:52:13,031 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:52:13,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:52:13,044 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:52:13,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:52:13,045 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:52:13,046 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:52:13,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:52:13,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:52:13,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:52:13,047 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:52:13,047 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:52:13,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:52:13,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:52:13,048 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:52:13,048 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:52:13,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:52:13,049 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:52:13,049 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:52:13,050 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:52:13,050 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:52:13,050 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:52:13,050 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:52:13,050 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:52:13,051 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:52:13,051 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:52:13,051 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:52:13,051 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:52:13,052 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:52:13,052 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:52:13,052 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:52:13,052 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:52:13,053 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:52:13,054 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:52:13,054 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:52:13,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:52:13,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:52:13,265 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:52:13,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:52:13,268 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:52:13,268 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:52:13,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:14,301 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:52:14,511 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:52:14,514 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:14,531 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/255e6be08/17be280513cf4771b02b13efba511d14/FLAGcbd9cc84b [2024-06-14 13:52:14,543 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/255e6be08/17be280513cf4771b02b13efba511d14 [2024-06-14 13:52:14,546 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:52:14,547 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:52:14,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 13:52:14,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:52:14,651 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:52:14,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:52:14,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:52:14,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:52:14,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:52:14" (1/2) ... [2024-06-14 13:52:14,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683256a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:52:14, skipping insertion in model container [2024-06-14 13:52:14,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:52:14" (1/2) ... [2024-06-14 13:52:14,659 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@37d0b39e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:52:14, skipping insertion in model container [2024-06-14 13:52:14,660 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:14" (2/2) ... [2024-06-14 13:52:14,660 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683256a9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:14, skipping insertion in model container [2024-06-14 13:52:14,660 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:14" (2/2) ... [2024-06-14 13:52:14,660 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:52:14,700 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:52:14,701 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 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 )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$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 )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:52:14,701 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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 )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 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)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:52:14,702 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 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 )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$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 )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$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 )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 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)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:52:14,702 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:52:14,702 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 13:52:14,735 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:52:15,001 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:52:15,016 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:52:15,176 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:52:15,225 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:52:15,225 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15 WrapperNode [2024-06-14 13:52:15,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:52:15,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:52:15,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:52:15,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:52:15,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,312 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-14 13:52:15,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:52:15,319 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:52:15,319 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:52:15,320 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:52:15,328 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,350 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]. [2024-06-14 13:52:15,352 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,353 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,380 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,391 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:52:15,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:52:15,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:52:15,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:52:15,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (1/1) ... [2024-06-14 13:52:15,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:52:15,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:52:15,449 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) [2024-06-14 13:52:15,461 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 [2024-06-14 13:52:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:52:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:52:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:52:15,505 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:52:15,505 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:52:15,506 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:52:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:52:15,506 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:52:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:52:15,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:52:15,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:52:15,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:52:15,508 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:52:15,622 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:52:15,624 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:52:15,932 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:52:15,932 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:52:16,022 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:52:16,022 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:52:16,023 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:52:16 BoogieIcfgContainer [2024-06-14 13:52:16,023 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:52:16,025 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:52:16,026 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:52:16,028 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:52:16,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:52:14" (1/4) ... [2024-06-14 13:52:16,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674c0e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:52:16, skipping insertion in model container [2024-06-14 13:52:16,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:52:14" (2/4) ... [2024-06-14 13:52:16,029 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674c0e2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:52:16, skipping insertion in model container [2024-06-14 13:52:16,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:52:15" (3/4) ... [2024-06-14 13:52:16,030 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@674c0e2d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:52:16, skipping insertion in model container [2024-06-14 13:52:16,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:52:16" (4/4) ... [2024-06-14 13:52:16,038 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 13:52:16,051 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:52:16,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:52:16,051 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:52:16,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:52:16,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:52:16,187 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:52:16,187 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:52:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:52:16,189 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:52:16,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:52:16,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:52:16,210 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;@4bee3edb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:52:16,211 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:52:16,214 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:52:16,214 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:52:16,214 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:52:16,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:16,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:52:16,216 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:16,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-14 13:52:16,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:16,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265481591] [2024-06-14 13:52:16,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265481591] [2024-06-14 13:52:16,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265481591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:52:16,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108525055] [2024-06-14 13:52:16,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:52:16,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:52:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:52:17,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 13:52:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 13:52:17,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,224 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-14 13:52:17,224 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 13:52:17,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3897 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-14 13:52:17,235 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:52:17,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 13:52:17,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:52:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:52:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 13:52:17,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 13:52:17,246 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 13:52:17,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 13:52:17,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:17,251 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:52:17,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:52:17,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:52:17,256 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:52:17,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:52:17,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:17,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash -257083245, now seen corresponding path program 1 times [2024-06-14 13:52:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005603562] [2024-06-14 13:52:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005603562] [2024-06-14 13:52:17,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005603562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:17,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317416934] [2024-06-14 13:52:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:17,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:17,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:17,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:17,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:17,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,775 INFO L124 PetriNetUnfolderBase]: 754/1257 cut-off events. [2024-06-14 13:52:17,775 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-14 13:52:17,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1257 events. 754/1257 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6122 event pairs, 318 based on Foata normal form. 6/1260 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-14 13:52:17,782 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-14 13:52:17,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-14 13:52:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:17,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-14 13:52:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-14 13:52:17,786 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 105 transitions. [2024-06-14 13:52:17,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-14 13:52:17,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:17,789 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 13:52:17,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 13:52:17,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:52:17,790 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 13:52:17,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:52:17,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:17,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash 995354032, now seen corresponding path program 1 times [2024-06-14 13:52:17,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278550211] [2024-06-14 13:52:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278550211] [2024-06-14 13:52:18,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278550211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:18,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424654594] [2024-06-14 13:52:18,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:18,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:18,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:18,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:18,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,443 INFO L124 PetriNetUnfolderBase]: 745/1242 cut-off events. [2024-06-14 13:52:18,443 INFO L125 PetriNetUnfolderBase]: For 591/633 co-relation queries the response was YES. [2024-06-14 13:52:18,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1242 events. 745/1242 cut-off events. For 591/633 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6050 event pairs, 218 based on Foata normal form. 19/1258 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-14 13:52:18,449 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-14 13:52:18,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 316 flow [2024-06-14 13:52:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:52:18,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:18,451 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:52:18,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 316 flow [2024-06-14 13:52:18,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 314 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:18,453 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 183 flow [2024-06-14 13:52:18,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-14 13:52:18,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 13:52:18,454 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 183 flow [2024-06-14 13:52:18,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:52:18,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1465943599, now seen corresponding path program 1 times [2024-06-14 13:52:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039754894] [2024-06-14 13:52:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039754894] [2024-06-14 13:52:18,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039754894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:18,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150842784] [2024-06-14 13:52:18,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:18,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:18,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:18,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,047 INFO L124 PetriNetUnfolderBase]: 697/1163 cut-off events. [2024-06-14 13:52:19,047 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-14 13:52:19,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1163 events. 697/1163 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5805 event pairs, 308 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-14 13:52:19,054 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 13:52:19,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 356 flow [2024-06-14 13:52:19,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:19,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 13:52:19,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:19,057 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 183 flow. Second operand 4 states and 100 transitions. [2024-06-14 13:52:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 356 flow [2024-06-14 13:52:19,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 331 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:19,063 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 231 flow [2024-06-14 13:52:19,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-14 13:52:19,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 13:52:19,065 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 231 flow [2024-06-14 13:52:19,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:52:19,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-14 13:52:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441666556] [2024-06-14 13:52:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:19,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:19,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441666556] [2024-06-14 13:52:19,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441666556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:19,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:19,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426213653] [2024-06-14 13:52:19,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:19,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:19,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:19,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:19,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:19,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,721 INFO L124 PetriNetUnfolderBase]: 826/1388 cut-off events. [2024-06-14 13:52:19,722 INFO L125 PetriNetUnfolderBase]: For 1903/1945 co-relation queries the response was YES. [2024-06-14 13:52:19,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 1388 events. 826/1388 cut-off events. For 1903/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6978 event pairs, 293 based on Foata normal form. 16/1385 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-14 13:52:19,729 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-14 13:52:19,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 465 flow [2024-06-14 13:52:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 13:52:19,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-14 13:52:19,731 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 231 flow. Second operand 5 states and 128 transitions. [2024-06-14 13:52:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 465 flow [2024-06-14 13:52:19,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 463 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:19,738 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 311 flow [2024-06-14 13:52:19,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-14 13:52:19,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-14 13:52:19,740 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 311 flow [2024-06-14 13:52:19,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:19,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:19,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:52:19,742 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash 631097172, now seen corresponding path program 2 times [2024-06-14 13:52:19,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771803864] [2024-06-14 13:52:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771803864] [2024-06-14 13:52:20,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771803864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:20,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348669514] [2024-06-14 13:52:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:20,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:20,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:20,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,359 INFO L124 PetriNetUnfolderBase]: 821/1381 cut-off events. [2024-06-14 13:52:20,359 INFO L125 PetriNetUnfolderBase]: For 3010/3058 co-relation queries the response was YES. [2024-06-14 13:52:20,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1381 events. 821/1381 cut-off events. For 3010/3058 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6942 event pairs, 293 based on Foata normal form. 18/1381 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-14 13:52:20,368 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-14 13:52:20,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 471 flow [2024-06-14 13:52:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:20,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-14 13:52:20,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-14 13:52:20,369 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 311 flow. Second operand 4 states and 105 transitions. [2024-06-14 13:52:20,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 471 flow [2024-06-14 13:52:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 446 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:20,376 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 330 flow [2024-06-14 13:52:20,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-14 13:52:20,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 13:52:20,379 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 330 flow [2024-06-14 13:52:20,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:52:20,379 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1033237428, now seen corresponding path program 1 times [2024-06-14 13:52:20,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444527779] [2024-06-14 13:52:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444527779] [2024-06-14 13:52:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444527779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10068281] [2024-06-14 13:52:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:20,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:20,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:20,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:20,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,981 INFO L124 PetriNetUnfolderBase]: 697/1171 cut-off events. [2024-06-14 13:52:20,981 INFO L125 PetriNetUnfolderBase]: For 3078/3080 co-relation queries the response was YES. [2024-06-14 13:52:20,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1171 events. 697/1171 cut-off events. For 3078/3080 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5863 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4027. Up to 1029 conditions per place. [2024-06-14 13:52:20,990 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-14 13:52:20,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 519 flow [2024-06-14 13:52:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:20,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 13:52:20,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 13:52:20,992 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 330 flow. Second operand 5 states and 121 transitions. [2024-06-14 13:52:20,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 519 flow [2024-06-14 13:52:20,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:20,997 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 341 flow [2024-06-14 13:52:20,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 13:52:20,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-14 13:52:20,998 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 341 flow [2024-06-14 13:52:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:52:20,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-14 13:52:20,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718591102] [2024-06-14 13:52:20,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718591102] [2024-06-14 13:52:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718591102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:21,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930128999] [2024-06-14 13:52:21,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:21,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:21,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:21,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,607 INFO L124 PetriNetUnfolderBase]: 888/1472 cut-off events. [2024-06-14 13:52:21,607 INFO L125 PetriNetUnfolderBase]: For 4343/4347 co-relation queries the response was YES. [2024-06-14 13:52:21,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 1472 events. 888/1472 cut-off events. For 4343/4347 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7234 event pairs, 323 based on Foata normal form. 6/1476 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-14 13:52:21,616 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-14 13:52:21,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 695 flow [2024-06-14 13:52:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:21,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:52:21,617 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 341 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:21,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 695 flow [2024-06-14 13:52:21,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 672 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:21,623 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 467 flow [2024-06-14 13:52:21,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 13:52:21,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 13:52:21,624 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 467 flow [2024-06-14 13:52:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:21,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:52:21,625 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1910817844, now seen corresponding path program 2 times [2024-06-14 13:52:21,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523415436] [2024-06-14 13:52:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523415436] [2024-06-14 13:52:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523415436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755839292] [2024-06-14 13:52:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:21,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:21,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 467 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,248 INFO L124 PetriNetUnfolderBase]: 899/1495 cut-off events. [2024-06-14 13:52:22,248 INFO L125 PetriNetUnfolderBase]: For 5629/5639 co-relation queries the response was YES. [2024-06-14 13:52:22,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1495 events. 899/1495 cut-off events. For 5629/5639 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7406 event pairs, 310 based on Foata normal form. 12/1507 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-14 13:52:22,258 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-14 13:52:22,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 815 flow [2024-06-14 13:52:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:52:22,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:52:22,260 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 467 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:52:22,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 815 flow [2024-06-14 13:52:22,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 779 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:22,267 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 525 flow [2024-06-14 13:52:22,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2024-06-14 13:52:22,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 13:52:22,268 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 525 flow [2024-06-14 13:52:22,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:52:22,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1910823424, now seen corresponding path program 3 times [2024-06-14 13:52:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495835916] [2024-06-14 13:52:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:22,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:22,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495835916] [2024-06-14 13:52:22,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495835916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:22,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:22,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:22,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406193551] [2024-06-14 13:52:22,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:22,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:22,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:22,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:22,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:22,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:22,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:22,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:22,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,862 INFO L124 PetriNetUnfolderBase]: 894/1486 cut-off events. [2024-06-14 13:52:22,862 INFO L125 PetriNetUnfolderBase]: For 6653/6659 co-relation queries the response was YES. [2024-06-14 13:52:22,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1486 events. 894/1486 cut-off events. For 6653/6659 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7329 event pairs, 323 based on Foata normal form. 8/1492 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-14 13:52:22,875 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-14 13:52:22,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 754 flow [2024-06-14 13:52:22,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:22,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:52:22,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:52:22,877 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 525 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:52:22,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 754 flow [2024-06-14 13:52:22,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 700 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:22,887 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 515 flow [2024-06-14 13:52:22,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-14 13:52:22,888 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 13:52:22,890 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 515 flow [2024-06-14 13:52:22,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:52:22,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-14 13:52:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726302608] [2024-06-14 13:52:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726302608] [2024-06-14 13:52:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726302608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:23,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365939476] [2024-06-14 13:52:23,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:23,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:23,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:23,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:23,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:23,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:23,432 INFO L124 PetriNetUnfolderBase]: 832/1382 cut-off events. [2024-06-14 13:52:23,432 INFO L125 PetriNetUnfolderBase]: For 7418/7420 co-relation queries the response was YES. [2024-06-14 13:52:23,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 1382 events. 832/1382 cut-off events. For 7418/7420 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6843 event pairs, 278 based on Foata normal form. 3/1372 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-14 13:52:23,445 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 71 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-14 13:52:23,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 745 flow [2024-06-14 13:52:23,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 13:52:23,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:23,447 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 515 flow. Second operand 4 states and 96 transitions. [2024-06-14 13:52:23,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 745 flow [2024-06-14 13:52:23,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 707 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:23,458 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 567 flow [2024-06-14 13:52:23,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-14 13:52:23,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 13:52:23,459 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 567 flow [2024-06-14 13:52:23,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:23,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:23,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:52:23,460 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:23,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-14 13:52:23,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:23,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3058363] [2024-06-14 13:52:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:23,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3058363] [2024-06-14 13:52:23,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3058363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735428083] [2024-06-14 13:52:23,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:23,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:23,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:23,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:23,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,079 INFO L124 PetriNetUnfolderBase]: 854/1424 cut-off events. [2024-06-14 13:52:24,080 INFO L125 PetriNetUnfolderBase]: For 9336/9348 co-relation queries the response was YES. [2024-06-14 13:52:24,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1424 events. 854/1424 cut-off events. For 9336/9348 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7196 event pairs, 180 based on Foata normal form. 14/1390 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-14 13:52:24,089 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-14 13:52:24,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 903 flow [2024-06-14 13:52:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:24,091 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 567 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:24,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 903 flow [2024-06-14 13:52:24,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 899 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:24,101 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 674 flow [2024-06-14 13:52:24,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-14 13:52:24,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-14 13:52:24,102 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 674 flow [2024-06-14 13:52:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:52:24,103 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1834507795, now seen corresponding path program 2 times [2024-06-14 13:52:24,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591066187] [2024-06-14 13:52:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:24,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591066187] [2024-06-14 13:52:24,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591066187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:24,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:24,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:24,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046053403] [2024-06-14 13:52:24,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:24,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:24,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:24,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:24,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:24,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:24,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,702 INFO L124 PetriNetUnfolderBase]: 871/1451 cut-off events. [2024-06-14 13:52:24,702 INFO L125 PetriNetUnfolderBase]: For 11627/11646 co-relation queries the response was YES. [2024-06-14 13:52:24,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1451 events. 871/1451 cut-off events. For 11627/11646 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7348 event pairs, 252 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-14 13:52:24,712 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-14 13:52:24,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 946 flow [2024-06-14 13:52:24,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:24,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:52:24,714 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 674 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:24,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 946 flow [2024-06-14 13:52:24,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 894 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:24,729 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 716 flow [2024-06-14 13:52:24,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-14 13:52:24,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 13:52:24,730 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 716 flow [2024-06-14 13:52:24,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:52:24,730 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 894011795, now seen corresponding path program 3 times [2024-06-14 13:52:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258337040] [2024-06-14 13:52:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258337040] [2024-06-14 13:52:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258337040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082732616] [2024-06-14 13:52:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:25,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:25,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 716 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:25,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,378 INFO L124 PetriNetUnfolderBase]: 859/1435 cut-off events. [2024-06-14 13:52:25,378 INFO L125 PetriNetUnfolderBase]: For 12686/12705 co-relation queries the response was YES. [2024-06-14 13:52:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1435 events. 859/1435 cut-off events. For 12686/12705 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7239 event pairs, 175 based on Foata normal form. 19/1405 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-14 13:52:25,388 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-14 13:52:25,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 948 flow [2024-06-14 13:52:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 13:52:25,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-14 13:52:25,389 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 716 flow. Second operand 5 states and 127 transitions. [2024-06-14 13:52:25,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 948 flow [2024-06-14 13:52:25,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 874 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:25,404 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 708 flow [2024-06-14 13:52:25,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-14 13:52:25,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 13:52:25,405 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 708 flow [2024-06-14 13:52:25,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:52:25,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:25,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,406 INFO L85 PathProgramCache]: Analyzing trace with hash 946601761, now seen corresponding path program 1 times [2024-06-14 13:52:25,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562641079] [2024-06-14 13:52:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562641079] [2024-06-14 13:52:25,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562641079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495608216] [2024-06-14 13:52:25,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:25,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:25,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 708 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:25,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,106 INFO L124 PetriNetUnfolderBase]: 1027/1715 cut-off events. [2024-06-14 13:52:26,107 INFO L125 PetriNetUnfolderBase]: For 14612/14618 co-relation queries the response was YES. [2024-06-14 13:52:26,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7480 conditions, 1715 events. 1027/1715 cut-off events. For 14612/14618 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8881 event pairs, 225 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 7437. Up to 1134 conditions per place. [2024-06-14 13:52:26,119 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-14 13:52:26,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1180 flow [2024-06-14 13:52:26,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:26,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:26,121 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 708 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:26,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1180 flow [2024-06-14 13:52:26,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1111 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:26,139 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 755 flow [2024-06-14 13:52:26,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-06-14 13:52:26,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 13:52:26,140 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 755 flow [2024-06-14 13:52:26,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:52:26,141 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:26,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1035167521, now seen corresponding path program 2 times [2024-06-14 13:52:26,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661449484] [2024-06-14 13:52:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661449484] [2024-06-14 13:52:26,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661449484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703622098] [2024-06-14 13:52:26,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:26,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:26,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:26,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 755 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:26,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,841 INFO L124 PetriNetUnfolderBase]: 1154/1928 cut-off events. [2024-06-14 13:52:26,842 INFO L125 PetriNetUnfolderBase]: For 18386/18392 co-relation queries the response was YES. [2024-06-14 13:52:26,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8654 conditions, 1928 events. 1154/1928 cut-off events. For 18386/18392 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10353 event pairs, 334 based on Foata normal form. 18/1945 useless extension candidates. Maximal degree in co-relation 8608. Up to 1458 conditions per place. [2024-06-14 13:52:26,854 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-14 13:52:26,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1204 flow [2024-06-14 13:52:26,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:26,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:26,856 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 755 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:26,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1204 flow [2024-06-14 13:52:26,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1174 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:26,878 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 813 flow [2024-06-14 13:52:26,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-14 13:52:26,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 13:52:26,879 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 813 flow [2024-06-14 13:52:26,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:52:26,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:26,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1035171241, now seen corresponding path program 3 times [2024-06-14 13:52:26,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673468073] [2024-06-14 13:52:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673468073] [2024-06-14 13:52:27,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673468073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:27,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023764746] [2024-06-14 13:52:27,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:27,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:27,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:27,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:27,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,571 INFO L124 PetriNetUnfolderBase]: 1126/1884 cut-off events. [2024-06-14 13:52:27,571 INFO L125 PetriNetUnfolderBase]: For 19358/19364 co-relation queries the response was YES. [2024-06-14 13:52:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 1884 events. 1126/1884 cut-off events. For 19358/19364 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10022 event pairs, 335 based on Foata normal form. 22/1905 useless extension candidates. Maximal degree in co-relation 8539. Up to 1537 conditions per place. [2024-06-14 13:52:27,584 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-06-14 13:52:27,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1171 flow [2024-06-14 13:52:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:27,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:52:27,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:52:27,586 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 813 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:52:27,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1171 flow [2024-06-14 13:52:27,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 1139 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:27,611 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 850 flow [2024-06-14 13:52:27,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-14 13:52:27,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:52:27,611 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 850 flow [2024-06-14 13:52:27,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:52:27,612 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1950072843, now seen corresponding path program 4 times [2024-06-14 13:52:27,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210358700] [2024-06-14 13:52:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210358700] [2024-06-14 13:52:27,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210358700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844229758] [2024-06-14 13:52:27,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:27,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:28,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:28,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:28,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,330 INFO L124 PetriNetUnfolderBase]: 1184/1983 cut-off events. [2024-06-14 13:52:28,331 INFO L125 PetriNetUnfolderBase]: For 21617/21625 co-relation queries the response was YES. [2024-06-14 13:52:28,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9140 conditions, 1983 events. 1184/1983 cut-off events. For 21617/21625 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10736 event pairs, 339 based on Foata normal form. 24/2007 useless extension candidates. Maximal degree in co-relation 9089. Up to 1653 conditions per place. [2024-06-14 13:52:28,347 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 108 selfloop transitions, 21 changer transitions 0/135 dead transitions. [2024-06-14 13:52:28,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 135 transitions, 1227 flow [2024-06-14 13:52:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:28,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:52:28,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:52:28,349 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 850 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:52:28,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 135 transitions, 1227 flow [2024-06-14 13:52:28,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 135 transitions, 1182 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:28,373 INFO L231 Difference]: Finished difference. Result has 104 places, 98 transitions, 867 flow [2024-06-14 13:52:28,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=867, PETRI_PLACES=104, PETRI_TRANSITIONS=98} [2024-06-14 13:52:28,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 13:52:28,374 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 98 transitions, 867 flow [2024-06-14 13:52:28,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:28,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:52:28,375 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:28,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1944710463, now seen corresponding path program 5 times [2024-06-14 13:52:28,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952218683] [2024-06-14 13:52:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952218683] [2024-06-14 13:52:28,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952218683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:28,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181849810] [2024-06-14 13:52:28,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:28,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:28,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:28,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 98 transitions, 867 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:28,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,082 INFO L124 PetriNetUnfolderBase]: 1217/2051 cut-off events. [2024-06-14 13:52:29,083 INFO L125 PetriNetUnfolderBase]: For 23504/23510 co-relation queries the response was YES. [2024-06-14 13:52:29,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9443 conditions, 2051 events. 1217/2051 cut-off events. For 23504/23510 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11240 event pairs, 360 based on Foata normal form. 22/2072 useless extension candidates. Maximal degree in co-relation 9391. Up to 1712 conditions per place. [2024-06-14 13:52:29,140 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 19 changer transitions 0/128 dead transitions. [2024-06-14 13:52:29,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 128 transitions, 1212 flow [2024-06-14 13:52:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:29,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:52:29,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:52:29,143 INFO L175 Difference]: Start difference. First operand has 104 places, 98 transitions, 867 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:52:29,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 128 transitions, 1212 flow [2024-06-14 13:52:29,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1169 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:29,171 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 884 flow [2024-06-14 13:52:29,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=884, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-14 13:52:29,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 13:52:29,171 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 884 flow [2024-06-14 13:52:29,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:52:29,172 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1944562593, now seen corresponding path program 6 times [2024-06-14 13:52:29,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212292785] [2024-06-14 13:52:29,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212292785] [2024-06-14 13:52:29,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212292785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919962365] [2024-06-14 13:52:29,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:29,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:29,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 884 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:29,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,901 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-14 13:52:29,902 INFO L125 PetriNetUnfolderBase]: For 23089/23095 co-relation queries the response was YES. [2024-06-14 13:52:29,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9230 conditions, 2019 events. 1197/2019 cut-off events. For 23089/23095 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11034 event pairs, 251 based on Foata normal form. 18/2036 useless extension candidates. Maximal degree in co-relation 9177. Up to 1471 conditions per place. [2024-06-14 13:52:29,914 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 104 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-14 13:52:29,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 133 transitions, 1256 flow [2024-06-14 13:52:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:29,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:29,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:52:29,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 13:52:29,915 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 884 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:52:29,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 133 transitions, 1256 flow [2024-06-14 13:52:29,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 133 transitions, 1211 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:29,943 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 924 flow [2024-06-14 13:52:29,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=924, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2024-06-14 13:52:29,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 13:52:29,943 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 924 flow [2024-06-14 13:52:29,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:29,944 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1950288045, now seen corresponding path program 1 times [2024-06-14 13:52:29,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508793878] [2024-06-14 13:52:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508793878] [2024-06-14 13:52:30,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508793878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161972364] [2024-06-14 13:52:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:30,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:30,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:30,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 924 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:30,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,676 INFO L124 PetriNetUnfolderBase]: 1177/1988 cut-off events. [2024-06-14 13:52:30,677 INFO L125 PetriNetUnfolderBase]: For 23054/23062 co-relation queries the response was YES. [2024-06-14 13:52:30,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9074 conditions, 1988 events. 1177/1988 cut-off events. For 23054/23062 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10803 event pairs, 285 based on Foata normal form. 20/2008 useless extension candidates. Maximal degree in co-relation 9019. Up to 1441 conditions per place. [2024-06-14 13:52:30,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-14 13:52:30,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 141 transitions, 1278 flow [2024-06-14 13:52:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:52:30,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:52:30,692 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 924 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:52:30,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 141 transitions, 1278 flow [2024-06-14 13:52:30,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1202 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:30,716 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 862 flow [2024-06-14 13:52:30,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=101, 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=8, PETRI_FLOW=862, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-14 13:52:30,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 13:52:30,717 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 862 flow [2024-06-14 13:52:30,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:30,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1240255241, now seen corresponding path program 1 times [2024-06-14 13:52:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370226064] [2024-06-14 13:52:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370226064] [2024-06-14 13:52:31,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370226064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:31,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004202292] [2024-06-14 13:52:31,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:31,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:31,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 862 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:31,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,350 INFO L124 PetriNetUnfolderBase]: 1127/1918 cut-off events. [2024-06-14 13:52:31,350 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-14 13:52:31,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 1918 events. 1127/1918 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10559 event pairs, 308 based on Foata normal form. 5/1908 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-14 13:52:31,363 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-14 13:52:31,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 1102 flow [2024-06-14 13:52:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 13:52:31,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:52:31,364 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 862 flow. Second operand 4 states and 97 transitions. [2024-06-14 13:52:31,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 1102 flow [2024-06-14 13:52:31,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1032 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:31,391 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 870 flow [2024-06-14 13:52:31,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-14 13:52:31,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 13:52:31,391 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 870 flow [2024-06-14 13:52:31,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:31,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:31,392 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:31,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-14 13:52:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:31,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449321750] [2024-06-14 13:52:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449321750] [2024-06-14 13:52:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449321750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752052624] [2024-06-14 13:52:31,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:31,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:31,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 870 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:31,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,109 INFO L124 PetriNetUnfolderBase]: 1121/1907 cut-off events. [2024-06-14 13:52:32,110 INFO L125 PetriNetUnfolderBase]: For 23401/23406 co-relation queries the response was YES. [2024-06-14 13:52:32,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8692 conditions, 1907 events. 1121/1907 cut-off events. For 23401/23406 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10512 event pairs, 296 based on Foata normal form. 5/1899 useless extension candidates. Maximal degree in co-relation 8637. Up to 1690 conditions per place. [2024-06-14 13:52:32,124 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 89 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-14 13:52:32,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 124 transitions, 1169 flow [2024-06-14 13:52:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:32,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:52:32,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:52:32,129 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 870 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:52:32,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 124 transitions, 1169 flow [2024-06-14 13:52:32,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 124 transitions, 1119 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:32,165 INFO L231 Difference]: Finished difference. Result has 111 places, 106 transitions, 906 flow [2024-06-14 13:52:32,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=906, PETRI_PLACES=111, PETRI_TRANSITIONS=106} [2024-06-14 13:52:32,166 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 13:52:32,166 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 106 transitions, 906 flow [2024-06-14 13:52:32,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:32,167 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,170 INFO L85 PathProgramCache]: Analyzing trace with hash -100791535, now seen corresponding path program 1 times [2024-06-14 13:52:32,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250224030] [2024-06-14 13:52:32,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250224030] [2024-06-14 13:52:32,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250224030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:32,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137562574] [2024-06-14 13:52:32,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:32,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:32,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:32,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:32,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 106 transitions, 906 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:32,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,800 INFO L124 PetriNetUnfolderBase]: 1109/1924 cut-off events. [2024-06-14 13:52:32,801 INFO L125 PetriNetUnfolderBase]: For 23977/23979 co-relation queries the response was YES. [2024-06-14 13:52:32,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8835 conditions, 1924 events. 1109/1924 cut-off events. For 23977/23979 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10766 event pairs, 306 based on Foata normal form. 4/1927 useless extension candidates. Maximal degree in co-relation 8779. Up to 1700 conditions per place. [2024-06-14 13:52:32,813 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 94 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-14 13:52:32,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 125 transitions, 1274 flow [2024-06-14 13:52:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:32,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 13:52:32,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-14 13:52:32,814 INFO L175 Difference]: Start difference. First operand has 111 places, 106 transitions, 906 flow. Second operand 5 states and 119 transitions. [2024-06-14 13:52:32,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 125 transitions, 1274 flow [2024-06-14 13:52:32,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 125 transitions, 1182 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:32,847 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 930 flow [2024-06-14 13:52:32,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=930, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-14 13:52:32,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 13:52:32,847 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 930 flow [2024-06-14 13:52:32,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:32,848 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash -57282415, now seen corresponding path program 2 times [2024-06-14 13:52:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384776188] [2024-06-14 13:52:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384776188] [2024-06-14 13:52:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384776188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044581913] [2024-06-14 13:52:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:33,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:33,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:33,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 930 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:33,478 INFO L124 PetriNetUnfolderBase]: 1104/1917 cut-off events. [2024-06-14 13:52:33,479 INFO L125 PetriNetUnfolderBase]: For 25770/25772 co-relation queries the response was YES. [2024-06-14 13:52:33,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8990 conditions, 1917 events. 1104/1917 cut-off events. For 25770/25772 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10754 event pairs, 306 based on Foata normal form. 4/1920 useless extension candidates. Maximal degree in co-relation 8936. Up to 1701 conditions per place. [2024-06-14 13:52:33,508 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-14 13:52:33,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 123 transitions, 1186 flow [2024-06-14 13:52:33,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 13:52:33,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:33,510 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 930 flow. Second operand 4 states and 100 transitions. [2024-06-14 13:52:33,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 123 transitions, 1186 flow [2024-06-14 13:52:33,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 123 transitions, 1131 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:33,548 INFO L231 Difference]: Finished difference. Result has 112 places, 112 transitions, 925 flow [2024-06-14 13:52:33,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=925, PETRI_PLACES=112, PETRI_TRANSITIONS=112} [2024-06-14 13:52:33,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 13:52:33,549 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 112 transitions, 925 flow [2024-06-14 13:52:33,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:33,550 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-14 13:52:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226813792] [2024-06-14 13:52:33,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226813792] [2024-06-14 13:52:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226813792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:33,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584827648] [2024-06-14 13:52:33,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:33,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:33,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:33,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:33,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 112 transitions, 925 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,162 INFO L124 PetriNetUnfolderBase]: 1111/1912 cut-off events. [2024-06-14 13:52:34,162 INFO L125 PetriNetUnfolderBase]: For 27231/27236 co-relation queries the response was YES. [2024-06-14 13:52:34,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8948 conditions, 1912 events. 1111/1912 cut-off events. For 27231/27236 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10594 event pairs, 292 based on Foata normal form. 7/1906 useless extension candidates. Maximal degree in co-relation 8892. Up to 1704 conditions per place. [2024-06-14 13:52:34,172 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 102 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2024-06-14 13:52:34,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 125 transitions, 1196 flow [2024-06-14 13:52:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 13:52:34,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:52:34,173 INFO L175 Difference]: Start difference. First operand has 112 places, 112 transitions, 925 flow. Second operand 5 states and 113 transitions. [2024-06-14 13:52:34,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 125 transitions, 1196 flow [2024-06-14 13:52:34,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 125 transitions, 1158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:34,204 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 934 flow [2024-06-14 13:52:34,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=934, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2024-06-14 13:52:34,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 13:52:34,205 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 934 flow [2024-06-14 13:52:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:34,205 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1195761377, now seen corresponding path program 1 times [2024-06-14 13:52:34,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276875680] [2024-06-14 13:52:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:34,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276875680] [2024-06-14 13:52:34,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276875680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184126930] [2024-06-14 13:52:34,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:34,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:34,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 934 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 13:52:34,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:34,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,905 INFO L124 PetriNetUnfolderBase]: 1193/2032 cut-off events. [2024-06-14 13:52:34,905 INFO L125 PetriNetUnfolderBase]: For 28770/28776 co-relation queries the response was YES. [2024-06-14 13:52:34,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9603 conditions, 2032 events. 1193/2032 cut-off events. For 28770/28776 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11235 event pairs, 308 based on Foata normal form. 7/2039 useless extension candidates. Maximal degree in co-relation 9546. Up to 1807 conditions per place. [2024-06-14 13:52:34,915 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2024-06-14 13:52:34,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 150 transitions, 1441 flow [2024-06-14 13:52:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:52:34,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 13:52:34,917 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 934 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:52:34,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 150 transitions, 1441 flow [2024-06-14 13:52:34,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 150 transitions, 1405 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:34,948 INFO L231 Difference]: Finished difference. Result has 121 places, 129 transitions, 1100 flow [2024-06-14 13:52:34,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1100, PETRI_PLACES=121, PETRI_TRANSITIONS=129} [2024-06-14 13:52:34,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 13:52:34,949 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 129 transitions, 1100 flow [2024-06-14 13:52:34,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 13:52:34,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:34,950 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:34,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,950 INFO L85 PathProgramCache]: Analyzing trace with hash -163904445, now seen corresponding path program 2 times [2024-06-14 13:52:34,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379436981] [2024-06-14 13:52:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379436981] [2024-06-14 13:52:35,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379436981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287012559] [2024-06-14 13:52:35,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:35,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:35,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:35,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 1100 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:35,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:35,621 INFO L124 PetriNetUnfolderBase]: 1198/2041 cut-off events. [2024-06-14 13:52:35,621 INFO L125 PetriNetUnfolderBase]: For 31530/31538 co-relation queries the response was YES. [2024-06-14 13:52:35,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9976 conditions, 2041 events. 1198/2041 cut-off events. For 31530/31538 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11296 event pairs, 308 based on Foata normal form. 9/2050 useless extension candidates. Maximal degree in co-relation 9916. Up to 1813 conditions per place. [2024-06-14 13:52:35,634 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 118 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2024-06-14 13:52:35,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 152 transitions, 1524 flow [2024-06-14 13:52:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:35,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:35,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:52:35,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 13:52:35,636 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 1100 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:52:35,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 152 transitions, 1524 flow [2024-06-14 13:52:35,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 152 transitions, 1460 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:35,677 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1128 flow [2024-06-14 13:52:35,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-14 13:52:35,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 13:52:35,682 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1128 flow [2024-06-14 13:52:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:35,683 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:35,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash -163893285, now seen corresponding path program 3 times [2024-06-14 13:52:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651578036] [2024-06-14 13:52:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651578036] [2024-06-14 13:52:36,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651578036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968278913] [2024-06-14 13:52:36,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:36,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1128 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:36,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,399 INFO L124 PetriNetUnfolderBase]: 1195/2034 cut-off events. [2024-06-14 13:52:36,400 INFO L125 PetriNetUnfolderBase]: For 33326/33326 co-relation queries the response was YES. [2024-06-14 13:52:36,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9975 conditions, 2034 events. 1195/2034 cut-off events. For 33326/33326 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11197 event pairs, 317 based on Foata normal form. 1/2034 useless extension candidates. Maximal degree in co-relation 9914. Up to 1810 conditions per place. [2024-06-14 13:52:36,414 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-14 13:52:36,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 143 transitions, 1434 flow [2024-06-14 13:52:36,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 13:52:36,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:52:36,415 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1128 flow. Second operand 5 states and 113 transitions. [2024-06-14 13:52:36,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 143 transitions, 1434 flow [2024-06-14 13:52:36,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 143 transitions, 1368 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:36,459 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1120 flow [2024-06-14 13:52:36,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-14 13:52:36,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 13:52:36,460 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1120 flow [2024-06-14 13:52:36,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:36,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:36,460 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:36,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash -863822117, now seen corresponding path program 4 times [2024-06-14 13:52:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:36,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175851318] [2024-06-14 13:52:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:36,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175851318] [2024-06-14 13:52:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175851318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741261940] [2024-06-14 13:52:36,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:36,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:36,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 13:52:36,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:36,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,198 INFO L124 PetriNetUnfolderBase]: 1192/2018 cut-off events. [2024-06-14 13:52:37,198 INFO L125 PetriNetUnfolderBase]: For 32509/32509 co-relation queries the response was YES. [2024-06-14 13:52:37,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9899 conditions, 2018 events. 1192/2018 cut-off events. For 32509/32509 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11060 event pairs, 298 based on Foata normal form. 1/2019 useless extension candidates. Maximal degree in co-relation 9838. Up to 1800 conditions per place. [2024-06-14 13:52:37,218 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 121 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2024-06-14 13:52:37,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 161 transitions, 1541 flow [2024-06-14 13:52:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:37,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:37,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 13:52:37,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152439024390244 [2024-06-14 13:52:37,220 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1120 flow. Second operand 8 states and 169 transitions. [2024-06-14 13:52:37,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 161 transitions, 1541 flow [2024-06-14 13:52:37,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 161 transitions, 1485 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:37,284 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1215 flow [2024-06-14 13:52:37,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1068, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-06-14 13:52:37,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 13:52:37,285 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1215 flow [2024-06-14 13:52:37,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 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) [2024-06-14 13:52:37,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:37,285 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,286 INFO L85 PathProgramCache]: Analyzing trace with hash 653254931, now seen corresponding path program 1 times [2024-06-14 13:52:37,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003870987] [2024-06-14 13:52:37,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003870987] [2024-06-14 13:52:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003870987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925687616] [2024-06-14 13:52:37,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:37,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1215 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:37,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,928 INFO L124 PetriNetUnfolderBase]: 1197/2028 cut-off events. [2024-06-14 13:52:37,928 INFO L125 PetriNetUnfolderBase]: For 34732/34734 co-relation queries the response was YES. [2024-06-14 13:52:37,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10263 conditions, 2028 events. 