./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 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/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe019_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 --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:38:15,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:38:15,991 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:38:15,995 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:38:15,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:38:16,020 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:38:16,021 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:38:16,021 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:38:16,022 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:38:16,022 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:38:16,023 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:38:16,023 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:38:16,023 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:38:16,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:38:16,024 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:38:16,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:38:16,025 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:38:16,025 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:38:16,026 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:38:16,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:38:16,027 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:38:16,027 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:38:16,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:38:16,028 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:38:16,028 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:38:16,028 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:38:16,029 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:38:16,029 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:38:16,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:38:16,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:38:16,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:38:16,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:38:16,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:38:16,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:38:16,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:38:16,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:38:16,032 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:38:16,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:38:16,033 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:38:16,034 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:38:16,034 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:38:16,034 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:38:16,035 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:38:16,035 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:38:16,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:38:16,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:38:16,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:38:16,249 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:38:16,250 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:38:16,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 10:38:16,423 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:38:16,423 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:38:16,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:38:17,578 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:38:17,797 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:38:17,798 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:38:17,822 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad42ef9d/8cae7c0aefca419fa0b1c364060adc2f/FLAG8087e13a5 [2024-05-12 10:38:17,832 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ad42ef9d/8cae7c0aefca419fa0b1c364060adc2f [2024-05-12 10:38:17,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:38:17,833 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:38:17,836 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:38:17,836 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:38:17,839 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:38:17,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:38:16" (1/2) ... [2024-05-12 10:38:17,841 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798fe1b4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:38:17, skipping insertion in model container [2024-05-12 10:38:17,841 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:38:16" (1/2) ... [2024-05-12 10:38:17,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@133114 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:38:17, skipping insertion in model container [2024-05-12 10:38:17,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:38:17" (2/2) ... [2024-05-12 10:38:17,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798fe1b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:17, skipping insertion in model container [2024-05-12 10:38:17,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:38:17" (2/2) ... [2024-05-12 10:38:17,843 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:38:17,901 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:38:17,902 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:38:17,902 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:38:17,902 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:38:17,903 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:38:17,903 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:38:17,903 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-05-12 10:38:17,946 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:38:18,131 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 10:38:18,341 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:38:18,349 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:38:18,385 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:38:18,511 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:38:18,542 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:38:18,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18 WrapperNode [2024-05-12 10:38:18,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:38:18,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:38:18,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:38:18,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:38:18,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,606 INFO L138 Inliner]: procedures = 177, calls = 62, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 88 [2024-05-12 10:38:18,607 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:38:18,608 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:38:18,608 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:38:18,608 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:38:18,618 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,623 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,637 INFO L175 MemorySlicer]: Split 6 memory accesses to 5 slices as follows [2, 1, 1, 1, 1]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 4 writes are split as follows [0, 1, 1, 1, 1]. [2024-05-12 10:38:18,637 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,637 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,647 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,649 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:38:18,656 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:38:18,656 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:38:18,656 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:38:18,657 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (1/1) ... [2024-05-12 10:38:18,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:38:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:38:18,687 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) [2024-05-12 10:38:18,700 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 [2024-05-12 10:38:18,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:38:18,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:38:18,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:38:18,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:38:18,723 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:38:18,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:38:18,723 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:38:18,723 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:38:18,728 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:38:18,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:38:18,728 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-05-12 10:38:18,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:38:18,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:38:18,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:38:18,732 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:38:18,851 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:38:18,853 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:38:19,164 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:38:19,165 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:38:19,303 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:38:19,304 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:38:19,305 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:38:19 BoogieIcfgContainer [2024-05-12 10:38:19,305 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:38:19,309 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:38:19,309 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:38:19,312 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:38:19,312 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:38:16" (1/4) ... [2024-05-12 10:38:19,313 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4354a3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:38:19, skipping insertion in model container [2024-05-12 10:38:19,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:38:17" (2/4) ... [2024-05-12 10:38:19,318 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4354a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:38:19, skipping insertion in model container [2024-05-12 10:38:19,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:38:18" (3/4) ... [2024-05-12 10:38:19,319 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4354a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:38:19, skipping insertion in model container [2024-05-12 10:38:19,319 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:38:19" (4/4) ... [2024-05-12 10:38:19,321 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:38:19,337 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:38:19,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-05-12 10:38:19,337 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:38:19,408 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:38:19,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 10:38:19,489 INFO L124 PetriNetUnfolderBase]: 1/51 cut-off events. [2024-05-12 10:38:19,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:38:19,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 51 events. 1/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-05-12 10:38:19,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 55 transitions, 126 flow [2024-05-12 10:38:19,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 48 transitions, 108 flow [2024-05-12 10:38:19,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:38:19,521 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;@316257d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:38:19,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-05-12 10:38:19,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:38:19,527 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:38:19,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:38:19,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:19,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:38:19,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:19,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:19,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1429231974, now seen corresponding path program 1 times [2024-05-12 10:38:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:19,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103881102] [2024-05-12 10:38:19,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:20,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:20,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103881102] [2024-05-12 10:38:20,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103881102] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:20,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:20,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:38:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412145039] [2024-05-12 10:38:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:20,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:38:20,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:20,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:38:20,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:38:20,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 55 [2024-05-12 10:38:20,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:20,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:20,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 55 [2024-05-12 10:38:20,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:21,050 INFO L124 PetriNetUnfolderBase]: 3091/4551 cut-off events. [2024-05-12 10:38:21,051 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-05-12 10:38:21,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8987 conditions, 4551 events. 3091/4551 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 27461 event pairs, 1949 based on Foata normal form. 1/4470 useless extension candidates. Maximal degree in co-relation 8971. Up to 4287 conditions per place. [2024-05-12 10:38:21,089 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 42 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-05-12 10:38:21,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 64 transitions, 243 flow [2024-05-12 10:38:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:38:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:38:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-05-12 10:38:21,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-05-12 10:38:21,105 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 108 flow. Second operand 3 states and 117 transitions. [2024-05-12 10:38:21,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 64 transitions, 243 flow [2024-05-12 10:38:21,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 236 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:21,111 INFO L231 Difference]: Finished difference. Result has 60 places, 52 transitions, 143 flow [2024-05-12 10:38:21,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=60, PETRI_TRANSITIONS=52} [2024-05-12 10:38:21,116 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, -1 predicate places. [2024-05-12 10:38:21,117 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 52 transitions, 143 flow [2024-05-12 10:38:21,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:21,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:21,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:21,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:38:21,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:21,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash 965478250, now seen corresponding path program 1 times [2024-05-12 10:38:21,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:21,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558867066] [2024-05-12 10:38:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:21,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:21,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558867066] [2024-05-12 10:38:21,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558867066] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:21,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454839306] [2024-05-12 10:38:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:21,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:21,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 143 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:21,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:21,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:21,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:22,655 INFO L124 PetriNetUnfolderBase]: 5391/8328 cut-off events. [2024-05-12 10:38:22,656 INFO L125 PetriNetUnfolderBase]: For 1502/1520 co-relation queries the response was YES. [2024-05-12 10:38:22,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18170 conditions, 8328 events. 