1197/2028 cut-off events. For 34732/34734 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11131 event pairs, 306 based on Foata normal form. 3/2031 useless extension candidates. Maximal degree in co-relation 10199. Up to 1823 conditions per place. [2024-06-14 13:52:37,942 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 22 changer transitions 0/169 dead transitions. [2024-06-14 13:52:37,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 169 transitions, 1733 flow [2024-06-14 13:52:37,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 13:52:37,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:52:37,943 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1215 flow. Second operand 6 states and 134 transitions. [2024-06-14 13:52:37,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 169 transitions, 1733 flow [2024-06-14 13:52:37,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 169 transitions, 1711 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:37,994 INFO L231 Difference]: Finished difference. Result has 139 places, 153 transitions, 1364 flow [2024-06-14 13:52:37,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=139, PETRI_TRANSITIONS=153} [2024-06-14 13:52:37,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-14 13:52:37,994 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 153 transitions, 1364 flow [2024-06-14 13:52:37,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:37,995 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1775753625, now seen corresponding path program 2 times [2024-06-14 13:52:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887119105] [2024-06-14 13:52:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887119105] [2024-06-14 13:52:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887119105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947032081] [2024-06-14 13:52:38,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:38,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 153 transitions, 1364 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:38,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:38,757 INFO L124 PetriNetUnfolderBase]: 1202/2037 cut-off events. [2024-06-14 13:52:38,757 INFO L125 PetriNetUnfolderBase]: For 37824/37828 co-relation queries the response was YES. [2024-06-14 13:52:38,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10700 conditions, 2037 events. 1202/2037 cut-off events. For 37824/37828 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11197 event pairs, 306 based on Foata normal form. 5/2042 useless extension candidates. Maximal degree in co-relation 10631. Up to 1835 conditions per place. [2024-06-14 13:52:38,769 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 20 changer transitions 0/171 dead transitions. [2024-06-14 13:52:38,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 171 transitions, 1827 flow [2024-06-14 13:52:38,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 13:52:38,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-14 13:52:38,771 INFO L175 Difference]: Start difference. First operand has 139 places, 153 transitions, 1364 flow. Second operand 5 states and 117 transitions. [2024-06-14 13:52:38,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 171 transitions, 1827 flow [2024-06-14 13:52:38,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 171 transitions, 1775 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:38,829 INFO L231 Difference]: Finished difference. Result has 143 places, 157 transitions, 1408 flow [2024-06-14 13:52:38,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1408, PETRI_PLACES=143, PETRI_TRANSITIONS=157} [2024-06-14 13:52:38,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 13:52:38,830 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 157 transitions, 1408 flow [2024-06-14 13:52:38,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:38,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:38,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:38,831 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:38,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:38,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1775748045, now seen corresponding path program 3 times [2024-06-14 13:52:38,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:38,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512392103] [2024-06-14 13:52:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:38,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512392103] [2024-06-14 13:52:39,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512392103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456579420] [2024-06-14 13:52:39,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:39,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:39,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:39,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 1408 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:39,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,503 INFO L124 PetriNetUnfolderBase]: 1199/2033 cut-off events. [2024-06-14 13:52:39,504 INFO L125 PetriNetUnfolderBase]: For 39684/39688 co-relation queries the response was YES. [2024-06-14 13:52:39,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10713 conditions, 2033 events. 1199/2033 cut-off events. For 39684/39688 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11164 event pairs, 304 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 10642. Up to 1832 conditions per place. [2024-06-14 13:52:39,520 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-06-14 13:52:39,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 173 transitions, 1791 flow [2024-06-14 13:52:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:39,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:39,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 13:52:39,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 13:52:39,522 INFO L175 Difference]: Start difference. First operand has 143 places, 157 transitions, 1408 flow. Second operand 7 states and 149 transitions. [2024-06-14 13:52:39,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 173 transitions, 1791 flow [2024-06-14 13:52:39,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 173 transitions, 1727 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:39,591 INFO L231 Difference]: Finished difference. Result has 147 places, 158 transitions, 1406 flow [2024-06-14 13:52:39,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=147, PETRI_TRANSITIONS=158} [2024-06-14 13:52:39,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 13:52:39,591 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 158 transitions, 1406 flow [2024-06-14 13:52:39,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:39,592 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:39,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1408165366, now seen corresponding path program 1 times [2024-06-14 13:52:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907133163] [2024-06-14 13:52:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907133163] [2024-06-14 13:52:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907133163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:40,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416686776] [2024-06-14 13:52:40,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:40,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:40,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:40,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:40,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 158 transitions, 1406 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:40,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:40,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,348 INFO L124 PetriNetUnfolderBase]: 1186/2014 cut-off events. [2024-06-14 13:52:40,349 INFO L125 PetriNetUnfolderBase]: For 43872/43877 co-relation queries the response was YES. [2024-06-14 13:52:40,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10724 conditions, 2014 events. 1186/2014 cut-off events. For 43872/43877 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11185 event pairs, 308 based on Foata normal form. 9/2007 useless extension candidates. Maximal degree in co-relation 10652. Up to 1725 conditions per place. [2024-06-14 13:52:40,363 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 122 selfloop transitions, 27 changer transitions 0/170 dead transitions. [2024-06-14 13:52:40,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 170 transitions, 1756 flow [2024-06-14 13:52:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 13:52:40,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 13:52:40,365 INFO L175 Difference]: Start difference. First operand has 147 places, 158 transitions, 1406 flow. Second operand 5 states and 116 transitions. [2024-06-14 13:52:40,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 170 transitions, 1756 flow [2024-06-14 13:52:40,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 170 transitions, 1704 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:40,436 INFO L231 Difference]: Finished difference. Result has 147 places, 160 transitions, 1450 flow [2024-06-14 13:52:40,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1354, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1450, PETRI_PLACES=147, PETRI_TRANSITIONS=160} [2024-06-14 13:52:40,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 13:52:40,439 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 160 transitions, 1450 flow [2024-06-14 13:52:40,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:40,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:40,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:40,439 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:40,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-14 13:52:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815844190] [2024-06-14 13:52:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815844190] [2024-06-14 13:52:40,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815844190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973351725] [2024-06-14 13:52:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:40,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:40,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 160 transitions, 1450 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:40,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:40,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:41,239 INFO L124 PetriNetUnfolderBase]: 1184/2017 cut-off events. [2024-06-14 13:52:41,240 INFO L125 PetriNetUnfolderBase]: For 46551/46551 co-relation queries the response was YES. [2024-06-14 13:52:41,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 2017 events. 1184/2017 cut-off events. For 46551/46551 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11215 event pairs, 296 based on Foata normal form. 4/2007 useless extension candidates. Maximal degree in co-relation 10860. Up to 1739 conditions per place. [2024-06-14 13:52:41,255 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 129 selfloop transitions, 32 changer transitions 0/182 dead transitions. [2024-06-14 13:52:41,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 182 transitions, 1855 flow [2024-06-14 13:52:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:41,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:52:41,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:52:41,261 INFO L175 Difference]: Start difference. First operand has 147 places, 160 transitions, 1450 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:52:41,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 182 transitions, 1855 flow [2024-06-14 13:52:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 182 transitions, 1787 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:41,339 INFO L231 Difference]: Finished difference. Result has 152 places, 162 transitions, 1488 flow [2024-06-14 13:52:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1382, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1488, PETRI_PLACES=152, PETRI_TRANSITIONS=162} [2024-06-14 13:52:41,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:52:41,340 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 162 transitions, 1488 flow [2024-06-14 13:52:41,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:41,340 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:41,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,341 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-14 13:52:41,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96334168] [2024-06-14 13:52:41,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96334168] [2024-06-14 13:52:41,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96334168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:41,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624481752] [2024-06-14 13:52:41,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:41,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:41,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:41,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 162 transitions, 1488 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:41,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:41,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,104 INFO L124 PetriNetUnfolderBase]: 1174/2003 cut-off events. [2024-06-14 13:52:42,105 INFO L125 PetriNetUnfolderBase]: For 47065/47065 co-relation queries the response was YES. [2024-06-14 13:52:42,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10845 conditions, 2003 events. 1174/2003 cut-off events. For 47065/47065 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11143 event pairs, 290 based on Foata normal form. 4/1993 useless extension candidates. Maximal degree in co-relation 10771. Up to 1687 conditions per place. [2024-06-14 13:52:42,121 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 126 selfloop transitions, 38 changer transitions 0/185 dead transitions. [2024-06-14 13:52:42,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 185 transitions, 1905 flow [2024-06-14 13:52:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:52:42,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:52:42,122 INFO L175 Difference]: Start difference. First operand has 152 places, 162 transitions, 1488 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:52:42,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 185 transitions, 1905 flow [2024-06-14 13:52:42,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 185 transitions, 1817 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:42,199 INFO L231 Difference]: Finished difference. Result has 154 places, 164 transitions, 1521 flow [2024-06-14 13:52:42,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1400, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=154, PETRI_TRANSITIONS=164} [2024-06-14 13:52:42,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:52:42,200 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 164 transitions, 1521 flow [2024-06-14 13:52:42,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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) [2024-06-14 13:52:42,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:42,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:42,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:42,200 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:42,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1479793488, now seen corresponding path program 1 times [2024-06-14 13:52:42,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:42,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484793752] [2024-06-14 13:52:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:42,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:42,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484793752] [2024-06-14 13:52:42,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484793752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:42,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:42,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:42,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102276067] [2024-06-14 13:52:42,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:42,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:42,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:42,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:42,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:42,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:42,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 164 transitions, 1521 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:42,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:42,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,931 INFO L124 PetriNetUnfolderBase]: 1186/2028 cut-off events. [2024-06-14 13:52:42,931 INFO L125 PetriNetUnfolderBase]: For 50375/50379 co-relation queries the response was YES. [2024-06-14 13:52:42,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11076 conditions, 2028 events. 1186/2028 cut-off events. For 50375/50379 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11320 event pairs, 268 based on Foata normal form. 8/2029 useless extension candidates. Maximal degree in co-relation 11001. Up to 1686 conditions per place. [2024-06-14 13:52:42,948 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 138 selfloop transitions, 32 changer transitions 0/187 dead transitions. [2024-06-14 13:52:42,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 187 transitions, 2043 flow [2024-06-14 13:52:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:42,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:52:42,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:52:42,964 INFO L175 Difference]: Start difference. First operand has 154 places, 164 transitions, 1521 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:52:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 187 transitions, 2043 flow [2024-06-14 13:52:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 187 transitions, 1938 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:43,070 INFO L231 Difference]: Finished difference. Result has 154 places, 168 transitions, 1557 flow [2024-06-14 13:52:43,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1557, PETRI_PLACES=154, PETRI_TRANSITIONS=168} [2024-06-14 13:52:43,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:52:43,071 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 168 transitions, 1557 flow [2024-06-14 13:52:43,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:43,072 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:43,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1920820914, now seen corresponding path program 2 times [2024-06-14 13:52:43,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524958633] [2024-06-14 13:52:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:43,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:43,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524958633] [2024-06-14 13:52:43,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524958633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:43,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:43,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:43,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737231161] [2024-06-14 13:52:43,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:43,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:43,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:43,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:43,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:43,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 168 transitions, 1557 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:43,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:43,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,035 INFO L124 PetriNetUnfolderBase]: 1200/2050 cut-off events. [2024-06-14 13:52:44,035 INFO L125 PetriNetUnfolderBase]: For 53259/53263 co-relation queries the response was YES. [2024-06-14 13:52:44,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11274 conditions, 2050 events. 1200/2050 cut-off events. For 53259/53263 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11505 event pairs, 305 based on Foata normal form. 8/2051 useless extension candidates. Maximal degree in co-relation 11198. Up to 1768 conditions per place. [2024-06-14 13:52:44,052 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 137 selfloop transitions, 30 changer transitions 0/184 dead transitions. [2024-06-14 13:52:44,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 184 transitions, 1963 flow [2024-06-14 13:52:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:52:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:52:44,056 INFO L175 Difference]: Start difference. First operand has 154 places, 168 transitions, 1557 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:52:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 184 transitions, 1963 flow [2024-06-14 13:52:44,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 184 transitions, 1887 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:44,158 INFO L231 Difference]: Finished difference. Result has 158 places, 170 transitions, 1589 flow [2024-06-14 13:52:44,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1589, PETRI_PLACES=158, PETRI_TRANSITIONS=170} [2024-06-14 13:52:44,159 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:52:44,159 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 170 transitions, 1589 flow [2024-06-14 13:52:44,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:44,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:44,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:44,160 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:44,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:44,161 INFO L85 PathProgramCache]: Analyzing trace with hash 786208784, now seen corresponding path program 3 times [2024-06-14 13:52:44,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:44,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985762962] [2024-06-14 13:52:44,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:44,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985762962] [2024-06-14 13:52:44,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985762962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:44,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153545763] [2024-06-14 13:52:44,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:44,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:44,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:44,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 170 transitions, 1589 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:44,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,959 INFO L124 PetriNetUnfolderBase]: 1190/2036 cut-off events. [2024-06-14 13:52:44,960 INFO L125 PetriNetUnfolderBase]: For 53376/53380 co-relation queries the response was YES. [2024-06-14 13:52:44,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11088 conditions, 2036 events. 1190/2036 cut-off events. For 53376/53380 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11417 event pairs, 266 based on Foata normal form. 8/2037 useless extension candidates. Maximal degree in co-relation 11010. Up to 1726 conditions per place. [2024-06-14 13:52:44,975 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 142 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2024-06-14 13:52:44,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 186 transitions, 1967 flow [2024-06-14 13:52:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:52:44,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 13:52:44,976 INFO L175 Difference]: Start difference. First operand has 158 places, 170 transitions, 1589 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:52:44,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 186 transitions, 1967 flow [2024-06-14 13:52:45,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 186 transitions, 1869 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:45,060 INFO L231 Difference]: Finished difference. Result has 159 places, 170 transitions, 1555 flow [2024-06-14 13:52:45,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1555, PETRI_PLACES=159, PETRI_TRANSITIONS=170} [2024-06-14 13:52:45,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-14 13:52:45,061 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 170 transitions, 1555 flow [2024-06-14 13:52:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:45,061 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] [2024-06-14 13:52:45,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:45,062 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:45,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2104420354, now seen corresponding path program 1 times [2024-06-14 13:52:45,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:45,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951157211] [2024-06-14 13:52:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:45,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:45,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951157211] [2024-06-14 13:52:45,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951157211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:45,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:45,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:52:45,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601647334] [2024-06-14 13:52:45,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:45,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:52:45,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:45,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:52:45,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:52:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:45,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 170 transitions, 1555 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:45,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,875 INFO L124 PetriNetUnfolderBase]: 1317/2220 cut-off events. [2024-06-14 13:52:45,876 INFO L125 PetriNetUnfolderBase]: For 62711/62719 co-relation queries the response was YES. [2024-06-14 13:52:45,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12149 conditions, 2220 events. 1317/2220 cut-off events. For 62711/62719 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12401 event pairs, 246 based on Foata normal form. 14/2234 useless extension candidates. Maximal degree in co-relation 12070. Up to 1866 conditions per place. [2024-06-14 13:52:45,893 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2024-06-14 13:52:45,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 207 transitions, 2182 flow [2024-06-14 13:52:45,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:45,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:45,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:52:45,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 13:52:45,895 INFO L175 Difference]: Start difference. First operand has 159 places, 170 transitions, 1555 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:52:45,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 207 transitions, 2182 flow [2024-06-14 13:52:45,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 207 transitions, 2120 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:45,999 INFO L231 Difference]: Finished difference. Result has 166 places, 175 transitions, 1637 flow [2024-06-14 13:52:45,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1637, PETRI_PLACES=166, PETRI_TRANSITIONS=175} [2024-06-14 13:52:46,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 13:52:46,000 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 175 transitions, 1637 flow [2024-06-14 13:52:46,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:46,000 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] [2024-06-14 13:52:46,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:46,001 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:46,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:46,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1277062914, now seen corresponding path program 2 times [2024-06-14 13:52:46,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:46,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343237215] [2024-06-14 13:52:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:46,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:46,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:46,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343237215] [2024-06-14 13:52:46,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343237215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:46,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:46,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407192824] [2024-06-14 13:52:46,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:46,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:46,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:46,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:46,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 175 transitions, 1637 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:46,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:46,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:46,874 INFO L124 PetriNetUnfolderBase]: 1345/2268 cut-off events. [2024-06-14 13:52:46,874 INFO L125 PetriNetUnfolderBase]: For 67831/67839 co-relation queries the response was YES. [2024-06-14 13:52:46,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12583 conditions, 2268 events. 1345/2268 cut-off events. For 67831/67839 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12763 event pairs, 327 based on Foata normal form. 16/2284 useless extension candidates. Maximal degree in co-relation 12501. Up to 2010 conditions per place. [2024-06-14 13:52:46,889 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 32 changer transitions 0/200 dead transitions. [2024-06-14 13:52:46,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 200 transitions, 2115 flow [2024-06-14 13:52:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 13:52:46,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-14 13:52:46,891 INFO L175 Difference]: Start difference. First operand has 166 places, 175 transitions, 1637 flow. Second operand 9 states and 188 transitions. [2024-06-14 13:52:46,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 200 transitions, 2115 flow [2024-06-14 13:52:47,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 200 transitions, 2068 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:47,010 INFO L231 Difference]: Finished difference. Result has 171 places, 176 transitions, 1672 flow [2024-06-14 13:52:47,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1672, PETRI_PLACES=171, PETRI_TRANSITIONS=176} [2024-06-14 13:52:47,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 13:52:47,011 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 176 transitions, 1672 flow [2024-06-14 13:52:47,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,011 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] [2024-06-14 13:52:47,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:47,012 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:47,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1018448514, now seen corresponding path program 3 times [2024-06-14 13:52:47,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918301270] [2024-06-14 13:52:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918301270] [2024-06-14 13:52:47,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918301270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044125878] [2024-06-14 13:52:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:47,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:47,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 176 transitions, 1672 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:47,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:47,765 INFO L124 PetriNetUnfolderBase]: 1373/2312 cut-off events. [2024-06-14 13:52:47,765 INFO L125 PetriNetUnfolderBase]: For 69808/69816 co-relation queries the response was YES. [2024-06-14 13:52:47,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12924 conditions, 2312 events. 1373/2312 cut-off events. For 69808/69816 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13019 event pairs, 325 based on Foata normal form. 14/2326 useless extension candidates. Maximal degree in co-relation 12840. Up to 2024 conditions per place. [2024-06-14 13:52:47,783 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 35 changer transitions 0/207 dead transitions. [2024-06-14 13:52:47,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 207 transitions, 2204 flow [2024-06-14 13:52:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 13:52:47,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-14 13:52:47,785 INFO L175 Difference]: Start difference. First operand has 171 places, 176 transitions, 1672 flow. Second operand 10 states and 207 transitions. [2024-06-14 13:52:47,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 207 transitions, 2204 flow [2024-06-14 13:52:47,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 207 transitions, 2141 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:47,925 INFO L231 Difference]: Finished difference. Result has 175 places, 179 transitions, 1728 flow [2024-06-14 13:52:47,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1728, PETRI_PLACES=175, PETRI_TRANSITIONS=179} [2024-06-14 13:52:47,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 13:52:47,926 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 179 transitions, 1728 flow [2024-06-14 13:52:47,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,926 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] [2024-06-14 13:52:47,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:47,927 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:47,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1099577064, now seen corresponding path program 1 times [2024-06-14 13:52:47,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795652465] [2024-06-14 13:52:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:48,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:48,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795652465] [2024-06-14 13:52:48,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795652465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:48,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:48,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:48,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618308066] [2024-06-14 13:52:48,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:48,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:48,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:48,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:48,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:48,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 179 transitions, 1728 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:48,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:48,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,628 INFO L124 PetriNetUnfolderBase]: 1386/2341 cut-off events. [2024-06-14 13:52:48,628 INFO L125 PetriNetUnfolderBase]: For 70709/70717 co-relation queries the response was YES. [2024-06-14 13:52:48,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13247 conditions, 2341 events. 1386/2341 cut-off events. For 70709/70717 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13292 event pairs, 356 based on Foata normal form. 9/2349 useless extension candidates. Maximal degree in co-relation 13161. Up to 1969 conditions per place. [2024-06-14 13:52:48,647 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 54 changer transitions 0/213 dead transitions. [2024-06-14 13:52:48,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 213 transitions, 2478 flow [2024-06-14 13:52:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:48,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:52:48,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:52:48,649 INFO L175 Difference]: Start difference. First operand has 175 places, 179 transitions, 1728 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:52:48,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 213 transitions, 2478 flow [2024-06-14 13:52:48,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 213 transitions, 2408 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:48,801 INFO L231 Difference]: Finished difference. Result has 175 places, 188 transitions, 1892 flow [2024-06-14 13:52:48,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=175, PETRI_TRANSITIONS=188} [2024-06-14 13:52:48,801 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 13:52:48,801 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 188 transitions, 1892 flow [2024-06-14 13:52:48,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:48,802 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] [2024-06-14 13:52:48,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:48,802 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:48,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697034, now seen corresponding path program 2 times [2024-06-14 13:52:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:48,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436491846] [2024-06-14 13:52:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436491846] [2024-06-14 13:52:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436491846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021597766] [2024-06-14 13:52:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:49,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:49,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 188 transitions, 1892 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:49,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:49,549 INFO L124 PetriNetUnfolderBase]: 1396/2358 cut-off events. [2024-06-14 13:52:49,549 INFO L125 PetriNetUnfolderBase]: For 75059/75071 co-relation queries the response was YES. [2024-06-14 13:52:49,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13683 conditions, 2358 events. 1396/2358 cut-off events. For 75059/75071 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13418 event pairs, 344 based on Foata normal form. 13/2371 useless extension candidates. Maximal degree in co-relation 13596. Up to 2064 conditions per place. [2024-06-14 13:52:49,570 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 38 changer transitions 0/214 dead transitions. [2024-06-14 13:52:49,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 214 transitions, 2431 flow [2024-06-14 13:52:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:49,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:49,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:52:49,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:52:49,571 INFO L175 Difference]: Start difference. First operand has 175 places, 188 transitions, 1892 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:52:49,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 214 transitions, 2431 flow [2024-06-14 13:52:49,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 214 transitions, 2326 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:49,713 INFO L231 Difference]: Finished difference. Result has 180 places, 194 transitions, 1948 flow [2024-06-14 13:52:49,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1948, PETRI_PLACES=180, PETRI_TRANSITIONS=194} [2024-06-14 13:52:49,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 13:52:49,714 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 194 transitions, 1948 flow [2024-06-14 13:52:49,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,714 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] [2024-06-14 13:52:49,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:49,714 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:49,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,715 INFO L85 PathProgramCache]: Analyzing trace with hash -198973430, now seen corresponding path program 1 times [2024-06-14 13:52:49,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213036344] [2024-06-14 13:52:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:50,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:50,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213036344] [2024-06-14 13:52:50,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213036344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:50,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941129916] [2024-06-14 13:52:50,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:50,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:50,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 194 transitions, 1948 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:50,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:50,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:50,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,523 INFO L124 PetriNetUnfolderBase]: 1417/2393 cut-off events. [2024-06-14 13:52:50,524 INFO L125 PetriNetUnfolderBase]: For 80441/80453 co-relation queries the response was YES. [2024-06-14 13:52:50,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14104 conditions, 2393 events. 1417/2393 cut-off events. For 80441/80453 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13654 event pairs, 343 based on Foata normal form. 13/2406 useless extension candidates. Maximal degree in co-relation 14015. Up to 2052 conditions per place. [2024-06-14 13:52:50,545 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 159 selfloop transitions, 63 changer transitions 0/228 dead transitions. [2024-06-14 13:52:50,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 228 transitions, 2758 flow [2024-06-14 13:52:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:52:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:52:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:52:50,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:52:50,560 INFO L175 Difference]: Start difference. First operand has 180 places, 194 transitions, 1948 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:52:50,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 228 transitions, 2758 flow [2024-06-14 13:52:50,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2668 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:50,758 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2134 flow [2024-06-14 13:52:50,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2134, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-14 13:52:50,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 13:52:50,760 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2134 flow [2024-06-14 13:52:50,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:50,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:50,760 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] [2024-06-14 13:52:50,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:50,761 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:50,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:50,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1276828554, now seen corresponding path program 3 times [2024-06-14 13:52:50,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:50,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395135156] [2024-06-14 13:52:50,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:51,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395135156] [2024-06-14 13:52:51,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395135156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:51,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125454234] [2024-06-14 13:52:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:51,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:51,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:51,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:51,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:51,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:51,557 INFO L124 PetriNetUnfolderBase]: 1440/2429 cut-off events. [2024-06-14 13:52:51,557 INFO L125 PetriNetUnfolderBase]: For 86037/86049 co-relation queries the response was YES. [2024-06-14 13:52:51,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14686 conditions, 2429 events. 1440/2429 cut-off events. For 86037/86049 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 13885 event pairs, 343 based on Foata normal form. 13/2442 useless extension candidates. Maximal degree in co-relation 14596. Up to 2116 conditions per place. [2024-06-14 13:52:51,579 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2024-06-14 13:52:51,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 234 transitions, 2861 flow [2024-06-14 13:52:51,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:51,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:52:51,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:52:51,581 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2134 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:52:51,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 234 transitions, 2861 flow [2024-06-14 13:52:51,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2730 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:51,760 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2268 flow [2024-06-14 13:52:51,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2268, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-14 13:52:51,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-14 13:52:51,760 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2268 flow [2024-06-14 13:52:51,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,761 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] [2024-06-14 13:52:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:51,761 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:51,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1275876598, now seen corresponding path program 2 times [2024-06-14 13:52:51,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801580491] [2024-06-14 13:52:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:52,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:52,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801580491] [2024-06-14 13:52:52,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801580491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:52,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:52,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:52,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293871063] [2024-06-14 13:52:52,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:52,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:52,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:52,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:52,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:52,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:52,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2268 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:52,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:52,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:52,607 INFO L124 PetriNetUnfolderBase]: 1461/2464 cut-off events. [2024-06-14 13:52:52,607 INFO L125 PetriNetUnfolderBase]: For 91692/91704 co-relation queries the response was YES. [2024-06-14 13:52:52,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15104 conditions, 2464 events. 1461/2464 cut-off events. For 91692/91704 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14168 event pairs, 343 based on Foata normal form. 13/2477 useless extension candidates. Maximal degree in co-relation 15011. Up to 2102 conditions per place. [2024-06-14 13:52:52,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 164 selfloop transitions, 75 changer transitions 0/245 dead transitions. [2024-06-14 13:52:52,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 245 transitions, 3084 flow [2024-06-14 13:52:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:52:52,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:52:52,631 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2268 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:52:52,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 245 transitions, 3084 flow [2024-06-14 13:52:52,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 245 transitions, 2990 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:52,800 INFO L231 Difference]: Finished difference. Result has 197 places, 224 transitions, 2442 flow [2024-06-14 13:52:52,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2174, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2442, PETRI_PLACES=197, PETRI_TRANSITIONS=224} [2024-06-14 13:52:52,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 13:52:52,800 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 224 transitions, 2442 flow [2024-06-14 13:52:52,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,801 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] [2024-06-14 13:52:52,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:52,801 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:52,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1276828740, now seen corresponding path program 3 times [2024-06-14 13:52:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493703425] [2024-06-14 13:52:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:53,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:53,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:53,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493703425] [2024-06-14 13:52:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493703425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:53,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:53,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243007705] [2024-06-14 13:52:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:53,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:53,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:53,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:53,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 224 transitions, 2442 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:53,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:53,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,620 INFO L124 PetriNetUnfolderBase]: 1458/2460 cut-off events. [2024-06-14 13:52:53,620 INFO L125 PetriNetUnfolderBase]: For 94715/94727 co-relation queries the response was YES. [2024-06-14 13:52:53,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15166 conditions, 2460 events. 1458/2460 cut-off events. For 94715/94727 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14114 event pairs, 343 based on Foata normal form. 13/2473 useless extension candidates. Maximal degree in co-relation 15072. Up to 2099 conditions per place. [2024-06-14 13:52:53,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 76 changer transitions 0/247 dead transitions. [2024-06-14 13:52:53,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 247 transitions, 3158 flow [2024-06-14 13:52:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:52:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:52:53,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 13:52:53,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-14 13:52:53,640 INFO L175 Difference]: Start difference. First operand has 197 places, 224 transitions, 2442 flow. Second operand 11 states and 228 transitions. [2024-06-14 13:52:53,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 247 transitions, 3158 flow [2024-06-14 13:52:53,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 247 transitions, 3019 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:53,845 INFO L231 Difference]: Finished difference. Result has 203 places, 224 transitions, 2461 flow [2024-06-14 13:52:53,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2461, PETRI_PLACES=203, PETRI_TRANSITIONS=224} [2024-06-14 13:52:53,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 13:52:53,846 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 224 transitions, 2461 flow [2024-06-14 13:52:53,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:53,847 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] [2024-06-14 13:52:53,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:53,847 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:53,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1401647106, now seen corresponding path program 4 times [2024-06-14 13:52:53,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51369021] [2024-06-14 13:52:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51369021] [2024-06-14 13:52:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51369021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:54,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411408687] [2024-06-14 13:52:54,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:54,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:54,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:54,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:54,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 224 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:54,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,662 INFO L124 PetriNetUnfolderBase]: 1486/2500 cut-off events. [2024-06-14 13:52:54,662 INFO L125 PetriNetUnfolderBase]: For 105982/105990 co-relation queries the response was YES. [2024-06-14 13:52:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15486 conditions, 2500 events. 1486/2500 cut-off events. For 105982/105990 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14309 event pairs, 333 based on Foata normal form. 16/2516 useless extension candidates. Maximal degree in co-relation 15391. Up to 2184 conditions per place. [2024-06-14 13:52:54,685 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 210 selfloop transitions, 32 changer transitions 0/248 dead transitions. [2024-06-14 13:52:54,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 248 transitions, 3041 flow [2024-06-14 13:52:54,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:54,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 13:52:54,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 13:52:54,686 INFO L175 Difference]: Start difference. First operand has 203 places, 224 transitions, 2461 flow. Second operand 8 states and 171 transitions. [2024-06-14 13:52:54,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 248 transitions, 3041 flow [2024-06-14 13:52:54,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 248 transitions, 2865 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:52:54,926 INFO L231 Difference]: Finished difference. Result has 202 places, 225 transitions, 2372 flow [2024-06-14 13:52:54,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2372, PETRI_PLACES=202, PETRI_TRANSITIONS=225} [2024-06-14 13:52:54,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 13:52:54,927 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 225 transitions, 2372 flow [2024-06-14 13:52:54,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:54,928 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] [2024-06-14 13:52:54,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:54,928 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:54,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1412371866, now seen corresponding path program 5 times [2024-06-14 13:52:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:54,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150996571] [2024-06-14 13:52:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150996571] [2024-06-14 13:52:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150996571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:55,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:55,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:55,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171715603] [2024-06-14 13:52:55,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:55,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:55,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:55,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:55,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:55,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 225 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:55,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:55,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:55,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:55,721 INFO L124 PetriNetUnfolderBase]: 1501/2526 cut-off events. [2024-06-14 13:52:55,722 INFO L125 PetriNetUnfolderBase]: For 108049/108049 co-relation queries the response was YES. [2024-06-14 13:52:55,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15562 conditions, 2526 events. 1501/2526 cut-off events. For 108049/108049 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14506 event pairs, 347 based on Foata normal form. 8/2533 useless extension candidates. Maximal degree in co-relation 15466. Up to 2241 conditions per place. [2024-06-14 13:52:55,744 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 29 changer transitions 0/241 dead transitions. [2024-06-14 13:52:55,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 241 transitions, 2920 flow [2024-06-14 13:52:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 13:52:55,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:52:55,745 INFO L175 Difference]: Start difference. First operand has 202 places, 225 transitions, 2372 flow. Second operand 6 states and 132 transitions. [2024-06-14 13:52:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 241 transitions, 2920 flow [2024-06-14 13:52:56,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 241 transitions, 2852 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:56,056 INFO L231 Difference]: Finished difference. Result has 202 places, 226 transitions, 2384 flow [2024-06-14 13:52:56,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2306, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2384, PETRI_PLACES=202, PETRI_TRANSITIONS=226} [2024-06-14 13:52:56,056 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 13:52:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 226 transitions, 2384 flow [2024-06-14 13:52:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:56,057 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] [2024-06-14 13:52:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:56,057 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:56,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1401320676, now seen corresponding path program 6 times [2024-06-14 13:52:56,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:56,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891412562] [2024-06-14 13:52:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:56,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891412562] [2024-06-14 13:52:56,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891412562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:56,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549283464] [2024-06-14 13:52:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:56,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:56,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 226 transitions, 2384 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:56,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:56,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:56,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:56,927 INFO L124 PetriNetUnfolderBase]: 1488/2510 cut-off events. [2024-06-14 13:52:56,927 INFO L125 PetriNetUnfolderBase]: For 98891/98899 co-relation queries the response was YES. [2024-06-14 13:52:56,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15142 conditions, 2510 events. 1488/2510 cut-off events. For 98891/98899 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14432 event pairs, 246 based on Foata normal form. 14/2524 useless extension candidates. Maximal degree in co-relation 15045. Up to 2036 conditions per place. [2024-06-14 13:52:56,947 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 43 changer transitions 0/255 dead transitions. [2024-06-14 13:52:56,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 255 transitions, 2991 flow [2024-06-14 13:52:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:56,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:52:56,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:52:56,948 INFO L175 Difference]: Start difference. First operand has 202 places, 226 transitions, 2384 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:52:56,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 255 transitions, 2991 flow [2024-06-14 13:52:57,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 255 transitions, 2926 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:57,219 INFO L231 Difference]: Finished difference. Result has 206 places, 226 transitions, 2413 flow [2024-06-14 13:52:57,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2413, PETRI_PLACES=206, PETRI_TRANSITIONS=226} [2024-06-14 13:52:57,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 13:52:57,220 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 226 transitions, 2413 flow [2024-06-14 13:52:57,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,220 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] [2024-06-14 13:52:57,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:57,220 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:57,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,221 INFO L85 PathProgramCache]: Analyzing trace with hash -55203056, now seen corresponding path program 4 times [2024-06-14 13:52:57,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947365464] [2024-06-14 13:52:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947365464] [2024-06-14 13:52:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947365464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:57,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884708600] [2024-06-14 13:52:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:57,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:57,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 226 transitions, 2413 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:57,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:57,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,991 INFO L124 PetriNetUnfolderBase]: 1501/2532 cut-off events. [2024-06-14 13:52:57,992 INFO L125 PetriNetUnfolderBase]: For 98966/98978 co-relation queries the response was YES. [2024-06-14 13:52:58,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15492 conditions, 2532 events. 1501/2532 cut-off events. For 98966/98978 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14632 event pairs, 345 based on Foata normal form. 13/2545 useless extension candidates. Maximal degree in co-relation 15394. Up to 2161 conditions per place. [2024-06-14 13:52:58,018 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 59 changer transitions 0/261 dead transitions. [2024-06-14 13:52:58,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 261 transitions, 3271 flow [2024-06-14 13:52:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:58,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:52:58,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:52:58,020 INFO L175 Difference]: Start difference. First operand has 206 places, 226 transitions, 2413 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:52:58,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 261 transitions, 3271 flow [2024-06-14 13:52:58,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 261 transitions, 3171 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:58,272 INFO L231 Difference]: Finished difference. Result has 207 places, 232 transitions, 2529 flow [2024-06-14 13:52:58,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2321, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2529, PETRI_PLACES=207, PETRI_TRANSITIONS=232} [2024-06-14 13:52:58,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 13:52:58,273 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 232 transitions, 2529 flow [2024-06-14 13:52:58,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,273 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] [2024-06-14 13:52:58,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:58,273 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:58,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,274 INFO L85 PathProgramCache]: Analyzing trace with hash 457335230, now seen corresponding path program 5 times [2024-06-14 13:52:58,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168254893] [2024-06-14 13:52:58,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:58,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:58,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168254893] [2024-06-14 13:52:58,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168254893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:58,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:58,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:58,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868228169] [2024-06-14 13:52:58,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:58,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:58,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:58,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:58,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:58,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:58,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 232 transitions, 2529 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:58,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:58,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:59,082 INFO L124 PetriNetUnfolderBase]: 1514/2554 cut-off events. [2024-06-14 13:52:59,082 INFO L125 PetriNetUnfolderBase]: For 96568/96580 co-relation queries the response was YES. [2024-06-14 13:52:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15553 conditions, 2554 events. 1514/2554 cut-off events. For 96568/96580 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14815 event pairs, 345 based on Foata normal form. 13/2567 useless extension candidates. Maximal degree in co-relation 15455. Up to 2176 conditions per place. [2024-06-14 13:52:59,109 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 68 changer transitions 0/265 dead transitions. [2024-06-14 13:52:59,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3397 flow [2024-06-14 13:52:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:52:59,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 13:52:59,111 INFO L175 Difference]: Start difference. First operand has 207 places, 232 transitions, 2529 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:52:59,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3397 flow [2024-06-14 13:52:59,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 265 transitions, 3181 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:59,385 INFO L231 Difference]: Finished difference. Result has 211 places, 238 transitions, 2551 flow [2024-06-14 13:52:59,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2347, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=211, PETRI_TRANSITIONS=238} [2024-06-14 13:52:59,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-14 13:52:59,386 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 238 transitions, 2551 flow [2024-06-14 13:52:59,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:59,386 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] [2024-06-14 13:52:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:59,387 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:59,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -854065210, now seen corresponding path program 6 times [2024-06-14 13:52:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080156159] [2024-06-14 13:52:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:59,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:59,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:59,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080156159] [2024-06-14 13:52:59,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080156159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:59,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:59,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821863942] [2024-06-14 13:52:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:59,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:59,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 238 transitions, 2551 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:59,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:59,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:00,229 INFO L124 PetriNetUnfolderBase]: 1511/2549 cut-off events. [2024-06-14 13:53:00,229 INFO L125 PetriNetUnfolderBase]: For 98353/98361 co-relation queries the response was YES. [2024-06-14 13:53:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2549 events. 1511/2549 cut-off events. For 98353/98361 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14756 event pairs, 357 based on Foata normal form. 9/2557 useless extension candidates. Maximal degree in co-relation 15375. Up to 2173 conditions per place. [2024-06-14 13:53:00,248 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 61 changer transitions 0/259 dead transitions. [2024-06-14 13:53:00,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 259 transitions, 3301 flow [2024-06-14 13:53:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:53:00,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:00,249 INFO L175 Difference]: Start difference. First operand has 211 places, 238 transitions, 2551 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:53:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 259 transitions, 3301 flow [2024-06-14 13:53:00,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 259 transitions, 3159 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:00,505 INFO L231 Difference]: Finished difference. Result has 212 places, 238 transitions, 2537 flow [2024-06-14 13:53:00,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2409, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2537, PETRI_PLACES=212, PETRI_TRANSITIONS=238} [2024-06-14 13:53:00,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 13:53:00,505 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 238 transitions, 2537 flow [2024-06-14 13:53:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,506 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] [2024-06-14 13:53:00,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:53:00,506 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:00,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash -853945240, now seen corresponding path program 7 times [2024-06-14 13:53:00,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844197867] [2024-06-14 13:53:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:00,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844197867] [2024-06-14 13:53:00,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844197867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:00,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:00,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397517970] [2024-06-14 13:53:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:00,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:00,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:00,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:00,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 238 transitions, 2537 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:00,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:00,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:01,327 INFO L124 PetriNetUnfolderBase]: 1508/2546 cut-off events. [2024-06-14 13:53:01,328 INFO L125 PetriNetUnfolderBase]: For 100826/100838 co-relation queries the response was YES. [2024-06-14 13:53:01,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15450 conditions, 2546 events. 1508/2546 cut-off events. For 100826/100838 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14748 event pairs, 345 based on Foata normal form. 13/2559 useless extension candidates. Maximal degree in co-relation 15350. Up to 2244 conditions per place. [2024-06-14 13:53:01,350 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 214 selfloop transitions, 34 changer transitions 0/254 dead transitions. [2024-06-14 13:53:01,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 254 transitions, 3073 flow [2024-06-14 13:53:01,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:01,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:53:01,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:53:01,352 INFO L175 Difference]: Start difference. First operand has 212 places, 238 transitions, 2537 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:53:01,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 254 transitions, 3073 flow [2024-06-14 13:53:01,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 254 transitions, 2933 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:01,599 INFO L231 Difference]: Finished difference. Result has 213 places, 238 transitions, 2471 flow [2024-06-14 13:53:01,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2471, PETRI_PLACES=213, PETRI_TRANSITIONS=238} [2024-06-14 13:53:01,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 13:53:01,599 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 238 transitions, 2471 flow [2024-06-14 13:53:01,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,600 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] [2024-06-14 13:53:01,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:53:01,600 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:01,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,600 INFO L85 PathProgramCache]: Analyzing trace with hash -848403928, now seen corresponding path program 1 times [2024-06-14 13:53:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937363980] [2024-06-14 13:53:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937363980] [2024-06-14 13:53:01,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937363980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203221690] [2024-06-14 13:53:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:02,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:02,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 238 transitions, 2471 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:02,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:02,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:02,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,408 INFO L124 PetriNetUnfolderBase]: 1521/2568 cut-off events. [2024-06-14 13:53:02,408 INFO L125 PetriNetUnfolderBase]: For 105757/105769 co-relation queries the response was YES. [2024-06-14 13:53:02,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15638 conditions, 2568 events. 1521/2568 cut-off events. For 105757/105769 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14904 event pairs, 344 based on Foata normal form. 13/2581 useless extension candidates. Maximal degree in co-relation 15537. Up to 2228 conditions per place. [2024-06-14 13:53:02,432 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 201 selfloop transitions, 53 changer transitions 0/260 dead transitions. [2024-06-14 13:53:02,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 260 transitions, 3213 flow [2024-06-14 13:53:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 13:53:02,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 13:53:02,433 INFO L175 Difference]: Start difference. First operand has 213 places, 238 transitions, 2471 flow. Second operand 8 states and 173 transitions. [2024-06-14 13:53:02,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 260 transitions, 3213 flow [2024-06-14 13:53:02,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 260 transitions, 3133 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:02,703 INFO L231 Difference]: Finished difference. Result has 216 places, 244 transitions, 2609 flow [2024-06-14 13:53:02,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2391, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2609, PETRI_PLACES=216, PETRI_TRANSITIONS=244} [2024-06-14 13:53:02,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 13:53:02,703 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 244 transitions, 2609 flow [2024-06-14 13:53:02,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:02,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:02,704 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] [2024-06-14 13:53:02,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:53:02,704 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:02,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:02,705 INFO L85 PathProgramCache]: Analyzing trace with hash -853945054, now seen corresponding path program 4 times [2024-06-14 13:53:02,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:02,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345575267] [2024-06-14 13:53:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:02,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:03,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:03,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345575267] [2024-06-14 13:53:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345575267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:03,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:03,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:03,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322564694] [2024-06-14 13:53:03,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:03,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:03,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:03,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:03,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:03,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:03,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 244 transitions, 2609 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:03,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:03,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:03,571 INFO L124 PetriNetUnfolderBase]: 1518/2562 cut-off events. [2024-06-14 13:53:03,571 INFO L125 PetriNetUnfolderBase]: For 109289/109301 co-relation queries the response was YES. [2024-06-14 13:53:03,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15896 conditions, 2562 events. 1518/2562 cut-off events. For 109289/109301 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14856 event pairs, 344 based on Foata normal form. 13/2575 useless extension candidates. Maximal degree in co-relation 15794. Up to 2227 conditions per place. [2024-06-14 13:53:03,593 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 202 selfloop transitions, 54 changer transitions 0/262 dead transitions. [2024-06-14 13:53:03,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 262 transitions, 3267 flow [2024-06-14 13:53:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:03,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:53:03,595 INFO L175 Difference]: Start difference. First operand has 216 places, 244 transitions, 2609 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:03,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 262 transitions, 3267 flow [2024-06-14 13:53:03,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 262 transitions, 3135 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:03,865 INFO L231 Difference]: Finished difference. Result has 218 places, 244 transitions, 2597 flow [2024-06-14 13:53:03,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2597, PETRI_PLACES=218, PETRI_TRANSITIONS=244} [2024-06-14 13:53:03,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 13:53:03,865 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 244 transitions, 2597 flow [2024-06-14 13:53:03,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:03,866 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] [2024-06-14 13:53:03,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:53:03,866 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:03,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:03,866 INFO L85 PathProgramCache]: Analyzing trace with hash 500384372, now seen corresponding path program 2 times [2024-06-14 13:53:03,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:03,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205928144] [2024-06-14 13:53:03,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:03,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:04,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205928144] [2024-06-14 13:53:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205928144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:04,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:04,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893203889] [2024-06-14 13:53:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:04,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 244 transitions, 2597 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:04,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,662 INFO L124 PetriNetUnfolderBase]: 1547/2609 cut-off events. [2024-06-14 13:53:04,662 INFO L125 PetriNetUnfolderBase]: For 111097/111109 co-relation queries the response was YES. [2024-06-14 13:53:04,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16296 conditions, 2609 events. 