5391/8328 cut-off events. For 1502/1520 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 52739 event pairs, 3278 based on Foata normal form. 15/8256 useless extension candidates. Maximal degree in co-relation 18155. Up to 7279 conditions per place. [2024-05-12 10:38:22,718 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 55 selfloop transitions, 8 changer transitions 0/78 dead transitions. [2024-05-12 10:38:22,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 335 flow [2024-05-12 10:38:22,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:38:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:38:22,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 10:38:22,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-05-12 10:38:22,732 INFO L175 Difference]: Start difference. First operand has 60 places, 52 transitions, 143 flow. Second operand 4 states and 147 transitions. [2024-05-12 10:38:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 335 flow [2024-05-12 10:38:22,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:38:22,742 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 178 flow [2024-05-12 10:38:22,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-05-12 10:38:22,743 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 1 predicate places. [2024-05-12 10:38:22,743 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 178 flow [2024-05-12 10:38:22,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:22,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:22,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:22,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:38:22,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:22,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:22,746 INFO L85 PathProgramCache]: Analyzing trace with hash 445610994, now seen corresponding path program 1 times [2024-05-12 10:38:22,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:22,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919491958] [2024-05-12 10:38:22,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:22,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:23,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:23,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919491958] [2024-05-12 10:38:23,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919491958] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:23,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:23,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:38:23,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316487671] [2024-05-12 10:38:23,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:23,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:38:23,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:23,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:38:23,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:38:23,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:23,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:23,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:23,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:23,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:23,980 INFO L124 PetriNetUnfolderBase]: 5334/7798 cut-off events. [2024-05-12 10:38:23,981 INFO L125 PetriNetUnfolderBase]: For 3461/3461 co-relation queries the response was YES. [2024-05-12 10:38:23,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19167 conditions, 7798 events. 5334/7798 cut-off events. For 3461/3461 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 46810 event pairs, 2518 based on Foata normal form. 3/7787 useless extension candidates. Maximal degree in co-relation 19150. Up to 7276 conditions per place. [2024-05-12 10:38:24,041 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 59 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-05-12 10:38:24,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 394 flow [2024-05-12 10:38:24,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:38:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:38:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-05-12 10:38:24,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-05-12 10:38:24,045 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 178 flow. Second operand 4 states and 144 transitions. [2024-05-12 10:38:24,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 394 flow [2024-05-12 10:38:24,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 372 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-05-12 10:38:24,049 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 230 flow [2024-05-12 10:38:24,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-05-12 10:38:24,050 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 4 predicate places. [2024-05-12 10:38:24,050 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 230 flow [2024-05-12 10:38:24,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:24,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:24,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:24,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:38:24,051 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:24,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:24,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1264544943, now seen corresponding path program 1 times [2024-05-12 10:38:24,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:24,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885833929] [2024-05-12 10:38:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:24,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:24,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885833929] [2024-05-12 10:38:24,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885833929] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:24,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:24,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:38:24,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363558286] [2024-05-12 10:38:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:24,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:38:24,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:24,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:38:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:38:24,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:24,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 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) [2024-05-12 10:38:24,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:24,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:24,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:25,506 INFO L124 PetriNetUnfolderBase]: 5319/8071 cut-off events. [2024-05-12 10:38:25,506 INFO L125 PetriNetUnfolderBase]: For 6226/6226 co-relation queries the response was YES. [2024-05-12 10:38:25,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21420 conditions, 8071 events. 