1547/2609 cut-off events. For 111097/111109 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15146 event pairs, 344 based on Foata normal form. 13/2622 useless extension candidates. Maximal degree in co-relation 16193. Up to 2285 conditions per place. [2024-06-14 13:53:04,688 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 219 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-06-14 13:53:04,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 271 transitions, 3422 flow [2024-06-14 13:53:04,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:53:04,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:53:04,690 INFO L175 Difference]: Start difference. First operand has 218 places, 244 transitions, 2597 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:53:04,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 271 transitions, 3422 flow [2024-06-14 13:53:04,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 271 transitions, 3335 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:04,984 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2802 flow [2024-06-14 13:53:04,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2510, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2802, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-14 13:53:04,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 13:53:04,985 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2802 flow [2024-06-14 13:53:04,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:04,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:04,985 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] [2024-06-14 13:53:04,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:53:04,985 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:04,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash 500372840, now seen corresponding path program 8 times [2024-06-14 13:53:04,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:04,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757609350] [2024-06-14 13:53:04,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:04,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:05,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:05,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757609350] [2024-06-14 13:53:05,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757609350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:05,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:05,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993636555] [2024-06-14 13:53:05,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:05,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:05,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:05,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:05,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2802 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:05,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:05,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:05,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:05,868 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-14 13:53:05,869 INFO L125 PetriNetUnfolderBase]: For 113893/113907 co-relation queries the response was YES. [2024-06-14 13:53:05,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16377 conditions, 2605 events. 1544/2605 cut-off events. For 113893/113907 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 15151 event pairs, 344 based on Foata normal form. 15/2620 useless extension candidates. Maximal degree in co-relation 16272. Up to 2227 conditions per place. [2024-06-14 13:53:05,894 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 60 changer transitions 0/283 dead transitions. [2024-06-14 13:53:05,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 283 transitions, 3528 flow [2024-06-14 13:53:05,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:05,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:53:05,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 13:53:05,896 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2802 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:53:05,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 283 transitions, 3528 flow [2024-06-14 13:53:06,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 283 transitions, 3457 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:06,227 INFO L231 Difference]: Finished difference. Result has 225 places, 256 transitions, 2867 flow [2024-06-14 13:53:06,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2733, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2867, PETRI_PLACES=225, PETRI_TRANSITIONS=256} [2024-06-14 13:53:06,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-14 13:53:06,228 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 256 transitions, 2867 flow [2024-06-14 13:53:06,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,229 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] [2024-06-14 13:53:06,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:53:06,229 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:06,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,229 INFO L85 PathProgramCache]: Analyzing trace with hash 500384186, now seen corresponding path program 5 times [2024-06-14 13:53:06,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827871746] [2024-06-14 13:53:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827871746] [2024-06-14 13:53:06,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827871746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783594096] [2024-06-14 13:53:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:06,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:06,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:06,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 256 transitions, 2867 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:06,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:06,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,076 INFO L124 PetriNetUnfolderBase]: 1549/2614 cut-off events. [2024-06-14 13:53:07,077 INFO L125 PetriNetUnfolderBase]: For 114350/114364 co-relation queries the response was YES. [2024-06-14 13:53:07,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16580 conditions, 2614 events. 1549/2614 cut-off events. For 114350/114364 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15194 event pairs, 344 based on Foata normal form. 15/2629 useless extension candidates. Maximal degree in co-relation 16474. Up to 2270 conditions per place. [2024-06-14 13:53:07,104 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 214 selfloop transitions, 57 changer transitions 0/277 dead transitions. [2024-06-14 13:53:07,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 277 transitions, 3603 flow [2024-06-14 13:53:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:53:07,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:53:07,106 INFO L175 Difference]: Start difference. First operand has 225 places, 256 transitions, 2867 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:53:07,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 277 transitions, 3603 flow [2024-06-14 13:53:07,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 277 transitions, 3441 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:07,505 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2879 flow [2024-06-14 13:53:07,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2879, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-14 13:53:07,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:07,506 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2879 flow [2024-06-14 13:53:07,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:07,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:07,506 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] [2024-06-14 13:53:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:53:07,506 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:07,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:07,507 INFO L85 PathProgramCache]: Analyzing trace with hash 500378792, now seen corresponding path program 3 times [2024-06-14 13:53:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945905607] [2024-06-14 13:53:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:07,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:07,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945905607] [2024-06-14 13:53:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945905607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386802907] [2024-06-14 13:53:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:07,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:07,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2879 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:07,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:07,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:07,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:08,309 INFO L124 PetriNetUnfolderBase]: 1546/2608 cut-off events. [2024-06-14 13:53:08,310 INFO L125 PetriNetUnfolderBase]: For 108964/108978 co-relation queries the response was YES. [2024-06-14 13:53:08,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16359 conditions, 2608 events. 1546/2608 cut-off events. For 108964/108978 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15142 event pairs, 344 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16254. Up to 2285 conditions per place. [2024-06-14 13:53:08,334 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 220 selfloop transitions, 46 changer transitions 0/272 dead transitions. [2024-06-14 13:53:08,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 272 transitions, 3443 flow [2024-06-14 13:53:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:53:08,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:53:08,342 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2879 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:53:08,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 272 transitions, 3443 flow [2024-06-14 13:53:08,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 272 transitions, 3275 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:08,685 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2813 flow [2024-06-14 13:53:08,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2711, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2813, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-14 13:53:08,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:08,686 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2813 flow [2024-06-14 13:53:08,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,687 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] [2024-06-14 13:53:08,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:53:08,687 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:08,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash 500378420, now seen corresponding path program 9 times [2024-06-14 13:53:08,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154638033] [2024-06-14 13:53:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:09,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:09,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:09,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154638033] [2024-06-14 13:53:09,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154638033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:09,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:09,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:09,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491423797] [2024-06-14 13:53:09,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:09,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:09,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:09,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:09,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:09,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:09,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2813 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:09,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:09,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:09,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,561 INFO L124 PetriNetUnfolderBase]: 1543/2606 cut-off events. [2024-06-14 13:53:09,561 INFO L125 PetriNetUnfolderBase]: For 107316/107330 co-relation queries the response was YES. [2024-06-14 13:53:09,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16223 conditions, 2606 events. 1543/2606 cut-off events. For 107316/107330 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15178 event pairs, 344 based on Foata normal form. 15/2621 useless extension candidates. Maximal degree in co-relation 16118. Up to 2227 conditions per place. [2024-06-14 13:53:09,584 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 60 changer transitions 0/281 dead transitions. [2024-06-14 13:53:09,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 281 transitions, 3419 flow [2024-06-14 13:53:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:09,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:53:09,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:53:09,586 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2813 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:53:09,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 281 transitions, 3419 flow [2024-06-14 13:53:09,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 281 transitions, 3309 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:09,883 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2835 flow [2024-06-14 13:53:09,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2835, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-14 13:53:09,884 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:09,884 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2835 flow [2024-06-14 13:53:09,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:09,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:09,884 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] [2024-06-14 13:53:09,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:53:09,884 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:09,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash 500373026, now seen corresponding path program 6 times [2024-06-14 13:53:09,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:09,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926129957] [2024-06-14 13:53:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:09,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926129957] [2024-06-14 13:53:10,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926129957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:10,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762771982] [2024-06-14 13:53:10,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:10,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:10,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:10,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:10,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2835 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:10,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:10,702 INFO L124 PetriNetUnfolderBase]: 1540/2600 cut-off events. [2024-06-14 13:53:10,703 INFO L125 PetriNetUnfolderBase]: For 106383/106397 co-relation queries the response was YES. [2024-06-14 13:53:10,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16201 conditions, 2600 events. 1540/2600 cut-off events. For 106383/106397 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15109 event pairs, 344 based on Foata normal form. 15/2615 useless extension candidates. Maximal degree in co-relation 16096. Up to 2259 conditions per place. [2024-06-14 13:53:10,729 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 57 changer transitions 0/275 dead transitions. [2024-06-14 13:53:10,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 275 transitions, 3413 flow [2024-06-14 13:53:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:53:10,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:10,730 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2835 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:53:10,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 275 transitions, 3413 flow [2024-06-14 13:53:11,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 275 transitions, 3262 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:11,042 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 2816 flow [2024-06-14 13:53:11,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2816, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-14 13:53:11,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:11,043 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 2816 flow [2024-06-14 13:53:11,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:11,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:11,043 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] [2024-06-14 13:53:11,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:53:11,043 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:11,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1412374842, now seen corresponding path program 7 times [2024-06-14 13:53:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:11,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381994956] [2024-06-14 13:53:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:11,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:11,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:11,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381994956] [2024-06-14 13:53:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381994956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913258092] [2024-06-14 13:53:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:11,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:11,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:11,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:11,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:11,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 2816 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:11,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:11,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:11,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:11,818 INFO L124 PetriNetUnfolderBase]: 1545/2605 cut-off events. [2024-06-14 13:53:11,819 INFO L125 PetriNetUnfolderBase]: For 106472/106478 co-relation queries the response was YES. [2024-06-14 13:53:11,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16198 conditions, 2605 events. 1545/2605 cut-off events. For 106472/106478 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 15110 event pairs, 366 based on Foata normal form. 7/2611 useless extension candidates. Maximal degree in co-relation 16093. Up to 2230 conditions per place. [2024-06-14 13:53:11,844 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 74 changer transitions 0/273 dead transitions. [2024-06-14 13:53:11,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 273 transitions, 3517 flow [2024-06-14 13:53:11,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-14 13:53:11,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:53:11,846 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 2816 flow. Second operand 6 states and 134 transitions. [2024-06-14 13:53:11,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 273 transitions, 3517 flow [2024-06-14 13:53:12,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 273 transitions, 3379 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:12,185 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2875 flow [2024-06-14 13:53:12,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2682, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-14 13:53:12,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 13:53:12,187 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2875 flow [2024-06-14 13:53:12,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:12,187 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] [2024-06-14 13:53:12,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:53:12,188 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:12,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:12,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1401650082, now seen corresponding path program 8 times [2024-06-14 13:53:12,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:12,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159650493] [2024-06-14 13:53:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:12,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:12,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:12,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159650493] [2024-06-14 13:53:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159650493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:12,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:12,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:12,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489549669] [2024-06-14 13:53:12,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:12,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:12,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2875 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:12,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:12,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:12,998 INFO L124 PetriNetUnfolderBase]: 1550/2616 cut-off events. [2024-06-14 13:53:12,998 INFO L125 PetriNetUnfolderBase]: For 102736/102750 co-relation queries the response was YES. [2024-06-14 13:53:13,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16192 conditions, 2616 events. 1550/2616 cut-off events. For 102736/102750 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15263 event pairs, 344 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16088. Up to 2236 conditions per place. [2024-06-14 13:53:13,029 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 82 changer transitions 0/284 dead transitions. [2024-06-14 13:53:13,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 284 transitions, 3622 flow [2024-06-14 13:53:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:53:13,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:53:13,030 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2875 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:53:13,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 284 transitions, 3622 flow [2024-06-14 13:53:13,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 284 transitions, 3494 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:13,365 INFO L231 Difference]: Finished difference. Result has 227 places, 265 transitions, 2966 flow [2024-06-14 13:53:13,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2966, PETRI_PLACES=227, PETRI_TRANSITIONS=265} [2024-06-14 13:53:13,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-14 13:53:13,365 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 265 transitions, 2966 flow [2024-06-14 13:53:13,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:13,366 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] [2024-06-14 13:53:13,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:53:13,366 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:13,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:13,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412746, now seen corresponding path program 10 times [2024-06-14 13:53:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644380723] [2024-06-14 13:53:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644380723] [2024-06-14 13:53:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644380723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:13,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062617243] [2024-06-14 13:53:13,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:13,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:13,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:13,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:13,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 265 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:13,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:13,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,183 INFO L124 PetriNetUnfolderBase]: 1547/2612 cut-off events. [2024-06-14 13:53:14,184 INFO L125 PetriNetUnfolderBase]: For 105261/105275 co-relation queries the response was YES. [2024-06-14 13:53:14,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2612 events. 1547/2612 cut-off events. For 105261/105275 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15166 event pairs, 344 based on Foata normal form. 15/2627 useless extension candidates. Maximal degree in co-relation 16115. Up to 2197 conditions per place. [2024-06-14 13:53:14,208 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 206 selfloop transitions, 83 changer transitions 0/295 dead transitions. [2024-06-14 13:53:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 295 transitions, 3620 flow [2024-06-14 13:53:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:14,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:53:14,210 INFO L175 Difference]: Start difference. First operand has 227 places, 265 transitions, 2966 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:14,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 295 transitions, 3620 flow [2024-06-14 13:53:14,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 295 transitions, 3404 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:14,469 INFO L231 Difference]: Finished difference. Result has 228 places, 265 transitions, 2934 flow [2024-06-14 13:53:14,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2934, PETRI_PLACES=228, PETRI_TRANSITIONS=265} [2024-06-14 13:53:14,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 13:53:14,470 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 265 transitions, 2934 flow [2024-06-14 13:53:14,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:14,470 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] [2024-06-14 13:53:14,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:53:14,471 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:14,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:14,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1160144280, now seen corresponding path program 9 times [2024-06-14 13:53:14,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:14,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470488414] [2024-06-14 13:53:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:14,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:14,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:14,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:14,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470488414] [2024-06-14 13:53:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470488414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:14,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:14,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:14,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19004565] [2024-06-14 13:53:14,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:14,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:14,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:14,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:14,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:14,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:14,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 265 transitions, 2934 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:14,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:14,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:15,244 INFO L124 PetriNetUnfolderBase]: 1544/2608 cut-off events. [2024-06-14 13:53:15,244 INFO L125 PetriNetUnfolderBase]: For 103849/103863 co-relation queries the response was YES. [2024-06-14 13:53:15,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 2608 events. 1544/2608 cut-off events. For 103849/103863 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15184 event pairs, 344 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16060. Up to 2229 conditions per place. [2024-06-14 13:53:15,270 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 195 selfloop transitions, 86 changer transitions 0/287 dead transitions. [2024-06-14 13:53:15,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 287 transitions, 3550 flow [2024-06-14 13:53:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:53:15,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:53:15,272 INFO L175 Difference]: Start difference. First operand has 228 places, 265 transitions, 2934 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:53:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 287 transitions, 3550 flow [2024-06-14 13:53:15,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 287 transitions, 3350 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:15,580 INFO L231 Difference]: Finished difference. Result has 229 places, 265 transitions, 2920 flow [2024-06-14 13:53:15,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2734, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2920, PETRI_PLACES=229, PETRI_TRANSITIONS=265} [2024-06-14 13:53:15,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 13:53:15,580 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 265 transitions, 2920 flow [2024-06-14 13:53:15,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,581 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] [2024-06-14 13:53:15,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:53:15,581 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:15,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1412771580, now seen corresponding path program 1 times [2024-06-14 13:53:15,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939300368] [2024-06-14 13:53:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:15,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:15,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939300368] [2024-06-14 13:53:15,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939300368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:15,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:15,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904262817] [2024-06-14 13:53:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:15,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:15,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:16,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:16,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 265 transitions, 2920 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:16,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:16,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,427 INFO L124 PetriNetUnfolderBase]: 1564/2635 cut-off events. [2024-06-14 13:53:16,428 INFO L125 PetriNetUnfolderBase]: For 102796/102796 co-relation queries the response was YES. [2024-06-14 13:53:16,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16115 conditions, 2635 events. 1564/2635 cut-off events. For 102796/102796 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15247 event pairs, 335 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 16010. Up to 2234 conditions per place. [2024-06-14 13:53:16,456 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 34 changer transitions 0/287 dead transitions. [2024-06-14 13:53:16,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 3599 flow [2024-06-14 13:53:16,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:16,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:53:16,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:16,458 INFO L175 Difference]: Start difference. First operand has 229 places, 265 transitions, 2920 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:53:16,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 3599 flow [2024-06-14 13:53:16,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 287 transitions, 3399 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:16,743 INFO L231 Difference]: Finished difference. Result has 226 places, 269 transitions, 2844 flow [2024-06-14 13:53:16,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2844, PETRI_PLACES=226, PETRI_TRANSITIONS=269} [2024-06-14 13:53:16,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:53:16,744 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 269 transitions, 2844 flow [2024-06-14 13:53:16,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:16,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:16,744 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] [2024-06-14 13:53:16,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:53:16,745 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:16,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1204337510, now seen corresponding path program 7 times [2024-06-14 13:53:16,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:16,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890540916] [2024-06-14 13:53:16,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:16,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:17,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890540916] [2024-06-14 13:53:17,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890540916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269812214] [2024-06-14 13:53:17,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:17,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:17,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:17,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:17,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 269 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:17,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:17,603 INFO L124 PetriNetUnfolderBase]: 1579/2665 cut-off events. [2024-06-14 13:53:17,604 INFO L125 PetriNetUnfolderBase]: For 99153/99153 co-relation queries the response was YES. [2024-06-14 13:53:17,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16105 conditions, 2665 events. 1579/2665 cut-off events. For 99153/99153 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15523 event pairs, 329 based on Foata normal form. 8/2673 useless extension candidates. Maximal degree in co-relation 16000. Up to 2353 conditions per place. [2024-06-14 13:53:17,628 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 254 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-14 13:53:17,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 295 transitions, 3526 flow [2024-06-14 13:53:17,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 13:53:17,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-14 13:53:17,629 INFO L175 Difference]: Start difference. First operand has 226 places, 269 transitions, 2844 flow. Second operand 9 states and 188 transitions. [2024-06-14 13:53:17,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 295 transitions, 3526 flow [2024-06-14 13:53:17,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 295 transitions, 3485 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:17,892 INFO L231 Difference]: Finished difference. Result has 233 places, 270 transitions, 2892 flow [2024-06-14 13:53:17,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=233, PETRI_TRANSITIONS=270} [2024-06-14 13:53:17,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 13:53:17,893 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 270 transitions, 2892 flow [2024-06-14 13:53:17,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,893 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] [2024-06-14 13:53:17,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:53:17,893 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:17,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1282336186, now seen corresponding path program 4 times [2024-06-14 13:53:17,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510060558] [2024-06-14 13:53:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510060558] [2024-06-14 13:53:18,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510060558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:18,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001011487] [2024-06-14 13:53:18,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:18,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:18,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:18,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:18,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 270 transitions, 2892 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:18,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,726 INFO L124 PetriNetUnfolderBase]: 1584/2673 cut-off events. [2024-06-14 13:53:18,726 INFO L125 PetriNetUnfolderBase]: For 94702/94708 co-relation queries the response was YES. [2024-06-14 13:53:18,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16329 conditions, 2673 events. 1584/2673 cut-off events. For 94702/94708 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15565 event pairs, 338 based on Foata normal form. 7/2680 useless extension candidates. Maximal degree in co-relation 16222. Up to 2296 conditions per place. [2024-06-14 13:53:18,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 73 changer transitions 0/305 dead transitions. [2024-06-14 13:53:18,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 305 transitions, 3769 flow [2024-06-14 13:53:18,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-14 13:53:18,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-14 13:53:18,754 INFO L175 Difference]: Start difference. First operand has 233 places, 270 transitions, 2892 flow. Second operand 11 states and 233 transitions. [2024-06-14 13:53:18,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 305 transitions, 3769 flow [2024-06-14 13:53:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 305 transitions, 3694 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:19,028 INFO L231 Difference]: Finished difference. Result has 237 places, 276 transitions, 3083 flow [2024-06-14 13:53:19,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3083, PETRI_PLACES=237, PETRI_TRANSITIONS=276} [2024-06-14 13:53:19,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:53:19,029 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 276 transitions, 3083 flow [2024-06-14 13:53:19,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,029 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] [2024-06-14 13:53:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:53:19,030 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1397607000, now seen corresponding path program 5 times [2024-06-14 13:53:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537907372] [2024-06-14 13:53:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537907372] [2024-06-14 13:53:19,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537907372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:19,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585714842] [2024-06-14 13:53:19,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:19,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:19,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:19,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:19,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 276 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:19,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,910 INFO L124 PetriNetUnfolderBase]: 1581/2672 cut-off events. [2024-06-14 13:53:19,910 INFO L125 PetriNetUnfolderBase]: For 98333/98343 co-relation queries the response was YES. [2024-06-14 13:53:19,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16560 conditions, 2672 events. 1581/2672 cut-off events. For 98333/98343 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15637 event pairs, 353 based on Foata normal form. 11/2683 useless extension candidates. Maximal degree in co-relation 16452. Up to 2350 conditions per place. [2024-06-14 13:53:19,937 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 244 selfloop transitions, 38 changer transitions 0/288 dead transitions. [2024-06-14 13:53:19,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 288 transitions, 3677 flow [2024-06-14 13:53:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 13:53:19,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-14 13:53:19,939 INFO L175 Difference]: Start difference. First operand has 237 places, 276 transitions, 3083 flow. Second operand 5 states and 117 transitions. [2024-06-14 13:53:19,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 288 transitions, 3677 flow [2024-06-14 13:53:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 288 transitions, 3475 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:20,265 INFO L231 Difference]: Finished difference. Result has 233 places, 276 transitions, 2971 flow [2024-06-14 13:53:20,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2971, PETRI_PLACES=233, PETRI_TRANSITIONS=276} [2024-06-14 13:53:20,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-14 13:53:20,265 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 276 transitions, 2971 flow [2024-06-14 13:53:20,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,266 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] [2024-06-14 13:53:20,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:53:20,266 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1397191290, now seen corresponding path program 6 times [2024-06-14 13:53:20,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838291672] [2024-06-14 13:53:20,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838291672] [2024-06-14 13:53:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838291672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:20,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755545446] [2024-06-14 13:53:20,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:20,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:20,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 276 transitions, 2971 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:20,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,134 INFO L124 PetriNetUnfolderBase]: 1586/2678 cut-off events. [2024-06-14 13:53:21,135 INFO L125 PetriNetUnfolderBase]: For 99782/99784 co-relation queries the response was YES. [2024-06-14 13:53:21,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16403 conditions, 2678 events. 1586/2678 cut-off events. For 99782/99784 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15629 event pairs, 338 based on Foata normal form. 3/2681 useless extension candidates. Maximal degree in co-relation 16295. Up to 2318 conditions per place. [2024-06-14 13:53:21,162 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-14 13:53:21,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 301 transitions, 3772 flow [2024-06-14 13:53:21,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:53:21,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:53:21,164 INFO L175 Difference]: Start difference. First operand has 233 places, 276 transitions, 2971 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:53:21,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 301 transitions, 3772 flow [2024-06-14 13:53:21,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 301 transitions, 3676 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:21,606 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3059 flow [2024-06-14 13:53:21,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2877, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3059, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-14 13:53:21,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:53:21,607 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3059 flow [2024-06-14 13:53:21,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,609 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] [2024-06-14 13:53:21,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:53:21,609 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:21,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066060, now seen corresponding path program 7 times [2024-06-14 13:53:21,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732450979] [2024-06-14 13:53:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732450979] [2024-06-14 13:53:22,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732450979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:22,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117151316] [2024-06-14 13:53:22,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:22,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:22,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:22,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3059 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:22,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,551 INFO L124 PetriNetUnfolderBase]: 1591/2685 cut-off events. [2024-06-14 13:53:22,552 INFO L125 PetriNetUnfolderBase]: For 100040/100042 co-relation queries the response was YES. [2024-06-14 13:53:22,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16523 conditions, 2685 events. 1591/2685 cut-off events. For 100040/100042 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15673 event pairs, 336 based on Foata normal form. 3/2688 useless extension candidates. Maximal degree in co-relation 16415. Up to 2324 conditions per place. [2024-06-14 13:53:22,577 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 232 selfloop transitions, 70 changer transitions 0/308 dead transitions. [2024-06-14 13:53:22,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 308 transitions, 3888 flow [2024-06-14 13:53:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:22,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 13:53:22,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 13:53:22,578 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3059 flow. Second operand 11 states and 230 transitions. [2024-06-14 13:53:22,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 308 transitions, 3888 flow [2024-06-14 13:53:22,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 308 transitions, 3756 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:22,874 INFO L231 Difference]: Finished difference. Result has 242 places, 282 transitions, 3131 flow [2024-06-14 13:53:22,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3131, PETRI_PLACES=242, PETRI_TRANSITIONS=282} [2024-06-14 13:53:22,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 13:53:22,875 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 282 transitions, 3131 flow [2024-06-14 13:53:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:22,875 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] [2024-06-14 13:53:22,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:53:22,876 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:22,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066246, now seen corresponding path program 10 times [2024-06-14 13:53:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:22,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679400470] [2024-06-14 13:53:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:22,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679400470] [2024-06-14 13:53:23,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679400470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:23,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888944747] [2024-06-14 13:53:23,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:23,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:23,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 282 transitions, 3131 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:23,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:23,751 INFO L124 PetriNetUnfolderBase]: 1658/2795 cut-off events. [2024-06-14 13:53:23,751 INFO L125 PetriNetUnfolderBase]: For 104284/104286 co-relation queries the response was YES. [2024-06-14 13:53:23,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17325 conditions, 2795 events. 1658/2795 cut-off events. For 104284/104286 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16419 event pairs, 336 based on Foata normal form. 3/2798 useless extension candidates. Maximal degree in co-relation 17216. Up to 2431 conditions per place. [2024-06-14 13:53:23,777 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 261 selfloop transitions, 67 changer transitions 0/334 dead transitions. [2024-06-14 13:53:23,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 334 transitions, 4249 flow [2024-06-14 13:53:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:23,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:53:23,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:53:23,779 INFO L175 Difference]: Start difference. First operand has 242 places, 282 transitions, 3131 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:53:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 334 transitions, 4249 flow [2024-06-14 13:53:24,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 334 transitions, 3993 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:24,083 INFO L231 Difference]: Finished difference. Result has 244 places, 310 transitions, 3483 flow [2024-06-14 13:53:24,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2900, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=244, PETRI_TRANSITIONS=310} [2024-06-14 13:53:24,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 13:53:24,084 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 310 transitions, 3483 flow [2024-06-14 13:53:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:24,085 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] [2024-06-14 13:53:24,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:53:24,085 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:24,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1391828910, now seen corresponding path program 8 times [2024-06-14 13:53:24,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:24,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929165780] [2024-06-14 13:53:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:24,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929165780] [2024-06-14 13:53:24,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929165780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:24,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246925906] [2024-06-14 13:53:24,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:24,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:24,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:24,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 310 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:24,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,003 INFO L124 PetriNetUnfolderBase]: 1655/2793 cut-off events. [2024-06-14 13:53:25,003 INFO L125 PetriNetUnfolderBase]: For 106891/106893 co-relation queries the response was YES. [2024-06-14 13:53:25,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17500 conditions, 2793 events. 1655/2793 cut-off events. For 106891/106893 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16380 event pairs, 336 based on Foata normal form. 3/2796 useless extension candidates. Maximal degree in co-relation 17388. Up to 2394 conditions per place. [2024-06-14 13:53:25,032 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 251 selfloop transitions, 77 changer transitions 0/334 dead transitions. [2024-06-14 13:53:25,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 334 transitions, 4200 flow [2024-06-14 13:53:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:25,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 13:53:25,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 13:53:25,034 INFO L175 Difference]: Start difference. First operand has 244 places, 310 transitions, 3483 flow. Second operand 10 states and 212 transitions. [2024-06-14 13:53:25,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 334 transitions, 4200 flow [2024-06-14 13:53:25,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 334 transitions, 4061 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:25,272 INFO L231 Difference]: Finished difference. Result has 251 places, 310 transitions, 3504 flow [2024-06-14 13:53:25,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3344, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3504, PETRI_PLACES=251, PETRI_TRANSITIONS=310} [2024-06-14 13:53:25,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-14 13:53:25,273 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 310 transitions, 3504 flow [2024-06-14 13:53:25,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,273 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] [2024-06-14 13:53:25,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:25,274 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1750224682, now seen corresponding path program 11 times [2024-06-14 13:53:25,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104088788] [2024-06-14 13:53:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104088788] [2024-06-14 13:53:25,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104088788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:25,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730298150] [2024-06-14 13:53:25,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:25,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:25,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:25,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:25,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 310 transitions, 3504 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:25,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:26,180 INFO L124 PetriNetUnfolderBase]: 1660/2800 cut-off events. [2024-06-14 13:53:26,180 INFO L125 PetriNetUnfolderBase]: For 110631/110633 co-relation queries the response was YES. [2024-06-14 13:53:26,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17642 conditions, 2800 events. 1660/2800 cut-off events. For 110631/110633 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16442 event pairs, 336 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 17529. Up to 2469 conditions per place. [2024-06-14 13:53:26,209 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 285 selfloop transitions, 42 changer transitions 0/333 dead transitions. [2024-06-14 13:53:26,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 333 transitions, 4269 flow [2024-06-14 13:53:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:26,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:53:26,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:26,212 INFO L175 Difference]: Start difference. First operand has 251 places, 310 transitions, 3504 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:53:26,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 333 transitions, 4269 flow [2024-06-14 13:53:26,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 333 transitions, 4063 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:26,493 INFO L231 Difference]: Finished difference. Result has 250 places, 313 transitions, 3454 flow [2024-06-14 13:53:26,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3454, PETRI_PLACES=250, PETRI_TRANSITIONS=313} [2024-06-14 13:53:26,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 13:53:26,497 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 313 transitions, 3454 flow [2024-06-14 13:53:26,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:26,498 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] [2024-06-14 13:53:26,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:26,498 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:26,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:26,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1204334534, now seen corresponding path program 12 times [2024-06-14 13:53:26,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:26,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910465593] [2024-06-14 13:53:26,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:26,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910465593] [2024-06-14 13:53:26,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910465593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:26,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263866998] [2024-06-14 13:53:26,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:26,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:26,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:26,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 313 transitions, 3454 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,446 INFO L124 PetriNetUnfolderBase]: 1657/2796 cut-off events. [2024-06-14 13:53:27,446 INFO L125 PetriNetUnfolderBase]: For 108949/108951 co-relation queries the response was YES. [2024-06-14 13:53:27,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17464 conditions, 2796 events. 1657/2796 cut-off events. For 108949/108951 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 16421 event pairs, 336 based on Foata normal form. 3/2799 useless extension candidates. Maximal degree in co-relation 17350. Up to 2342 conditions per place. [2024-06-14 13:53:27,471 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 118 changer transitions 0/336 dead transitions. [2024-06-14 13:53:27,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 336 transitions, 4227 flow [2024-06-14 13:53:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:53:27,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:53:27,473 INFO L175 Difference]: Start difference. First operand has 250 places, 313 transitions, 3454 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:53:27,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 336 transitions, 4227 flow [2024-06-14 13:53:27,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 336 transitions, 4077 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:27,744 INFO L231 Difference]: Finished difference. Result has 251 places, 316 transitions, 3614 flow [2024-06-14 13:53:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3304, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3614, PETRI_PLACES=251, PETRI_TRANSITIONS=316} [2024-06-14 13:53:27,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-14 13:53:27,745 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 316 transitions, 3614 flow [2024-06-14 13:53:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,745 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] [2024-06-14 13:53:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:27,745 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1203937796, now seen corresponding path program 2 times [2024-06-14 13:53:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130154461] [2024-06-14 13:53:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130154461] [2024-06-14 13:53:28,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130154461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:28,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070551338] [2024-06-14 13:53:28,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:28,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:28,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:28,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 316 transitions, 3614 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:28,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,650 INFO L124 PetriNetUnfolderBase]: 1677/2831 cut-off events. [2024-06-14 13:53:28,650 INFO L125 PetriNetUnfolderBase]: For 121051/121051 co-relation queries the response was YES. [2024-06-14 13:53:28,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18002 conditions, 2831 events. 1677/2831 cut-off events. For 121051/121051 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16646 event pairs, 329 based on Foata normal form. 6/2837 useless extension candidates. Maximal degree in co-relation 17888. Up to 2466 conditions per place. [2024-06-14 13:53:28,678 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 304 selfloop transitions, 37 changer transitions 0/347 dead transitions. [2024-06-14 13:53:28,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 347 transitions, 4452 flow [2024-06-14 13:53:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:28,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 13:53:28,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 13:53:28,680 INFO L175 Difference]: Start difference. First operand has 251 places, 316 transitions, 3614 flow. Second operand 9 states and 191 transitions. [2024-06-14 13:53:28,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 347 transitions, 4452 flow [2024-06-14 13:53:28,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 347 transitions, 4164 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:28,975 INFO L231 Difference]: Finished difference. Result has 254 places, 319 transitions, 3446 flow [2024-06-14 13:53:28,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3326, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3446, PETRI_PLACES=254, PETRI_TRANSITIONS=319} [2024-06-14 13:53:28,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:53:28,976 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 319 transitions, 3446 flow [2024-06-14 13:53:28,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:28,976 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] [2024-06-14 13:53:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:28,976 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:28,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1763446120, now seen corresponding path program 3 times [2024-06-14 13:53:28,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:28,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413125686] [2024-06-14 13:53:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413125686] [2024-06-14 13:53:29,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413125686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256301505] [2024-06-14 13:53:29,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:29,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:29,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 319 transitions, 3446 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:29,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,945 INFO L124 PetriNetUnfolderBase]: 1664/2812 cut-off events. [2024-06-14 13:53:29,945 INFO L125 PetriNetUnfolderBase]: For 115227/115227 co-relation queries the response was YES. [2024-06-14 13:53:29,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17490 conditions, 2812 events. 1664/2812 cut-off events. For 115227/115227 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16521 event pairs, 320 based on Foata normal form. 6/2818 useless extension candidates. Maximal degree in co-relation 17374. Up to 2283 conditions per place. [2024-06-14 13:53:29,976 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 299 selfloop transitions, 45 changer transitions 0/350 dead transitions. [2024-06-14 13:53:29,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 350 transitions, 4280 flow [2024-06-14 13:53:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 13:53:29,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 13:53:29,982 INFO L175 Difference]: Start difference. First operand has 254 places, 319 transitions, 3446 flow. Second operand 9 states and 191 transitions. [2024-06-14 13:53:29,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 350 transitions, 4280 flow [2024-06-14 13:53:30,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 350 transitions, 4192 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:30,334 INFO L231 Difference]: Finished difference. Result has 258 places, 321 transitions, 3477 flow [2024-06-14 13:53:30,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3477, PETRI_PLACES=258, PETRI_TRANSITIONS=321} [2024-06-14 13:53:30,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 13:53:30,335 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 321 transitions, 3477 flow [2024-06-14 13:53:30,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,335 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] [2024-06-14 13:53:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:30,336 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:30,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1758104902, now seen corresponding path program 1 times [2024-06-14 13:53:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985076030] [2024-06-14 13:53:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985076030] [2024-06-14 13:53:30,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985076030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530888739] [2024-06-14 13:53:30,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:30,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:30,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 321 transitions, 3477 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:30,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,160 INFO L124 PetriNetUnfolderBase]: 1717/2899 cut-off events. [2024-06-14 13:53:31,161 INFO L125 PetriNetUnfolderBase]: For 128715/128717 co-relation queries the response was YES. [2024-06-14 13:53:31,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 2899 events. 1717/2899 cut-off events. For 128715/128717 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17155 event pairs, 348 based on Foata normal form. 8/2907 useless extension candidates. Maximal degree in co-relation 18133. Up to 2480 conditions per place. [2024-06-14 13:53:31,190 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 320 selfloop transitions, 29 changer transitions 0/355 dead transitions. [2024-06-14 13:53:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 355 transitions, 4443 flow [2024-06-14 13:53:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:31,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:53:31,191 INFO L175 Difference]: Start difference. First operand has 258 places, 321 transitions, 3477 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:31,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 355 transitions, 4443 flow [2024-06-14 13:53:31,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 355 transitions, 4288 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:31,514 INFO L231 Difference]: Finished difference. Result has 259 places, 326 transitions, 3435 flow [2024-06-14 13:53:31,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3435, PETRI_PLACES=259, PETRI_TRANSITIONS=326} [2024-06-14 13:53:31,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 13:53:31,514 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 326 transitions, 3435 flow [2024-06-14 13:53:31,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,515 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] [2024-06-14 13:53:31,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:31,515 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,515 INFO L85 PathProgramCache]: Analyzing trace with hash -497400760, now seen corresponding path program 2 times [2024-06-14 13:53:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264528465] [2024-06-14 13:53:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:31,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:31,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264528465] [2024-06-14 13:53:31,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264528465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:31,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:31,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:31,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380205238] [2024-06-14 13:53:31,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:31,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:31,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:31,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:31,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:31,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:31,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 326 transitions, 3435 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:31,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,400 INFO L124 PetriNetUnfolderBase]: 1783/3006 cut-off events. [2024-06-14 13:53:32,400 INFO L125 PetriNetUnfolderBase]: For 146243/146245 co-relation queries the response was YES. [2024-06-14 13:53:32,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18981 conditions, 3006 events. 1783/3006 cut-off events. For 146243/146245 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17906 event pairs, 366 based on Foata normal form. 8/3014 useless extension candidates. Maximal degree in co-relation 18862. Up to 2630 conditions per place. [2024-06-14 13:53:32,431 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 318 selfloop transitions, 28 changer transitions 0/352 dead transitions. [2024-06-14 13:53:32,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 352 transitions, 4369 flow [2024-06-14 13:53:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:32,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:53:32,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:53:32,432 INFO L175 Difference]: Start difference. First operand has 259 places, 326 transitions, 3435 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:53:32,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 352 transitions, 4369 flow [2024-06-14 13:53:32,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 352 transitions, 4336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:32,809 INFO L231 Difference]: Finished difference. Result has 265 places, 329 transitions, 3494 flow [2024-06-14 13:53:32,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3494, PETRI_PLACES=265, PETRI_TRANSITIONS=329} [2024-06-14 13:53:32,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 13:53:32,810 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 329 transitions, 3494 flow [2024-06-14 13:53:32,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,810 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] [2024-06-14 13:53:32,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:32,811 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:32,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,811 INFO L85 PathProgramCache]: Analyzing trace with hash -497252890, now seen corresponding path program 3 times [2024-06-14 13:53:32,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686857826] [2024-06-14 13:53:32,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686857826] [2024-06-14 13:53:33,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686857826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:33,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857565356] [2024-06-14 13:53:33,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:33,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:33,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:33,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 329 transitions, 3494 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:33,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,669 INFO L124 PetriNetUnfolderBase]: 1765/2980 cut-off events. [2024-06-14 13:53:33,670 INFO L125 PetriNetUnfolderBase]: For 140935/140937 co-relation queries the response was YES. [2024-06-14 13:53:33,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18628 conditions, 2980 events. 1765/2980 cut-off events. For 140935/140937 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17719 event pairs, 364 based on Foata normal form. 10/2990 useless extension candidates. Maximal degree in co-relation 18506. Up to 2652 conditions per place. [2024-06-14 13:53:33,702 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 316 selfloop transitions, 27 changer transitions 0/349 dead transitions. [2024-06-14 13:53:33,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 349 transitions, 4269 flow [2024-06-14 13:53:33,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:33,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:53:33,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 13:53:33,704 INFO L175 Difference]: Start difference. First operand has 265 places, 329 transitions, 3494 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:53:33,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 349 transitions, 4269 flow [2024-06-14 13:53:34,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 349 transitions, 4234 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:34,165 INFO L231 Difference]: Finished difference. Result has 269 places, 330 transitions, 3532 flow [2024-06-14 13:53:34,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3532, PETRI_PLACES=269, PETRI_TRANSITIONS=330} [2024-06-14 13:53:34,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 13:53:34,166 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 330 transitions, 3532 flow [2024-06-14 13:53:34,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,166 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] [2024-06-14 13:53:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:34,166 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1397182362, now seen corresponding path program 4 times [2024-06-14 13:53:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050040125] [2024-06-14 13:53:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:34,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050040125] [2024-06-14 13:53:34,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050040125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:34,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:34,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:34,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316573881] [2024-06-14 13:53:34,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:34,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:34,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 330 transitions, 3532 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:34,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:34,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:35,099 INFO L124 PetriNetUnfolderBase]: 1793/3028 cut-off events. [2024-06-14 13:53:35,100 INFO L125 PetriNetUnfolderBase]: For 144940/144942 co-relation queries the response was YES. [2024-06-14 13:53:35,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 3028 events. 1793/3028 cut-off events. For 144940/144942 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18127 event pairs, 370 based on Foata normal form. 10/3038 useless extension candidates. Maximal degree in co-relation 18870. Up to 2702 conditions per place. [2024-06-14 13:53:35,133 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 321 selfloop transitions, 22 changer transitions 0/349 dead transitions. [2024-06-14 13:53:35,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 349 transitions, 4304 flow [2024-06-14 13:53:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:53:35,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:35,134 INFO L175 Difference]: Start difference. First operand has 269 places, 330 transitions, 3532 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:53:35,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 349 transitions, 4304 flow [2024-06-14 13:53:35,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 349 transitions, 4253 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:35,561 INFO L231 Difference]: Finished difference. Result has 270 places, 331 transitions, 3543 flow [2024-06-14 13:53:35,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3543, PETRI_PLACES=270, PETRI_TRANSITIONS=331} [2024-06-14 13:53:35,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 13:53:35,561 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 331 transitions, 3543 flow [2024-06-14 13:53:35,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:35,562 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] [2024-06-14 13:53:35,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:35,562 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:35,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:35,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1397330232, now seen corresponding path program 5 times [2024-06-14 13:53:35,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:35,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070747942] [2024-06-14 13:53:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:35,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070747942] [2024-06-14 13:53:35,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070747942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541661914] [2024-06-14 13:53:35,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:36,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:36,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 331 transitions, 3543 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:36,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,493 INFO L124 PetriNetUnfolderBase]: 1813/3055 cut-off events. [2024-06-14 13:53:36,493 INFO L125 PetriNetUnfolderBase]: For 146468/146470 co-relation queries the response was YES. [2024-06-14 13:53:36,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19275 conditions, 3055 events. 1813/3055 cut-off events. For 146468/146470 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18214 event pairs, 360 based on Foata normal form. 8/3063 useless extension candidates. Maximal degree in co-relation 19150. Up to 2636 conditions per place. [2024-06-14 13:53:36,526 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 327 selfloop transitions, 25 changer transitions 0/358 dead transitions. [2024-06-14 13:53:36,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 358 transitions, 4496 flow [2024-06-14 13:53:36,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:36,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:53:36,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:53:36,528 INFO L175 Difference]: Start difference. First operand has 270 places, 331 transitions, 3543 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:53:36,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 358 transitions, 4496 flow [2024-06-14 13:53:36,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 358 transitions, 4451 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:36,970 INFO L231 Difference]: Finished difference. Result has 273 places, 333 transitions, 3582 flow [2024-06-14 13:53:36,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3582, PETRI_PLACES=273, PETRI_TRANSITIONS=333} [2024-06-14 13:53:36,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 13:53:36,971 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 333 transitions, 3582 flow [2024-06-14 13:53:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,971 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] [2024-06-14 13:53:36,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:36,972 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:36,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1391819982, now seen corresponding path program 6 times [2024-06-14 13:53:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782521106] [2024-06-14 13:53:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:37,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782521106] [2024-06-14 13:53:37,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782521106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:37,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:37,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:37,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772165233] [2024-06-14 13:53:37,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:37,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:37,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:37,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:37,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 333 transitions, 3582 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:37,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:37,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,951 INFO L124 PetriNetUnfolderBase]: 1795/3034 cut-off events. [2024-06-14 13:53:37,951 INFO L125 PetriNetUnfolderBase]: For 139885/139887 co-relation queries the response was YES. [2024-06-14 13:53:37,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18811 conditions, 3034 events. 