5319/8071 cut-off events. For 6226/6226 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 50050 event pairs, 2870 based on Foata normal form. 6/8021 useless extension candidates. Maximal degree in co-relation 21401. Up to 7217 conditions per place. [2024-05-12 10:38:25,568 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 69 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-05-12 10:38:25,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 484 flow [2024-05-12 10:38:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:25,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-05-12 10:38:25,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436363636363637 [2024-05-12 10:38:25,571 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 230 flow. Second operand 5 states and 177 transitions. [2024-05-12 10:38:25,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 484 flow [2024-05-12 10:38:25,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 480 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-05-12 10:38:25,579 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 282 flow [2024-05-12 10:38:25,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=282, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-05-12 10:38:25,580 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2024-05-12 10:38:25,580 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 282 flow [2024-05-12 10:38:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 5 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) [2024-05-12 10:38:25,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:25,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:25,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:38:25,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:25,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:25,581 INFO L85 PathProgramCache]: Analyzing trace with hash 677799305, now seen corresponding path program 1 times [2024-05-12 10:38:25,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:25,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906991559] [2024-05-12 10:38:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:25,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:26,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906991559] [2024-05-12 10:38:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906991559] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:26,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:26,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945398081] [2024-05-12 10:38:26,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:26,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:26,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:26,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:26,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:26,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:26,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:27,068 INFO L124 PetriNetUnfolderBase]: 6856/10086 cut-off events. [2024-05-12 10:38:27,069 INFO L125 PetriNetUnfolderBase]: For 11868/11879 co-relation queries the response was YES. [2024-05-12 10:38:27,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28910 conditions, 10086 events. 6856/10086 cut-off events. For 11868/11879 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 61692 event pairs, 2682 based on Foata normal form. 15/10061 useless extension candidates. Maximal degree in co-relation 28888. Up to 9111 conditions per place. [2024-05-12 10:38:27,167 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 65 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2024-05-12 10:38:27,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 550 flow [2024-05-12 10:38:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:38:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:38:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-05-12 10:38:27,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6681818181818182 [2024-05-12 10:38:27,169 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 282 flow. Second operand 4 states and 147 transitions. [2024-05-12 10:38:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 550 flow [2024-05-12 10:38:27,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 520 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:27,187 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 352 flow [2024-05-12 10:38:27,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-05-12 10:38:27,188 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2024-05-12 10:38:27,188 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 352 flow [2024-05-12 10:38:27,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:27,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:27,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:27,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:38:27,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:27,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2023011057, now seen corresponding path program 2 times [2024-05-12 10:38:27,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:27,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808179913] [2024-05-12 10:38:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:27,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:27,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:27,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808179913] [2024-05-12 10:38:27,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808179913] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:27,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:27,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723374205] [2024-05-12 10:38:27,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:27,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:27,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:27,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:27,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:27,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:27,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:27,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:28,622 INFO L124 PetriNetUnfolderBase]: 6847/10010 cut-off events. [2024-05-12 10:38:28,623 INFO L125 PetriNetUnfolderBase]: For 17734/17736 co-relation queries the response was YES. [2024-05-12 10:38:28,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32200 conditions, 10010 events. 6847/10010 cut-off events. For 17734/17736 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 60640 event pairs, 3121 based on Foata normal form. 3/9971 useless extension candidates. Maximal degree in co-relation 32177. Up to 9179 conditions per place. [2024-05-12 10:38:28,709 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 80 selfloop transitions, 20 changer transitions 0/114 dead transitions. [2024-05-12 10:38:28,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 114 transitions, 722 flow [2024-05-12 10:38:28,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-05-12 10:38:28,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436363636363637 [2024-05-12 10:38:28,712 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 352 flow. Second operand 5 states and 177 transitions. [2024-05-12 10:38:28,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 114 transitions, 722 flow [2024-05-12 10:38:28,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 654 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-05-12 10:38:28,748 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 465 flow [2024-05-12 10:38:28,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=465, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-05-12 10:38:28,750 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-05-12 10:38:28,750 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 465 flow [2024-05-12 10:38:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:28,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:28,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:28,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:38:28,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:28,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938657, now seen corresponding path program 1 times [2024-05-12 10:38:28,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:28,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717983090] [2024-05-12 10:38:28,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:28,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:29,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:29,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717983090] [2024-05-12 10:38:29,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717983090] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:29,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:29,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:38:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957815932] [2024-05-12 10:38:29,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:29,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:38:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:38:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:38:29,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:29,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 465 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-05-12 10:38:29,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:29,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:29,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:30,333 INFO L124 PetriNetUnfolderBase]: 6572/9965 cut-off events. [2024-05-12 10:38:30,333 INFO L125 PetriNetUnfolderBase]: For 19305/19308 co-relation queries the response was YES. [2024-05-12 10:38:30,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31817 conditions, 9965 events. 6572/9965 cut-off events. For 19305/19308 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 63218 event pairs, 3409 based on Foata normal form. 5/9873 useless extension candidates. Maximal degree in co-relation 31791. Up to 8753 conditions per place. [2024-05-12 10:38:30,410 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 85 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-05-12 10:38:30,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 827 flow [2024-05-12 10:38:30,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:38:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:38:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-05-12 10:38:30,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6590909090909091 [2024-05-12 10:38:30,411 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 465 flow. Second operand 4 states and 145 transitions. [2024-05-12 10:38:30,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 827 flow [2024-05-12 10:38:30,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 791 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-05-12 10:38:30,434 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 570 flow [2024-05-12 10:38:30,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=570, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-05-12 10:38:30,435 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 20 predicate places. [2024-05-12 10:38:30,436 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 570 flow [2024-05-12 10:38:30,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-05-12 10:38:30,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:30,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:30,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:38:30,437 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:30,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1809778034, now seen corresponding path program 1 times [2024-05-12 10:38:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916255967] [2024-05-12 10:38:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:30,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:30,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916255967] [2024-05-12 10:38:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916255967] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:30,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:30,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:30,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219219675] [2024-05-12 10:38:30,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:30,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:30,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 570 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:30,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:30,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:30,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:32,016 INFO L124 PetriNetUnfolderBase]: 7672/11540 cut-off events. [2024-05-12 10:38:32,016 INFO L125 PetriNetUnfolderBase]: For 34326/34334 co-relation queries the response was YES. [2024-05-12 10:38:32,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41924 conditions, 11540 events. 7672/11540 cut-off events. For 34326/34334 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 72475 event pairs, 2084 based on Foata normal form. 34/11494 useless extension candidates. Maximal degree in co-relation 41894. Up to 9344 conditions per place. [2024-05-12 10:38:32,113 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 105 selfloop transitions, 39 changer transitions 0/158 dead transitions. [2024-05-12 10:38:32,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 158 transitions, 1131 flow [2024-05-12 10:38:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:32,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:32,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 222 transitions. [2024-05-12 10:38:32,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2024-05-12 10:38:32,116 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 570 flow. Second operand 6 states and 222 transitions. [2024-05-12 10:38:32,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 158 transitions, 1131 flow [2024-05-12 10:38:32,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 158 transitions, 1117 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-05-12 10:38:32,151 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 763 flow [2024-05-12 10:38:32,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-05-12 10:38:32,154 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 27 predicate places. [2024-05-12 10:38:32,154 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 763 flow [2024-05-12 10:38:32,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:32,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:32,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:32,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:38:32,155 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:32,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:32,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1627187832, now seen corresponding path program 2 times [2024-05-12 10:38:32,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:32,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135840536] [2024-05-12 10:38:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:32,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:32,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:32,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135840536] [2024-05-12 10:38:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135840536] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:32,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:32,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:32,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226157829] [2024-05-12 10:38:32,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:32,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:32,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:32,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:32,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:32,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:32,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 763 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:32,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:32,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:32,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:33,604 INFO L124 PetriNetUnfolderBase]: 7550/10992 cut-off events. [2024-05-12 10:38:33,604 INFO L125 PetriNetUnfolderBase]: For 43048/43056 co-relation queries the response was YES. [2024-05-12 10:38:33,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43985 conditions, 10992 events. 