1795/3034 cut-off events. For 139885/139887 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 18153 event pairs, 364 based on Foata normal form. 10/3044 useless extension candidates. Maximal degree in co-relation 18684. Up to 2708 conditions per place. [2024-06-14 13:53:37,983 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 324 selfloop transitions, 24 changer transitions 0/354 dead transitions. [2024-06-14 13:53:37,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 354 transitions, 4373 flow [2024-06-14 13:53:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:37,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-14 13:53:37,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:37,985 INFO L175 Difference]: Start difference. First operand has 273 places, 333 transitions, 3582 flow. Second operand 8 states and 168 transitions. [2024-06-14 13:53:37,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 354 transitions, 4373 flow [2024-06-14 13:53:38,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 354 transitions, 4282 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:38,460 INFO L231 Difference]: Finished difference. Result has 276 places, 334 transitions, 3562 flow [2024-06-14 13:53:38,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3562, PETRI_PLACES=276, PETRI_TRANSITIONS=334} [2024-06-14 13:53:38,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 13:53:38,461 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 334 transitions, 3562 flow [2024-06-14 13:53:38,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,462 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] [2024-06-14 13:53:38,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:38,462 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1391604780, now seen corresponding path program 1 times [2024-06-14 13:53:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60515091] [2024-06-14 13:53:38,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60515091] [2024-06-14 13:53:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60515091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:38,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705085469] [2024-06-14 13:53:38,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:38,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:38,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:38,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:38,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 334 transitions, 3562 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:38,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,425 INFO L124 PetriNetUnfolderBase]: 1782/3007 cut-off events. [2024-06-14 13:53:39,426 INFO L125 PetriNetUnfolderBase]: For 127075/127077 co-relation queries the response was YES. [2024-06-14 13:53:39,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18215 conditions, 3007 events. 1782/3007 cut-off events. For 127075/127077 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 17920 event pairs, 341 based on Foata normal form. 8/3015 useless extension candidates. Maximal degree in co-relation 18088. Up to 2617 conditions per place. [2024-06-14 13:53:39,455 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 323 selfloop transitions, 29 changer transitions 0/358 dead transitions. [2024-06-14 13:53:39,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 358 transitions, 4371 flow [2024-06-14 13:53:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 13:53:39,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 13:53:39,457 INFO L175 Difference]: Start difference. First operand has 276 places, 334 transitions, 3562 flow. Second operand 8 states and 171 transitions. [2024-06-14 13:53:39,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 358 transitions, 4371 flow [2024-06-14 13:53:39,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 358 transitions, 4324 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:39,990 INFO L231 Difference]: Finished difference. Result has 278 places, 334 transitions, 3577 flow [2024-06-14 13:53:39,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3577, PETRI_PLACES=278, PETRI_TRANSITIONS=334} [2024-06-14 13:53:39,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 13:53:39,991 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 334 transitions, 3577 flow [2024-06-14 13:53:39,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:39,992 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, 1] [2024-06-14 13:53:39,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:39,992 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:39,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:39,992 INFO L85 PathProgramCache]: Analyzing trace with hash 262612092, now seen corresponding path program 1 times [2024-06-14 13:53:39,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:39,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489180955] [2024-06-14 13:53:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:39,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489180955] [2024-06-14 13:53:40,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489180955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:40,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420132990] [2024-06-14 13:53:40,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:40,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:40,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:40,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:40,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 334 transitions, 3577 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:40,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,973 INFO L124 PetriNetUnfolderBase]: 1803/3045 cut-off events. [2024-06-14 13:53:40,973 INFO L125 PetriNetUnfolderBase]: For 125842/125850 co-relation queries the response was YES. [2024-06-14 13:53:41,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18694 conditions, 3045 events. 1803/3045 cut-off events. For 125842/125850 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 18267 event pairs, 397 based on Foata normal form. 9/3053 useless extension candidates. Maximal degree in co-relation 18566. Up to 2389 conditions per place. [2024-06-14 13:53:41,010 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 172 changer transitions 0/373 dead transitions. [2024-06-14 13:53:41,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 373 transitions, 4801 flow [2024-06-14 13:53:41,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:41,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-14 13:53:41,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 13:53:41,012 INFO L175 Difference]: Start difference. First operand has 278 places, 334 transitions, 3577 flow. Second operand 12 states and 255 transitions. [2024-06-14 13:53:41,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 373 transitions, 4801 flow [2024-06-14 13:53:41,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 373 transitions, 4720 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:41,505 INFO L231 Difference]: Finished difference. Result has 283 places, 343 transitions, 4014 flow [2024-06-14 13:53:41,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3496, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4014, PETRI_PLACES=283, PETRI_TRANSITIONS=343} [2024-06-14 13:53:41,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:53:41,505 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 343 transitions, 4014 flow [2024-06-14 13:53:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:41,506 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, 1] [2024-06-14 13:53:41,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:41,506 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:41,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash -269129074, now seen corresponding path program 2 times [2024-06-14 13:53:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902492764] [2024-06-14 13:53:41,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:41,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:41,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:41,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902492764] [2024-06-14 13:53:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902492764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:41,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468277310] [2024-06-14 13:53:41,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:41,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:41,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:41,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 343 transitions, 4014 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:41,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:42,541 INFO L124 PetriNetUnfolderBase]: 1816/3068 cut-off events. [2024-06-14 13:53:42,541 INFO L125 PetriNetUnfolderBase]: For 134580/134590 co-relation queries the response was YES. [2024-06-14 13:53:42,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19437 conditions, 3068 events. 1816/3068 cut-off events. For 134580/134590 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18480 event pairs, 380 based on Foata normal form. 11/3079 useless extension candidates. Maximal degree in co-relation 19309. Up to 2603 conditions per place. [2024-06-14 13:53:42,575 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 118 changer transitions 0/375 dead transitions. [2024-06-14 13:53:42,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 375 transitions, 5064 flow [2024-06-14 13:53:42,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:53:42,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-14 13:53:42,576 INFO L175 Difference]: Start difference. First operand has 283 places, 343 transitions, 4014 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:53:42,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 375 transitions, 5064 flow [2024-06-14 13:53:43,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 4731 flow, removed 79 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:43,174 INFO L231 Difference]: Finished difference. Result has 288 places, 349 transitions, 4051 flow [2024-06-14 13:53:43,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3739, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4051, PETRI_PLACES=288, PETRI_TRANSITIONS=349} [2024-06-14 13:53:43,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 13:53:43,175 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 349 transitions, 4051 flow [2024-06-14 13:53:43,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:43,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,175 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, 1] [2024-06-14 13:53:43,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:53:43,175 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1332095526, now seen corresponding path program 3 times [2024-06-14 13:53:43,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097401898] [2024-06-14 13:53:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097401898] [2024-06-14 13:53:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097401898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:43,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:43,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183017353] [2024-06-14 13:53:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:43,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:43,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:43,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:43,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 349 transitions, 4051 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:43,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:43,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:43,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:44,130 INFO L124 PetriNetUnfolderBase]: 1813/3064 cut-off events. [2024-06-14 13:53:44,130 INFO L125 PetriNetUnfolderBase]: For 131666/131676 co-relation queries the response was YES. [2024-06-14 13:53:44,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19348 conditions, 3064 events. 1813/3064 cut-off events. For 131666/131676 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18417 event pairs, 380 based on Foata normal form. 11/3075 useless extension candidates. Maximal degree in co-relation 19218. Up to 2600 conditions per place. [2024-06-14 13:53:44,164 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 118 changer transitions 0/375 dead transitions. [2024-06-14 13:53:44,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 375 transitions, 4851 flow [2024-06-14 13:53:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:44,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:44,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-14 13:53:44,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-14 13:53:44,165 INFO L175 Difference]: Start difference. First operand has 288 places, 349 transitions, 4051 flow. Second operand 13 states and 262 transitions. [2024-06-14 13:53:44,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 375 transitions, 4851 flow [2024-06-14 13:53:44,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 375 transitions, 4675 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:44,744 INFO L231 Difference]: Finished difference. Result has 293 places, 349 transitions, 4117 flow [2024-06-14 13:53:44,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4117, PETRI_PLACES=293, PETRI_TRANSITIONS=349} [2024-06-14 13:53:44,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-14 13:53:44,745 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 349 transitions, 4117 flow [2024-06-14 13:53:44,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:44,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:44,745 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, 1] [2024-06-14 13:53:44,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:53:44,745 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:44,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash 934337980, now seen corresponding path program 4 times [2024-06-14 13:53:44,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:44,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979467441] [2024-06-14 13:53:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:45,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:45,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979467441] [2024-06-14 13:53:45,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979467441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:45,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:45,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:45,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476386637] [2024-06-14 13:53:45,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:45,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:45,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:45,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:45,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:45,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 349 transitions, 4117 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:45,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:45,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,734 INFO L124 PetriNetUnfolderBase]: 1834/3099 cut-off events. [2024-06-14 13:53:45,734 INFO L125 PetriNetUnfolderBase]: For 139573/139583 co-relation queries the response was YES. [2024-06-14 13:53:45,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19909 conditions, 3099 events. 1834/3099 cut-off events. For 139573/139583 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18678 event pairs, 380 based on Foata normal form. 11/3110 useless extension candidates. Maximal degree in co-relation 19777. Up to 2604 conditions per place. [2024-06-14 13:53:45,770 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 130 changer transitions 0/381 dead transitions. [2024-06-14 13:53:45,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 381 transitions, 5169 flow [2024-06-14 13:53:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:53:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:53:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 13:53:45,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 13:53:45,776 INFO L175 Difference]: Start difference. First operand has 293 places, 349 transitions, 4117 flow. Second operand 12 states and 244 transitions. [2024-06-14 13:53:45,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 381 transitions, 5169 flow [2024-06-14 13:53:46,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 381 transitions, 4929 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:53:46,452 INFO L231 Difference]: Finished difference. Result has 294 places, 358 transitions, 4290 flow [2024-06-14 13:53:46,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3877, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4290, PETRI_PLACES=294, PETRI_TRANSITIONS=358} [2024-06-14 13:53:46,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 13:53:46,453 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 358 transitions, 4290 flow [2024-06-14 13:53:46,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:46,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:46,453 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, 1] [2024-06-14 13:53:46,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:53:46,453 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:46,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash 926986330, now seen corresponding path program 5 times [2024-06-14 13:53:46,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:46,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858806476] [2024-06-14 13:53:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:46,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:46,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858806476] [2024-06-14 13:53:46,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858806476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:46,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:46,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446631778] [2024-06-14 13:53:46,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:46,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:46,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:46,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 358 transitions, 4290 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:46,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:46,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:46,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:47,513 INFO L124 PetriNetUnfolderBase]: 1839/3108 cut-off events. [2024-06-14 13:53:47,513 INFO L125 PetriNetUnfolderBase]: For 143541/143551 co-relation queries the response was YES. [2024-06-14 13:53:47,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20107 conditions, 3108 events. 1839/3108 cut-off events. For 143541/143551 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18750 event pairs, 380 based on Foata normal form. 11/3119 useless extension candidates. Maximal degree in co-relation 19973. Up to 2610 conditions per place. [2024-06-14 13:53:47,549 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 132 changer transitions 0/388 dead transitions. [2024-06-14 13:53:47,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 388 transitions, 5431 flow [2024-06-14 13:53:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:53:47,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:53:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 13:53:47,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 13:53:47,550 INFO L175 Difference]: Start difference. First operand has 294 places, 358 transitions, 4290 flow. Second operand 15 states and 298 transitions. [2024-06-14 13:53:47,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 388 transitions, 5431 flow [2024-06-14 13:53:48,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 388 transitions, 5248 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:48,363 INFO L231 Difference]: Finished difference. Result has 301 places, 361 transitions, 4424 flow [2024-06-14 13:53:48,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4424, PETRI_PLACES=301, PETRI_TRANSITIONS=361} [2024-06-14 13:53:48,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 13:53:48,363 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 361 transitions, 4424 flow [2024-06-14 13:53:48,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:48,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:48,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:48,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:53:48,364 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:48,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 926980750, now seen corresponding path program 6 times [2024-06-14 13:53:48,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:48,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484126321] [2024-06-14 13:53:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:48,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484126321] [2024-06-14 13:53:48,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484126321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954319244] [2024-06-14 13:53:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:48,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:48,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 361 transitions, 4424 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:48,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:48,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,347 INFO L124 PetriNetUnfolderBase]: 1836/3104 cut-off events. [2024-06-14 13:53:49,347 INFO L125 PetriNetUnfolderBase]: For 144826/144836 co-relation queries the response was YES. [2024-06-14 13:53:49,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20267 conditions, 3104 events. 1836/3104 cut-off events. For 144826/144836 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18710 event pairs, 380 based on Foata normal form. 11/3115 useless extension candidates. Maximal degree in co-relation 20131. Up to 2607 conditions per place. [2024-06-14 13:53:49,382 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 247 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2024-06-14 13:53:49,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 385 transitions, 5374 flow [2024-06-14 13:53:49,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-14 13:53:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-14 13:53:49,384 INFO L175 Difference]: Start difference. First operand has 301 places, 361 transitions, 4424 flow. Second operand 13 states and 263 transitions. [2024-06-14 13:53:49,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 385 transitions, 5374 flow [2024-06-14 13:53:50,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 385 transitions, 4997 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-14 13:53:50,034 INFO L231 Difference]: Finished difference. Result has 302 places, 361 transitions, 4317 flow [2024-06-14 13:53:50,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4317, PETRI_PLACES=302, PETRI_TRANSITIONS=361} [2024-06-14 13:53:50,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 13:53:50,035 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 361 transitions, 4317 flow [2024-06-14 13:53:50,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:50,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,035 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, 1] [2024-06-14 13:53:50,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:53:50,035 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:50,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,036 INFO L85 PathProgramCache]: Analyzing trace with hash -539982714, now seen corresponding path program 7 times [2024-06-14 13:53:50,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578986736] [2024-06-14 13:53:50,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:50,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:50,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578986736] [2024-06-14 13:53:50,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578986736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:50,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:50,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:50,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453487470] [2024-06-14 13:53:50,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:50,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:50,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:50,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:50,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:50,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:50,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 361 transitions, 4317 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:50,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:50,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:50,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:51,078 INFO L124 PetriNetUnfolderBase]: 1849/3126 cut-off events. [2024-06-14 13:53:51,078 INFO L125 PetriNetUnfolderBase]: For 151118/151128 co-relation queries the response was YES. [2024-06-14 13:53:51,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20293 conditions, 3126 events. 1849/3126 cut-off events. For 151118/151128 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18886 event pairs, 380 based on Foata normal form. 11/3137 useless extension candidates. Maximal degree in co-relation 20157. Up to 2528 conditions per place. [2024-06-14 13:53:51,116 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 142 changer transitions 0/399 dead transitions. [2024-06-14 13:53:51,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 399 transitions, 5549 flow [2024-06-14 13:53:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 13:53:51,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:53:51,134 INFO L175 Difference]: Start difference. First operand has 302 places, 361 transitions, 4317 flow. Second operand 11 states and 242 transitions. [2024-06-14 13:53:51,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 399 transitions, 5549 flow [2024-06-14 13:53:51,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 399 transitions, 5285 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:53:51,955 INFO L231 Difference]: Finished difference. Result has 301 places, 367 transitions, 4435 flow [2024-06-14 13:53:51,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4435, PETRI_PLACES=301, PETRI_TRANSITIONS=367} [2024-06-14 13:53:51,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 13:53:51,959 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 367 transitions, 4435 flow [2024-06-14 13:53:51,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:51,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:51,960 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, 1] [2024-06-14 13:53:51,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:53:51,960 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:51,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash -706216494, now seen corresponding path program 8 times [2024-06-14 13:53:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:51,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134499530] [2024-06-14 13:53:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134499530] [2024-06-14 13:53:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134499530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031678385] [2024-06-14 13:53:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:52,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:52,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 367 transitions, 4435 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:52,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,998 INFO L124 PetriNetUnfolderBase]: 1854/3134 cut-off events. [2024-06-14 13:53:52,998 INFO L125 PetriNetUnfolderBase]: For 155591/155599 co-relation queries the response was YES. [2024-06-14 13:53:53,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20464 conditions, 3134 events. 1854/3134 cut-off events. For 155591/155599 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18938 event pairs, 397 based on Foata normal form. 9/3142 useless extension candidates. Maximal degree in co-relation 20327. Up to 2534 conditions per place. [2024-06-14 13:53:53,037 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 136 changer transitions 0/393 dead transitions. [2024-06-14 13:53:53,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 393 transitions, 5597 flow [2024-06-14 13:53:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:53:53,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:53:53,039 INFO L175 Difference]: Start difference. First operand has 301 places, 367 transitions, 4435 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:53:53,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 393 transitions, 5597 flow [2024-06-14 13:53:53,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 393 transitions, 5295 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:53,771 INFO L231 Difference]: Finished difference. Result has 302 places, 370 transitions, 4463 flow [2024-06-14 13:53:53,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4144, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4463, PETRI_PLACES=302, PETRI_TRANSITIONS=370} [2024-06-14 13:53:53,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 13:53:53,771 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 370 transitions, 4463 flow [2024-06-14 13:53:53,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:53,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,772 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, 1] [2024-06-14 13:53:53,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:53:53,772 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash -702497424, now seen corresponding path program 9 times [2024-06-14 13:53:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131571245] [2024-06-14 13:53:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:54,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131571245] [2024-06-14 13:53:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131571245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:54,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316594469] [2024-06-14 13:53:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:54,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:54,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:54,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:54,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 370 transitions, 4463 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:54,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:54,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:54,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,827 INFO L124 PetriNetUnfolderBase]: 1859/3144 cut-off events. [2024-06-14 13:53:54,828 INFO L125 PetriNetUnfolderBase]: For 159269/159279 co-relation queries the response was YES. [2024-06-14 13:53:54,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20541 conditions, 3144 events. 1859/3144 cut-off events. For 159269/159279 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 19014 event pairs, 380 based on Foata normal form. 11/3155 useless extension candidates. Maximal degree in co-relation 20403. Up to 2695 conditions per place. [2024-06-14 13:53:54,864 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 302 selfloop transitions, 84 changer transitions 0/392 dead transitions. [2024-06-14 13:53:54,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 5476 flow [2024-06-14 13:53:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:53:54,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:53:54,865 INFO L175 Difference]: Start difference. First operand has 302 places, 370 transitions, 4463 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:53:54,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 5476 flow [2024-06-14 13:53:55,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 392 transitions, 5172 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:55,777 INFO L231 Difference]: Finished difference. Result has 304 places, 373 transitions, 4386 flow [2024-06-14 13:53:55,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4386, PETRI_PLACES=304, PETRI_TRANSITIONS=373} [2024-06-14 13:53:55,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 13:53:55,777 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 373 transitions, 4386 flow [2024-06-14 13:53:55,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:55,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,778 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, 1] [2024-06-14 13:53:55,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:53:55,778 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:55,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1286961702, now seen corresponding path program 10 times [2024-06-14 13:53:55,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130062751] [2024-06-14 13:53:55,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:56,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:56,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130062751] [2024-06-14 13:53:56,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130062751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:56,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:56,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:56,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048752992] [2024-06-14 13:53:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:56,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:56,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:56,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 373 transitions, 4386 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:56,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:56,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:56,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,810 INFO L124 PetriNetUnfolderBase]: 1856/3140 cut-off events. [2024-06-14 13:53:56,810 INFO L125 PetriNetUnfolderBase]: For 160022/160032 co-relation queries the response was YES. [2024-06-14 13:53:56,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20345 conditions, 3140 events. 1856/3140 cut-off events. For 160022/160032 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 18949 event pairs, 380 based on Foata normal form. 11/3151 useless extension candidates. Maximal degree in co-relation 20206. Up to 2692 conditions per place. [2024-06-14 13:53:56,850 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 87 changer transitions 0/393 dead transitions. [2024-06-14 13:53:56,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 393 transitions, 5208 flow [2024-06-14 13:53:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 13:53:56,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 13:53:56,852 INFO L175 Difference]: Start difference. First operand has 304 places, 373 transitions, 4386 flow. Second operand 10 states and 209 transitions. [2024-06-14 13:53:56,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 393 transitions, 5208 flow [2024-06-14 13:53:57,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 393 transitions, 4992 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:57,793 INFO L231 Difference]: Finished difference. Result has 308 places, 373 transitions, 4351 flow [2024-06-14 13:53:57,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4351, PETRI_PLACES=308, PETRI_TRANSITIONS=373} [2024-06-14 13:53:57,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:53:57,793 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 373 transitions, 4351 flow [2024-06-14 13:53:57,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:57,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:57,794 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, 1] [2024-06-14 13:53:57,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:53:57,794 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:57,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:57,794 INFO L85 PathProgramCache]: Analyzing trace with hash -530717124, now seen corresponding path program 11 times [2024-06-14 13:53:57,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:57,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277044347] [2024-06-14 13:53:57,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277044347] [2024-06-14 13:53:58,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277044347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:58,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780209750] [2024-06-14 13:53:58,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:58,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:58,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:58,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 373 transitions, 4351 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:58,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:58,850 INFO L124 PetriNetUnfolderBase]: 1869/3162 cut-off events. [2024-06-14 13:53:58,851 INFO L125 PetriNetUnfolderBase]: For 166492/166502 co-relation queries the response was YES. [2024-06-14 13:53:58,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20548 conditions, 3162 events. 1869/3162 cut-off events. For 166492/166502 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19146 event pairs, 380 based on Foata normal form. 11/3173 useless extension candidates. Maximal degree in co-relation 20408. Up to 2552 conditions per place. [2024-06-14 13:53:58,889 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 160 changer transitions 0/410 dead transitions. [2024-06-14 13:53:58,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 410 transitions, 5595 flow [2024-06-14 13:53:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-14 13:53:58,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:58,890 INFO L175 Difference]: Start difference. First operand has 308 places, 373 transitions, 4351 flow. Second operand 13 states and 273 transitions. [2024-06-14 13:53:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 410 transitions, 5595 flow [2024-06-14 13:53:59,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 410 transitions, 5391 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:59,854 INFO L231 Difference]: Finished difference. Result has 311 places, 379 transitions, 4543 flow [2024-06-14 13:53:59,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4147, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4543, PETRI_PLACES=311, PETRI_TRANSITIONS=379} [2024-06-14 13:53:59,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 13:53:59,854 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 379 transitions, 4543 flow [2024-06-14 13:53:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:53:59,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:59,855 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, 1] [2024-06-14 13:53:59,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:53:59,855 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:59,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:59,855 INFO L85 PathProgramCache]: Analyzing trace with hash -530728284, now seen corresponding path program 12 times [2024-06-14 13:53:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875874699] [2024-06-14 13:53:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:00,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:00,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875874699] [2024-06-14 13:54:00,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875874699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:00,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:00,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:00,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929473526] [2024-06-14 13:54:00,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:00,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:00,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:00,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:00,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:00,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:00,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 379 transitions, 4543 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:00,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:00,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:00,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:00,870 INFO L124 PetriNetUnfolderBase]: 1866/3158 cut-off events. [2024-06-14 13:54:00,871 INFO L125 PetriNetUnfolderBase]: For 168278/168288 co-relation queries the response was YES. [2024-06-14 13:54:00,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20674 conditions, 3158 events. 1866/3158 cut-off events. For 168278/168288 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19156 event pairs, 380 based on Foata normal form. 11/3169 useless extension candidates. Maximal degree in co-relation 20533. Up to 2549 conditions per place. [2024-06-14 13:54:00,908 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 245 selfloop transitions, 158 changer transitions 0/409 dead transitions. [2024-06-14 13:54:00,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 409 transitions, 5569 flow [2024-06-14 13:54:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-14 13:54:00,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-14 13:54:00,909 INFO L175 Difference]: Start difference. First operand has 311 places, 379 transitions, 4543 flow. Second operand 13 states and 274 transitions. [2024-06-14 13:54:00,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 409 transitions, 5569 flow [2024-06-14 13:54:01,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 409 transitions, 5268 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:01,734 INFO L231 Difference]: Finished difference. Result has 315 places, 379 transitions, 4564 flow [2024-06-14 13:54:01,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4564, PETRI_PLACES=315, PETRI_TRANSITIONS=379} [2024-06-14 13:54:01,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:54:01,734 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 379 transitions, 4564 flow [2024-06-14 13:54:01,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:01,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:01,735 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, 1] [2024-06-14 13:54:01,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:54:01,735 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:01,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1668125764, now seen corresponding path program 13 times [2024-06-14 13:54:01,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:01,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844568629] [2024-06-14 13:54:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:01,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:02,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:02,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:02,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844568629] [2024-06-14 13:54:02,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844568629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:02,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:02,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:02,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672151232] [2024-06-14 13:54:02,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:02,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:02,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:02,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:02,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 379 transitions, 4564 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:02,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:02,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:02,753 INFO L124 PetriNetUnfolderBase]: 1911/3236 cut-off events. [2024-06-14 13:54:02,754 INFO L125 PetriNetUnfolderBase]: For 181694/181704 co-relation queries the response was YES. [2024-06-14 13:54:02,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21418 conditions, 3236 events. 1911/3236 cut-off events. For 181694/181704 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19699 event pairs, 380 based on Foata normal form. 11/3247 useless extension candidates. Maximal degree in co-relation 21276. Up to 2668 conditions per place. [2024-06-14 13:54:02,795 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 129 changer transitions 0/420 dead transitions. [2024-06-14 13:54:02,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 420 transitions, 6009 flow [2024-06-14 13:54:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:54:02,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:54:02,796 INFO L175 Difference]: Start difference. First operand has 315 places, 379 transitions, 4564 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:54:02,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 420 transitions, 6009 flow [2024-06-14 13:54:03,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 420 transitions, 5651 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 13:54:03,787 INFO L231 Difference]: Finished difference. Result has 312 places, 397 transitions, 4808 flow [2024-06-14 13:54:03,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4240, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4808, PETRI_PLACES=312, PETRI_TRANSITIONS=397} [2024-06-14 13:54:03,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 13:54:03,788 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 397 transitions, 4808 flow [2024-06-14 13:54:03,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:03,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:03,788 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, 1] [2024-06-14 13:54:03,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:54:03,789 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:03,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:03,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1668304324, now seen corresponding path program 14 times [2024-06-14 13:54:03,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:03,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840216656] [2024-06-14 13:54:03,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:03,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:04,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:04,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840216656] [2024-06-14 13:54:04,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840216656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:04,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:04,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362033553] [2024-06-14 13:54:04,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:04,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:04,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:04,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:04,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 397 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:04,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:04,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:04,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:04,833 INFO L124 PetriNetUnfolderBase]: 1916/3245 cut-off events. [2024-06-14 13:54:04,834 INFO L125 PetriNetUnfolderBase]: For 186272/186282 co-relation queries the response was YES. [2024-06-14 13:54:04,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21566 conditions, 3245 events. 1916/3245 cut-off events. For 186272/186282 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19745 event pairs, 380 based on Foata normal form. 11/3256 useless extension candidates. Maximal degree in co-relation 21422. Up to 2674 conditions per place. [2024-06-14 13:54:04,877 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 283 selfloop transitions, 139 changer transitions 0/428 dead transitions. [2024-06-14 13:54:04,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 428 transitions, 6077 flow [2024-06-14 13:54:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 13:54:04,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 13:54:04,879 INFO L175 Difference]: Start difference. First operand has 312 places, 397 transitions, 4808 flow. Second operand 10 states and 221 transitions. [2024-06-14 13:54:04,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 428 transitions, 6077 flow [2024-06-14 13:54:05,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 428 transitions, 5973 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:05,996 INFO L231 Difference]: Finished difference. Result has 319 places, 400 transitions, 5047 flow [2024-06-14 13:54:05,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5047, PETRI_PLACES=319, PETRI_TRANSITIONS=400} [2024-06-14 13:54:05,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:54:05,997 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 400 transitions, 5047 flow [2024-06-14 13:54:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:05,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:05,998 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, 1] [2024-06-14 13:54:05,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:54:05,998 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:05,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:05,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1667952784, now seen corresponding path program 15 times [2024-06-14 13:54:05,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:05,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313560543] [2024-06-14 13:54:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:05,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:06,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:06,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313560543] [2024-06-14 13:54:06,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313560543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:06,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:06,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:06,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337771051] [2024-06-14 13:54:06,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:06,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:06,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:06,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:06,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:06,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:06,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 400 transitions, 5047 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:06,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:06,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:06,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:07,123 INFO L124 PetriNetUnfolderBase]: 1913/3241 cut-off events. [2024-06-14 13:54:07,123 INFO L125 PetriNetUnfolderBase]: For 188061/188071 co-relation queries the response was YES. [2024-06-14 13:54:07,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21832 conditions, 3241 events. 1913/3241 cut-off events. For 188061/188071 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19758 event pairs, 380 based on Foata normal form. 11/3252 useless extension candidates. Maximal degree in co-relation 21686. Up to 2671 conditions per place. [2024-06-14 13:54:07,163 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 138 changer transitions 0/425 dead transitions. [2024-06-14 13:54:07,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 425 transitions, 6253 flow [2024-06-14 13:54:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:07,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:54:07,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:54:07,164 INFO L175 Difference]: Start difference. First operand has 319 places, 400 transitions, 5047 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:54:07,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 425 transitions, 6253 flow [2024-06-14 13:54:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 425 transitions, 5976 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:08,173 INFO L231 Difference]: Finished difference. Result has 321 places, 400 transitions, 5056 flow [2024-06-14 13:54:08,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4774, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5056, PETRI_PLACES=321, PETRI_TRANSITIONS=400} [2024-06-14 13:54:08,173 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:54:08,173 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 400 transitions, 5056 flow [2024-06-14 13:54:08,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:08,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:08,174 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, 1] [2024-06-14 13:54:08,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:54:08,174 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:08,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:08,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1668136924, now seen corresponding path program 16 times [2024-06-14 13:54:08,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:08,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64424943] [2024-06-14 13:54:08,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:08,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:08,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:08,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64424943] [2024-06-14 13:54:08,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64424943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:08,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:08,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:08,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573040896] [2024-06-14 13:54:08,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:08,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:08,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:08,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:08,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 400 transitions, 5056 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:08,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:08,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:08,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:09,287 INFO L124 PetriNetUnfolderBase]: 1910/3237 cut-off events. [2024-06-14 13:54:09,288 INFO L125 PetriNetUnfolderBase]: For 185149/185159 co-relation queries the response was YES. [2024-06-14 13:54:09,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21731 conditions, 3237 events. 1910/3237 cut-off events. For 185149/185159 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19751 event pairs, 380 based on Foata normal form. 11/3248 useless extension candidates. Maximal degree in co-relation 21585. Up to 2668 conditions per place. [2024-06-14 13:54:09,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 131 changer transitions 0/425 dead transitions. [2024-06-14 13:54:09,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 425 transitions, 6110 flow [2024-06-14 13:54:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:09,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:54:09,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:54:09,329 INFO L175 Difference]: Start difference. First operand has 321 places, 400 transitions, 5056 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:54:09,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 425 transitions, 6110 flow [2024-06-14 13:54:10,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 425 transitions, 5816 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:10,385 INFO L231 Difference]: Finished difference. Result has 322 places, 400 transitions, 5030 flow [2024-06-14 13:54:10,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4762, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5030, PETRI_PLACES=322, PETRI_TRANSITIONS=400} [2024-06-14 13:54:10,386 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-14 13:54:10,386 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 400 transitions, 5030 flow [2024-06-14 13:54:10,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:10,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:10,386 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, 1] [2024-06-14 13:54:10,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:54:10,387 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:10,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:10,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1667958364, now seen corresponding path program 17 times [2024-06-14 13:54:10,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:10,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596720508] [2024-06-14 13:54:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:10,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:10,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596720508] [2024-06-14 13:54:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596720508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:10,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:10,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846889965] [2024-06-14 13:54:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:10,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:10,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:10,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:10,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 400 transitions, 5030 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:10,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:10,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:10,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:11,505 INFO L124 PetriNetUnfolderBase]: 1907/3233 cut-off events. [2024-06-14 13:54:11,506 INFO L125 PetriNetUnfolderBase]: For 186319/186329 co-relation queries the response was YES. [2024-06-14 13:54:11,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21656 conditions, 3233 events. 1907/3233 cut-off events. For 186319/186329 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19752 event pairs, 380 based on Foata normal form. 11/3244 useless extension candidates. Maximal degree in co-relation 21509. Up to 2665 conditions per place. [2024-06-14 13:54:11,547 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 139 changer transitions 0/425 dead transitions. [2024-06-14 13:54:11,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 425 transitions, 6084 flow [2024-06-14 13:54:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 13:54:11,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-14 13:54:11,549 INFO L175 Difference]: Start difference. First operand has 322 places, 400 transitions, 5030 flow. Second operand 11 states and 234 transitions. [2024-06-14 13:54:11,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 425 transitions, 6084 flow [2024-06-14 13:54:12,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 425 transitions, 5802 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:12,642 INFO L231 Difference]: Finished difference. Result has 328 places, 400 transitions, 5033 flow [2024-06-14 13:54:12,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4748, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5033, PETRI_PLACES=328, PETRI_TRANSITIONS=400} [2024-06-14 13:54:12,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:54:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 400 transitions, 5033 flow [2024-06-14 13:54:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:12,643 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, 1] [2024-06-14 13:54:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:54:12,643 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:12,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309904, now seen corresponding path program 18 times [2024-06-14 13:54:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081229964] [2024-06-14 13:54:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081229964] [2024-06-14 13:54:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081229964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:13,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:13,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562841388] [2024-06-14 13:54:13,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:13,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:13,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:13,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:13,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:13,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 400 transitions, 5033 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:13,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:13,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:13,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:13,739 INFO L124 PetriNetUnfolderBase]: 1904/3229 cut-off events. [2024-06-14 13:54:13,739 INFO L125 PetriNetUnfolderBase]: For 187248/187258 co-relation queries the response was YES. [2024-06-14 13:54:13,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21594 conditions, 3229 events. 1904/3229 cut-off events. For 187248/187258 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19696 event pairs, 380 based on Foata normal form. 11/3240 useless extension candidates. Maximal degree in co-relation 21446. Up to 2662 conditions per place. [2024-06-14 13:54:13,775 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 132 changer transitions 0/428 dead transitions. [2024-06-14 13:54:13,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 428 transitions, 5947 flow [2024-06-14 13:54:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:13,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:13,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 13:54:13,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 13:54:13,777 INFO L175 Difference]: Start difference. First operand has 328 places, 400 transitions, 5033 flow. Second operand 9 states and 206 transitions. [2024-06-14 13:54:13,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 428 transitions, 5947 flow [2024-06-14 13:54:14,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 428 transitions, 5594 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:14,769 INFO L231 Difference]: Finished difference. Result has 326 places, 400 transitions, 4954 flow [2024-06-14 13:54:14,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4954, PETRI_PLACES=326, PETRI_TRANSITIONS=400} [2024-06-14 13:54:14,770 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 13:54:14,770 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 400 transitions, 4954 flow [2024-06-14 13:54:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:14,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:14,770 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, 1] [2024-06-14 13:54:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:54:14,771 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:14,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 494128986, now seen corresponding path program 19 times [2024-06-14 13:54:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:14,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915565091] [2024-06-14 13:54:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:15,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:15,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:15,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915565091] [2024-06-14 13:54:15,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915565091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:15,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:15,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:15,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979700858] [2024-06-14 13:54:15,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:15,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:15,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:15,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 400 transitions, 4954 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:15,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:15,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:15,807 INFO L124 PetriNetUnfolderBase]: 1917/3251 cut-off events. [2024-06-14 13:54:15,808 INFO L125 PetriNetUnfolderBase]: For 194476/194486 co-relation queries the response was YES. [2024-06-14 13:54:15,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21782 conditions, 3251 events. 1917/3251 cut-off events. For 194476/194486 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 19850 event pairs, 380 based on Foata normal form. 11/3262 useless extension candidates. Maximal degree in co-relation 21633. Up to 2598 conditions per place. [2024-06-14 13:54:15,849 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 201 changer transitions 0/444 dead transitions. [2024-06-14 13:54:15,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 444 transitions, 6318 flow [2024-06-14 13:54:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:54:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:54:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-06-14 13:54:15,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174216027874564 [2024-06-14 13:54:15,851 INFO L175 Difference]: Start difference. First operand has 326 places, 400 transitions, 4954 flow. Second operand 14 states and 297 transitions. [2024-06-14 13:54:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 444 transitions, 6318 flow [2024-06-14 13:54:16,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 444 transitions, 6006 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:16,996 INFO L231 Difference]: Finished difference. Result has 330 places, 406 transitions, 5138 flow [2024-06-14 13:54:16,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5138, PETRI_PLACES=330, PETRI_TRANSITIONS=406} [2024-06-14 13:54:16,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 13:54:16,996 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 406 transitions, 5138 flow [2024-06-14 13:54:16,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:16,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:16,997 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, 1] [2024-06-14 13:54:16,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:54:16,997 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:16,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:16,997 INFO L85 PathProgramCache]: Analyzing trace with hash 833948196, now seen corresponding path program 20 times [2024-06-14 13:54:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943692832] [2024-06-14 13:54:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:17,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943692832] [2024-06-14 13:54:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943692832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:17,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:17,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:17,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464126786] [2024-06-14 13:54:17,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:17,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:17,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:17,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:17,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:17,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:17,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 406 transitions, 5138 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:17,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:17,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:17,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:17,939 INFO L124 PetriNetUnfolderBase]: 1922/3258 cut-off events. [2024-06-14 13:54:17,940 INFO L125 PetriNetUnfolderBase]: For 194838/194840 co-relation queries the response was YES. [2024-06-14 13:54:17,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21970 conditions, 3258 events. 1922/3258 cut-off events. For 194838/194840 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19911 event pairs, 408 based on Foata normal form. 3/3260 useless extension candidates. Maximal degree in co-relation 21821. Up to 2604 conditions per place. [2024-06-14 13:54:17,980 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 198 changer transitions 0/427 dead transitions. [2024-06-14 13:54:17,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 427 transitions, 6226 flow [2024-06-14 13:54:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:17,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 13:54:17,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:54:17,981 INFO L175 Difference]: Start difference. First operand has 330 places, 406 transitions, 5138 flow. Second operand 10 states and 210 transitions. [2024-06-14 13:54:17,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 427 transitions, 6226 flow [2024-06-14 13:54:19,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 427 transitions, 5834 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-14 13:54:19,016 INFO L231 Difference]: Finished difference. Result has 328 places, 409 transitions, 5196 flow [2024-06-14 13:54:19,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5196, PETRI_PLACES=328, PETRI_TRANSITIONS=409} [2024-06-14 13:54:19,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:54:19,016 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 409 transitions, 5196 flow [2024-06-14 13:54:19,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:19,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:19,017 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, 1] [2024-06-14 13:54:19,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:54:19,018 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:19,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash 501480636, now seen corresponding path program 21 times [2024-06-14 13:54:19,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:19,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713592846] [2024-06-14 13:54:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:19,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713592846] [2024-06-14 13:54:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713592846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:19,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:19,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156150209] [2024-06-14 13:54:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:19,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:19,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:19,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 409 transitions, 5196 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:19,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:19,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:19,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:20,133 INFO L124 PetriNetUnfolderBase]: 1919/3256 cut-off events. [2024-06-14 13:54:20,134 INFO L125 PetriNetUnfolderBase]: For 187188/187198 co-relation queries the response was YES. [2024-06-14 13:54:20,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21780 conditions, 3256 events. 1919/3256 cut-off events. For 187188/187198 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19901 event pairs, 380 based on Foata normal form. 11/3267 useless extension candidates. Maximal degree in co-relation 21632. Up to 2601 conditions per place. [2024-06-14 13:54:20,168 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 203 changer transitions 0/438 dead transitions. [2024-06-14 13:54:20,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 438 transitions, 6288 flow [2024-06-14 13:54:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 13:54:20,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 13:54:20,169 INFO L175 Difference]: Start difference. First operand has 328 places, 409 transitions, 5196 flow. Second operand 12 states and 254 transitions. [2024-06-14 13:54:20,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 438 transitions, 6288 flow [2024-06-14 13:54:21,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 5921 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:21,330 INFO L231 Difference]: Finished difference. Result has 333 places, 409 transitions, 5245 flow [2024-06-14 13:54:21,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4829, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5245, PETRI_PLACES=333, PETRI_TRANSITIONS=409} [2024-06-14 13:54:21,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:54:21,331 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 409 transitions, 5245 flow [2024-06-14 13:54:21,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:21,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:21,331 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, 1] [2024-06-14 13:54:21,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:54:21,332 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:21,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:21,332 INFO L85 PathProgramCache]: Analyzing trace with hash 494123406, now seen corresponding path program 22 times [2024-06-14 13:54:21,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:21,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565143433] [2024-06-14 13:54:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:21,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:21,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:21,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565143433] [2024-06-14 13:54:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565143433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:21,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:21,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53399145] [2024-06-14 13:54:21,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:21,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:21,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:21,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 409 transitions, 5245 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:21,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:21,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:21,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:22,396 INFO L124 PetriNetUnfolderBase]: 1916/3252 cut-off events. [2024-06-14 13:54:22,396 INFO L125 PetriNetUnfolderBase]: For 188348/188358 co-relation queries the response was YES. [2024-06-14 13:54:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21764 conditions, 3252 events. 1916/3252 cut-off events. For 188348/188358 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19874 event pairs, 380 based on Foata normal form. 11/3263 useless extension candidates. Maximal degree in co-relation 21615. Up to 2598 conditions per place. [2024-06-14 13:54:22,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 204 changer transitions 0/443 dead transitions. [2024-06-14 13:54:22,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 443 transitions, 6203 flow [2024-06-14 13:54:22,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-14 13:54:22,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:54:22,440 INFO L175 Difference]: Start difference. First operand has 333 places, 409 transitions, 5245 flow. Second operand 12 states and 261 transitions. [2024-06-14 13:54:22,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 443 transitions, 6203 flow [2024-06-14 13:54:23,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 443 transitions, 5644 flow, removed 11 selfloop flow, removed 14 redundant places. [2024-06-14 13:54:23,552 INFO L231 Difference]: Finished difference. Result has 331 places, 409 transitions, 5108 flow [2024-06-14 13:54:23,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5108, PETRI_PLACES=331, PETRI_TRANSITIONS=409} [2024-06-14 13:54:23,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-14 13:54:23,553 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 409 transitions, 5108 flow [2024-06-14 13:54:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:23,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:23,555 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, 1] [2024-06-14 13:54:23,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:54:23,555 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:23,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:23,555 INFO L85 PathProgramCache]: Analyzing trace with hash -903926842, now seen corresponding path program 23 times [2024-06-14 13:54:23,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:23,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745098026] [2024-06-14 13:54:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:23,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:23,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:23,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745098026] [2024-06-14 13:54:23,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745098026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:23,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:23,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:23,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910602342] [2024-06-14 13:54:23,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:23,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:23,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:23,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:24,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:24,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 409 transitions, 5108 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:24,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:24,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:24,688 INFO L124 PetriNetUnfolderBase]: 2082/3543 cut-off events. [2024-06-14 13:54:24,689 INFO L125 PetriNetUnfolderBase]: For 192513/192515 co-relation queries the response was YES. [2024-06-14 13:54:24,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23529 conditions, 3543 events. 2082/3543 cut-off events. For 192513/192515 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 22073 event pairs, 358 based on Foata normal form. 3/3546 useless extension candidates. Maximal degree in co-relation 23380. Up to 2871 conditions per place. [2024-06-14 13:54:24,734 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 356 selfloop transitions, 169 changer transitions 0/531 dead transitions. [2024-06-14 13:54:24,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 531 transitions, 7538 flow [2024-06-14 13:54:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 13:54:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 13:54:24,735 INFO L175 Difference]: Start difference. First operand has 331 places, 409 transitions, 5108 flow. Second operand 12 states and 254 transitions. [2024-06-14 13:54:24,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 531 transitions, 7538 flow [2024-06-14 13:54:25,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 531 transitions, 7014 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 13:54:25,804 INFO L231 Difference]: Finished difference. Result has 333 places, 485 transitions, 6129 flow [2024-06-14 13:54:25,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6129, PETRI_PLACES=333, PETRI_TRANSITIONS=485} [2024-06-14 13:54:25,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:54:25,804 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 485 transitions, 6129 flow [2024-06-14 13:54:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:25,805 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, 1] [2024-06-14 13:54:25,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:54:25,805 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:25,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:25,805 INFO L85 PathProgramCache]: Analyzing trace with hash -376154332, now seen corresponding path program 24 times [2024-06-14 13:54:25,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:25,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232385203] [2024-06-14 13:54:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:26,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:26,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232385203] [2024-06-14 13:54:26,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232385203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:26,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:26,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:26,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735641652] [2024-06-14 13:54:26,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:26,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 485 transitions, 6129 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:27,147 INFO L124 PetriNetUnfolderBase]: 2087/3556 cut-off events. [2024-06-14 13:54:27,147 INFO L125 PetriNetUnfolderBase]: For 191922/191932 co-relation queries the response was YES. [2024-06-14 13:54:27,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24023 conditions, 3556 events. 2087/3556 cut-off events. For 191922/191932 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22244 event pairs, 380 based on Foata normal form. 11/3567 useless extension candidates. Maximal degree in co-relation 23872. Up to 2932 conditions per place. [2024-06-14 13:54:27,188 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 121 changer transitions 0/518 dead transitions. [2024-06-14 13:54:27,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 518 transitions, 7438 flow [2024-06-14 13:54:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:54:27,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:54:27,189 INFO L175 Difference]: Start difference. First operand has 333 places, 485 transitions, 6129 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:54:27,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 518 transitions, 7438 flow [2024-06-14 13:54:28,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 518 transitions, 7284 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:28,278 INFO L231 Difference]: Finished difference. Result has 337 places, 488 transitions, 6283 flow [2024-06-14 13:54:28,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6283, PETRI_PLACES=337, PETRI_TRANSITIONS=488} [2024-06-14 13:54:28,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:54:28,279 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 488 transitions, 6283 flow [2024-06-14 13:54:28,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:28,279 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, 1] [2024-06-14 13:54:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:54:28,279 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:28,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -376143172, now seen corresponding path program 25 times [2024-06-14 13:54:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:28,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912975354] [2024-06-14 13:54:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912975354] [2024-06-14 13:54:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912975354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:28,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:28,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401734407] [2024-06-14 13:54:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:28,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:28,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 488 transitions, 6283 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:28,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:28,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:29,468 INFO L124 PetriNetUnfolderBase]: 2084/3552 cut-off events. [2024-06-14 13:54:29,469 INFO L125 PetriNetUnfolderBase]: For 193068/193078 co-relation queries the response was YES. [2024-06-14 13:54:29,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24226 conditions, 3552 events. 2084/3552 cut-off events. For 193068/193078 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22232 event pairs, 380 based on Foata normal form. 11/3563 useless extension candidates. Maximal degree in co-relation 24073. Up to 2929 conditions per place. [2024-06-14 13:54:29,515 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 117 changer transitions 0/512 dead transitions. [2024-06-14 13:54:29,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 512 transitions, 7355 flow [2024-06-14 13:54:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:29,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:54:29,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:54:29,516 INFO L175 Difference]: Start difference. First operand has 337 places, 488 transitions, 6283 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:54:29,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 512 transitions, 7355 flow [2024-06-14 13:54:30,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 512 transitions, 6799 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:30,730 INFO L231 Difference]: Finished difference. Result has 334 places, 488 transitions, 5974 flow [2024-06-14 13:54:30,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5727, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=334, PETRI_TRANSITIONS=488} [2024-06-14 13:54:30,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:54:30,731 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 488 transitions, 5974 flow [2024-06-14 13:54:30,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:30,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:30,731 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, 1] [2024-06-14 13:54:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:54:30,732 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:30,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -363256162, now seen corresponding path program 26 times [2024-06-14 13:54:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439858163] [2024-06-14 13:54:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:31,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439858163] [2024-06-14 13:54:31,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439858163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:31,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:31,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:31,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621557673] [2024-06-14 13:54:31,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:31,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:31,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:31,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:31,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 488 transitions, 5974 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:31,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:31,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:31,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:31,815 INFO L124 PetriNetUnfolderBase]: 2089/3557 cut-off events. [2024-06-14 13:54:31,815 INFO L125 PetriNetUnfolderBase]: For 191287/191289 co-relation queries the response was YES. [2024-06-14 13:54:31,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24089 conditions, 3557 events. 2089/3557 cut-off events. For 191287/191289 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 22222 event pairs, 358 based on Foata normal form. 3/3560 useless extension candidates. Maximal degree in co-relation 23936. Up to 2925 conditions per place. [2024-06-14 13:54:31,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 144 changer transitions 0/528 dead transitions. [2024-06-14 13:54:31,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 528 transitions, 7484 flow [2024-06-14 13:54:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:54:31,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:54:31,862 INFO L175 Difference]: Start difference. First operand has 334 places, 488 transitions, 5974 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:54:31,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 528 transitions, 7484 flow [2024-06-14 13:54:32,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 528 transitions, 7224 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:32,855 INFO L231 Difference]: Finished difference. Result has 335 places, 495 transitions, 6209 flow [2024-06-14 13:54:32,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=335, PETRI_TRANSITIONS=495} [2024-06-14 13:54:32,855 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 13:54:32,856 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 495 transitions, 6209 flow [2024-06-14 13:54:32,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:32,856 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, 1] [2024-06-14 13:54:32,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:54:32,856 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:32,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:32,857 INFO L85 PathProgramCache]: Analyzing trace with hash -197022382, now seen corresponding path program 27 times [2024-06-14 13:54:32,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:32,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497821996] [2024-06-14 13:54:32,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:32,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:33,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:33,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497821996] [2024-06-14 13:54:33,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497821996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:33,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:33,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207138166] [2024-06-14 13:54:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:33,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:33,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:33,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 495 transitions, 6209 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:33,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:33,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:34,056 INFO L124 PetriNetUnfolderBase]: 2094/3566 cut-off events. [2024-06-14 13:54:34,057 INFO L125 PetriNetUnfolderBase]: For 191750/191752 co-relation queries the response was YES. [2024-06-14 13:54:34,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24339 conditions, 3566 events. 2094/3566 cut-off events. For 191750/191752 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 22330 event pairs, 356 based on Foata normal form. 3/3569 useless extension candidates. Maximal degree in co-relation 24185. Up to 2931 conditions per place. [2024-06-14 13:54:34,103 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 155 changer transitions 0/534 dead transitions. [2024-06-14 13:54:34,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 534 transitions, 7680 flow [2024-06-14 13:54:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 13:54:34,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 13:54:34,104 INFO L175 Difference]: Start difference. First operand has 335 places, 495 transitions, 6209 flow. Second operand 11 states and 235 transitions. [2024-06-14 13:54:34,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 534 transitions, 7680 flow [2024-06-14 13:54:35,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 534 transitions, 7453 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:35,216 INFO L231 Difference]: Finished difference. Result has 342 places, 498 transitions, 6362 flow [2024-06-14 13:54:35,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6362, PETRI_PLACES=342, PETRI_TRANSITIONS=498} [2024-06-14 13:54:35,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-14 13:54:35,217 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 498 transitions, 6362 flow [2024-06-14 13:54:35,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:35,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:35,217 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, 1] [2024-06-14 13:54:35,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:54:35,217 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:35,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:35,218 INFO L85 PathProgramCache]: Analyzing trace with hash -204374032, now seen corresponding path program 28 times [2024-06-14 13:54:35,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:35,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941173668] [2024-06-14 13:54:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:35,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:35,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:35,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941173668] [2024-06-14 13:54:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941173668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:35,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:35,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:35,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095908428] [2024-06-14 13:54:35,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:35,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:35,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:35,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:35,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:35,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 498 transitions, 6362 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:35,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:35,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:35,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:36,347 INFO L124 PetriNetUnfolderBase]: 2099/3575 cut-off events. [2024-06-14 13:54:36,347 INFO L125 PetriNetUnfolderBase]: For 196749/196751 co-relation queries the response was YES. [2024-06-14 13:54:36,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24505 conditions, 3575 events. 2099/3575 cut-off events. For 196749/196751 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22387 event pairs, 356 based on Foata normal form. 3/3578 useless extension candidates. Maximal degree in co-relation 24350. Up to 2937 conditions per place. [2024-06-14 13:54:36,392 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 373 selfloop transitions, 159 changer transitions 0/538 dead transitions. [2024-06-14 13:54:36,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 538 transitions, 7848 flow [2024-06-14 13:54:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 13:54:36,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 13:54:36,394 INFO L175 Difference]: Start difference. First operand has 342 places, 498 transitions, 6362 flow. Second operand 12 states and 254 transitions. [2024-06-14 13:54:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 538 transitions, 7848 flow [2024-06-14 13:54:37,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 538 transitions, 7472 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:37,650 INFO L231 Difference]: Finished difference. Result has 347 places, 502 transitions, 6393 flow [2024-06-14 13:54:37,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6002, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6393, PETRI_PLACES=347, PETRI_TRANSITIONS=502} [2024-06-14 13:54:37,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:54:37,657 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 502 transitions, 6393 flow [2024-06-14 13:54:37,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:37,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:37,658 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, 1] [2024-06-14 13:54:37,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:54:37,659 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:37,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:37,659 INFO L85 PathProgramCache]: Analyzing trace with hash -204379612, now seen corresponding path program 29 times [2024-06-14 13:54:37,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:37,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728753279] [2024-06-14 13:54:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:37,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728753279] [2024-06-14 13:54:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728753279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:38,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:54:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989923045] [2024-06-14 13:54:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:38,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:54:38,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:38,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:54:38,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:54:38,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:38,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 502 transitions, 6393 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:38,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:38,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:38,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:38,859 INFO L124 PetriNetUnfolderBase]: 2096/3571 cut-off events. [2024-06-14 13:54:38,859 INFO L125 PetriNetUnfolderBase]: For 197226/197228 co-relation queries the response was YES. [2024-06-14 13:54:38,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24401 conditions, 3571 events. 2096/3571 cut-off events. For 197226/197228 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22389 event pairs, 356 based on Foata normal form. 3/3574 useless extension candidates. Maximal degree in co-relation 24244. Up to 2934 conditions per place. [2024-06-14 13:54:38,910 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 163 changer transitions 0/538 dead transitions. [2024-06-14 13:54:38,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 538 transitions, 7644 flow [2024-06-14 13:54:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 268 transitions. [2024-06-14 13:54:38,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028142589118199 [2024-06-14 13:54:38,911 INFO L175 Difference]: Start difference. First operand has 347 places, 502 transitions, 6393 flow. Second operand 13 states and 268 transitions. [2024-06-14 13:54:38,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 538 transitions, 7644 flow [2024-06-14 13:54:39,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 538 transitions, 7336 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:39,714 INFO L231 Difference]: Finished difference. Result has 352 places, 502 transitions, 6417 flow [2024-06-14 13:54:39,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6417, PETRI_PLACES=352, PETRI_TRANSITIONS=502} [2024-06-14 13:54:39,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:54:39,715 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 502 transitions, 6417 flow [2024-06-14 13:54:39,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:39,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:39,716 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, 1] [2024-06-14 13:54:39,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:54:39,716 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:39,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1974098448, now seen corresponding path program 30 times [2024-06-14 13:54:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:39,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548820283] [2024-06-14 13:54:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:39,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:40,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548820283] [2024-06-14 13:54:40,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548820283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:40,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:40,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:40,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164543502] [2024-06-14 13:54:40,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:40,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:40,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:40,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:40,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:40,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:40,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 502 transitions, 6417 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:40,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:40,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:41,022 INFO L124 PetriNetUnfolderBase]: 2109/3593 cut-off events. [2024-06-14 13:54:41,022 INFO L125 PetriNetUnfolderBase]: For 205529/205531 co-relation queries the response was YES. [2024-06-14 13:54:41,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24714 conditions, 3593 events. 2109/3593 cut-off events. For 205529/205531 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22538 event pairs, 356 based on Foata normal form. 3/3596 useless extension candidates. Maximal degree in co-relation 24556. Up to 3040 conditions per place. [2024-06-14 13:54:41,070 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 433 selfloop transitions, 99 changer transitions 0/538 dead transitions. [2024-06-14 13:54:41,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 538 transitions, 7852 flow [2024-06-14 13:54:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:54:41,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:54:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-14 13:54:41,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-14 13:54:41,072 INFO L175 Difference]: Start difference. First operand has 352 places, 502 transitions, 6417 flow. Second operand 15 states and 298 transitions. [2024-06-14 13:54:41,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 538 transitions, 7852 flow [2024-06-14 13:54:42,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 538 transitions, 7538 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:42,098 INFO L231 Difference]: Finished difference. Result has 357 places, 508 transitions, 6445 flow [2024-06-14 13:54:42,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6103, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6445, PETRI_PLACES=357, PETRI_TRANSITIONS=508} [2024-06-14 13:54:42,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:54:42,099 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 508 transitions, 6445 flow [2024-06-14 13:54:42,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:42,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:42,099 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, 1] [2024-06-14 13:54:42,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:54:42,099 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:42,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:42,100 INFO L85 PathProgramCache]: Analyzing trace with hash -226622668, now seen corresponding path program 31 times [2024-06-14 13:54:42,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:42,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185718968] [2024-06-14 13:54:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:42,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:42,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185718968] [2024-06-14 13:54:42,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185718968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:42,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:42,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463825626] [2024-06-14 13:54:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:42,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:42,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:42,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:42,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:42,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:42,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 508 transitions, 6445 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:42,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:42,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:42,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:43,292 INFO L124 PetriNetUnfolderBase]: 2106/3589 cut-off events. [2024-06-14 13:54:43,292 INFO L125 PetriNetUnfolderBase]: For 208463/208465 co-relation queries the response was YES. [2024-06-14 13:54:43,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24843 conditions, 3589 events. 2106/3589 cut-off events. For 208463/208465 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22523 event pairs, 356 based on Foata normal form. 3/3592 useless extension candidates. Maximal degree in co-relation 24684. Up to 3037 conditions per place. [2024-06-14 13:54:43,340 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 431 selfloop transitions, 99 changer transitions 0/536 dead transitions. [2024-06-14 13:54:43,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 536 transitions, 7574 flow [2024-06-14 13:54:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:54:43,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:54:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-14 13:54:43,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895470383275261 [2024-06-14 13:54:43,341 INFO L175 Difference]: Start difference. First operand has 357 places, 508 transitions, 6445 flow. Second operand 14 states and 281 transitions. [2024-06-14 13:54:43,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 536 transitions, 7574 flow [2024-06-14 13:54:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 536 transitions, 7323 flow, removed 63 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:44,459 INFO L231 Difference]: Finished difference. Result has 360 places, 508 transitions, 6398 flow [2024-06-14 13:54:44,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6398, PETRI_PLACES=360, PETRI_TRANSITIONS=508} [2024-06-14 13:54:44,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 13:54:44,460 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 508 transitions, 6398 flow [2024-06-14 13:54:44,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:44,460 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, 1] [2024-06-14 13:54:44,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:54:44,460 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:44,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1320336164, now seen corresponding path program 32 times [2024-06-14 13:54:44,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:44,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127337797] [2024-06-14 13:54:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:44,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127337797] [2024-06-14 13:54:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127337797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:44,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:44,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:44,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065503412] [2024-06-14 13:54:44,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:44,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:44,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:44,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:44,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:44,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:44,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 508 transitions, 6398 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:44,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:44,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:45,624 INFO L124 PetriNetUnfolderBase]: 2103/3585 cut-off events. [2024-06-14 13:54:45,625 INFO L125 PetriNetUnfolderBase]: For 208472/208474 co-relation queries the response was YES. [2024-06-14 13:54:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24826 conditions, 3585 events. 2103/3585 cut-off events. For 208472/208474 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22471 event pairs, 356 based on Foata normal form. 3/3588 useless extension candidates. Maximal degree in co-relation 24666. Up to 2730 conditions per place. [2024-06-14 13:54:45,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 312 changer transitions 0/539 dead transitions. [2024-06-14 13:54:45,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 539 transitions, 7605 flow [2024-06-14 13:54:45,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:54:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:54:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 285 transitions. [2024-06-14 13:54:45,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965156794425087 [2024-06-14 13:54:45,674 INFO L175 Difference]: Start difference. First operand has 360 places, 508 transitions, 6398 flow. Second operand 14 states and 285 transitions. [2024-06-14 13:54:45,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 539 transitions, 7605 flow [2024-06-14 13:54:46,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 539 transitions, 7407 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 13:54:46,758 INFO L231 Difference]: Finished difference. Result has 361 places, 511 transitions, 6908 flow [2024-06-14 13:54:46,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6908, PETRI_PLACES=361, PETRI_TRANSITIONS=511} [2024-06-14 13:54:46,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 13:54:46,759 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 511 transitions, 6908 flow [2024-06-14 13:54:46,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:46,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:46,759 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, 1, 1] [2024-06-14 13:54:46,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:54:46,760 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:46,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1940431753, now seen corresponding path program 1 times [2024-06-14 13:54:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:46,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482336919] [2024-06-14 13:54:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:47,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:47,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482336919] [2024-06-14 13:54:47,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482336919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:47,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:47,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566946520] [2024-06-14 13:54:47,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:47,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:47,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:47,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:47,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:47,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 511 transitions, 6908 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:47,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:47,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:47,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:47,941 INFO L124 PetriNetUnfolderBase]: 2189/3720 cut-off events. [2024-06-14 13:54:47,942 INFO L125 PetriNetUnfolderBase]: For 283541/283549 co-relation queries the response was YES. [2024-06-14 13:54:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27501 conditions, 3720 events. 2189/3720 cut-off events. For 283541/283549 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 23356 event pairs, 320 based on Foata normal form. 14/3727 useless extension candidates. Maximal degree in co-relation 27340. Up to 2108 conditions per place. [2024-06-14 13:54:47,992 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 414 selfloop transitions, 134 changer transitions 0/554 dead transitions. [2024-06-14 13:54:47,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 554 transitions, 8582 flow [2024-06-14 13:54:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:54:47,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:54:47,993 INFO L175 Difference]: Start difference. First operand has 361 places, 511 transitions, 6908 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:54:47,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 554 transitions, 8582 flow [2024-06-14 13:54:49,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 554 transitions, 7896 flow, removed 33 selfloop flow, removed 12 redundant places. [2024-06-14 13:54:49,425 INFO L231 Difference]: Finished difference. Result has 357 places, 514 transitions, 6550 flow [2024-06-14 13:54:49,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6222, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6550, PETRI_PLACES=357, PETRI_TRANSITIONS=514} [2024-06-14 13:54:49,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:54:49,425 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 514 transitions, 6550 flow [2024-06-14 13:54:49,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:49,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:49,426 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, 1, 1] [2024-06-14 13:54:49,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:54:49,426 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:49,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:49,426 INFO L85 PathProgramCache]: Analyzing trace with hash 768729067, now seen corresponding path program 2 times [2024-06-14 13:54:49,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:49,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753976327] [2024-06-14 13:54:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:49,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:49,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753976327] [2024-06-14 13:54:49,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753976327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:49,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:49,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:49,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223806402] [2024-06-14 13:54:49,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:49,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:49,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:49,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:49,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 514 transitions, 6550 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:49,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:49,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:50,588 INFO L124 PetriNetUnfolderBase]: 2217/3775 cut-off events. [2024-06-14 13:54:50,588 INFO L125 PetriNetUnfolderBase]: For 286245/286255 co-relation queries the response was YES. [2024-06-14 13:54:50,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27543 conditions, 3775 events. 2217/3775 cut-off events. For 286245/286255 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 23796 event pairs, 292 based on Foata normal form. 16/3791 useless extension candidates. Maximal degree in co-relation 27381. Up to 3068 conditions per place. [2024-06-14 13:54:50,638 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 473 selfloop transitions, 68 changer transitions 0/547 dead transitions. [2024-06-14 13:54:50,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 547 transitions, 7760 flow [2024-06-14 13:54:50,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:54:50,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:50,640 INFO L175 Difference]: Start difference. First operand has 357 places, 514 transitions, 6550 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:54:50,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 547 transitions, 7760 flow [2024-06-14 13:54:52,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 547 transitions, 7598 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:52,314 INFO L231 Difference]: Finished difference. Result has 362 places, 517 transitions, 6566 flow [2024-06-14 13:54:52,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6566, PETRI_PLACES=362, PETRI_TRANSITIONS=517} [2024-06-14 13:54:52,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 13:54:52,315 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 517 transitions, 6566 flow [2024-06-14 13:54:52,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:52,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:52,315 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, 1, 1] [2024-06-14 13:54:52,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:54:52,315 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:52,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:52,316 INFO L85 PathProgramCache]: Analyzing trace with hash 768729253, now seen corresponding path program 1 times [2024-06-14 13:54:52,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:52,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786097480] [2024-06-14 13:54:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:52,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:52,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:52,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786097480] [2024-06-14 13:54:52,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786097480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:52,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:52,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135377325] [2024-06-14 13:54:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:52,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:52,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:52,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 517 transitions, 6566 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:52,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:52,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:52,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:53,553 INFO L124 PetriNetUnfolderBase]: 2329/3955 cut-off events. [2024-06-14 13:54:53,553 INFO L125 PetriNetUnfolderBase]: For 357047/357057 co-relation queries the response was YES. [2024-06-14 13:54:53,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30479 conditions, 3955 events. 2329/3955 cut-off events. For 357047/357057 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 25090 event pairs, 333 based on Foata normal form. 16/3971 useless extension candidates. Maximal degree in co-relation 30315. Up to 2772 conditions per place. [2024-06-14 13:54:53,608 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 124 changer transitions 0/560 dead transitions. [2024-06-14 13:54:53,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 560 transitions, 8326 flow [2024-06-14 13:54:53,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 13:54:53,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:53,609 INFO L175 Difference]: Start difference. First operand has 362 places, 517 transitions, 6566 flow. Second operand 10 states and 225 transitions. [2024-06-14 13:54:53,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 560 transitions, 8326 flow [2024-06-14 13:54:55,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 560 transitions, 8186 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:55,179 INFO L231 Difference]: Finished difference. Result has 367 places, 520 transitions, 6758 flow [2024-06-14 13:54:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6426, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6758, PETRI_PLACES=367, PETRI_TRANSITIONS=520} [2024-06-14 13:54:55,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 13:54:55,180 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 520 transitions, 6758 flow [2024-06-14 13:54:55,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:55,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:55,180 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, 1, 1] [2024-06-14 13:54:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:54:55,180 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:55,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:55,181 INFO L85 PathProgramCache]: Analyzing trace with hash 946097923, now seen corresponding path program 2 times [2024-06-14 13:54:55,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:55,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288392580] [2024-06-14 13:54:55,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:55,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:55,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:55,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288392580] [2024-06-14 13:54:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288392580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:55,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:55,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:55,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379295030] [2024-06-14 13:54:55,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:55,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:55,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:55,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:55,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 520 transitions, 6758 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:55,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:55,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:55,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:56,480 INFO L124 PetriNetUnfolderBase]: 2439/4133 cut-off events. [2024-06-14 13:54:56,480 INFO L125 PetriNetUnfolderBase]: For 414664/414674 co-relation queries the response was YES. [2024-06-14 13:54:56,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33120 conditions, 4133 events. 2439/4133 cut-off events. For 414664/414674 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26414 event pairs, 360 based on Foata normal form. 16/4149 useless extension candidates. Maximal degree in co-relation 32955. Up to 2832 conditions per place. [2024-06-14 13:54:56,531 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 128 changer transitions 0/565 dead transitions. [2024-06-14 13:54:56,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 565 transitions, 8552 flow [2024-06-14 13:54:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:56,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-14 13:54:56,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-14 13:54:56,532 INFO L175 Difference]: Start difference. First operand has 367 places, 520 transitions, 6758 flow. Second operand 10 states and 221 transitions. [2024-06-14 13:54:56,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 565 transitions, 8552 flow [2024-06-14 13:54:58,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 565 transitions, 8415 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:58,372 INFO L231 Difference]: Finished difference. Result has 373 places, 529 transitions, 7034 flow [2024-06-14 13:54:58,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6621, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7034, PETRI_PLACES=373, PETRI_TRANSITIONS=529} [2024-06-14 13:54:58,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 13:54:58,373 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 529 transitions, 7034 flow [2024-06-14 13:54:58,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:58,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:58,373 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, 1, 1] [2024-06-14 13:54:58,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:54:58,374 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:58,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash 945860773, now seen corresponding path program 3 times [2024-06-14 13:54:58,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631623954] [2024-06-14 13:54:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:58,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:58,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631623954] [2024-06-14 13:54:58,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631623954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:58,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:58,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:54:58,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534338583] [2024-06-14 13:54:58,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:58,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:54:58,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:54:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:54:58,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:58,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 529 transitions, 7034 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:54:58,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:58,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:58,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:59,621 INFO L124 PetriNetUnfolderBase]: 2426/4118 cut-off events. [2024-06-14 13:54:59,621 INFO L125 PetriNetUnfolderBase]: For 399529/399539 co-relation queries the response was YES. [2024-06-14 13:54:59,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32922 conditions, 4118 events. 2426/4118 cut-off events. For 399529/399539 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26335 event pairs, 348 based on Foata normal form. 16/4134 useless extension candidates. Maximal degree in co-relation 32754. Up to 2826 conditions per place. [2024-06-14 13:54:59,678 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 436 selfloop transitions, 125 changer transitions 0/567 dead transitions. [2024-06-14 13:54:59,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 567 transitions, 8732 flow [2024-06-14 13:54:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:59,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:59,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:54:59,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 13:54:59,679 INFO L175 Difference]: Start difference. First operand has 373 places, 529 transitions, 7034 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:54:59,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 567 transitions, 8732 flow [2024-06-14 13:55:01,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 567 transitions, 8529 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:01,659 INFO L231 Difference]: Finished difference. Result has 378 places, 529 transitions, 7085 flow [2024-06-14 13:55:01,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6831, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7085, PETRI_PLACES=378, PETRI_TRANSITIONS=529} [2024-06-14 13:55:01,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 13:55:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 529 transitions, 7085 flow [2024-06-14 13:55:01,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:01,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:01,660 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, 1, 1] [2024-06-14 13:55:01,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:55:01,660 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:01,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1719906387, now seen corresponding path program 3 times [2024-06-14 13:55:01,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:01,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519605159] [2024-06-14 13:55:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:01,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519605159] [2024-06-14 13:55:02,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519605159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:02,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:02,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:02,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100438046] [2024-06-14 13:55:02,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:02,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:02,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:02,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:02,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 529 transitions, 7085 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:02,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:02,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:02,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:02,954 INFO L124 PetriNetUnfolderBase]: 2479/4207 cut-off events. [2024-06-14 13:55:02,954 INFO L125 PetriNetUnfolderBase]: For 434216/434226 co-relation queries the response was YES. [2024-06-14 13:55:02,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34058 conditions, 4207 events. 2479/4207 cut-off events. For 434216/434226 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 26974 event pairs, 340 based on Foata normal form. 16/4223 useless extension candidates. Maximal degree in co-relation 33889. Up to 3397 conditions per place. [2024-06-14 13:55:03,016 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 481 selfloop transitions, 76 changer transitions 0/563 dead transitions. [2024-06-14 13:55:03,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 563 transitions, 8529 flow [2024-06-14 13:55:03,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:55:03,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 13:55:03,017 INFO L175 Difference]: Start difference. First operand has 378 places, 529 transitions, 7085 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:55:03,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 563 transitions, 8529 flow [2024-06-14 13:55:04,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 563 transitions, 8344 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:04,916 INFO L231 Difference]: Finished difference. Result has 383 places, 531 transitions, 7099 flow [2024-06-14 13:55:04,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6900, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7099, PETRI_PLACES=383, PETRI_TRANSITIONS=531} [2024-06-14 13:55:04,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-14 13:55:04,917 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 531 transitions, 7099 flow [2024-06-14 13:55:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:04,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:04,917 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, 1, 1] [2024-06-14 13:55:04,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:55:04,918 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:04,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:04,918 INFO L85 PathProgramCache]: Analyzing trace with hash -19041463, now seen corresponding path program 4 times [2024-06-14 13:55:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818199360] [2024-06-14 13:55:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:05,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818199360] [2024-06-14 13:55:05,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818199360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:05,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:05,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820146602] [2024-06-14 13:55:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:05,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:05,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:05,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:05,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:05,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 531 transitions, 7099 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:05,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:05,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:05,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:06,275 INFO L124 PetriNetUnfolderBase]: 2611/4411 cut-off events. [2024-06-14 13:55:06,275 INFO L125 PetriNetUnfolderBase]: For 533794/533802 co-relation queries the response was YES. [2024-06-14 13:55:06,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37389 conditions, 4411 events. 2611/4411 cut-off events. For 533794/533802 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 28404 event pairs, 555 based on Foata normal form. 14/4417 useless extension candidates. Maximal degree in co-relation 37218. Up to 3321 conditions per place. [2024-06-14 13:55:06,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 131 changer transitions 0/574 dead transitions. [2024-06-14 13:55:06,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 574 transitions, 8862 flow [2024-06-14 13:55:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:55:06,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:55:06,338 INFO L175 Difference]: Start difference. First operand has 383 places, 531 transitions, 7099 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:55:06,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 574 transitions, 8862 flow [2024-06-14 13:55:09,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 574 transitions, 8634 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:09,299 INFO L231 Difference]: Finished difference. Result has 384 places, 535 transitions, 7228 flow [2024-06-14 13:55:09,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7228, PETRI_PLACES=384, PETRI_TRANSITIONS=535} [2024-06-14 13:55:09,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 13:55:09,300 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 535 transitions, 7228 flow [2024-06-14 13:55:09,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:09,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:09,300 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, 1, 1] [2024-06-14 13:55:09,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:55:09,301 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:09,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash 123061607, now seen corresponding path program 5 times [2024-06-14 13:55:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:09,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986130049] [2024-06-14 13:55:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:09,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986130049] [2024-06-14 13:55:09,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986130049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:09,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:09,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:09,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002941960] [2024-06-14 13:55:09,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:09,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:09,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:09,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 535 transitions, 7228 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:09,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:09,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:10,627 INFO L124 PetriNetUnfolderBase]: 2639/4454 cut-off events. [2024-06-14 13:55:10,627 INFO L125 PetriNetUnfolderBase]: For 553174/553182 co-relation queries the response was YES. [2024-06-14 13:55:10,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37806 conditions, 4454 events. 2639/4454 cut-off events. For 553174/553182 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 28727 event pairs, 597 based on Foata normal form. 16/4467 useless extension candidates. Maximal degree in co-relation 37635. Up to 3548 conditions per place. [2024-06-14 13:55:10,801 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 128 changer transitions 0/572 dead transitions. [2024-06-14 13:55:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 572 transitions, 8746 flow [2024-06-14 13:55:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:10,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:55:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:55:10,802 INFO L175 Difference]: Start difference. First operand has 384 places, 535 transitions, 7228 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:55:10,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 572 transitions, 8746 flow [2024-06-14 13:55:13,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 572 transitions, 8593 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:55:13,373 INFO L231 Difference]: Finished difference. Result has 389 places, 536 transitions, 7357 flow [2024-06-14 13:55:13,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7357, PETRI_PLACES=389, PETRI_TRANSITIONS=536} [2024-06-14 13:55:13,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:55:13,374 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 536 transitions, 7357 flow [2024-06-14 13:55:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:13,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:13,374 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, 1, 1] [2024-06-14 13:55:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:55:13,375 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:13,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash -18921307, now seen corresponding path program 4 times [2024-06-14 13:55:13,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:13,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175100002] [2024-06-14 13:55:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:13,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175100002] [2024-06-14 13:55:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175100002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:13,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:13,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696927805] [2024-06-14 13:55:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:13,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:13,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:13,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 536 transitions, 7357 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:13,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:13,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:13,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:14,802 INFO L124 PetriNetUnfolderBase]: 2705/4566 cut-off events. [2024-06-14 13:55:14,803 INFO L125 PetriNetUnfolderBase]: For 590589/590599 co-relation queries the response was YES. [2024-06-14 13:55:14,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39750 conditions, 4566 events. 2705/4566 cut-off events. For 590589/590599 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 29608 event pairs, 597 based on Foata normal form. 16/4573 useless extension candidates. Maximal degree in co-relation 39577. Up to 3818 conditions per place. [2024-06-14 13:55:14,871 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 453 selfloop transitions, 115 changer transitions 0/574 dead transitions. [2024-06-14 13:55:14,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 574 transitions, 8898 flow [2024-06-14 13:55:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 13:55:14,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 13:55:14,872 INFO L175 Difference]: Start difference. First operand has 389 places, 536 transitions, 7357 flow. Second operand 11 states and 237 transitions. [2024-06-14 13:55:14,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 574 transitions, 8898 flow [2024-06-14 13:55:18,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 574 transitions, 8627 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:18,137 INFO L231 Difference]: Finished difference. Result has 395 places, 538 transitions, 7399 flow [2024-06-14 13:55:18,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7399, PETRI_PLACES=395, PETRI_TRANSITIONS=538} [2024-06-14 13:55:18,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 13:55:18,138 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 538 transitions, 7399 flow [2024-06-14 13:55:18,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:18,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:18,138 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, 1, 1] [2024-06-14 13:55:18,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:55:18,140 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -18921493, now seen corresponding path program 6 times [2024-06-14 13:55:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:18,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745843646] [2024-06-14 13:55:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:18,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:18,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:18,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:18,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745843646] [2024-06-14 13:55:18,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745843646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:18,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:18,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:18,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346129240] [2024-06-14 13:55:18,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:18,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:18,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:18,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:18,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:18,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:18,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 538 transitions, 7399 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:18,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:18,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:18,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:19,584 INFO L124 PetriNetUnfolderBase]: 2692/4541 cut-off events. [2024-06-14 13:55:19,584 INFO L125 PetriNetUnfolderBase]: For 576864/576874 co-relation queries the response was YES. [2024-06-14 13:55:19,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39137 conditions, 4541 events. 2692/4541 cut-off events. For 576864/576874 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 29416 event pairs, 586 based on Foata normal form. 16/4546 useless extension candidates. Maximal degree in co-relation 38962. Up to 3937 conditions per place. [2024-06-14 13:55:19,655 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 503 selfloop transitions, 58 changer transitions 0/567 dead transitions. [2024-06-14 13:55:19,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 567 transitions, 8611 flow [2024-06-14 13:55:19,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:19,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:55:19,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:55:19,658 INFO L175 Difference]: Start difference. First operand has 395 places, 538 transitions, 7399 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:55:19,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 567 transitions, 8611 flow [2024-06-14 13:55:22,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 567 transitions, 8398 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:22,565 INFO L231 Difference]: Finished difference. Result has 396 places, 538 transitions, 7306 flow [2024-06-14 13:55:22,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7186, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7306, PETRI_PLACES=396, PETRI_TRANSITIONS=538} [2024-06-14 13:55:22,567 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-14 13:55:22,567 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 538 transitions, 7306 flow [2024-06-14 13:55:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:22,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:22,577 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, 1, 1] [2024-06-14 13:55:22,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:55:22,578 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:22,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 131632487, now seen corresponding path program 7 times [2024-06-14 13:55:22,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:22,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095793343] [2024-06-14 13:55:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:22,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095793343] [2024-06-14 13:55:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095793343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861526076] [2024-06-14 13:55:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:23,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:23,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 538 transitions, 7306 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:23,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:23,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:23,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:23,954 INFO L124 PetriNetUnfolderBase]: 2720/4595 cut-off events. [2024-06-14 13:55:23,954 INFO L125 PetriNetUnfolderBase]: For 596399/596407 co-relation queries the response was YES. [2024-06-14 13:55:24,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39439 conditions, 4595 events. 2720/4595 cut-off events. For 596399/596407 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 29910 event pairs, 632 based on Foata normal form. 16/4610 useless extension candidates. Maximal degree in co-relation 39263. Up to 3841 conditions per place. [2024-06-14 13:55:24,026 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 434 selfloop transitions, 127 changer transitions 0/567 dead transitions. [2024-06-14 13:55:24,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 567 transitions, 8560 flow [2024-06-14 13:55:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:55:24,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:55:24,027 INFO L175 Difference]: Start difference. First operand has 396 places, 538 transitions, 7306 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:55:24,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 567 transitions, 8560 flow [2024-06-14 13:55:27,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 567 transitions, 8439 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:27,068 INFO L231 Difference]: Finished difference. Result has 398 places, 539 transitions, 7464 flow [2024-06-14 13:55:27,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7185, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7464, PETRI_PLACES=398, PETRI_TRANSITIONS=539} [2024-06-14 13:55:27,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 13:55:27,069 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 539 transitions, 7464 flow [2024-06-14 13:55:27,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:27,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:27,069 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, 1, 1] [2024-06-14 13:55:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:55:27,070 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:27,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1717953483, now seen corresponding path program 5 times [2024-06-14 13:55:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490215477] [2024-06-14 13:55:27,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:27,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:27,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:27,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490215477] [2024-06-14 13:55:27,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490215477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:27,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:27,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:27,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400720749] [2024-06-14 13:55:27,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:27,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:27,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:27,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:27,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:27,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:27,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 539 transitions, 7464 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:27,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:27,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:27,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:28,548 INFO L124 PetriNetUnfolderBase]: 2748/4636 cut-off events. [2024-06-14 13:55:28,549 INFO L125 PetriNetUnfolderBase]: For 609480/609490 co-relation queries the response was YES. [2024-06-14 13:55:28,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40145 conditions, 4636 events. 2748/4636 cut-off events. For 609480/609490 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 30130 event pairs, 613 based on Foata normal form. 18/4654 useless extension candidates. Maximal degree in co-relation 39968. Up to 3989 conditions per place. [2024-06-14 13:55:28,616 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 452 selfloop transitions, 110 changer transitions 0/568 dead transitions. [2024-06-14 13:55:28,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 568 transitions, 8737 flow [2024-06-14 13:55:28,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:28,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 13:55:28,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 13:55:28,618 INFO L175 Difference]: Start difference. First operand has 398 places, 539 transitions, 7464 flow. Second operand 11 states and 230 transitions. [2024-06-14 13:55:28,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 568 transitions, 8737 flow [2024-06-14 13:55:32,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 568 transitions, 8482 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:32,075 INFO L231 Difference]: Finished difference. Result has 403 places, 540 transitions, 7467 flow [2024-06-14 13:55:32,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7209, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7467, PETRI_PLACES=403, PETRI_TRANSITIONS=540} [2024-06-14 13:55:32,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 13:55:32,076 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 540 transitions, 7467 flow [2024-06-14 13:55:32,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:32,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:32,077 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, 1, 1] [2024-06-14 13:55:32,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:55:32,077 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:32,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:32,077 INFO L85 PathProgramCache]: Analyzing trace with hash 246775973, now seen corresponding path program 6 times [2024-06-14 13:55:32,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:32,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135824171] [2024-06-14 13:55:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:32,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:32,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:32,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135824171] [2024-06-14 13:55:32,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135824171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:32,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:32,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:32,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53765715] [2024-06-14 13:55:32,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:32,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:32,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:32,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 540 transitions, 7467 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:32,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:32,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:32,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:33,644 INFO L124 PetriNetUnfolderBase]: 2776/4686 cut-off events. [2024-06-14 13:55:33,644 INFO L125 PetriNetUnfolderBase]: For 613818/613828 co-relation queries the response was YES. [2024-06-14 13:55:33,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40556 conditions, 4686 events. 2776/4686 cut-off events. For 613818/613828 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30545 event pairs, 611 based on Foata normal form. 16/4700 useless extension candidates. Maximal degree in co-relation 40378. Up to 4003 conditions per place. [2024-06-14 13:55:33,708 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 456 selfloop transitions, 113 changer transitions 0/575 dead transitions. [2024-06-14 13:55:33,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 575 transitions, 8814 flow [2024-06-14 13:55:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 13:55:33,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-14 13:55:33,709 INFO L175 Difference]: Start difference. First operand has 403 places, 540 transitions, 7467 flow. Second operand 12 states and 249 transitions. [2024-06-14 13:55:33,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 575 transitions, 8814 flow [2024-06-14 13:55:36,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 575 transitions, 8587 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:36,844 INFO L231 Difference]: Finished difference. Result has 407 places, 543 transitions, 7539 flow [2024-06-14 13:55:36,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7539, PETRI_PLACES=407, PETRI_TRANSITIONS=543} [2024-06-14 13:55:36,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-14 13:55:36,845 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 543 transitions, 7539 flow [2024-06-14 13:55:36,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:36,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:36,845 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, 1, 1] [2024-06-14 13:55:36,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:55:36,846 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:36,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:36,846 INFO L85 PathProgramCache]: Analyzing trace with hash 246775787, now seen corresponding path program 8 times [2024-06-14 13:55:36,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:36,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132770916] [2024-06-14 13:55:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:37,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:37,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132770916] [2024-06-14 13:55:37,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132770916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:37,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:37,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630693890] [2024-06-14 13:55:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:37,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:37,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:37,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 543 transitions, 7539 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:37,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:37,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:37,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:38,357 INFO L124 PetriNetUnfolderBase]: 2842/4792 cut-off events. [2024-06-14 13:55:38,358 INFO L125 PetriNetUnfolderBase]: For 666873/666883 co-relation queries the response was YES. [2024-06-14 13:55:38,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 4792 events. 2842/4792 cut-off events. For 666873/666883 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31362 event pairs, 629 based on Foata normal form. 16/4806 useless extension candidates. Maximal degree in co-relation 42004. Up to 4148 conditions per place. [2024-06-14 13:55:38,430 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 510 selfloop transitions, 59 changer transitions 0/575 dead transitions. [2024-06-14 13:55:38,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 575 transitions, 9050 flow [2024-06-14 13:55:38,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:38,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:38,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 13:55:38,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 13:55:38,431 INFO L175 Difference]: Start difference. First operand has 407 places, 543 transitions, 7539 flow. Second operand 9 states and 196 transitions. [2024-06-14 13:55:38,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 575 transitions, 9050 flow [2024-06-14 13:55:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 575 transitions, 8816 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:42,207 INFO L231 Difference]: Finished difference. Result has 408 places, 545 transitions, 7476 flow [2024-06-14 13:55:42,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7305, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7476, PETRI_PLACES=408, PETRI_TRANSITIONS=545} [2024-06-14 13:55:42,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:55:42,208 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 545 transitions, 7476 flow [2024-06-14 13:55:42,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:42,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:42,208 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, 1, 1] [2024-06-14 13:55:42,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:55:42,208 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:42,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:42,209 INFO L85 PathProgramCache]: Analyzing trace with hash 246923657, now seen corresponding path program 9 times [2024-06-14 13:55:42,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:42,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938851490] [2024-06-14 13:55:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:42,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:42,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:42,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938851490] [2024-06-14 13:55:42,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938851490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:42,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:42,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:42,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748923288] [2024-06-14 13:55:42,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:42,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:42,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:42,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:42,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:42,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:42,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 545 transitions, 7476 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:42,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:42,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:42,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:43,675 INFO L124 PetriNetUnfolderBase]: 2824/4760 cut-off events. [2024-06-14 13:55:43,676 INFO L125 PetriNetUnfolderBase]: For 648353/648363 co-relation queries the response was YES. [2024-06-14 13:55:43,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41220 conditions, 4760 events. 2824/4760 cut-off events. For 648353/648363 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 31078 event pairs, 627 based on Foata normal form. 18/4778 useless extension candidates. Maximal degree in co-relation 41038. Up to 4170 conditions per place. [2024-06-14 13:55:43,749 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 508 selfloop transitions, 56 changer transitions 0/570 dead transitions. [2024-06-14 13:55:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 570 transitions, 8710 flow [2024-06-14 13:55:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:55:43,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:55:43,751 INFO L175 Difference]: Start difference. First operand has 408 places, 545 transitions, 7476 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:55:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 570 transitions, 8710 flow [2024-06-14 13:55:46,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 570 transitions, 8586 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:46,865 INFO L231 Difference]: Finished difference. Result has 410 places, 545 transitions, 7469 flow [2024-06-14 13:55:46,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7469, PETRI_PLACES=410, PETRI_TRANSITIONS=545} [2024-06-14 13:55:46,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-14 13:55:46,865 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 545 transitions, 7469 flow [2024-06-14 13:55:46,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:46,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:46,866 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, 1, 1] [2024-06-14 13:55:46,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:55:46,866 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:46,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:46,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1100297567, now seen corresponding path program 7 times [2024-06-14 13:55:46,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:46,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080730693] [2024-06-14 13:55:46,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:46,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080730693] [2024-06-14 13:55:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080730693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:47,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:47,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:47,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198158265] [2024-06-14 13:55:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:47,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:47,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:47,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:47,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:47,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:47,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 545 transitions, 7469 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:47,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:47,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:47,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:48,359 INFO L124 PetriNetUnfolderBase]: 2852/4808 cut-off events. [2024-06-14 13:55:48,360 INFO L125 PetriNetUnfolderBase]: For 661245/661255 co-relation queries the response was YES. [2024-06-14 13:55:48,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41695 conditions, 4808 events. 2852/4808 cut-off events. For 661245/661255 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 31487 event pairs, 633 based on Foata normal form. 18/4826 useless extension candidates. Maximal degree in co-relation 41512. Up to 4153 conditions per place. [2024-06-14 13:55:48,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 457 selfloop transitions, 107 changer transitions 0/570 dead transitions. [2024-06-14 13:55:48,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 570 transitions, 8740 flow [2024-06-14 13:55:48,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:55:48,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 13:55:48,434 INFO L175 Difference]: Start difference. First operand has 410 places, 545 transitions, 7469 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:55:48,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 570 transitions, 8740 flow [2024-06-14 13:55:51,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 570 transitions, 8631 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:51,726 INFO L231 Difference]: Finished difference. Result has 414 places, 546 transitions, 7616 flow [2024-06-14 13:55:51,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7360, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7616, PETRI_PLACES=414, PETRI_TRANSITIONS=546} [2024-06-14 13:55:51,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-14 13:55:51,727 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 546 transitions, 7616 flow [2024-06-14 13:55:51,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:51,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:51,727 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, 1, 1] [2024-06-14 13:55:51,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:55:51,728 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:51,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:51,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1465143417, now seen corresponding path program 8 times [2024-06-14 13:55:51,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:51,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999932190] [2024-06-14 13:55:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:51,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999932190] [2024-06-14 13:55:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999932190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:52,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:52,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:52,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685503475] [2024-06-14 13:55:52,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:52,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:52,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:52,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:52,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:52,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:52,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 546 transitions, 7616 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:52,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:52,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:52,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:53,322 INFO L124 PetriNetUnfolderBase]: 2880/4852 cut-off events. [2024-06-14 13:55:53,322 INFO L125 PetriNetUnfolderBase]: For 676263/676273 co-relation queries the response was YES. [2024-06-14 13:55:53,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42419 conditions, 4852 events. 