7550/10992 cut-off events. For 43048/43056 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 66805 event pairs, 2187 based on Foata normal form. 52/11015 useless extension candidates. Maximal degree in co-relation 43951. Up to 9599 conditions per place. [2024-05-12 10:38:33,696 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 97 selfloop transitions, 33 changer transitions 0/144 dead transitions. [2024-05-12 10:38:33,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 144 transitions, 1151 flow [2024-05-12 10:38:33,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 184 transitions. [2024-05-12 10:38:33,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6690909090909091 [2024-05-12 10:38:33,698 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 763 flow. Second operand 5 states and 184 transitions. [2024-05-12 10:38:33,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 144 transitions, 1151 flow [2024-05-12 10:38:33,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 144 transitions, 1086 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-05-12 10:38:33,809 INFO L231 Difference]: Finished difference. Result has 91 places, 106 transitions, 797 flow [2024-05-12 10:38:33,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=702, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=797, PETRI_PLACES=91, PETRI_TRANSITIONS=106} [2024-05-12 10:38:33,811 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 30 predicate places. [2024-05-12 10:38:33,811 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 106 transitions, 797 flow [2024-05-12 10:38:33,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:33,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:33,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:33,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:38:33,816 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:33,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:33,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1923601458, now seen corresponding path program 3 times [2024-05-12 10:38:33,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:33,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393985906] [2024-05-12 10:38:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:33,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:34,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:34,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393985906] [2024-05-12 10:38:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393985906] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:34,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:34,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:34,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476295091] [2024-05-12 10:38:34,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:34,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:34,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:34,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:34,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 106 transitions, 797 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:34,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:34,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:34,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:35,165 INFO L124 PetriNetUnfolderBase]: 7665/11352 cut-off events. [2024-05-12 10:38:35,166 INFO L125 PetriNetUnfolderBase]: For 46743/46745 co-relation queries the response was YES. [2024-05-12 10:38:35,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45422 conditions, 11352 events. 7665/11352 cut-off events. For 46743/46745 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 70723 event pairs, 3377 based on Foata normal form. 24/11300 useless extension candidates. Maximal degree in co-relation 45386. Up to 10142 conditions per place. [2024-05-12 10:38:35,240 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 116 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-05-12 10:38:35,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 153 transitions, 1226 flow [2024-05-12 10:38:35,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-05-12 10:38:35,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6393939393939394 [2024-05-12 10:38:35,241 INFO L175 Difference]: Start difference. First operand has 91 places, 106 transitions, 797 flow. Second operand 6 states and 211 transitions. [2024-05-12 10:38:35,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 153 transitions, 1226 flow [2024-05-12 10:38:35,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1168 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:35,311 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 827 flow [2024-05-12 10:38:35,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=827, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-05-12 10:38:35,312 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 33 predicate places. [2024-05-12 10:38:35,312 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 827 flow [2024-05-12 10:38:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:35,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:35,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:35,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:38:35,313 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:35,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1506360398, now seen corresponding path program 1 times [2024-05-12 10:38:35,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:35,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919787007] [2024-05-12 10:38:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:35,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:35,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:35,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919787007] [2024-05-12 10:38:35,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919787007] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:35,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:35,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967959885] [2024-05-12 10:38:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:35,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:35,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:35,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:35,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:35,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:36,660 INFO L124 PetriNetUnfolderBase]: 7626/11347 cut-off events. [2024-05-12 10:38:36,660 INFO L125 PetriNetUnfolderBase]: For 52938/52940 co-relation queries the response was YES. [2024-05-12 10:38:36,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45992 conditions, 11347 events. 7626/11347 cut-off events. For 52938/52940 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 70740 event pairs, 2943 based on Foata normal form. 18/11281 useless extension candidates. Maximal degree in co-relation 45955. Up to 9653 conditions per place. [2024-05-12 10:38:36,737 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 116 selfloop transitions, 29 changer transitions 0/159 dead transitions. [2024-05-12 10:38:36,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 159 transitions, 1285 flow [2024-05-12 10:38:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-05-12 10:38:36,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-05-12 10:38:36,738 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 827 flow. Second operand 6 states and 213 transitions. [2024-05-12 10:38:36,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 159 transitions, 1285 flow [2024-05-12 10:38:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 159 transitions, 1227 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:36,799 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 881 flow [2024-05-12 10:38:36,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=881, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-05-12 10:38:36,799 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 35 predicate places. [2024-05-12 10:38:36,799 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 881 flow [2024-05-12 