2880/4852 cut-off events. For 676263/676273 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31815 event pairs, 637 based on Foata normal form. 18/4870 useless extension candidates. Maximal degree in co-relation 42235. Up to 4197 conditions per place. [2024-06-14 13:55:53,413 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 108 changer transitions 0/573 dead transitions. [2024-06-14 13:55:53,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 573 transitions, 8899 flow [2024-06-14 13:55:53,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:53,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-14 13:55:53,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-14 13:55:53,414 INFO L175 Difference]: Start difference. First operand has 414 places, 546 transitions, 7616 flow. Second operand 12 states and 245 transitions. [2024-06-14 13:55:53,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 573 transitions, 8899 flow [2024-06-14 13:55:57,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 573 transitions, 8674 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:57,623 INFO L231 Difference]: Finished difference. Result has 418 places, 547 transitions, 7651 flow [2024-06-14 13:55:57,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7391, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7651, PETRI_PLACES=418, PETRI_TRANSITIONS=547} [2024-06-14 13:55:57,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 13:55:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 547 transitions, 7651 flow [2024-06-14 13:55:57,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:57,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:57,624 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, 1, 1] [2024-06-14 13:55:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:55:57,624 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:57,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:57,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1328377463, now seen corresponding path program 10 times [2024-06-14 13:55:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:57,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825856454] [2024-06-14 13:55:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:58,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825856454] [2024-06-14 13:55:58,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825856454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:58,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:58,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:58,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833491748] [2024-06-14 13:55:58,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:58,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:58,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:58,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:58,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:58,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:58,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 547 transitions, 7651 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:55:58,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:58,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:58,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:59,218 INFO L124 PetriNetUnfolderBase]: 2908/4900 cut-off events. [2024-06-14 13:55:59,218 INFO L125 PetriNetUnfolderBase]: For 689722/689732 co-relation queries the response was YES. [2024-06-14 13:55:59,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42810 conditions, 4900 events. 2908/4900 cut-off events. For 689722/689732 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 32246 event pairs, 641 based on Foata normal form. 18/4918 useless extension candidates. Maximal degree in co-relation 42625. Up to 4293 conditions per place. [2024-06-14 13:55:59,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 65 changer transitions 0/571 dead transitions. [2024-06-14 13:55:59,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 571 transitions, 8903 flow [2024-06-14 13:55:59,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 13:55:59,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 13:55:59,300 INFO L175 Difference]: Start difference. First operand has 418 places, 547 transitions, 7651 flow. Second operand 9 states and 190 transitions. [2024-06-14 13:55:59,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 571 transitions, 8903 flow [2024-06-14 13:56:03,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 571 transitions, 8674 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:03,210 INFO L231 Difference]: Finished difference. Result has 417 places, 548 transitions, 7581 flow [2024-06-14 13:56:03,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7422, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7581, PETRI_PLACES=417, PETRI_TRANSITIONS=548} [2024-06-14 13:56:03,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-14 13:56:03,224 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 548 transitions, 7581 flow [2024-06-14 13:56:03,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:03,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:03,224 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, 1, 1] [2024-06-14 13:56:03,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:56:03,225 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:03,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1417090907, now seen corresponding path program 9 times [2024-06-14 13:56:03,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:03,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352616289] [2024-06-14 13:56:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:03,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352616289] [2024-06-14 13:56:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352616289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:03,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:03,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:03,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887555495] [2024-06-14 13:56:03,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:03,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:03,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:03,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:03,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 548 transitions, 7581 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:03,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:03,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:03,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:04,894 INFO L124 PetriNetUnfolderBase]: 3077/5153 cut-off events. [2024-06-14 13:56:04,894 INFO L125 PetriNetUnfolderBase]: For 814541/814551 co-relation queries the response was YES. [2024-06-14 13:56:04,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47233 conditions, 5153 events. 3077/5153 cut-off events. For 814541/814551 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 33911 event pairs, 658 based on Foata normal form. 16/5163 useless extension candidates. Maximal degree in co-relation 47047. Up to 4129 conditions per place. [2024-06-14 13:56:04,979 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 465 selfloop transitions, 121 changer transitions 0/592 dead transitions. [2024-06-14 13:56:04,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 592 transitions, 9571 flow [2024-06-14 13:56:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 13:56:04,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 13:56:04,980 INFO L175 Difference]: Start difference. First operand has 417 places, 548 transitions, 7581 flow. Second operand 11 states and 236 transitions. [2024-06-14 13:56:04,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 592 transitions, 9571 flow [2024-06-14 13:56:09,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 592 transitions, 9436 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:09,323 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 7916 flow [2024-06-14 13:56:09,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7446, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7916, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-14 13:56:09,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:56:09,323 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 7916 flow [2024-06-14 13:56:09,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:09,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:09,324 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, 1, 1] [2024-06-14 13:56:09,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:56:09,324 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:09,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash 139780289, now seen corresponding path program 11 times [2024-06-14 13:56:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:09,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609977755] [2024-06-14 13:56:09,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:09,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:09,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:09,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609977755] [2024-06-14 13:56:09,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609977755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:09,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:09,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516803982] [2024-06-14 13:56:09,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:09,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:09,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:09,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 7916 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:09,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:09,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:09,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:11,052 INFO L124 PetriNetUnfolderBase]: 3176/5318 cut-off events. [2024-06-14 13:56:11,052 INFO L125 PetriNetUnfolderBase]: For 913730/913740 co-relation queries the response was YES. [2024-06-14 13:56:11,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50388 conditions, 5318 events. 3176/5318 cut-off events. For 913730/913740 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35237 event pairs, 713 based on Foata normal form. 16/5324 useless extension candidates. Maximal degree in co-relation 50199. Up to 4496 conditions per place. [2024-06-14 13:56:11,141 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 507 selfloop transitions, 76 changer transitions 0/589 dead transitions. [2024-06-14 13:56:11,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 589 transitions, 9504 flow [2024-06-14 13:56:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:56:11,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:56:11,143 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 7916 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:56:11,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 589 transitions, 9504 flow [2024-06-14 13:56:16,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 589 transitions, 9358 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:16,139 INFO L231 Difference]: Finished difference. Result has 427 places, 561 transitions, 8041 flow [2024-06-14 13:56:16,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7770, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8041, PETRI_PLACES=427, PETRI_TRANSITIONS=561} [2024-06-14 13:56:16,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-14 13:56:16,140 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 561 transitions, 8041 flow [2024-06-14 13:56:16,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:16,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:16,140 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, 1, 1] [2024-06-14 13:56:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:56:16,141 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:16,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash -523489759, now seen corresponding path program 10 times [2024-06-14 13:56:16,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:16,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196496236] [2024-06-14 13:56:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:16,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:16,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196496236] [2024-06-14 13:56:16,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196496236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:16,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:16,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:16,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463236818] [2024-06-14 13:56:16,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:16,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:16,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:16,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:16,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:16,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 561 transitions, 8041 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:16,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:16,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:17,849 INFO L124 PetriNetUnfolderBase]: 3229/5403 cut-off events. [2024-06-14 13:56:17,850 INFO L125 PetriNetUnfolderBase]: For 963249/963259 co-relation queries the response was YES. [2024-06-14 13:56:17,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52278 conditions, 5403 events. 3229/5403 cut-off events. For 963249/963259 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35822 event pairs, 698 based on Foata normal form. 16/5411 useless extension candidates. Maximal degree in co-relation 52086. Up to 4312 conditions per place. [2024-06-14 13:56:17,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 465 selfloop transitions, 125 changer transitions 0/596 dead transitions. [2024-06-14 13:56:17,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 596 transitions, 9889 flow [2024-06-14 13:56:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:17,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 13:56:17,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 13:56:17,937 INFO L175 Difference]: Start difference. First operand has 427 places, 561 transitions, 8041 flow. Second operand 11 states and 235 transitions. [2024-06-14 13:56:17,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 596 transitions, 9889 flow [2024-06-14 13:56:22,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 596 transitions, 9751 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:22,442 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 8223 flow [2024-06-14 13:56:22,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7903, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8223, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-14 13:56:22,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 13:56:22,442 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 8223 flow [2024-06-14 13:56:22,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:22,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:22,443 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, 1, 1] [2024-06-14 13:56:22,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:56:22,443 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:22,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:22,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525147, now seen corresponding path program 11 times [2024-06-14 13:56:22,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:22,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901138226] [2024-06-14 13:56:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:22,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:22,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901138226] [2024-06-14 13:56:22,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901138226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:22,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:22,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294440260] [2024-06-14 13:56:22,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:22,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:22,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:22,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 8223 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:22,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:22,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:22,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:24,161 INFO L124 PetriNetUnfolderBase]: 3216/5386 cut-off events. [2024-06-14 13:56:24,161 INFO L125 PetriNetUnfolderBase]: For 948299/948309 co-relation queries the response was YES. [2024-06-14 13:56:24,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51723 conditions, 5386 events. 3216/5386 cut-off events. For 948299/948309 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35781 event pairs, 739 based on Foata normal form. 16/5400 useless extension candidates. Maximal degree in co-relation 51530. Up to 4655 conditions per place. [2024-06-14 13:56:24,247 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 474 selfloop transitions, 112 changer transitions 0/592 dead transitions. [2024-06-14 13:56:24,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 592 transitions, 9539 flow [2024-06-14 13:56:24,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:24,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:56:24,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-14 13:56:24,248 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 8223 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:56:24,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 592 transitions, 9539 flow [2024-06-14 13:56:28,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 592 transitions, 9312 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:28,821 INFO L231 Difference]: Finished difference. Result has 438 places, 563 transitions, 8224 flow [2024-06-14 13:56:28,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7996, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8224, PETRI_PLACES=438, PETRI_TRANSITIONS=563} [2024-06-14 13:56:28,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 13:56:28,821 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 563 transitions, 8224 flow [2024-06-14 13:56:28,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:28,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:28,822 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, 1, 1] [2024-06-14 13:56:28,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:56:28,822 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:28,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:28,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525333, now seen corresponding path program 12 times [2024-06-14 13:56:28,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717469671] [2024-06-14 13:56:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717469671] [2024-06-14 13:56:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717469671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:29,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:29,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606670005] [2024-06-14 13:56:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:29,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:29,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 563 transitions, 8224 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:29,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:29,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:29,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:30,525 INFO L124 PetriNetUnfolderBase]: 3203/5367 cut-off events. [2024-06-14 13:56:30,525 INFO L125 PetriNetUnfolderBase]: For 929947/929957 co-relation queries the response was YES. [2024-06-14 13:56:30,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50898 conditions, 5367 events. 3203/5367 cut-off events. For 929947/929957 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35686 event pairs, 732 based on Foata normal form. 16/5381 useless extension candidates. Maximal degree in co-relation 50704. Up to 4720 conditions per place. [2024-06-14 13:56:30,610 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 68 changer transitions 0/590 dead transitions. [2024-06-14 13:56:30,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 590 transitions, 9520 flow [2024-06-14 13:56:30,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:30,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:30,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 13:56:30,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 13:56:30,611 INFO L175 Difference]: Start difference. First operand has 438 places, 563 transitions, 8224 flow. Second operand 10 states and 209 transitions. [2024-06-14 13:56:30,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 590 transitions, 9520 flow [2024-06-14 13:56:35,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 590 transitions, 9287 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:35,144 INFO L231 Difference]: Finished difference. Result has 439 places, 563 transitions, 8131 flow [2024-06-14 13:56:35,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7991, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8131, PETRI_PLACES=439, PETRI_TRANSITIONS=563} [2024-06-14 13:56:35,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 13:56:35,144 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 563 transitions, 8131 flow [2024-06-14 13:56:35,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:35,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:35,145 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, 1, 1] [2024-06-14 13:56:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:56:35,145 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:35,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -514552459, now seen corresponding path program 12 times [2024-06-14 13:56:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899774688] [2024-06-14 13:56:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899774688] [2024-06-14 13:56:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899774688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715376025] [2024-06-14 13:56:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:35,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:35,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:35,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 563 transitions, 8131 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:35,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:35,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:35,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:36,941 INFO L124 PetriNetUnfolderBase]: 3185/5343 cut-off events. [2024-06-14 13:56:36,941 INFO L125 PetriNetUnfolderBase]: For 907128/907138 co-relation queries the response was YES. [2024-06-14 13:56:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49765 conditions, 5343 events. 3185/5343 cut-off events. For 907128/907138 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35497 event pairs, 716 based on Foata normal form. 18/5361 useless extension candidates. Maximal degree in co-relation 49570. Up to 4478 conditions per place. [2024-06-14 13:56:37,040 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 475 selfloop transitions, 111 changer transitions 0/592 dead transitions. [2024-06-14 13:56:37,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 592 transitions, 9691 flow [2024-06-14 13:56:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 13:56:37,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:56:37,041 INFO L175 Difference]: Start difference. First operand has 439 places, 563 transitions, 8131 flow. Second operand 10 states and 215 transitions. [2024-06-14 13:56:37,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 592 transitions, 9691 flow [2024-06-14 13:56:42,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 592 transitions, 9547 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:42,009 INFO L231 Difference]: Finished difference. Result has 442 places, 563 transitions, 8213 flow [2024-06-14 13:56:42,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7987, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8213, PETRI_PLACES=442, PETRI_TRANSITIONS=563} [2024-06-14 13:56:42,010 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-14 13:56:42,010 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 563 transitions, 8213 flow [2024-06-14 13:56:42,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:42,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:42,010 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, 1, 1] [2024-06-14 13:56:42,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:56:42,011 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:42,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash 431824529, now seen corresponding path program 13 times [2024-06-14 13:56:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:42,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059319331] [2024-06-14 13:56:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:42,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059319331] [2024-06-14 13:56:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059319331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:42,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:42,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:42,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395179887] [2024-06-14 13:56:42,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:42,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:42,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:42,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:42,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:42,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:42,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 563 transitions, 8213 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:42,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:42,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:42,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:43,822 INFO L124 PetriNetUnfolderBase]: 3259/5461 cut-off events. [2024-06-14 13:56:43,823 INFO L125 PetriNetUnfolderBase]: For 975487/975497 co-relation queries the response was YES. [2024-06-14 13:56:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51748 conditions, 5461 events. 3259/5461 cut-off events. For 975487/975497 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 36463 event pairs, 746 based on Foata normal form. 18/5479 useless extension candidates. Maximal degree in co-relation 51552. Up to 4523 conditions per place. [2024-06-14 13:56:43,916 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 115 changer transitions 0/605 dead transitions. [2024-06-14 13:56:43,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 605 transitions, 9867 flow [2024-06-14 13:56:43,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:56:43,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 13:56:43,917 INFO L175 Difference]: Start difference. First operand has 442 places, 563 transitions, 8213 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:56:43,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 605 transitions, 9867 flow [2024-06-14 13:56:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 605 transitions, 9653 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:49,021 INFO L231 Difference]: Finished difference. Result has 443 places, 565 transitions, 8283 flow [2024-06-14 13:56:49,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8283, PETRI_PLACES=443, PETRI_TRANSITIONS=565} [2024-06-14 13:56:49,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 13:56:49,022 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 565 transitions, 8283 flow [2024-06-14 13:56:49,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:49,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:49,022 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, 1, 1] [2024-06-14 13:56:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:56:49,022 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:49,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 440395409, now seen corresponding path program 14 times [2024-06-14 13:56:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:49,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443235771] [2024-06-14 13:56:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:49,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:49,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:49,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443235771] [2024-06-14 13:56:49,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443235771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:49,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:49,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:49,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048844077] [2024-06-14 13:56:49,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:49,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:49,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:49,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:49,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:49,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:49,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 565 transitions, 8283 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:49,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:49,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:49,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:50,856 INFO L124 PetriNetUnfolderBase]: 3287/5501 cut-off events. [2024-06-14 13:56:50,856 INFO L125 PetriNetUnfolderBase]: For 994184/994194 co-relation queries the response was YES. [2024-06-14 13:56:50,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52283 conditions, 5501 events. 3287/5501 cut-off events. For 994184/994194 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 36731 event pairs, 764 based on Foata normal form. 18/5519 useless extension candidates. Maximal degree in co-relation 52086. Up to 4761 conditions per place. [2024-06-14 13:56:50,966 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 476 selfloop transitions, 116 changer transitions 0/598 dead transitions. [2024-06-14 13:56:50,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 598 transitions, 9617 flow [2024-06-14 13:56:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 13:56:50,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 13:56:50,968 INFO L175 Difference]: Start difference. First operand has 443 places, 565 transitions, 8283 flow. Second operand 9 states and 202 transitions. [2024-06-14 13:56:50,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 598 transitions, 9617 flow [2024-06-14 13:56:57,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 598 transitions, 9456 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:57,299 INFO L231 Difference]: Finished difference. Result has 447 places, 566 transitions, 8389 flow [2024-06-14 13:56:57,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8130, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8389, PETRI_PLACES=447, PETRI_TRANSITIONS=566} [2024-06-14 13:56:57,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-14 13:56:57,300 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 566 transitions, 8389 flow [2024-06-14 13:56:57,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:57,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:57,300 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, 1, 1] [2024-06-14 13:56:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:56:57,300 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:57,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash 727282739, now seen corresponding path program 15 times [2024-06-14 13:56:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408763909] [2024-06-14 13:56:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:57,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408763909] [2024-06-14 13:56:57,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408763909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:57,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:57,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:57,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287606047] [2024-06-14 13:56:57,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:57,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:57,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:57,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:57,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:57,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 566 transitions, 8389 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:56:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:59,022 INFO L124 PetriNetUnfolderBase]: 3315/5549 cut-off events. [2024-06-14 13:56:59,022 INFO L125 PetriNetUnfolderBase]: For 1009210/1009220 co-relation queries the response was YES. [2024-06-14 13:56:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52798 conditions, 5549 events. 3315/5549 cut-off events. For 1009210/1009220 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37089 event pairs, 770 based on Foata normal form. 18/5567 useless extension candidates. Maximal degree in co-relation 52599. Up to 4805 conditions per place. [2024-06-14 13:56:59,115 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 469 selfloop transitions, 122 changer transitions 0/597 dead transitions. [2024-06-14 13:56:59,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 597 transitions, 9709 flow [2024-06-14 13:56:59,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:59,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 13:56:59,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 13:56:59,117 INFO L175 Difference]: Start difference. First operand has 447 places, 566 transitions, 8389 flow. Second operand 10 states and 216 transitions. [2024-06-14 13:56:59,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 597 transitions, 9709 flow [2024-06-14 13:57:05,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 597 transitions, 9478 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:05,432 INFO L231 Difference]: Finished difference. Result has 450 places, 567 transitions, 8431 flow [2024-06-14 13:57:05,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8158, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8431, PETRI_PLACES=450, PETRI_TRANSITIONS=567} [2024-06-14 13:57:05,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:57:05,449 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 567 transitions, 8431 flow [2024-06-14 13:57:05,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:05,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:05,449 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, 1, 1] [2024-06-14 13:57:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:57:05,449 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:05,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -418181145, now seen corresponding path program 16 times [2024-06-14 13:57:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911703166] [2024-06-14 13:57:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:05,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:05,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:05,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:05,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911703166] [2024-06-14 13:57:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911703166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:05,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:05,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91326285] [2024-06-14 13:57:05,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:05,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:05,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:05,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:05,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 567 transitions, 8431 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:05,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:05,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:05,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:07,248 INFO L124 PetriNetUnfolderBase]: 3409/5694 cut-off events. [2024-06-14 13:57:07,249 INFO L125 PetriNetUnfolderBase]: For 1106576/1106584 co-relation queries the response was YES. [2024-06-14 13:57:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55416 conditions, 5694 events. 3409/5694 cut-off events. For 1106576/1106584 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 38132 event pairs, 813 based on Foata normal form. 16/5709 useless extension candidates. Maximal degree in co-relation 55216. Up to 4725 conditions per place. [2024-06-14 13:57:07,343 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 110 changer transitions 0/602 dead transitions. [2024-06-14 13:57:07,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 602 transitions, 10091 flow [2024-06-14 13:57:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:07,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:57:07,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:57:07,345 INFO L175 Difference]: Start difference. First operand has 450 places, 567 transitions, 8431 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:57:07,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 602 transitions, 10091 flow [2024-06-14 13:57:13,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 9846 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:57:13,184 INFO L231 Difference]: Finished difference. Result has 450 places, 570 transitions, 8507 flow [2024-06-14 13:57:13,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8186, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8507, PETRI_PLACES=450, PETRI_TRANSITIONS=570} [2024-06-14 13:57:13,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:57:13,185 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 570 transitions, 8507 flow [2024-06-14 13:57:13,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:13,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:13,185 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, 1, 1] [2024-06-14 13:57:13,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:57:13,185 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:13,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:13,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1236455827, now seen corresponding path program 17 times [2024-06-14 13:57:13,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:13,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177617388] [2024-06-14 13:57:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:13,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:13,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:13,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177617388] [2024-06-14 13:57:13,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177617388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:13,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:13,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:13,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774281648] [2024-06-14 13:57:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:13,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:13,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 570 transitions, 8507 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:13,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:13,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:13,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:14,962 INFO L124 PetriNetUnfolderBase]: 3437/5738 cut-off events. [2024-06-14 13:57:14,962 INFO L125 PetriNetUnfolderBase]: For 1126653/1126661 co-relation queries the response was YES. [2024-06-14 13:57:15,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56077 conditions, 5738 events. 3437/5738 cut-off events. For 1126653/1126661 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 38535 event pairs, 833 based on Foata normal form. 16/5753 useless extension candidates. Maximal degree in co-relation 55875. Up to 4995 conditions per place. [2024-06-14 13:57:15,055 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 109 changer transitions 0/595 dead transitions. [2024-06-14 13:57:15,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 595 transitions, 9818 flow [2024-06-14 13:57:15,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:57:15,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:57:15,056 INFO L175 Difference]: Start difference. First operand has 450 places, 570 transitions, 8507 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:57:15,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 595 transitions, 9818 flow [2024-06-14 13:57:21,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 595 transitions, 9663 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:57:21,439 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 8608 flow [2024-06-14 13:57:21,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8360, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8608, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-14 13:57:21,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:57:21,439 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 8608 flow [2024-06-14 13:57:21,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:21,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:21,440 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, 1, 1] [2024-06-14 13:57:21,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:57:21,440 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:21,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:21,440 INFO L85 PathProgramCache]: Analyzing trace with hash -568558425, now seen corresponding path program 18 times [2024-06-14 13:57:21,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:21,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391915904] [2024-06-14 13:57:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:21,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:21,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:21,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:21,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391915904] [2024-06-14 13:57:21,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391915904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:21,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:21,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:21,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092100190] [2024-06-14 13:57:21,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:21,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:21,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:21,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:21,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 8608 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:21,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:21,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:21,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:23,297 INFO L124 PetriNetUnfolderBase]: 3457/5778 cut-off events. [2024-06-14 13:57:23,297 INFO L125 PetriNetUnfolderBase]: For 1129612/1129620 co-relation queries the response was YES. [2024-06-14 13:57:23,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56478 conditions, 5778 events. 3457/5778 cut-off events. For 1129612/1129620 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38774 event pairs, 615 based on Foata normal form. 14/5791 useless extension candidates. Maximal degree in co-relation 56274. Up to 4178 conditions per place. [2024-06-14 13:57:23,391 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 474 selfloop transitions, 127 changer transitions 0/607 dead transitions. [2024-06-14 13:57:23,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 607 transitions, 10466 flow [2024-06-14 13:57:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:57:23,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:57:23,393 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 8608 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:57:23,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 607 transitions, 10466 flow [2024-06-14 13:57:29,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 607 transitions, 10247 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:29,628 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 8675 flow [2024-06-14 13:57:29,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8389, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8675, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-14 13:57:29,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:57:29,629 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 8675 flow [2024-06-14 13:57:29,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:29,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:29,629 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, 1, 1] [2024-06-14 13:57:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:57:29,629 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:29,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash -568438269, now seen corresponding path program 13 times [2024-06-14 13:57:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:29,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101850077] [2024-06-14 13:57:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:30,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101850077] [2024-06-14 13:57:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101850077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:30,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047830537] [2024-06-14 13:57:30,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:30,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:30,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:30,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:30,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:30,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:30,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 8675 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:30,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:30,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:30,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:31,657 INFO L124 PetriNetUnfolderBase]: 3444/5756 cut-off events. [2024-06-14 13:57:31,658 INFO L125 PetriNetUnfolderBase]: For 1109000/1109010 co-relation queries the response was YES. [2024-06-14 13:57:31,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56030 conditions, 5756 events. 3444/5756 cut-off events. For 1109000/1109010 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38699 event pairs, 580 based on Foata normal form. 16/5772 useless extension candidates. Maximal degree in co-relation 55825. Up to 4699 conditions per place. [2024-06-14 13:57:31,745 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 501 selfloop transitions, 95 changer transitions 0/602 dead transitions. [2024-06-14 13:57:31,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 602 transitions, 10247 flow [2024-06-14 13:57:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:57:31,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:57:31,747 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 8675 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:57:31,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 602 transitions, 10247 flow [2024-06-14 13:57:38,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 602 transitions, 9567 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 13:57:38,845 INFO L231 Difference]: Finished difference. Result has 454 places, 572 transitions, 8191 flow [2024-06-14 13:57:38,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8191, PETRI_PLACES=454, PETRI_TRANSITIONS=572} [2024-06-14 13:57:38,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:57:38,846 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 572 transitions, 8191 flow [2024-06-14 13:57:38,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:38,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:38,846 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, 1, 1] [2024-06-14 13:57:38,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:57:38,846 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:38,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:38,846 INFO L85 PathProgramCache]: Analyzing trace with hash -568438455, now seen corresponding path program 19 times [2024-06-14 13:57:38,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:38,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755263177] [2024-06-14 13:57:38,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:38,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755263177] [2024-06-14 13:57:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755263177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:39,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:39,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:39,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397175955] [2024-06-14 13:57:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:39,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:39,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 572 transitions, 8191 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:39,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:39,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:39,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:40,691 INFO L124 PetriNetUnfolderBase]: 3431/5739 cut-off events. [2024-06-14 13:57:40,692 INFO L125 PetriNetUnfolderBase]: For 1081900/1081910 co-relation queries the response was YES. [2024-06-14 13:57:40,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53663 conditions, 5739 events. 3431/5739 cut-off events. For 1081900/1081910 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38549 event pairs, 592 based on Foata normal form. 16/5755 useless extension candidates. Maximal degree in co-relation 53462. Up to 5051 conditions per place. [2024-06-14 13:57:40,780 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 534 selfloop transitions, 57 changer transitions 0/597 dead transitions. [2024-06-14 13:57:40,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 597 transitions, 9453 flow [2024-06-14 13:57:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:40,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:57:40,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:57:40,782 INFO L175 Difference]: Start difference. First operand has 454 places, 572 transitions, 8191 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:57:40,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 597 transitions, 9453 flow [2024-06-14 13:57:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 597 transitions, 9168 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:57:48,104 INFO L231 Difference]: Finished difference. Result has 452 places, 572 transitions, 8024 flow [2024-06-14 13:57:48,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7906, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8024, PETRI_PLACES=452, PETRI_TRANSITIONS=572} [2024-06-14 13:57:48,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-14 13:57:48,105 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 572 transitions, 8024 flow [2024-06-14 13:57:48,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:48,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:48,105 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, 1, 1] [2024-06-14 13:57:48,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:57:48,105 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:48,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -302741175, now seen corresponding path program 20 times [2024-06-14 13:57:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795571190] [2024-06-14 13:57:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:48,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:48,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:48,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795571190] [2024-06-14 13:57:48,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795571190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:48,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:48,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982588936] [2024-06-14 13:57:48,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:48,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:48,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:48,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:48,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 572 transitions, 8024 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:48,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:48,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:48,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:49,926 INFO L124 PetriNetUnfolderBase]: 3418/5714 cut-off events. [2024-06-14 13:57:49,927 INFO L125 PetriNetUnfolderBase]: For 1055522/1055532 co-relation queries the response was YES. [2024-06-14 13:57:49,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52494 conditions, 5714 events. 3418/5714 cut-off events. For 1055522/1055532 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38399 event pairs, 783 based on Foata normal form. 16/5726 useless extension candidates. Maximal degree in co-relation 52293. Up to 5055 conditions per place. [2024-06-14 13:57:50,021 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 54 changer transitions 0/598 dead transitions. [2024-06-14 13:57:50,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 598 transitions, 9570 flow [2024-06-14 13:57:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:50,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:50,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:57:50,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:57:50,023 INFO L175 Difference]: Start difference. First operand has 452 places, 572 transitions, 8024 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:57:50,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 598 transitions, 9570 flow [2024-06-14 13:57:56,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 598 transitions, 9450 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:56,342 INFO L231 Difference]: Finished difference. Result has 454 places, 572 transitions, 8016 flow [2024-06-14 13:57:56,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7904, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8016, PETRI_PLACES=454, PETRI_TRANSITIONS=572} [2024-06-14 13:57:56,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:57:56,342 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 572 transitions, 8016 flow [2024-06-14 13:57:56,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:56,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:56,343 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, 1, 1] [2024-06-14 13:57:56,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:57:56,343 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:56,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash -302414559, now seen corresponding path program 14 times [2024-06-14 13:57:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:56,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461484994] [2024-06-14 13:57:56,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:56,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:56,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461484994] [2024-06-14 13:57:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461484994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:56,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:56,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219577419] [2024-06-14 13:57:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:56,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:56,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:56,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 572 transitions, 8016 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:57:56,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:56,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:58,168 INFO L124 PetriNetUnfolderBase]: 3400/5692 cut-off events. [2024-06-14 13:57:58,168 INFO L125 PetriNetUnfolderBase]: For 1027727/1027737 co-relation queries the response was YES. [2024-06-14 13:57:58,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51453 conditions, 5692 events. 3400/5692 cut-off events. For 1027727/1027737 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38313 event pairs, 775 based on Foata normal form. 18/5710 useless extension candidates. Maximal degree in co-relation 51251. Up to 5013 conditions per place. [2024-06-14 13:57:58,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 508 selfloop transitions, 80 changer transitions 0/594 dead transitions. [2024-06-14 13:57:58,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 594 transitions, 9296 flow [2024-06-14 13:57:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:57:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:57:58,259 INFO L175 Difference]: Start difference. First operand has 454 places, 572 transitions, 8016 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:57:58,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 594 transitions, 9296 flow [2024-06-14 13:58:03,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 594 transitions, 9164 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:03,867 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 8054 flow [2024-06-14 13:58:03,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8054, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-14 13:58:03,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:58:03,867 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 8054 flow [2024-06-14 13:58:03,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:03,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:03,868 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, 1, 1] [2024-06-14 13:58:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:58:03,868 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:03,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:03,868 INFO L85 PathProgramCache]: Analyzing trace with hash -302593305, now seen corresponding path program 21 times [2024-06-14 13:58:03,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:03,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364772208] [2024-06-14 13:58:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:03,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:03,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:04,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:04,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364772208] [2024-06-14 13:58:04,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364772208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:04,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:04,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:04,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718509332] [2024-06-14 13:58:04,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:04,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:04,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:04,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:04,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:04,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:04,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 8054 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:04,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:04,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:04,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:05,659 INFO L124 PetriNetUnfolderBase]: 3382/5666 cut-off events. [2024-06-14 13:58:05,659 INFO L125 PetriNetUnfolderBase]: For 986118/986128 co-relation queries the response was YES. [2024-06-14 13:58:05,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 5666 events. 3382/5666 cut-off events. For 986118/986128 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38078 event pairs, 779 based on Foata normal form. 18/5684 useless extension candidates. Maximal degree in co-relation 50223. Up to 5059 conditions per place. [2024-06-14 13:58:05,750 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 49 changer transitions 0/593 dead transitions. [2024-06-14 13:58:05,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 593 transitions, 9324 flow [2024-06-14 13:58:05,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:05,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:05,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:58:05,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:58:05,752 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 8054 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:58:05,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 593 transitions, 9324 flow [2024-06-14 13:58:12,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 593 transitions, 9153 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:12,020 INFO L231 Difference]: Finished difference. Result has 456 places, 572 transitions, 7988 flow [2024-06-14 13:58:12,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7988, PETRI_PLACES=456, PETRI_TRANSITIONS=572} [2024-06-14 13:58:12,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:58:12,021 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 572 transitions, 7988 flow [2024-06-14 13:58:12,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:12,022 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, 1, 1] [2024-06-14 13:58:12,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:58:12,022 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:12,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:12,022 INFO L85 PathProgramCache]: Analyzing trace with hash -302740989, now seen corresponding path program 15 times [2024-06-14 13:58:12,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:12,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5627993] [2024-06-14 13:58:12,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:12,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:12,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:12,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5627993] [2024-06-14 13:58:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5627993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:12,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:12,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:12,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716044140] [2024-06-14 13:58:12,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:12,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:12,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:12,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 572 transitions, 7988 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:12,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:12,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:12,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:13,844 INFO L124 PetriNetUnfolderBase]: 3369/5645 cut-off events. [2024-06-14 13:58:13,845 INFO L125 PetriNetUnfolderBase]: For 942356/942366 co-relation queries the response was YES. [2024-06-14 13:58:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49587 conditions, 5645 events. 3369/5645 cut-off events. For 942356/942366 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37983 event pairs, 734 based on Foata normal form. 16/5659 useless extension candidates. Maximal degree in co-relation 49383. Up to 4906 conditions per place. [2024-06-14 13:58:13,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 508 selfloop transitions, 83 changer transitions 0/597 dead transitions. [2024-06-14 13:58:13,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 597 transitions, 9306 flow [2024-06-14 13:58:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:58:13,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 13:58:13,944 INFO L175 Difference]: Start difference. First operand has 456 places, 572 transitions, 7988 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:58:13,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 597 transitions, 9306 flow [2024-06-14 13:58:19,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 597 transitions, 9203 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:19,354 INFO L231 Difference]: Finished difference. Result has 459 places, 572 transitions, 8057 flow [2024-06-14 13:58:19,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8057, PETRI_PLACES=459, PETRI_TRANSITIONS=572} [2024-06-14 13:58:19,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-14 13:58:19,354 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 572 transitions, 8057 flow [2024-06-14 13:58:19,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:19,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:19,355 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, 1, 1] [2024-06-14 13:58:19,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:58:19,355 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:19,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:19,355 INFO L85 PathProgramCache]: Analyzing trace with hash -172646733, now seen corresponding path program 22 times [2024-06-14 13:58:19,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:19,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843304669] [2024-06-14 13:58:19,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:19,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:19,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:19,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843304669] [2024-06-14 13:58:19,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843304669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:19,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:19,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634795526] [2024-06-14 13:58:19,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:19,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:19,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:19,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:19,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 572 transitions, 8057 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:19,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:19,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:19,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:21,326 INFO L124 PetriNetUnfolderBase]: 3351/5621 cut-off events. [2024-06-14 13:58:21,327 INFO L125 PetriNetUnfolderBase]: For 913477/913487 co-relation queries the response was YES. [2024-06-14 13:58:21,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48638 conditions, 5621 events. 3351/5621 cut-off events. For 913477/913487 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37862 event pairs, 752 based on Foata normal form. 18/5639 useless extension candidates. Maximal degree in co-relation 48433. Up to 4790 conditions per place. [2024-06-14 13:58:21,408 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 498 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2024-06-14 13:58:21,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 602 transitions, 9369 flow [2024-06-14 13:58:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:58:21,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:58:21,409 INFO L175 Difference]: Start difference. First operand has 459 places, 572 transitions, 8057 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:58:21,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 602 transitions, 9369 flow [2024-06-14 13:58:27,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 602 transitions, 9147 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:27,810 INFO L231 Difference]: Finished difference. Result has 458 places, 572 transitions, 8047 flow [2024-06-14 13:58:27,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=458, PETRI_TRANSITIONS=572} [2024-06-14 13:58:27,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:58:27,814 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 572 transitions, 8047 flow [2024-06-14 13:58:27,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:27,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:27,814 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, 1, 1] [2024-06-14 13:58:27,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:58:27,814 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:27,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash -178009113, now seen corresponding path program 23 times [2024-06-14 13:58:27,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:27,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690310017] [2024-06-14 13:58:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:27,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:28,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690310017] [2024-06-14 13:58:28,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690310017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:28,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:28,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:28,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867809000] [2024-06-14 13:58:28,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:28,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:28,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:28,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:28,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:28,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 572 transitions, 8047 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:28,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:28,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:28,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:29,895 INFO L124 PetriNetUnfolderBase]: 3333/5595 cut-off events. [2024-06-14 13:58:29,896 INFO L125 PetriNetUnfolderBase]: For 865179/865189 co-relation queries the response was YES. [2024-06-14 13:58:29,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47582 conditions, 5595 events. 3333/5595 cut-off events. For 865179/865189 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37694 event pairs, 744 based on Foata normal form. 18/5613 useless extension candidates. Maximal degree in co-relation 47376. Up to 4742 conditions per place. [2024-06-14 13:58:29,987 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 99 changer transitions 0/606 dead transitions. [2024-06-14 13:58:29,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 606 transitions, 9377 flow [2024-06-14 13:58:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:29,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:58:29,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:58:29,988 INFO L175 Difference]: Start difference. First operand has 458 places, 572 transitions, 8047 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:58:29,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 606 transitions, 9377 flow [2024-06-14 13:58:35,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 606 transitions, 9154 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:35,417 INFO L231 Difference]: Finished difference. Result has 459 places, 572 transitions, 8039 flow [2024-06-14 13:58:35,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7824, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8039, PETRI_PLACES=459, PETRI_TRANSITIONS=572} [2024-06-14 13:58:35,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-14 13:58:35,432 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 572 transitions, 8039 flow [2024-06-14 13:58:35,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:35,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:35,433 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, 1, 1] [2024-06-14 13:58:35,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:58:35,433 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -177830367, now seen corresponding path program 16 times [2024-06-14 13:58:35,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:35,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457606218] [2024-06-14 13:58:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:35,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:35,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457606218] [2024-06-14 13:58:35,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457606218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:35,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:35,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:35,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589641266] [2024-06-14 13:58:35,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:35,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:35,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:35,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:35,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 572 transitions, 8039 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:35,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:35,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:35,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:37,332 INFO L124 PetriNetUnfolderBase]: 3361/5639 cut-off events. [2024-06-14 13:58:37,332 INFO L125 PetriNetUnfolderBase]: For 865809/865819 co-relation queries the response was YES. [2024-06-14 13:58:37,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47966 conditions, 5639 events. 3361/5639 cut-off events. For 865809/865819 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38024 event pairs, 748 based on Foata normal form. 18/5657 useless extension candidates. Maximal degree in co-relation 47760. Up to 4892 conditions per place. [2024-06-14 13:58:37,425 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 505 selfloop transitions, 83 changer transitions 0/594 dead transitions. [2024-06-14 13:58:37,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 594 transitions, 9348 flow [2024-06-14 13:58:37,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:58:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:58:37,427 INFO L175 Difference]: Start difference. First operand has 459 places, 572 transitions, 8039 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:58:37,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 594 transitions, 9348 flow [2024-06-14 13:58:44,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 594 transitions, 9129 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:58:44,339 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 8037 flow [2024-06-14 13:58:44,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7820, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8037, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-14 13:58:44,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 13:58:44,340 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 8037 flow [2024-06-14 13:58:44,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:44,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:44,340 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, 1, 1] [2024-06-14 13:58:44,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:58:44,340 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:44,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:44,340 INFO L85 PathProgramCache]: Analyzing trace with hash -167105607, now seen corresponding path program 17 times [2024-06-14 13:58:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:44,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411145557] [2024-06-14 13:58:44,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:44,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:44,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:44,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411145557] [2024-06-14 13:58:44,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411145557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:44,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:44,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:44,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419766813] [2024-06-14 13:58:44,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:44,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:44,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:44,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:44,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:44,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:44,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 8037 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:44,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:44,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:44,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:46,165 INFO L124 PetriNetUnfolderBase]: 3376/5668 cut-off events. [2024-06-14 13:58:46,165 INFO L125 PetriNetUnfolderBase]: For 838491/838501 co-relation queries the response was YES. [2024-06-14 13:58:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47814 conditions, 5668 events. 3376/5668 cut-off events. For 838491/838501 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38291 event pairs, 753 based on Foata normal form. 18/5686 useless extension candidates. Maximal degree in co-relation 47609. Up to 4985 conditions per place. [2024-06-14 13:58:46,260 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 509 selfloop transitions, 81 changer transitions 0/596 dead transitions. [2024-06-14 13:58:46,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 596 transitions, 9354 flow [2024-06-14 13:58:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:58:46,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:58:46,261 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 8037 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:58:46,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 596 transitions, 9354 flow [2024-06-14 13:58:50,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 596 transitions, 9176 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:50,874 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8066 flow [2024-06-14 13:58:50,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8066, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-14 13:58:50,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:58:50,875 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8066 flow [2024-06-14 13:58:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:50,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:50,875 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, 1, 1] [2024-06-14 13:58:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:58:50,875 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:50,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -178156797, now seen corresponding path program 18 times [2024-06-14 13:58:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386101382] [2024-06-14 13:58:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:51,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386101382] [2024-06-14 13:58:51,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386101382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:51,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:51,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:51,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569631416] [2024-06-14 13:58:51,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:51,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:51,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:51,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:51,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:51,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8066 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:51,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:51,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:51,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:52,629 INFO L124 PetriNetUnfolderBase]: 3363/5649 cut-off events. [2024-06-14 13:58:52,629 INFO L125 PetriNetUnfolderBase]: For 766826/766836 co-relation queries the response was YES. [2024-06-14 13:58:52,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46729 conditions, 5649 events. 