10:38:36,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:36,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:36,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:36,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:38:36,800 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:36,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:36,801 INFO L85 PathProgramCache]: Analyzing trace with hash -741480869, now seen corresponding path program 1 times [2024-05-12 10:38:36,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:36,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388522796] [2024-05-12 10:38:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:36,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388522796] [2024-05-12 10:38:37,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388522796] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:38:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430628041] [2024-05-12 10:38:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:38:37,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:38:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:38:37,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:37,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 881 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-05-12 10:38:37,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:37,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:37,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:38,207 INFO L124 PetriNetUnfolderBase]: 7227/10913 cut-off events. [2024-05-12 10:38:38,208 INFO L125 PetriNetUnfolderBase]: For 59608/59617 co-relation queries the response was YES. [2024-05-12 10:38:38,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45703 conditions, 10913 events. 7227/10913 cut-off events. For 59608/59617 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 70105 event pairs, 3310 based on Foata normal form. 8/10855 useless extension candidates. Maximal degree in co-relation 45664. Up to 9739 conditions per place. [2024-05-12 10:38:38,285 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 108 selfloop transitions, 23 changer transitions 0/148 dead transitions. [2024-05-12 10:38:38,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 148 transitions, 1313 flow [2024-05-12 10:38:38,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-05-12 10:38:38,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2024-05-12 10:38:38,289 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 881 flow. Second operand 5 states and 174 transitions. [2024-05-12 10:38:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 148 transitions, 1313 flow [2024-05-12 10:38:38,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 148 transitions, 1250 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:38,362 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1020 flow [2024-05-12 10:38:38,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1020, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-05-12 10:38:38,363 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 39 predicate places. [2024-05-12 10:38:38,363 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1020 flow [2024-05-12 10:38:38,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 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) [2024-05-12 10:38:38,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:38,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:38,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:38:38,364 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:38,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:38,365 INFO L85 PathProgramCache]: Analyzing trace with hash -647083778, now seen corresponding path program 1 times [2024-05-12 10:38:38,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:38,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000518150] [2024-05-12 10:38:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:38,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:38,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:38,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000518150] [2024-05-12 10:38:38,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000518150] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:38,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:38,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417809187] [2024-05-12 10:38:38,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:38,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:38,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:38,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:38,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:38,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:38,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:38,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:38,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:40,193 INFO L124 PetriNetUnfolderBase]: 7456/11239 cut-off events. [2024-05-12 10:38:40,193 INFO L125 PetriNetUnfolderBase]: For 65534/65603 co-relation queries the response was YES. [2024-05-12 10:38:40,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 11239 events. 7456/11239 cut-off events. For 65534/65603 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 72179 event pairs, 3277 based on Foata normal form. 60/11219 useless extension candidates. Maximal degree in co-relation 47907. Up to 9804 conditions per place. [2024-05-12 10:38:40,293 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 97 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2024-05-12 10:38:40,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 155 transitions, 1465 flow [2024-05-12 10:38:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:40,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:40,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-05-12 10:38:40,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2024-05-12 10:38:40,295 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1020 flow. Second operand 5 states and 174 transitions. [2024-05-12 10:38:40,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 155 transitions, 1465 flow [2024-05-12 10:38:40,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1419 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-05-12 10:38:40,407 INFO L231 Difference]: Finished difference. Result has 106 places, 132 transitions, 1184 flow [2024-05-12 10:38:40,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1184, PETRI_PLACES=106, PETRI_TRANSITIONS=132} [2024-05-12 10:38:40,408 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 45 predicate places. [2024-05-12 10:38:40,408 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 132 transitions, 1184 flow [2024-05-12 10:38:40,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:40,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:40,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:40,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:38:40,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:40,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:40,410 INFO L85 PathProgramCache]: Analyzing trace with hash -646697828, now seen corresponding path program 2 times [2024-05-12 10:38:40,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:40,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057111878] [2024-05-12 10:38:40,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:40,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:40,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057111878] [2024-05-12 10:38:40,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057111878] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:40,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729620153] [2024-05-12 10:38:40,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:40,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:40,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:40,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:40,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 132 transitions, 1184 flow. Second operand has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:40,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:40,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:42,193 INFO L124 PetriNetUnfolderBase]: 7528/11117 cut-off events. [2024-05-12 10:38:42,193 INFO L125 PetriNetUnfolderBase]: For 77928/77940 co-relation queries the response was YES. [2024-05-12 10:38:42,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51850 conditions, 11117 events. 