3363/5649 cut-off events. For 766826/766836 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38165 event pairs, 515 based on Foata normal form. 16/5665 useless extension candidates. Maximal degree in co-relation 46525. Up to 4589 conditions per place. [2024-06-14 13:58:52,721 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 496 selfloop transitions, 99 changer transitions 0/601 dead transitions. [2024-06-14 13:58:52,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 601 transitions, 9398 flow [2024-06-14 13:58:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:52,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:58:52,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:58:52,723 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8066 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:58:52,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 601 transitions, 9398 flow [2024-06-14 13:58:57,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 601 transitions, 9217 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:57,456 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8097 flow [2024-06-14 13:58:57,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7885, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8097, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-14 13:58:57,457 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:58:57,457 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8097 flow [2024-06-14 13:58:57,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:57,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:57,458 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, 1, 1] [2024-06-14 13:58:57,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:58:57,458 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:57,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:57,458 INFO L85 PathProgramCache]: Analyzing trace with hash -178156983, now seen corresponding path program 24 times [2024-06-14 13:58:57,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893754420] [2024-06-14 13:58:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:57,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893754420] [2024-06-14 13:58:57,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893754420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:57,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:57,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:57,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327751894] [2024-06-14 13:58:57,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:57,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:57,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:57,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:57,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:57,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:57,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8097 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:58:57,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:57,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:57,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:59,211 INFO L124 PetriNetUnfolderBase]: 3350/5632 cut-off events. [2024-06-14 13:58:59,211 INFO L125 PetriNetUnfolderBase]: For 724171/724181 co-relation queries the response was YES. [2024-06-14 13:58:59,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45999 conditions, 5632 events. 3350/5632 cut-off events. For 724171/724181 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38110 event pairs, 506 based on Foata normal form. 16/5648 useless extension candidates. Maximal degree in co-relation 45795. Up to 4423 conditions per place. [2024-06-14 13:58:59,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 116 changer transitions 0/611 dead transitions. [2024-06-14 13:58:59,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 611 transitions, 9463 flow [2024-06-14 13:58:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:58:59,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:58:59,301 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8097 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:58:59,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 611 transitions, 9463 flow [2024-06-14 13:59:04,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 611 transitions, 9243 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:04,555 INFO L231 Difference]: Finished difference. Result has 458 places, 574 transitions, 8117 flow [2024-06-14 13:59:04,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7877, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8117, PETRI_PLACES=458, PETRI_TRANSITIONS=574} [2024-06-14 13:59:04,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:59:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 574 transitions, 8117 flow [2024-06-14 13:59:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:04,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:04,556 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, 1, 1] [2024-06-14 13:59:04,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:59:04,556 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:04,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:04,556 INFO L85 PathProgramCache]: Analyzing trace with hash 82586425, now seen corresponding path program 19 times [2024-06-14 13:59:04,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:04,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767801822] [2024-06-14 13:59:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:04,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:04,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:04,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767801822] [2024-06-14 13:59:04,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767801822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:04,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:04,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:04,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319025313] [2024-06-14 13:59:04,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:04,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:04,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:05,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:05,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 574 transitions, 8117 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:05,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:05,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:05,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:06,273 INFO L124 PetriNetUnfolderBase]: 3378/5672 cut-off events. [2024-06-14 13:59:06,273 INFO L125 PetriNetUnfolderBase]: For 719386/719388 co-relation queries the response was YES. [2024-06-14 13:59:06,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46236 conditions, 5672 events. 3378/5672 cut-off events. For 719386/719388 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 38369 event pairs, 783 based on Foata normal form. 10/5681 useless extension candidates. Maximal degree in co-relation 46034. Up to 4991 conditions per place. [2024-06-14 13:59:06,364 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 100 changer transitions 0/590 dead transitions. [2024-06-14 13:59:06,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 590 transitions, 9410 flow [2024-06-14 13:59:06,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:59:06,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 13:59:06,365 INFO L175 Difference]: Start difference. First operand has 458 places, 574 transitions, 8117 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:59:06,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 590 transitions, 9410 flow [2024-06-14 13:59:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 590 transitions, 9166 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 13:59:10,773 INFO L231 Difference]: Finished difference. Result has 456 places, 575 transitions, 8119 flow [2024-06-14 13:59:10,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7873, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8119, PETRI_PLACES=456, PETRI_TRANSITIONS=575} [2024-06-14 13:59:10,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:59:10,773 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 575 transitions, 8119 flow [2024-06-14 13:59:10,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:10,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:10,774 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, 1, 1] [2024-06-14 13:59:10,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:59:10,774 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:10,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1636830303, now seen corresponding path program 20 times [2024-06-14 13:59:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:10,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879090845] [2024-06-14 13:59:10,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:10,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:11,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:11,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879090845] [2024-06-14 13:59:11,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879090845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:11,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:11,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:11,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134532749] [2024-06-14 13:59:11,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:11,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:11,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:11,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:11,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:11,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:11,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 575 transitions, 8119 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:11,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:11,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:11,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:12,537 INFO L124 PetriNetUnfolderBase]: 3439/5773 cut-off events. [2024-06-14 13:59:12,537 INFO L125 PetriNetUnfolderBase]: For 751739/751749 co-relation queries the response was YES. [2024-06-14 13:59:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47583 conditions, 5773 events. 3439/5773 cut-off events. For 751739/751749 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39075 event pairs, 752 based on Foata normal form. 18/5791 useless extension candidates. Maximal degree in co-relation 47382. Up to 4744 conditions per place. [2024-06-14 13:59:12,628 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 487 selfloop transitions, 112 changer transitions 0/605 dead transitions. [2024-06-14 13:59:12,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 605 transitions, 9793 flow [2024-06-14 13:59:12,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:12,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:59:12,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:59:12,629 INFO L175 Difference]: Start difference. First operand has 456 places, 575 transitions, 8119 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:59:12,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 605 transitions, 9793 flow [2024-06-14 13:59:17,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 605 transitions, 9576 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:17,520 INFO L231 Difference]: Finished difference. Result has 461 places, 577 transitions, 8238 flow [2024-06-14 13:59:17,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8238, PETRI_PLACES=461, PETRI_TRANSITIONS=577} [2024-06-14 13:59:17,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-14 13:59:17,520 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 577 transitions, 8238 flow [2024-06-14 13:59:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:17,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:17,521 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, 1, 1] [2024-06-14 13:59:17,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:59:17,521 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:17,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash 79729465, now seen corresponding path program 21 times [2024-06-14 13:59:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:17,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408093708] [2024-06-14 13:59:17,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:17,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:17,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:17,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408093708] [2024-06-14 13:59:17,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408093708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:17,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:17,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:17,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8184325] [2024-06-14 13:59:17,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:17,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:17,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:17,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:17,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:17,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 577 transitions, 8238 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:17,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:17,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:17,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:19,280 INFO L124 PetriNetUnfolderBase]: 3454/5800 cut-off events. [2024-06-14 13:59:19,281 INFO L125 PetriNetUnfolderBase]: For 751634/751636 co-relation queries the response was YES. [2024-06-14 13:59:19,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47893 conditions, 5800 events. 3454/5800 cut-off events. For 751634/751636 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39439 event pairs, 801 based on Foata normal form. 10/5809 useless extension candidates. Maximal degree in co-relation 47690. Up to 4999 conditions per place. [2024-06-14 13:59:19,375 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 102 changer transitions 0/597 dead transitions. [2024-06-14 13:59:19,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 597 transitions, 9599 flow [2024-06-14 13:59:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:59:19,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:59:19,376 INFO L175 Difference]: Start difference. First operand has 461 places, 577 transitions, 8238 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:59:19,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 597 transitions, 9599 flow [2024-06-14 13:59:24,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 597 transitions, 9393 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:24,461 INFO L231 Difference]: Finished difference. Result has 461 places, 578 transitions, 8275 flow [2024-06-14 13:59:24,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8032, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8275, PETRI_PLACES=461, PETRI_TRANSITIONS=578} [2024-06-14 13:59:24,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-14 13:59:24,462 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 578 transitions, 8275 flow [2024-06-14 13:59:24,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:24,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:24,462 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, 1, 1] [2024-06-14 13:59:24,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:59:24,462 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:24,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:24,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1633973343, now seen corresponding path program 22 times [2024-06-14 13:59:24,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:24,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455988306] [2024-06-14 13:59:24,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:24,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:24,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455988306] [2024-06-14 13:59:24,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455988306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:24,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:24,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:24,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423633539] [2024-06-14 13:59:24,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:24,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:24,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:24,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:24,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:24,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:24,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 578 transitions, 8275 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:24,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:24,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:24,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:26,256 INFO L124 PetriNetUnfolderBase]: 3482/5846 cut-off events. [2024-06-14 13:59:26,256 INFO L125 PetriNetUnfolderBase]: For 753179/753189 co-relation queries the response was YES. [2024-06-14 13:59:26,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48253 conditions, 5846 events. 3482/5846 cut-off events. For 753179/753189 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39821 event pairs, 793 based on Foata normal form. 18/5864 useless extension candidates. Maximal degree in co-relation 48050. Up to 5123 conditions per place. [2024-06-14 13:59:26,350 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 490 selfloop transitions, 106 changer transitions 0/602 dead transitions. [2024-06-14 13:59:26,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 602 transitions, 9614 flow [2024-06-14 13:59:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 13:59:26,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 13:59:26,351 INFO L175 Difference]: Start difference. First operand has 461 places, 578 transitions, 8275 flow. Second operand 9 states and 193 transitions. [2024-06-14 13:59:26,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 602 transitions, 9614 flow [2024-06-14 13:59:31,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 602 transitions, 9398 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:31,245 INFO L231 Difference]: Finished difference. Result has 465 places, 579 transitions, 8322 flow [2024-06-14 13:59:31,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8059, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8322, PETRI_PLACES=465, PETRI_TRANSITIONS=579} [2024-06-14 13:59:31,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 13:59:31,246 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 579 transitions, 8322 flow [2024-06-14 13:59:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:31,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:31,246 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, 1, 1] [2024-06-14 13:59:31,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:59:31,247 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:31,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:31,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1862053239, now seen corresponding path program 25 times [2024-06-14 13:59:31,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:31,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655530883] [2024-06-14 13:59:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:31,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655530883] [2024-06-14 13:59:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655530883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:31,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:31,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:31,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47330037] [2024-06-14 13:59:31,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:31,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:31,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:31,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:31,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:31,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 579 transitions, 8322 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:31,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:31,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:31,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:33,017 INFO L124 PetriNetUnfolderBase]: 3464/5820 cut-off events. [2024-06-14 13:59:33,018 INFO L125 PetriNetUnfolderBase]: For 707505/707515 co-relation queries the response was YES. [2024-06-14 13:59:33,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47160 conditions, 5820 events. 3464/5820 cut-off events. For 707505/707515 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39715 event pairs, 771 based on Foata normal form. 18/5838 useless extension candidates. Maximal degree in co-relation 46956. Up to 4905 conditions per place. [2024-06-14 13:59:33,116 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 488 selfloop transitions, 123 changer transitions 0/617 dead transitions. [2024-06-14 13:59:33,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 617 transitions, 9684 flow [2024-06-14 13:59:33,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:33,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:59:33,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:59:33,117 INFO L175 Difference]: Start difference. First operand has 465 places, 579 transitions, 8322 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:59:33,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 617 transitions, 9684 flow [2024-06-14 13:59:38,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 617 transitions, 9458 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:38,139 INFO L231 Difference]: Finished difference. Result has 467 places, 579 transitions, 8356 flow [2024-06-14 13:59:38,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8356, PETRI_PLACES=467, PETRI_TRANSITIONS=579} [2024-06-14 13:59:38,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 13:59:38,139 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 579 transitions, 8356 flow [2024-06-14 13:59:38,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:38,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:38,140 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, 1, 1] [2024-06-14 13:59:38,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:59:38,140 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:38,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1861874493, now seen corresponding path program 23 times [2024-06-14 13:59:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:38,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975952905] [2024-06-14 13:59:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:38,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:38,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:38,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975952905] [2024-06-14 13:59:38,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975952905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:38,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:38,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:38,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190897455] [2024-06-14 13:59:38,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:38,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:38,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:38,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:38,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:38,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:38,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 579 transitions, 8356 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:38,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:38,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:39,866 INFO L124 PetriNetUnfolderBase]: 3446/5794 cut-off events. [2024-06-14 13:59:39,866 INFO L125 PetriNetUnfolderBase]: For 656466/656476 co-relation queries the response was YES. [2024-06-14 13:59:39,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46045 conditions, 5794 events. 3446/5794 cut-off events. For 656466/656476 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39474 event pairs, 777 based on Foata normal form. 18/5812 useless extension candidates. Maximal degree in co-relation 45840. Up to 5039 conditions per place. [2024-06-14 13:59:39,961 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 489 selfloop transitions, 111 changer transitions 0/606 dead transitions. [2024-06-14 13:59:39,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 606 transitions, 9672 flow [2024-06-14 13:59:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:59:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:59:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:59:39,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:59:39,962 INFO L175 Difference]: Start difference. First operand has 467 places, 579 transitions, 8356 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:59:39,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 606 transitions, 9672 flow [2024-06-14 13:59:44,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 606 transitions, 9397 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:59:44,537 INFO L231 Difference]: Finished difference. Result has 467 places, 579 transitions, 8314 flow [2024-06-14 13:59:44,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8081, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8314, PETRI_PLACES=467, PETRI_TRANSITIONS=579} [2024-06-14 13:59:44,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 13:59:44,538 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 579 transitions, 8314 flow [2024-06-14 13:59:44,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:44,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:44,538 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, 1, 1] [2024-06-14 13:59:44,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 13:59:44,538 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:44,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1862201109, now seen corresponding path program 26 times [2024-06-14 13:59:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:44,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480349587] [2024-06-14 13:59:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:44,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:44,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480349587] [2024-06-14 13:59:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480349587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:44,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:44,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633931442] [2024-06-14 13:59:44,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:44,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:44,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 579 transitions, 8314 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:44,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:44,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:44,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:46,334 INFO L124 PetriNetUnfolderBase]: 3433/5769 cut-off events. [2024-06-14 13:59:46,335 INFO L125 PetriNetUnfolderBase]: For 581700/581710 co-relation queries the response was YES. [2024-06-14 13:59:46,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44871 conditions, 5769 events. 3433/5769 cut-off events. For 581700/581710 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39282 event pairs, 705 based on Foata normal form. 16/5779 useless extension candidates. Maximal degree in co-relation 44667. Up to 4683 conditions per place. [2024-06-14 13:59:46,427 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 483 selfloop transitions, 135 changer transitions 0/624 dead transitions. [2024-06-14 13:59:46,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 624 transitions, 9726 flow [2024-06-14 13:59:46,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:59:46,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:59:46,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 13:59:46,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-14 13:59:46,428 INFO L175 Difference]: Start difference. First operand has 467 places, 579 transitions, 8314 flow. Second operand 10 states and 233 transitions. [2024-06-14 13:59:46,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 624 transitions, 9726 flow [2024-06-14 13:59:50,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 624 transitions, 9472 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:59:50,499 INFO L231 Difference]: Finished difference. Result has 468 places, 579 transitions, 8340 flow [2024-06-14 13:59:50,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8060, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8340, PETRI_PLACES=468, PETRI_TRANSITIONS=579} [2024-06-14 13:59:50,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-14 13:59:50,499 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 579 transitions, 8340 flow [2024-06-14 13:59:50,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:50,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:50,500 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, 1, 1] [2024-06-14 13:59:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 13:59:50,500 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:50,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1862200923, now seen corresponding path program 24 times [2024-06-14 13:59:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367900662] [2024-06-14 13:59:50,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:50,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:50,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:50,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367900662] [2024-06-14 13:59:50,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367900662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:50,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:50,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:50,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750038974] [2024-06-14 13:59:50,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:50,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:50,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:50,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 579 transitions, 8340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:50,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:50,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:50,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:52,245 INFO L124 PetriNetUnfolderBase]: 3420/5743 cut-off events. [2024-06-14 13:59:52,246 INFO L125 PetriNetUnfolderBase]: For 544353/544363 co-relation queries the response was YES. [2024-06-14 13:59:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44158 conditions, 5743 events. 3420/5743 cut-off events. For 544353/544363 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39064 event pairs, 726 based on Foata normal form. 16/5746 useless extension candidates. Maximal degree in co-relation 43953. Up to 4765 conditions per place. [2024-06-14 13:59:52,346 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 127 changer transitions 0/612 dead transitions. [2024-06-14 13:59:52,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 612 transitions, 9708 flow [2024-06-14 13:59:52,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:59:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:59:52,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 13:59:52,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 13:59:52,347 INFO L175 Difference]: Start difference. First operand has 468 places, 579 transitions, 8340 flow. Second operand 10 states and 219 transitions. [2024-06-14 13:59:52,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 612 transitions, 9708 flow [2024-06-14 13:59:56,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 612 transitions, 9410 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-14 13:59:56,796 INFO L231 Difference]: Finished difference. Result has 466 places, 579 transitions, 8306 flow [2024-06-14 13:59:56,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8042, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8306, PETRI_PLACES=466, PETRI_TRANSITIONS=579} [2024-06-14 13:59:56,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-14 13:59:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 579 transitions, 8306 flow [2024-06-14 13:59:56,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:56,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:56,797 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, 1, 1] [2024-06-14 13:59:56,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 13:59:56,797 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:56,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:56,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766869, now seen corresponding path program 27 times [2024-06-14 13:59:56,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:56,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394029102] [2024-06-14 13:59:56,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:56,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:57,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:57,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394029102] [2024-06-14 13:59:57,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394029102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:57,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:57,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:57,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377003696] [2024-06-14 13:59:57,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:57,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:57,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:57,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:57,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:57,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:57,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 579 transitions, 8306 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 13:59:57,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:57,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:58,615 INFO L124 PetriNetUnfolderBase]: 3407/5737 cut-off events. [2024-06-14 13:59:58,615 INFO L125 PetriNetUnfolderBase]: For 487364/487374 co-relation queries the response was YES. [2024-06-14 13:59:58,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43108 conditions, 5737 events. 3407/5737 cut-off events. For 487364/487374 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39044 event pairs, 452 based on Foata normal form. 16/5753 useless extension candidates. Maximal degree in co-relation 42905. Up to 3965 conditions per place. [2024-06-14 13:59:58,712 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 154 changer transitions 0/621 dead transitions. [2024-06-14 13:59:58,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 621 transitions, 9704 flow [2024-06-14 13:59:58,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:59:58,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:59:58,714 INFO L175 Difference]: Start difference. First operand has 466 places, 579 transitions, 8306 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:59:58,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 621 transitions, 9704 flow [2024-06-14 14:00:02,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 621 transitions, 9393 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-14 14:00:02,404 INFO L231 Difference]: Finished difference. Result has 463 places, 579 transitions, 8311 flow [2024-06-14 14:00:02,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8311, PETRI_PLACES=463, PETRI_TRANSITIONS=579} [2024-06-14 14:00:02,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-14 14:00:02,404 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 579 transitions, 8311 flow [2024-06-14 14:00:02,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:02,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:02,405 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, 1, 1] [2024-06-14 14:00:02,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:00:02,405 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:02,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:02,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766683, now seen corresponding path program 25 times [2024-06-14 14:00:02,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:02,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336273208] [2024-06-14 14:00:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:02,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:02,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:02,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:02,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336273208] [2024-06-14 14:00:02,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336273208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:02,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:02,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356428353] [2024-06-14 14:00:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:02,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:02,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:02,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:02,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:02,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 579 transitions, 8311 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:02,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:02,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:02,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:04,207 INFO L124 PetriNetUnfolderBase]: 3427/5769 cut-off events. [2024-06-14 14:00:04,207 INFO L125 PetriNetUnfolderBase]: For 474032/474042 co-relation queries the response was YES. [2024-06-14 14:00:04,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43283 conditions, 5769 events. 3427/5769 cut-off events. For 474032/474042 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39287 event pairs, 480 based on Foata normal form. 16/5785 useless extension candidates. Maximal degree in co-relation 43083. Up to 3941 conditions per place. [2024-06-14 14:00:04,298 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 156 changer transitions 0/617 dead transitions. [2024-06-14 14:00:04,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 617 transitions, 10016 flow [2024-06-14 14:00:04,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 14:00:04,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:00:04,299 INFO L175 Difference]: Start difference. First operand has 463 places, 579 transitions, 8311 flow. Second operand 9 states and 207 transitions. [2024-06-14 14:00:04,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 617 transitions, 10016 flow [2024-06-14 14:00:07,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 617 transitions, 9635 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 14:00:07,641 INFO L231 Difference]: Finished difference. Result has 461 places, 580 transitions, 8297 flow [2024-06-14 14:00:07,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8297, PETRI_PLACES=461, PETRI_TRANSITIONS=580} [2024-06-14 14:00:07,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-14 14:00:07,642 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 580 transitions, 8297 flow [2024-06-14 14:00:07,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:07,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:07,642 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, 1, 1] [2024-06-14 14:00:07,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:00:07,642 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:07,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1950529533, now seen corresponding path program 26 times [2024-06-14 14:00:07,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:07,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380312236] [2024-06-14 14:00:07,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:07,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:08,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:08,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380312236] [2024-06-14 14:00:08,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380312236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:08,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:08,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:08,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373865768] [2024-06-14 14:00:08,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:08,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:08,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:08,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:08,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 580 transitions, 8297 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:08,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:08,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:09,435 INFO L124 PetriNetUnfolderBase]: 3414/5750 cut-off events. [2024-06-14 14:00:09,435 INFO L125 PetriNetUnfolderBase]: For 411249/411259 co-relation queries the response was YES. [2024-06-14 14:00:09,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42286 conditions, 5750 events. 3414/5750 cut-off events. For 411249/411259 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39174 event pairs, 481 based on Foata normal form. 16/5766 useless extension candidates. Maximal degree in co-relation 42087. Up to 3935 conditions per place. [2024-06-14 14:00:09,527 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 159 changer transitions 0/612 dead transitions. [2024-06-14 14:00:09,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 612 transitions, 9687 flow [2024-06-14 14:00:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:09,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:00:09,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 14:00:09,528 INFO L175 Difference]: Start difference. First operand has 461 places, 580 transitions, 8297 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:00:09,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 612 transitions, 9687 flow [2024-06-14 14:00:12,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 612 transitions, 9357 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-14 14:00:12,522 INFO L231 Difference]: Finished difference. Result has 458 places, 580 transitions, 8293 flow [2024-06-14 14:00:12,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8293, PETRI_PLACES=458, PETRI_TRANSITIONS=580} [2024-06-14 14:00:12,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 14:00:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 580 transitions, 8293 flow [2024-06-14 14:00:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:12,523 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, 1, 1] [2024-06-14 14:00:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:00:12,523 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:12,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 638633651, now seen corresponding path program 1 times [2024-06-14 14:00:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:12,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926645856] [2024-06-14 14:00:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:12,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:12,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926645856] [2024-06-14 14:00:12,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926645856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:12,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:12,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:12,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424241168] [2024-06-14 14:00:12,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:12,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:12,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:12,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:12,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 580 transitions, 8293 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:12,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:12,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:12,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:14,312 INFO L124 PetriNetUnfolderBase]: 3434/5786 cut-off events. [2024-06-14 14:00:14,312 INFO L125 PetriNetUnfolderBase]: For 398489/398499 co-relation queries the response was YES. [2024-06-14 14:00:14,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42265 conditions, 5786 events. 3434/5786 cut-off events. For 398489/398499 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 39510 event pairs, 704 based on Foata normal form. 16/5802 useless extension candidates. Maximal degree in co-relation 42071. Up to 4276 conditions per place. [2024-06-14 14:00:14,395 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 484 selfloop transitions, 133 changer transitions 0/623 dead transitions. [2024-06-14 14:00:14,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 623 transitions, 9965 flow [2024-06-14 14:00:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:14,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:00:14,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 14:00:14,396 INFO L175 Difference]: Start difference. First operand has 458 places, 580 transitions, 8293 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:00:14,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 623 transitions, 9965 flow [2024-06-14 14:00:17,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 623 transitions, 9608 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 14:00:17,573 INFO L231 Difference]: Finished difference. Result has 457 places, 581 transitions, 8230 flow [2024-06-14 14:00:17,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7940, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8230, PETRI_PLACES=457, PETRI_TRANSITIONS=581} [2024-06-14 14:00:17,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-14 14:00:17,573 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 581 transitions, 8230 flow [2024-06-14 14:00:17,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:17,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:17,574 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, 1, 1] [2024-06-14 14:00:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:00:17,574 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:17,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 638932553, now seen corresponding path program 1 times [2024-06-14 14:00:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565852037] [2024-06-14 14:00:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:17,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565852037] [2024-06-14 14:00:17,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565852037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:17,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:17,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:17,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324417147] [2024-06-14 14:00:17,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:17,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:17,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:17,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:17,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:18,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:18,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 581 transitions, 8230 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:18,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:18,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:18,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:19,396 INFO L124 PetriNetUnfolderBase]: 3541/5963 cut-off events. [2024-06-14 14:00:19,396 INFO L125 PetriNetUnfolderBase]: For 439295/439305 co-relation queries the response was YES. [2024-06-14 14:00:19,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43806 conditions, 5963 events. 3541/5963 cut-off events. For 439295/439305 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 40925 event pairs, 742 based on Foata normal form. 16/5979 useless extension candidates. Maximal degree in co-relation 43613. Up to 4945 conditions per place. [2024-06-14 14:00:19,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 516 selfloop transitions, 97 changer transitions 0/619 dead transitions. [2024-06-14 14:00:19,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 619 transitions, 9929 flow [2024-06-14 14:00:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:19,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:00:19,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 14:00:19,481 INFO L175 Difference]: Start difference. First operand has 457 places, 581 transitions, 8230 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:00:19,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 619 transitions, 9929 flow [2024-06-14 14:00:22,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 619 transitions, 9550 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:22,591 INFO L231 Difference]: Finished difference. Result has 461 places, 589 transitions, 8220 flow [2024-06-14 14:00:22,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7861, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8220, PETRI_PLACES=461, PETRI_TRANSITIONS=589} [2024-06-14 14:00:22,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-14 14:00:22,592 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 589 transitions, 8220 flow [2024-06-14 14:00:22,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:22,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:22,592 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, 1, 1] [2024-06-14 14:00:22,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:00:22,592 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:22,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 638932181, now seen corresponding path program 2 times [2024-06-14 14:00:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286500614] [2024-06-14 14:00:22,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:22,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:22,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286500614] [2024-06-14 14:00:22,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286500614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:22,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:22,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:22,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470423136] [2024-06-14 14:00:22,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:22,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:22,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:22,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:23,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:23,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 589 transitions, 8220 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:23,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:23,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:23,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:24,460 INFO L124 PetriNetUnfolderBase]: 3561/5999 cut-off events. [2024-06-14 14:00:24,461 INFO L125 PetriNetUnfolderBase]: For 446464/446474 co-relation queries the response was YES. [2024-06-14 14:00:24,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43467 conditions, 5999 events. 3561/5999 cut-off events. For 446464/446474 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41241 event pairs, 717 based on Foata normal form. 16/6015 useless extension candidates. Maximal degree in co-relation 43272. Up to 4402 conditions per place. [2024-06-14 14:00:24,546 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 486 selfloop transitions, 138 changer transitions 0/630 dead transitions. [2024-06-14 14:00:24,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 630 transitions, 9913 flow [2024-06-14 14:00:24,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 14:00:24,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 14:00:24,547 INFO L175 Difference]: Start difference. First operand has 461 places, 589 transitions, 8220 flow. Second operand 9 states and 210 transitions. [2024-06-14 14:00:24,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 630 transitions, 9913 flow [2024-06-14 14:00:27,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 630 transitions, 9727 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:27,690 INFO L231 Difference]: Finished difference. Result has 464 places, 590 transitions, 8330 flow [2024-06-14 14:00:27,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8036, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8330, PETRI_PLACES=464, PETRI_TRANSITIONS=590} [2024-06-14 14:00:27,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 14:00:27,691 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 590 transitions, 8330 flow [2024-06-14 14:00:27,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:27,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:27,691 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, 1, 1] [2024-06-14 14:00:27,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:00:27,692 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:27,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:27,692 INFO L85 PathProgramCache]: Analyzing trace with hash 727498313, now seen corresponding path program 2 times [2024-06-14 14:00:27,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14827174] [2024-06-14 14:00:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:27,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:28,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:28,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14827174] [2024-06-14 14:00:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14827174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:28,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042276862] [2024-06-14 14:00:28,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:28,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:28,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:28,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:28,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:28,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:28,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 590 transitions, 8330 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:28,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:28,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:28,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:29,545 INFO L124 PetriNetUnfolderBase]: 3627/6099 cut-off events. [2024-06-14 14:00:29,546 INFO L125 PetriNetUnfolderBase]: For 498413/498423 co-relation queries the response was YES. [2024-06-14 14:00:29,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45415 conditions, 6099 events. 3627/6099 cut-off events. For 498413/498423 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41963 event pairs, 808 based on Foata normal form. 16/6115 useless extension candidates. Maximal degree in co-relation 45220. Up to 5297 conditions per place. [2024-06-14 14:00:29,633 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 522 selfloop transitions, 90 changer transitions 0/618 dead transitions. [2024-06-14 14:00:29,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 618 transitions, 9965 flow [2024-06-14 14:00:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 14:00:29,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 14:00:29,635 INFO L175 Difference]: Start difference. First operand has 464 places, 590 transitions, 8330 flow. Second operand 10 states and 213 transitions. [2024-06-14 14:00:29,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 618 transitions, 9965 flow [2024-06-14 14:00:33,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 618 transitions, 9751 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:33,401 INFO L231 Difference]: Finished difference. Result has 469 places, 593 transitions, 8384 flow [2024-06-14 14:00:33,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8117, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8384, PETRI_PLACES=469, PETRI_TRANSITIONS=593} [2024-06-14 14:00:33,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-14 14:00:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 593 transitions, 8384 flow [2024-06-14 14:00:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:33,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:33,402 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, 1, 1] [2024-06-14 14:00:33,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:00:33,402 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:33,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash 640810223, now seen corresponding path program 3 times [2024-06-14 14:00:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:33,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054692681] [2024-06-14 14:00:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:33,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054692681] [2024-06-14 14:00:33,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054692681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509311051] [2024-06-14 14:00:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:33,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:33,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:33,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:33,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 593 transitions, 8384 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:33,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:33,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:33,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:35,321 INFO L124 PetriNetUnfolderBase]: 3609/6075 cut-off events. [2024-06-14 14:00:35,322 INFO L125 PetriNetUnfolderBase]: For 469309/469319 co-relation queries the response was YES. [2024-06-14 14:00:35,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44312 conditions, 6075 events. 3609/6075 cut-off events. For 469309/469319 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41840 event pairs, 816 based on Foata normal form. 18/6093 useless extension candidates. Maximal degree in co-relation 44115. Up to 5351 conditions per place. [2024-06-14 14:00:35,411 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 523 selfloop transitions, 84 changer transitions 0/613 dead transitions. [2024-06-14 14:00:35,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 613 transitions, 9690 flow [2024-06-14 14:00:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 14:00:35,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 14:00:35,412 INFO L175 Difference]: Start difference. First operand has 469 places, 593 transitions, 8384 flow. Second operand 9 states and 192 transitions. [2024-06-14 14:00:35,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 613 transitions, 9690 flow [2024-06-14 14:00:38,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 613 transitions, 9551 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:38,801 INFO L231 Difference]: Finished difference. Result has 471 places, 593 transitions, 8423 flow [2024-06-14 14:00:38,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8245, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=509, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8423, PETRI_PLACES=471, PETRI_TRANSITIONS=593} [2024-06-14 14:00:38,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-14 14:00:38,802 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 593 transitions, 8423 flow [2024-06-14 14:00:38,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:38,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:38,802 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, 1, 1] [2024-06-14 14:00:38,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:00:38,802 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:38,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 727497941, now seen corresponding path program 3 times [2024-06-14 14:00:38,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:38,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997086520] [2024-06-14 14:00:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:38,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:39,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:39,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997086520] [2024-06-14 14:00:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997086520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:39,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297812258] [2024-06-14 14:00:39,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:39,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:39,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:39,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:39,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 593 transitions, 8423 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:39,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:39,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:40,667 INFO L124 PetriNetUnfolderBase]: 3629/6107 cut-off events. [2024-06-14 14:00:40,667 INFO L125 PetriNetUnfolderBase]: For 456267/456277 co-relation queries the response was YES. [2024-06-14 14:00:40,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44524 conditions, 6107 events. 3629/6107 cut-off events. For 456267/456277 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 42114 event pairs, 812 based on Foata normal form. 16/6119 useless extension candidates. Maximal degree in co-relation 44326. Up to 5205 conditions per place. [2024-06-14 14:00:40,757 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 491 selfloop transitions, 130 changer transitions 0/627 dead transitions. [2024-06-14 14:00:40,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 627 transitions, 9829 flow [2024-06-14 14:00:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:00:40,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 14:00:40,758 INFO L175 Difference]: Start difference. First operand has 471 places, 593 transitions, 8423 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:00:40,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 627 transitions, 9829 flow [2024-06-14 14:00:43,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 627 transitions, 9667 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:43,748 INFO L231 Difference]: Finished difference. Result has 474 places, 594 transitions, 8542 flow [2024-06-14 14:00:43,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8261, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8542, PETRI_PLACES=474, PETRI_TRANSITIONS=594} [2024-06-14 14:00:43,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 14:00:43,749 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 594 transitions, 8542 flow [2024-06-14 14:00:43,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:43,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:43,749 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, 1, 1] [2024-06-14 14:00:43,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:00:43,750 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:43,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:43,750 INFO L85 PathProgramCache]: Analyzing trace with hash -172283289, now seen corresponding path program 4 times [2024-06-14 14:00:43,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:43,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898797148] [2024-06-14 14:00:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:43,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:44,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:44,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898797148] [2024-06-14 14:00:44,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898797148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:44,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:44,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:44,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274249755] [2024-06-14 14:00:44,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:44,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:44,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:44,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:44,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:44,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:44,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 594 transitions, 8542 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:44,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:44,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:44,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:45,608 INFO L124 PetriNetUnfolderBase]: 3657/6155 cut-off events. [2024-06-14 14:00:45,608 INFO L125 PetriNetUnfolderBase]: For 477951/477961 co-relation queries the response was YES. [2024-06-14 14:00:45,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45184 conditions, 6155 events. 3657/6155 cut-off events. For 477951/477961 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 42520 event pairs, 826 based on Foata normal form. 18/6173 useless extension candidates. Maximal degree in co-relation 44985. Up to 5464 conditions per place. [2024-06-14 14:00:45,698 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 546 selfloop transitions, 61 changer transitions 0/613 dead transitions. [2024-06-14 14:00:45,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 613 transitions, 9873 flow [2024-06-14 14:00:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:00:45,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:00:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:00:45,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 14:00:45,700 INFO L175 Difference]: Start difference. First operand has 474 places, 594 transitions, 8542 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:00:45,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 613 transitions, 9873 flow [2024-06-14 14:00:49,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 613 transitions, 9612 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:00:49,543 INFO L231 Difference]: Finished difference. Result has 473 places, 595 transitions, 8444 flow [2024-06-14 14:00:49,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8281, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8444, PETRI_PLACES=473, PETRI_TRANSITIONS=595} [2024-06-14 14:00:49,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-14 14:00:49,543 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 595 transitions, 8444 flow [2024-06-14 14:00:49,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:49,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:49,544 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, 1, 1] [2024-06-14 14:00:49,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:00:49,544 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:49,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash -166920909, now seen corresponding path program 5 times [2024-06-14 14:00:49,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:49,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929792112] [2024-06-14 14:00:49,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:49,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929792112] [2024-06-14 14:00:49,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929792112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:49,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:49,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:49,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630788959] [2024-06-14 14:00:49,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:49,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:49,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:49,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:49,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:50,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:50,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 595 transitions, 8444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:50,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:50,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:50,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:51,428 INFO L124 PetriNetUnfolderBase]: 3685/6203 cut-off events. [2024-06-14 14:00:51,429 INFO L125 PetriNetUnfolderBase]: For 486062/486072 co-relation queries the response was YES. [2024-06-14 14:00:51,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45485 conditions, 6203 events. 3685/6203 cut-off events. For 486062/486072 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 42871 event pairs, 832 based on Foata normal form. 18/6221 useless extension candidates. Maximal degree in co-relation 45285. Up to 5508 conditions per place. [2024-06-14 14:00:51,522 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 61 changer transitions 0/615 dead transitions. [2024-06-14 14:00:51,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 615 transitions, 9783 flow [2024-06-14 14:00:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:00:51,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 14:00:51,524 INFO L175 Difference]: Start difference. First operand has 473 places, 595 transitions, 8444 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:00:51,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 615 transitions, 9783 flow [2024-06-14 14:00:54,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 615 transitions, 9655 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:00:54,865 INFO L231 Difference]: Finished difference. Result has 476 places, 596 transitions, 8481 flow [2024-06-14 14:00:54,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8316, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8481, PETRI_PLACES=476, PETRI_TRANSITIONS=596} [2024-06-14 14:00:54,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-14 14:00:54,866 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 596 transitions, 8481 flow [2024-06-14 14:00:54,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:54,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:54,866 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, 1, 1] [2024-06-14 14:00:54,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:00:54,866 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:54,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash -172431531, now seen corresponding path program 4 times [2024-06-14 14:00:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:54,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6617193] [2024-06-14 14:00:54,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:54,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:55,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6617193] [2024-06-14 14:00:55,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6617193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:55,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:55,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953807734] [2024-06-14 14:00:55,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:55,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:55,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 596 transitions, 8481 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:55,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:55,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:55,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:56,774 INFO L124 PetriNetUnfolderBase]: 3672/6184 cut-off events. [2024-06-14 14:00:56,774 INFO L125 PetriNetUnfolderBase]: For 441033/441043 co-relation queries the response was YES. [2024-06-14 14:00:56,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44714 conditions, 6184 events. 3672/6184 cut-off events. For 441033/441043 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 42813 event pairs, 718 based on Foata normal form. 16/6200 useless extension candidates. Maximal degree in co-relation 44513. Up to 4939 conditions per place. [2024-06-14 14:00:56,866 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 515 selfloop transitions, 108 changer transitions 0/629 dead transitions. [2024-06-14 14:00:56,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 629 transitions, 9879 flow [2024-06-14 14:00:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:00:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:00:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:00:56,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 14:00:56,868 INFO L175 Difference]: Start difference. First operand has 476 places, 596 transitions, 8481 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:00:56,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 629 transitions, 9879 flow [2024-06-14 14:00:59,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 629 transitions, 9745 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:59,822 INFO L231 Difference]: Finished difference. Result has 477 places, 596 transitions, 8571 flow [2024-06-14 14:00:59,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8347, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8571, PETRI_PLACES=477, PETRI_TRANSITIONS=596} [2024-06-14 14:00:59,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 14:00:59,823 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 596 transitions, 8571 flow [2024-06-14 14:00:59,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:00:59,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:59,823 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, 1, 1] [2024-06-14 14:00:59,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:00:59,824 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:59,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:59,824 INFO L85 PathProgramCache]: Analyzing trace with hash -172431159, now seen corresponding path program 6 times [2024-06-14 14:00:59,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:59,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763097278] [2024-06-14 14:00:59,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:59,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:00,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:00,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763097278] [2024-06-14 14:01:00,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763097278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:00,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:00,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:00,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917823552] [2024-06-14 14:01:00,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:00,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:00,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:00,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 596 transitions, 8571 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:00,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:00,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:00,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:01,776 INFO L124 PetriNetUnfolderBase]: 3717/6255 cut-off events. [2024-06-14 14:01:01,776 INFO L125 PetriNetUnfolderBase]: For 450259/450269 co-relation queries the response was YES. [2024-06-14 14:01:01,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45414 conditions, 6255 events. 3717/6255 cut-off events. For 450259/450269 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 43165 event pairs, 756 based on Foata normal form. 16/6271 useless extension candidates. Maximal degree in co-relation 45212. Up to 5389 conditions per place. [2024-06-14 14:01:01,871 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 550 selfloop transitions, 69 changer transitions 0/625 dead transitions. [2024-06-14 14:01:01,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 625 transitions, 10027 flow [2024-06-14 14:01:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:01,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:01:01,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 14:01:01,873 INFO L175 Difference]: Start difference. First operand has 477 places, 596 transitions, 8571 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:01:01,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 625 transitions, 10027 flow [2024-06-14 14:01:05,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 625 transitions, 9719 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:05,932 INFO L231 Difference]: Finished difference. Result has 477 places, 601 transitions, 8536 flow [2024-06-14 14:01:05,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8274, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8536, PETRI_PLACES=477, PETRI_TRANSITIONS=601} [2024-06-14 14:01:05,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 14:01:05,932 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 601 transitions, 8536 flow [2024-06-14 14:01:05,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:05,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:05,933 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, 1, 1] [2024-06-14 14:01:05,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:01:05,933 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:05,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:05,933 INFO L85 PathProgramCache]: Analyzing trace with hash -166705893, now seen corresponding path program 1 times [2024-06-14 14:01:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:05,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563954618] [2024-06-14 14:01:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:05,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:06,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:06,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563954618] [2024-06-14 14:01:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563954618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:06,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164201594] [2024-06-14 14:01:06,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:06,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:06,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:06,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:06,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 601 transitions, 8536 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:06,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:06,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:06,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:07,862 INFO L124 PetriNetUnfolderBase]: 3753/6319 cut-off events. [2024-06-14 14:01:07,862 INFO L125 PetriNetUnfolderBase]: For 444347/444357 co-relation queries the response was YES. [2024-06-14 14:01:07,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 6319 events. 3753/6319 cut-off events. For 444347/444357 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 43814 event pairs, 743 based on Foata normal form. 16/6335 useless extension candidates. Maximal degree in co-relation 45377. Up to 5382 conditions per place. [2024-06-14 14:01:07,959 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 531 selfloop transitions, 94 changer transitions 0/631 dead transitions. [2024-06-14 14:01:07,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 631 transitions, 9978 flow [2024-06-14 14:01:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:01:07,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:01:07,960 INFO L175 Difference]: Start difference. First operand has 477 places, 601 transitions, 8536 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:01:07,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 631 transitions, 9978 flow [2024-06-14 14:01:10,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 631 transitions, 9845 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:10,659 INFO L231 Difference]: Finished difference. Result has 481 places, 606 transitions, 8699 flow [2024-06-14 14:01:10,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8403, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8699, PETRI_PLACES=481, PETRI_TRANSITIONS=606} [2024-06-14 14:01:10,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-14 14:01:10,659 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 606 transitions, 8699 flow [2024-06-14 14:01:10,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:10,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:10,660 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, 1, 1] [2024-06-14 14:01:10,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:01:10,660 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:10,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:10,660 INFO L85 PathProgramCache]: Analyzing trace with hash -166705707, now seen corresponding path program 1 times [2024-06-14 14:01:10,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:10,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323788781] [2024-06-14 14:01:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:11,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:11,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323788781] [2024-06-14 14:01:11,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323788781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:11,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:11,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:11,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324900787] [2024-06-14 14:01:11,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:11,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:11,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:11,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:11,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:11,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:11,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 606 transitions, 8699 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:11,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:11,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:12,740 INFO L124 PetriNetUnfolderBase]: 3773/6351 cut-off events. [2024-06-14 14:01:12,740 INFO L125 PetriNetUnfolderBase]: For 445288/445298 co-relation queries the response was YES. [2024-06-14 14:01:12,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45981 conditions, 6351 events. 3773/6351 cut-off events. For 445288/445298 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43947 event pairs, 802 based on Foata normal form. 16/6367 useless extension candidates. Maximal degree in co-relation 45777. Up to 5482 conditions per place. [2024-06-14 14:01:12,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 548 selfloop transitions, 75 changer transitions 0/629 dead transitions. [2024-06-14 14:01:12,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 629 transitions, 10087 flow [2024-06-14 14:01:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:12,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:01:12,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 14:01:12,848 INFO L175 Difference]: Start difference. First operand has 481 places, 606 transitions, 8699 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:01:12,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 629 transitions, 10087 flow [2024-06-14 14:01:15,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 629 transitions, 9917 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:15,890 INFO L231 Difference]: Finished difference. Result has 483 places, 607 transitions, 8715 flow [2024-06-14 14:01:15,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8529, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8715, PETRI_PLACES=483, PETRI_TRANSITIONS=607} [2024-06-14 14:01:15,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 14:01:15,890 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 607 transitions, 8715 flow [2024-06-14 14:01:15,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:15,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:15,891 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, 1, 1] [2024-06-14 14:01:15,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:01:15,891 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash 463974589, now seen corresponding path program 2 times [2024-06-14 14:01:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915098685] [2024-06-14 14:01:15,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:16,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:16,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915098685] [2024-06-14 14:01:16,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915098685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:16,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:16,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:16,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659539375] [2024-06-14 14:01:16,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:16,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:16,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:16,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 607 transitions, 8715 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:16,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:17,850 INFO L124 PetriNetUnfolderBase]: 3793/6383 cut-off events. [2024-06-14 14:01:17,850 INFO L125 PetriNetUnfolderBase]: For 446535/446545 co-relation queries the response was YES. [2024-06-14 14:01:17,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46194 conditions, 6383 events. 3793/6383 cut-off events. For 446535/446545 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 44170 event pairs, 806 based on Foata normal form. 16/6399 useless extension candidates. Maximal degree in co-relation 45990. Up to 5736 conditions per place. [2024-06-14 14:01:17,951 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 578 selfloop transitions, 40 changer transitions 0/624 dead transitions. [2024-06-14 14:01:17,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 624 transitions, 10041 flow [2024-06-14 14:01:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:17,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 14:01:17,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 14:01:17,953 INFO L175 Difference]: Start difference. First operand has 483 places, 607 transitions, 8715 flow. Second operand 7 states and 151 transitions. [2024-06-14 14:01:17,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 624 transitions, 10041 flow [2024-06-14 14:01:20,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 624 transitions, 9874 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:20,883 INFO L231 Difference]: Finished difference. Result has 483 places, 608 transitions, 8662 flow [2024-06-14 14:01:20,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8548, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8662, PETRI_PLACES=483, PETRI_TRANSITIONS=608} [2024-06-14 14:01:20,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 14:01:20,884 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 608 transitions, 8662 flow [2024-06-14 14:01:20,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:20,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:20,884 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, 1, 1] [2024-06-14 14:01:20,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:01:20,884 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:20,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:20,885 INFO L85 PathProgramCache]: Analyzing trace with hash 463854619, now seen corresponding path program 3 times [2024-06-14 14:01:20,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:20,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344421995] [2024-06-14 14:01:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:20,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344421995] [2024-06-14 14:01:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344421995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:21,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440024485] [2024-06-14 14:01:21,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:21,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:21,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:21,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 608 transitions, 8662 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:21,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:21,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:21,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:22,777 INFO L124 PetriNetUnfolderBase]: 3813/6417 cut-off events. [2024-06-14 14:01:22,777 INFO L125 PetriNetUnfolderBase]: For 445763/445765 co-relation queries the response was YES. [2024-06-14 14:01:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46254 conditions, 6417 events. 3813/6417 cut-off events. For 445763/445765 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 44440 event pairs, 839 based on Foata normal form. 8/6424 useless extension candidates. Maximal degree in co-relation 46050. Up to 5046 conditions per place. [2024-06-14 14:01:22,877 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 502 selfloop transitions, 122 changer transitions 0/630 dead transitions. [2024-06-14 14:01:22,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 630 transitions, 10090 flow [2024-06-14 14:01:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:01:22,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 14:01:22,893 INFO L175 Difference]: Start difference. First operand has 483 places, 608 transitions, 8662 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:01:22,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 630 transitions, 10090 flow [2024-06-14 14:01:26,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 630 transitions, 9890 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:26,306 INFO L231 Difference]: Finished difference. Result has 483 places, 609 transitions, 8742 flow [2024-06-14 14:01:26,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8462, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8742, PETRI_PLACES=483, PETRI_TRANSITIONS=609} [2024-06-14 14:01:26,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 14:01:26,307 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 609 transitions, 8742 flow [2024-06-14 14:01:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 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) [2024-06-14 14:01:26,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:26,307 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, 1, 1] [2024-06-14 14:01:26,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:01:26,307 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:26,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:26,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2040804551, now seen corresponding path program 27 times [2024-06-14 14:01:26,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:26,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602267703] [2024-06-14 14:01:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:26,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602267703] [2024-06-14 14:01:26,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602267703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:26,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:26,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:01:26,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644157144] [2024-06-14 14:01:26,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:26,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:01:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:01:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:01:26,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:26,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 609 transitions, 8742 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:26,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:26,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:28,353 INFO L124 PetriNetUnfolderBase]: 3841/6459 cut-off events. [2024-06-14 14:01:28,353 INFO L125 PetriNetUnfolderBase]: For 467807/467809 co-relation queries the response was YES. [2024-06-14 14:01:28,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46696 conditions, 6459 events. 3841/6459 cut-off events. For 467807/467809 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 44806 event pairs, 845 based on Foata normal form. 10/6469 useless extension candidates. Maximal degree in co-relation 46493. Up to 5767 conditions per place. [2024-06-14 14:01:28,456 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 69 changer transitions 0/639 dead transitions. [2024-06-14 14:01:28,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 639 transitions, 10224 flow [2024-06-14 14:01:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:01:28,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:01:28,457 INFO L175 Difference]: Start difference. First operand has 483 places, 609 transitions, 8742 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:01:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 639 transitions, 10224 flow [2024-06-14 14:01:31,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 639 transitions, 9964 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:31,838 INFO L231 Difference]: Finished difference. Result has 487 places, 610 transitions, 8662 flow [2024-06-14 14:01:31,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8482, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8662, PETRI_PLACES=487, PETRI_TRANSITIONS=610} [2024-06-14 14:01:31,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 14:01:31,839 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 610 transitions, 8662 flow [2024-06-14 14:01:31,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:31,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:31,839 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, 1, 1] [2024-06-14 14:01:31,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:01:31,840 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:31,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:31,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2019255751, now seen corresponding path program 28 times [2024-06-14 14:01:31,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:31,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045941894] [2024-06-14 14:01:31,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:31,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:32,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:32,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045941894] [2024-06-14 14:01:32,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045941894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:32,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:32,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:32,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922323029] [2024-06-14 14:01:32,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:32,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:32,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:32,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:32,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 610 transitions, 8662 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:32,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:32,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:32,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:33,906 INFO L124 PetriNetUnfolderBase]: 3869/6503 cut-off events. [2024-06-14 14:01:33,906 INFO L125 PetriNetUnfolderBase]: For 474518/474520 co-relation queries the response was YES. [2024-06-14 14:01:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46855 conditions, 6503 events. 3869/6503 cut-off events. For 474518/474520 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 45210 event pairs, 849 based on Foata normal form. 10/6513 useless extension candidates. Maximal degree in co-relation 46651. Up to 5755 conditions per place. [2024-06-14 14:01:34,013 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 511 selfloop transitions, 119 changer transitions 0/636 dead transitions. [2024-06-14 14:01:34,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 636 transitions, 10069 flow [2024-06-14 14:01:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 14:01:34,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 14:01:34,014 INFO L175 Difference]: Start difference. First operand has 487 places, 610 transitions, 8662 flow. Second operand 10 states and 211 transitions. [2024-06-14 14:01:34,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 636 transitions, 10069 flow [2024-06-14 14:01:37,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 636 transitions, 9921 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:37,218 INFO L231 Difference]: Finished difference. Result has 490 places, 611 transitions, 8793 flow [2024-06-14 14:01:37,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8514, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8793, PETRI_PLACES=490, PETRI_TRANSITIONS=611} [2024-06-14 14:01:37,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-14 14:01:37,219 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 611 transitions, 8793 flow [2024-06-14 14:01:37,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:37,219 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, 1, 1] [2024-06-14 14:01:37,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:01:37,220 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:37,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1903964581, now seen corresponding path program 29 times [2024-06-14 14:01:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:37,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178152290] [2024-06-14 14:01:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:37,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:37,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:37,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178152290] [2024-06-14 14:01:37,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178152290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:37,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:37,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:37,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498823198] [2024-06-14 14:01:37,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:37,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:37,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:37,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:37,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:37,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 611 transitions, 8793 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:37,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:37,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:39,427 INFO L124 PetriNetUnfolderBase]: 3897/6547 cut-off events. [2024-06-14 14:01:39,427 INFO L125 PetriNetUnfolderBase]: For 483235/483237 co-relation queries the response was YES. [2024-06-14 14:01:39,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47383 conditions, 6547 events. 3897/6547 cut-off events. For 483235/483237 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 45539 event pairs, 855 based on Foata normal form. 10/6557 useless extension candidates. Maximal degree in co-relation 47178. Up to 5922 conditions per place. [2024-06-14 14:01:39,537 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 588 selfloop transitions, 43 changer transitions 0/637 dead transitions. [2024-06-14 14:01:39,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 637 transitions, 10204 flow [2024-06-14 14:01:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 14:01:39,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 14:01:39,538 INFO L175 Difference]: Start difference. First operand has 490 places, 611 transitions, 8793 flow. Second operand 10 states and 208 transitions. [2024-06-14 14:01:39,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 637 transitions, 10204 flow [2024-06-14 14:01:42,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 637 transitions, 9951 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:42,928 INFO L231 Difference]: Finished difference. Result has 492 places, 612 transitions, 8669 flow [2024-06-14 14:01:42,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8540, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8669, PETRI_PLACES=492, PETRI_TRANSITIONS=612} [2024-06-14 14:01:42,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-14 14:01:42,929 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 612 transitions, 8669 flow [2024-06-14 14:01:42,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:42,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:42,929 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, 1, 1] [2024-06-14 14:01:42,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:01:42,930 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:42,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2022112711, now seen corresponding path program 30 times [2024-06-14 14:01:42,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:42,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899059781] [2024-06-14 14:01:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:42,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:43,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:43,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899059781] [2024-06-14 14:01:43,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899059781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:43,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:43,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:01:43,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836080742] [2024-06-14 14:01:43,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:01:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:01:43,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:01:43,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:43,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 612 transitions, 8669 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:43,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:43,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:43,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:45,009 INFO L124 PetriNetUnfolderBase]: 3912/6572 cut-off events. [2024-06-14 14:01:45,009 INFO L125 PetriNetUnfolderBase]: For 475523/475525 co-relation queries the response was YES. [2024-06-14 14:01:45,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47196 conditions, 6572 events. 3912/6572 cut-off events. For 475523/475525 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 45698 event pairs, 852 based on Foata normal form. 10/6582 useless extension candidates. Maximal degree in co-relation 46990. Up to 5684 conditions per place. [2024-06-14 14:01:45,129 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 514 selfloop transitions, 122 changer transitions 0/642 dead transitions. [2024-06-14 14:01:45,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 642 transitions, 10152 flow [2024-06-14 14:01:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 14:01:45,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 14:01:45,130 INFO L175 Difference]: Start difference. First operand has 492 places, 612 transitions, 8669 flow. Second operand 10 states and 214 transitions. [2024-06-14 14:01:45,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 642 transitions, 10152 flow [2024-06-14 14:01:49,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 642 transitions, 10049 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:49,281 INFO L231 Difference]: Finished difference. Result has 494 places, 613 transitions, 8854 flow [2024-06-14 14:01:49,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8566, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8854, PETRI_PLACES=494, PETRI_TRANSITIONS=613} [2024-06-14 14:01:49,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 14:01:49,282 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 613 transitions, 8854 flow [2024-06-14 14:01:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:49,282 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, 1, 1] [2024-06-14 14:01:49,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:01:49,282 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:49,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:49,283 INFO L85 PathProgramCache]: Analyzing trace with hash -827762871, now seen corresponding path program 7 times [2024-06-14 14:01:49,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:49,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770043142] [2024-06-14 14:01:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:49,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770043142] [2024-06-14 14:01:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770043142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:49,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:49,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:01:49,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542941138] [2024-06-14 14:01:49,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:49,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:01:49,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:49,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:01:49,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:01:49,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:49,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 613 transitions, 8854 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:49,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:49,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:51,391 INFO L124 PetriNetUnfolderBase]: 3998/6714 cut-off events. [2024-06-14 14:01:51,391 INFO L125 PetriNetUnfolderBase]: For 555281/555291 co-relation queries the response was YES. [2024-06-14 14:01:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49951 conditions, 6714 events. 3998/6714 cut-off events. For 555281/555291 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 46832 event pairs, 808 based on Foata normal form. 16/6730 useless extension candidates. Maximal degree in co-relation 49744. Up to 5673 conditions per place. [2024-06-14 14:01:51,510 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 566 selfloop transitions, 71 changer transitions 0/643 dead transitions. [2024-06-14 14:01:51,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 643 transitions, 10571 flow [2024-06-14 14:01:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 14:01:51,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 14:01:51,511 INFO L175 Difference]: Start difference. First operand has 494 places, 613 transitions, 8854 flow. Second operand 8 states and 178 transitions. [2024-06-14 14:01:51,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 643 transitions, 10571 flow [2024-06-14 14:01:55,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 643 transitions, 10307 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:55,291 INFO L231 Difference]: Finished difference. Result has 495 places, 616 transitions, 8847 flow [2024-06-14 14:01:55,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8590, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8847, PETRI_PLACES=495, PETRI_TRANSITIONS=616} [2024-06-14 14:01:55,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-14 14:01:55,292 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 616 transitions, 8847 flow [2024-06-14 14:01:55,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:55,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:55,292 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, 1, 1] [2024-06-14 14:01:55,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:01:55,292 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:55,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash -473084121, now seen corresponding path program 8 times [2024-06-14 14:01:55,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:55,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574902238] [2024-06-14 14:01:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:55,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:55,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:55,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574902238] [2024-06-14 14:01:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574902238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:55,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:55,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:01:55,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83079095] [2024-06-14 14:01:55,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:55,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:01:55,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:01:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:01:55,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:55,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 616 transitions, 8847 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:55,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:55,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:55,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:57,610 INFO L124 PetriNetUnfolderBase]: 4051/6797 cut-off events. [2024-06-14 14:01:57,610 INFO L125 PetriNetUnfolderBase]: For 605837/605839 co-relation queries the response was YES. [2024-06-14 14:01:57,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51443 conditions, 6797 events. 4051/6797 cut-off events. For 605837/605839 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 47377 event pairs, 848 based on Foata normal form. 8/6805 useless extension candidates. Maximal degree in co-relation 51234. Up to 5259 conditions per place. [2024-06-14 14:01:57,737 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 531 selfloop transitions, 123 changer transitions 0/660 dead transitions. [2024-06-14 14:01:57,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 660 transitions, 10654 flow [2024-06-14 14:01:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:01:57,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 14:01:57,739 INFO L175 Difference]: Start difference. First operand has 495 places, 616 transitions, 8847 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:01:57,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 660 transitions, 10654 flow [2024-06-14 14:02:01,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 660 transitions, 10537 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:01,375 INFO L231 Difference]: Finished difference. Result has 500 places, 618 transitions, 9044 flow [2024-06-14 14:02:01,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8732, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9044, PETRI_PLACES=500, PETRI_TRANSITIONS=618} [2024-06-14 14:02:01,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-14 14:02:01,376 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 618 transitions, 9044 flow [2024-06-14 14:02:01,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:01,377 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, 1, 1] [2024-06-14 14:02:01,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:02:01,377 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:01,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1127202491, now seen corresponding path program 9 times [2024-06-14 14:02:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930001934] [2024-06-14 14:02:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:01,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:01,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:01,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:01,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930001934] [2024-06-14 14:02:01,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930001934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:01,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:01,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:01,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448659897] [2024-06-14 14:02:01,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:01,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:01,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:01,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:01,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 618 transitions, 9044 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:01,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:03,621 INFO L124 PetriNetUnfolderBase]: 4079/6841 cut-off events. [2024-06-14 14:02:03,622 INFO L125 PetriNetUnfolderBase]: For 624415/624417 co-relation queries the response was YES. [2024-06-14 14:02:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52171 conditions, 6841 events. 4079/6841 cut-off events. For 624415/624417 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 47882 event pairs, 941 based on Foata normal form. 10/6851 useless extension candidates. Maximal degree in co-relation 51961. Up to 6105 conditions per place. [2024-06-14 14:02:03,738 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 101 changer transitions 0/652 dead transitions. [2024-06-14 14:02:03,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 652 transitions, 10495 flow [2024-06-14 14:02:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:02:03,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 14:02:03,739 INFO L175 Difference]: Start difference. First operand has 500 places, 618 transitions, 9044 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:02:03,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 652 transitions, 10495 flow [2024-06-14 14:02:08,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 652 transitions, 10339 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:08,240 INFO L231 Difference]: Finished difference. Result has 506 places, 619 transitions, 9129 flow [2024-06-14 14:02:08,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8888, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9129, PETRI_PLACES=506, PETRI_TRANSITIONS=619} [2024-06-14 14:02:08,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-14 14:02:08,241 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 619 transitions, 9129 flow [2024-06-14 14:02:08,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:08,241 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, 1, 1] [2024-06-14 14:02:08,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:02:08,241 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:08,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:08,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1331356749, now seen corresponding path program 10 times [2024-06-14 14:02:08,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681493547] [2024-06-14 14:02:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:08,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:08,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681493547] [2024-06-14 14:02:08,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681493547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:08,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:08,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:08,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561366721] [2024-06-14 14:02:08,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:08,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:08,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:08,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 619 transitions, 9129 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:08,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:08,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:10,705 INFO L124 PetriNetUnfolderBase]: 4107/6885 cut-off events. [2024-06-14 14:02:10,705 INFO L125 PetriNetUnfolderBase]: For 634019/634021 co-relation queries the response was YES. [2024-06-14 14:02:10,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52726 conditions, 6885 events. 4107/6885 cut-off events. For 634019/634021 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 48205 event pairs, 939 based on Foata normal form. 10/6895 useless extension candidates. Maximal degree in co-relation 52514. Up to 6037 conditions per place. [2024-06-14 14:02:10,812 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 547 selfloop transitions, 104 changer transitions 0/657 dead transitions. [2024-06-14 14:02:10,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 657 transitions, 10646 flow [2024-06-14 14:02:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:10,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 14:02:10,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 14:02:10,813 INFO L175 Difference]: Start difference. First operand has 506 places, 619 transitions, 9129 flow. Second operand 12 states and 254 transitions. [2024-06-14 14:02:10,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 657 transitions, 10646 flow [2024-06-14 14:02:15,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 657 transitions, 10429 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:15,017 INFO L231 Difference]: Finished difference. Result has 508 places, 620 transitions, 9160 flow [2024-06-14 14:02:15,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8912, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9160, PETRI_PLACES=508, PETRI_TRANSITIONS=620} [2024-06-14 14:02:15,018 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 14:02:15,018 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 620 transitions, 9160 flow [2024-06-14 14:02:15,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:15,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:15,018 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, 1, 1] [2024-06-14 14:02:15,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:02:15,018 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:15,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1261150391, now seen corresponding path program 11 times [2024-06-14 14:02:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977982189] [2024-06-14 14:02:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:15,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:15,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:15,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977982189] [2024-06-14 14:02:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977982189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:15,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951984659] [2024-06-14 14:02:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:15,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:15,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:15,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:15,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 620 transitions, 9160 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:15,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:15,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:15,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:17,611 INFO L124 PetriNetUnfolderBase]: 4127/6923 cut-off events. [2024-06-14 14:02:17,611 INFO L125 PetriNetUnfolderBase]: For 628781/628791 co-relation queries the response was YES. [2024-06-14 14:02:17,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53031 conditions, 6923 events. 4127/6923 cut-off events. For 628781/628791 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 48610 event pairs, 953 based on Foata normal form. 16/6939 useless extension candidates. Maximal degree in co-relation 52818. Up to 6192 conditions per place. [2024-06-14 14:02:17,724 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 582 selfloop transitions, 51 changer transitions 0/639 dead transitions. [2024-06-14 14:02:17,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 639 transitions, 10523 flow [2024-06-14 14:02:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:17,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-14 14:02:17,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:02:17,725 INFO L175 Difference]: Start difference. First operand has 508 places, 620 transitions, 9160 flow. Second operand 7 states and 154 transitions. [2024-06-14 14:02:17,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 639 transitions, 10523 flow [2024-06-14 14:02:21,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 639 transitions, 10297 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:21,972 INFO L231 Difference]: Finished difference. Result has 505 places, 621 transitions, 9075 flow [2024-06-14 14:02:21,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8934, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9075, PETRI_PLACES=505, PETRI_TRANSITIONS=621} [2024-06-14 14:02:21,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 14:02:21,973 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 621 transitions, 9075 flow [2024-06-14 14:02:21,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:21,983 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, 1, 1] [2024-06-14 14:02:21,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:02:21,983 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:21,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1260734681, now seen corresponding path program 12 times [2024-06-14 14:02:21,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:21,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010643831] [2024-06-14 14:02:21,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:21,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:22,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:22,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010643831] [2024-06-14 14:02:22,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010643831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:22,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:22,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:22,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158594181] [2024-06-14 14:02:22,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:22,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:22,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:22,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:22,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:22,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 621 transitions, 9075 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:22,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:22,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:22,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:24,655 INFO L124 PetriNetUnfolderBase]: 4147/6951 cut-off events. [2024-06-14 14:02:24,655 INFO L125 PetriNetUnfolderBase]: For 637190/637192 co-relation queries the response was YES. [2024-06-14 14:02:24,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53176 conditions, 6951 events. 4147/6951 cut-off events. For 637190/637192 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48713 event pairs, 941 based on Foata normal form. 8/6959 useless extension candidates. Maximal degree in co-relation 52962. Up to 5975 conditions per place. [2024-06-14 14:02:24,774 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 545 selfloop transitions, 109 changer transitions 0/660 dead transitions. [2024-06-14 14:02:24,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 660 transitions, 10608 flow [2024-06-14 14:02:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:02:24,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-14 14:02:24,775 INFO L175 Difference]: Start difference. First operand has 505 places, 621 transitions, 9075 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:02:24,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 660 transitions, 10608 flow [2024-06-14 14:02:29,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 660 transitions, 10492 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:29,295 INFO L231 Difference]: Finished difference. Result has 510 places, 622 transitions, 9219 flow [2024-06-14 14:02:29,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8959, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9219, PETRI_PLACES=510, PETRI_TRANSITIONS=622} [2024-06-14 14:02:29,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 14:02:29,296 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 622 transitions, 9219 flow [2024-06-14 14:02:29,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:29,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:29,296 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, 1, 1] [2024-06-14 14:02:29,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:02:29,297 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:29,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:29,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1480824039, now seen corresponding path program 13 times [2024-06-14 14:02:29,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:29,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429094363] [2024-06-14 14:02:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:29,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:29,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:29,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429094363] [2024-06-14 14:02:29,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429094363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:29,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:29,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:29,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467549976] [2024-06-14 14:02:29,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:29,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:29,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:29,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:29,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:29,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:29,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 622 transitions, 9219 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:29,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:29,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:29,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:32,104 INFO L124 PetriNetUnfolderBase]: 4134/6938 cut-off events. [2024-06-14 14:02:32,105 INFO L125 PetriNetUnfolderBase]: For 592169/592179 co-relation queries the response was YES. [2024-06-14 14:02:32,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52406 conditions, 6938 events. 4134/6938 cut-off events. For 592169/592179 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48749 event pairs, 879 based on Foata normal form. 16/6954 useless extension candidates. Maximal degree in co-relation 52192. Up to 6031 conditions per place. [2024-06-14 14:02:32,223 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 578 selfloop transitions, 64 changer transitions 0/648 dead transitions. [2024-06-14 14:02:32,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 648 transitions, 10888 flow [2024-06-14 14:02:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:32,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:02:32,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 14:02:32,224 INFO L175 Difference]: Start difference. First operand has 510 places, 622 transitions, 9219 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:02:32,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 648 transitions, 10888 flow [2024-06-14 14:02:36,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 648 transitions, 10646 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:36,572 INFO L231 Difference]: Finished difference. Result has 509 places, 623 transitions, 9154 flow [2024-06-14 14:02:36,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8977, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9154, PETRI_PLACES=509, PETRI_TRANSITIONS=623} [2024-06-14 14:02:36,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-14 14:02:36,573 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 623 transitions, 9154 flow [2024-06-14 14:02:36,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:36,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:36,573 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, 1, 1] [2024-06-14 14:02:36,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:02:36,573 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:36,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1224471399, now seen corresponding path program 14 times [2024-06-14 14:02:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864282509] [2024-06-14 14:02:36,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:36,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:37,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:37,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864282509] [2024-06-14 14:02:37,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864282509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:37,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:37,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72324002] [2024-06-14 14:02:37,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:37,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:37,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:37,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 623 transitions, 9154 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:37,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:37,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:39,323 INFO L124 PetriNetUnfolderBase]: 4116/6912 cut-off events. [2024-06-14 14:02:39,323 INFO L125 PetriNetUnfolderBase]: For 554491/554501 co-relation queries the response was YES. [2024-06-14 14:02:39,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51144 conditions, 6912 events. 4116/6912 cut-off events. For 554491/554501 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48613 event pairs, 982 based on Foata normal form. 18/6930 useless extension candidates. Maximal degree in co-relation 50928. Up to 6174 conditions per place. [2024-06-14 14:02:39,441 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 584 selfloop transitions, 50 changer transitions 0/640 dead transitions. [2024-06-14 14:02:39,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 640 transitions, 10508 flow [2024-06-14 14:02:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 14:02:39,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 14:02:39,443 INFO L175 Difference]: Start difference. First operand has 509 places, 623 transitions, 9154 flow. Second operand 6 states and 137 transitions. [2024-06-14 14:02:39,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 640 transitions, 10508 flow [2024-06-14 14:02:43,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 640 transitions, 10259 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:43,175 INFO L231 Difference]: Finished difference. Result has 508 places, 623 transitions, 9018 flow [2024-06-14 14:02:43,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8905, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9018, PETRI_PLACES=508, PETRI_TRANSITIONS=623} [2024-06-14 14:02:43,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 14:02:43,176 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 623 transitions, 9018 flow [2024-06-14 14:02:43,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:43,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:43,176 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, 1, 1] [2024-06-14 14:02:43,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 14:02:43,177 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1490020809, now seen corresponding path program 15 times [2024-06-14 14:02:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336783688] [2024-06-14 14:02:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336783688] [2024-06-14 14:02:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336783688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:43,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505253707] [2024-06-14 14:02:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:43,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:43,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 623 transitions, 9018 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:43,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:43,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:43,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:45,716 INFO L124 PetriNetUnfolderBase]: 4103/6893 cut-off events. [2024-06-14 14:02:45,717 INFO L125 PetriNetUnfolderBase]: For 496938/496948 co-relation queries the response was YES. [2024-06-14 14:02:45,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49676 conditions, 6893 events. 4103/6893 cut-off events. For 496938/496948 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48478 event pairs, 871 based on Foata normal form. 16/6909 useless extension candidates. Maximal degree in co-relation 49461. Up to 6133 conditions per place. [2024-06-14 14:02:45,831 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 590 selfloop transitions, 52 changer transitions 0/648 dead transitions. [2024-06-14 14:02:45,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 648 transitions, 10388 flow [2024-06-14 14:02:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:45,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:45,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 14:02:45,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 14:02:45,833 INFO L175 Difference]: Start difference. First operand has 508 places, 623 transitions, 9018 flow. Second operand 7 states and 160 transitions. [2024-06-14 14:02:45,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 648 transitions, 10388 flow [2024-06-14 14:02:49,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 648 transitions, 10272 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:49,706 INFO L231 Difference]: Finished difference. Result has 510 places, 623 transitions, 9010 flow [2024-06-14 14:02:49,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8902, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9010, PETRI_PLACES=510, PETRI_TRANSITIONS=623} [2024-06-14 14:02:49,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 14:02:49,707 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 623 transitions, 9010 flow [2024-06-14 14:02:49,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:49,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:49,707 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, 1, 1] [2024-06-14 14:02:49,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 14:02:49,708 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:49,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:49,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1623968709, now seen corresponding path program 16 times [2024-06-14 14:02:49,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:49,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249207405] [2024-06-14 14:02:49,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:49,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:49,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249207405] [2024-06-14 14:02:50,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249207405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:50,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307504537] [2024-06-14 14:02:50,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:50,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:50,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:50,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:50,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:50,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:50,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 623 transitions, 9010 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:50,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:50,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:50,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:52,266 INFO L124 PetriNetUnfolderBase]: 4131/6933 cut-off events. [2024-06-14 14:02:52,266 INFO L125 PetriNetUnfolderBase]: For 500158/500160 co-relation queries the response was YES. [2024-06-14 14:02:52,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49972 conditions, 6933 events. 4131/6933 cut-off events. For 500158/500160 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 48761 event pairs, 959 based on Foata normal form. 10/6943 useless extension candidates. Maximal degree in co-relation 49757. Up to 6218 conditions per place. [2024-06-14 14:02:52,375 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 84 changer transitions 0/650 dead transitions. [2024-06-14 14:02:52,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 650 transitions, 10447 flow [2024-06-14 14:02:52,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:52,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:02:52,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:02:52,377 INFO L175 Difference]: Start difference. First operand has 510 places, 623 transitions, 9010 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:02:52,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 650 transitions, 10447 flow [2024-06-14 14:02:55,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 650 transitions, 10209 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:55,744 INFO L231 Difference]: Finished difference. Result has 510 places, 624 transitions, 8985 flow [2024-06-14 14:02:55,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8774, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8985, PETRI_PLACES=510, PETRI_TRANSITIONS=624} [2024-06-14 14:02:55,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 14:02:55,745 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 624 transitions, 8985 flow [2024-06-14 14:02:55,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:55,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:55,745 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, 1, 1] [2024-06-14 14:02:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 14:02:55,745 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:55,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1632539589, now seen corresponding path program 17 times [2024-06-14 14:02:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065913014] [2024-06-14 14:02:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:56,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065913014] [2024-06-14 14:02:56,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065913014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:56,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:56,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:02:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572682175] [2024-06-14 14:02:56,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:56,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:02:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:02:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:02:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:56,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 624 transitions, 8985 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:56,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:56,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:56,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:58,160 INFO L124 PetriNetUnfolderBase]: 4159/6977 cut-off events. [2024-06-14 14:02:58,161 INFO L125 PetriNetUnfolderBase]: For 508395/508397 co-relation queries the response was YES. [2024-06-14 14:02:58,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50097 conditions, 6977 events. 4159/6977 cut-off events. For 508395/508397 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 49092 event pairs, 957 based on Foata normal form. 10/6987 useless extension candidates. Maximal degree in co-relation 49883. Up to 6118 conditions per place. [2024-06-14 14:02:58,277 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 87 changer transitions 0/655 dead transitions. [2024-06-14 14:02:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 655 transitions, 10486 flow [2024-06-14 14:02:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:58,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:02:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 14:02:58,278 INFO L175 Difference]: Start difference. First operand has 510 places, 624 transitions, 8985 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:02:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 655 transitions, 10486 flow [2024-06-14 14:03:00,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 655 transitions, 10294 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:00,903 INFO L231 Difference]: Finished difference. Result has 511 places, 625 transitions, 9011 flow [2024-06-14 14:03:00,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8793, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9011, PETRI_PLACES=511, PETRI_TRANSITIONS=625} [2024-06-14 14:03:00,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-14 14:03:00,904 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 625 transitions, 9011 flow [2024-06-14 14:03:00,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:00,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:00,904 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, 1, 1] [2024-06-14 14:03:00,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 14:03:00,904 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:00,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1490436519, now seen corresponding path program 18 times [2024-06-14 14:03:00,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:00,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885136494] [2024-06-14 14:03:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:00,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:00,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:01,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885136494] [2024-06-14 14:03:01,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885136494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:01,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:01,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:01,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474417007] [2024-06-14 14:03:01,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:01,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:01,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:01,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:01,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 625 transitions, 9011 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:01,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:01,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:01,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:03,275 INFO L124 PetriNetUnfolderBase]: 4179/7009 cut-off events. [2024-06-14 14:03:03,275 INFO L125 PetriNetUnfolderBase]: For 494537/494539 co-relation queries the response was YES. [2024-06-14 14:03:03,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50355 conditions, 7009 events. 4179/7009 cut-off events. For 494537/494539 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 49396 event pairs, 876 based on Foata normal form. 8/7017 useless extension candidates. Maximal degree in co-relation 50141. Up to 5770 conditions per place. [2024-06-14 14:03:03,379 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 553 selfloop transitions, 103 changer transitions 0/662 dead transitions. [2024-06-14 14:03:03,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 662 transitions, 10796 flow [2024-06-14 14:03:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:03,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:03:03,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 14:03:03,380 INFO L175 Difference]: Start difference. First operand has 511 places, 625 transitions, 9011 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:03:03,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 662 transitions, 10796 flow [2024-06-14 14:03:06,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 662 transitions, 10600 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:06,320 INFO L231 Difference]: Finished difference. Result has 513 places, 626 transitions, 9065 flow [2024-06-14 14:03:06,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8815, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9065, PETRI_PLACES=513, PETRI_TRANSITIONS=626} [2024-06-14 14:03:06,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-14 14:03:06,321 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 626 transitions, 9065 flow [2024-06-14 14:03:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:06,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:06,321 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, 1, 1] [2024-06-14 14:03:06,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 14:03:06,322 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:06,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:06,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1812718703, now seen corresponding path program 19 times [2024-06-14 14:03:06,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:06,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795752028] [2024-06-14 14:03:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:06,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:06,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:06,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795752028] [2024-06-14 14:03:06,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795752028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:06,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:06,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:06,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473158416] [2024-06-14 14:03:06,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:06,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:06,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:06,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:06,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:06,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:06,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 626 transitions, 9065 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:06,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:06,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:06,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:08,970 INFO L124 PetriNetUnfolderBase]: 4207/7053 cut-off events. [2024-06-14 14:03:08,971 INFO L125 PetriNetUnfolderBase]: For 519480/519482 co-relation queries the response was YES. [2024-06-14 14:03:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50888 conditions, 7053 events. 4207/7053 cut-off events. For 519480/519482 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49757 event pairs, 991 based on Foata normal form. 10/7063 useless extension candidates. Maximal degree in co-relation 50673. Up to 6338 conditions per place. [2024-06-14 14:03:09,081 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 561 selfloop transitions, 89 changer transitions 0/656 dead transitions. [2024-06-14 14:03:09,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 656 transitions, 10524 flow [2024-06-14 14:03:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:09,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:03:09,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:03:09,083 INFO L175 Difference]: Start difference. First operand has 513 places, 626 transitions, 9065 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:03:09,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 656 transitions, 10524 flow [2024-06-14 14:03:12,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 656 transitions, 10269 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:12,960 INFO L231 Difference]: Finished difference. Result has 518 places, 627 transitions, 9037 flow [2024-06-14 14:03:12,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8812, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9037, PETRI_PLACES=518, PETRI_TRANSITIONS=627} [2024-06-14 14:03:12,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 14:03:12,961 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 627 transitions, 9037 flow [2024-06-14 14:03:12,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:12,961 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, 1, 1] [2024-06-14 14:03:12,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 14:03:12,961 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:12,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1804147823, now seen corresponding path program 20 times [2024-06-14 14:03:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:12,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387274436] [2024-06-14 14:03:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:13,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:13,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387274436] [2024-06-14 14:03:13,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387274436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:13,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:13,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:13,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906069488] [2024-06-14 14:03:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:13,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:13,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:13,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:13,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 627 transitions, 9037 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:13,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:13,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:13,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:15,535 INFO L124 PetriNetUnfolderBase]: 4235/7097 cut-off events. [2024-06-14 14:03:15,535 INFO L125 PetriNetUnfolderBase]: For 526391/526393 co-relation queries the response was YES. [2024-06-14 14:03:15,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51067 conditions, 7097 events. 4235/7097 cut-off events. For 526391/526393 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 50147 event pairs, 979 based on Foata normal form. 10/7107 useless extension candidates. Maximal degree in co-relation 50851. Up to 6216 conditions per place. [2024-06-14 14:03:15,656 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 92 changer transitions 0/662 dead transitions. [2024-06-14 14:03:15,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 662 transitions, 10816 flow [2024-06-14 14:03:15,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:15,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 14:03:15,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 14:03:15,657 INFO L175 Difference]: Start difference. First operand has 518 places, 627 transitions, 9037 flow. Second operand 11 states and 235 transitions. [2024-06-14 14:03:15,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 662 transitions, 10816 flow [2024-06-14 14:03:19,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 662 transitions, 10615 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:19,014 INFO L231 Difference]: Finished difference. Result has 520 places, 628 transitions, 9066 flow [2024-06-14 14:03:19,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8836, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9066, PETRI_PLACES=520, PETRI_TRANSITIONS=628} [2024-06-14 14:03:19,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-14 14:03:19,015 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 628 transitions, 9066 flow [2024-06-14 14:03:19,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:19,016 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, 1, 1] [2024-06-14 14:03:19,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 14:03:19,016 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:19,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:19,016 INFO L85 PathProgramCache]: Analyzing trace with hash 75014627, now seen corresponding path program 21 times [2024-06-14 14:03:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:19,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039166475] [2024-06-14 14:03:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:19,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:19,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:19,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039166475] [2024-06-14 14:03:19,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039166475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:19,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:19,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:19,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726332437] [2024-06-14 14:03:19,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:19,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:19,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:19,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:19,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 628 transitions, 9066 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:19,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:19,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:21,717 INFO L124 PetriNetUnfolderBase]: 4217/7071 cut-off events. [2024-06-14 14:03:21,718 INFO L125 PetriNetUnfolderBase]: For 466988/466990 co-relation queries the response was YES. [2024-06-14 14:03:21,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49714 conditions, 7071 events. 4217/7071 cut-off events. For 466988/466990 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 49965 event pairs, 987 based on Foata normal form. 10/7081 useless extension candidates. Maximal degree in co-relation 49497. Up to 6352 conditions per place. [2024-06-14 14:03:21,831 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 562 selfloop transitions, 90 changer transitions 0/658 dead transitions. [2024-06-14 14:03:21,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 658 transitions, 10489 flow [2024-06-14 14:03:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:03:21,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 14:03:21,833 INFO L175 Difference]: Start difference. First operand has 520 places, 628 transitions, 9066 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:03:21,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 658 transitions, 10489 flow [2024-06-14 14:03:24,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 658 transitions, 10177 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:24,749 INFO L231 Difference]: Finished difference. Result has 522 places, 628 transitions, 8941 flow [2024-06-14 14:03:24,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8754, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8941, PETRI_PLACES=522, PETRI_TRANSITIONS=628} [2024-06-14 14:03:24,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-14 14:03:24,750 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 628 transitions, 8941 flow [2024-06-14 14:03:24,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:24,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:24,750 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, 1, 1] [2024-06-14 14:03:24,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 14:03:24,751 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:24,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:24,751 INFO L85 PathProgramCache]: Analyzing trace with hash -2040404651, now seen corresponding path program 2 times [2024-06-14 14:03:24,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:24,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954369861] [2024-06-14 14:03:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:24,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954369861] [2024-06-14 14:03:25,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954369861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:25,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:25,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979224300] [2024-06-14 14:03:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:25,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:25,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:25,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 628 transitions, 8941 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:25,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:25,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:25,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:27,416 INFO L124 PetriNetUnfolderBase]: 4237/7103 cut-off events. [2024-06-14 14:03:27,417 INFO L125 PetriNetUnfolderBase]: For 452157/452159 co-relation queries the response was YES. [2024-06-14 14:03:27,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49257 conditions, 7103 events. 4237/7103 cut-off events. For 452157/452159 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 50189 event pairs, 983 based on Foata normal form. 8/7111 useless extension candidates. Maximal degree in co-relation 49040. Up to 6278 conditions per place. [2024-06-14 14:03:27,524 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 560 selfloop transitions, 96 changer transitions 0/662 dead transitions. [2024-06-14 14:03:27,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 662 transitions, 10424 flow [2024-06-14 14:03:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-14 14:03:27,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-14 14:03:27,526 INFO L175 Difference]: Start difference. First operand has 522 places, 628 transitions, 8941 flow. Second operand 12 states and 251 transitions. [2024-06-14 14:03:27,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 662 transitions, 10424 flow [2024-06-14 14:03:30,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 662 transitions, 10229 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:03:30,800 INFO L231 Difference]: Finished difference. Result has 523 places, 629 transitions, 8970 flow [2024-06-14 14:03:30,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8970, PETRI_PLACES=523, PETRI_TRANSITIONS=629} [2024-06-14 14:03:30,800 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-14 14:03:30,801 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 629 transitions, 8970 flow [2024-06-14 14:03:30,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:30,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:30,801 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, 1, 1] [2024-06-14 14:03:30,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 14:03:30,801 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:30,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2040404837, now seen corresponding path program 4 times [2024-06-14 14:03:30,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884782709] [2024-06-14 14:03:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:31,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:31,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884782709] [2024-06-14 14:03:31,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884782709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:31,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:31,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:31,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462026773] [2024-06-14 14:03:31,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:31,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:31,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:31,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:31,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:31,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 629 transitions, 8970 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:31,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:31,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:31,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:33,229 INFO L124 PetriNetUnfolderBase]: 4265/7153 cut-off events. [2024-06-14 14:03:33,230 INFO L125 PetriNetUnfolderBase]: For 458530/458532 co-relation queries the response was YES. [2024-06-14 14:03:33,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49728 conditions, 7153 events. 4265/7153 cut-off events. For 458530/458532 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 50656 event pairs, 973 based on Foata normal form. 8/7161 useless extension candidates. Maximal degree in co-relation 49510. Up to 6383 conditions per place. [2024-06-14 14:03:33,339 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 585 selfloop transitions, 73 changer transitions 0/664 dead transitions. [2024-06-14 14:03:33,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 664 transitions, 10561 flow [2024-06-14 14:03:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 14:03:33,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:03:33,341 INFO L175 Difference]: Start difference. First operand has 523 places, 629 transitions, 8970 flow. Second operand 9 states and 198 transitions. [2024-06-14 14:03:33,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 664 transitions, 10561 flow [2024-06-14 14:03:37,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 664 transitions, 10344 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:37,368 INFO L231 Difference]: Finished difference. Result has 523 places, 632 transitions, 8984 flow [2024-06-14 14:03:37,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8762, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8984, PETRI_PLACES=523, PETRI_TRANSITIONS=632} [2024-06-14 14:03:37,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-14 14:03:37,374 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 632 transitions, 8984 flow [2024-06-14 14:03:37,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:37,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:37,374 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, 1, 1] [2024-06-14 14:03:37,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 14:03:37,374 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:37,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1597575851, now seen corresponding path program 3 times [2024-06-14 14:03:37,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:37,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266351618] [2024-06-14 14:03:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266351618] [2024-06-14 14:03:37,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266351618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:37,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:37,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:03:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515241187] [2024-06-14 14:03:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:37,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:03:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:37,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:03:37,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:03:37,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:37,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 632 transitions, 8984 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:37,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:37,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:37,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:39,976 INFO L124 PetriNetUnfolderBase]: 4285/7187 cut-off events. [2024-06-14 14:03:39,977 INFO L125 PetriNetUnfolderBase]: For 465525/465527 co-relation queries the response was YES. [2024-06-14 14:03:40,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49942 conditions, 7187 events. 4285/7187 cut-off events. For 465525/465527 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 50851 event pairs, 899 based on Foata normal form. 8/7195 useless extension candidates. Maximal degree in co-relation 49722. Up to 5899 conditions per place. [2024-06-14 14:03:40,090 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 550 selfloop transitions, 114 changer transitions 0/670 dead transitions. [2024-06-14 14:03:40,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 670 transitions, 10799 flow [2024-06-14 14:03:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-14 14:03:40,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-14 14:03:40,092 INFO L175 Difference]: Start difference. First operand has 523 places, 632 transitions, 8984 flow. Second operand 11 states and 239 transitions. [2024-06-14 14:03:40,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 670 transitions, 10799 flow