7528/11117 cut-off events. For 77928/77940 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 69145 event pairs, 2471 based on Foata normal form. 14/11103 useless extension candidates. Maximal degree in co-relation 51804. Up to 9760 conditions per place. [2024-05-12 10:38:42,270 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 127 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-05-12 10:38:42,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 196 transitions, 1918 flow [2024-05-12 10:38:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:42,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:42,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 247 transitions. [2024-05-12 10:38:42,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415584415584416 [2024-05-12 10:38:42,272 INFO L175 Difference]: Start difference. First operand has 106 places, 132 transitions, 1184 flow. Second operand 7 states and 247 transitions. [2024-05-12 10:38:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 196 transitions, 1918 flow [2024-05-12 10:38:42,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 196 transitions, 1864 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-05-12 10:38:42,386 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1412 flow [2024-05-12 10:38:42,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1412, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-05-12 10:38:42,387 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 52 predicate places. [2024-05-12 10:38:42,387 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1412 flow [2024-05-12 10:38:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.875) internal successors, (175), 8 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:42,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:42,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:38:42,388 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:42,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:42,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1314969376, now seen corresponding path program 1 times [2024-05-12 10:38:42,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:42,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050953704] [2024-05-12 10:38:42,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:42,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:42,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:42,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:42,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050953704] [2024-05-12 10:38:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050953704] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:42,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:42,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:42,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946315876] [2024-05-12 10:38:42,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:42,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:42,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:42,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:42,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1412 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:42,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:42,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:42,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:43,909 INFO L124 PetriNetUnfolderBase]: 7950/11743 cut-off events. [2024-05-12 10:38:43,909 INFO L125 PetriNetUnfolderBase]: For 91605/91614 co-relation queries the response was YES. [2024-05-12 10:38:43,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57905 conditions, 11743 events. 7950/11743 cut-off events. For 91605/91614 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 72842 event pairs, 3300 based on Foata normal form. 5/11716 useless extension candidates. Maximal degree in co-relation 57856. Up to 10603 conditions per place. [2024-05-12 10:38:44,001 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 167 selfloop transitions, 32 changer transitions 0/213 dead transitions. [2024-05-12 10:38:44,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 213 transitions, 2326 flow [2024-05-12 10:38:44,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-05-12 10:38:44,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 10:38:44,003 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1412 flow. Second operand 6 states and 210 transitions. [2024-05-12 10:38:44,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 213 transitions, 2326 flow [2024-05-12 10:38:44,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 213 transitions, 2203 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:44,134 INFO L231 Difference]: Finished difference. Result has 118 places, 166 transitions, 1611 flow [2024-05-12 10:38:44,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1611, PETRI_PLACES=118, PETRI_TRANSITIONS=166} [2024-05-12 10:38:44,135 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 57 predicate places. [2024-05-12 10:38:44,135 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 166 transitions, 1611 flow [2024-05-12 10:38:44,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:44,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:44,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:44,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:38:44,136 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:44,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:44,136 INFO L85 PathProgramCache]: Analyzing trace with hash -105088018, now seen corresponding path program 2 times [2024-05-12 10:38:44,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:44,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540235644] [2024-05-12 10:38:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:44,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:44,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:44,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540235644] [2024-05-12 10:38:44,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540235644] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:44,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:44,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228769130] [2024-05-12 10:38:44,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:44,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:44,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:44,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 166 transitions, 1611 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:44,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:44,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:44,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:45,737 INFO L124 PetriNetUnfolderBase]: 7992/11834 cut-off events. [2024-05-12 10:38:45,738 INFO L125 PetriNetUnfolderBase]: For 103426/103435 co-relation queries the response was YES. [2024-05-12 10:38:45,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59808 conditions, 11834 events. 7992/11834 cut-off events. For 103426/103435 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 73915 event pairs, 3355 based on Foata normal form. 5/11795 useless extension candidates. Maximal degree in co-relation 59756. Up to 10699 conditions per place. [2024-05-12 10:38:45,825 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 169 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-05-12 10:38:45,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 210 transitions, 2347 flow [2024-05-12 10:38:45,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 10:38:45,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-05-12 10:38:45,827 INFO L175 Difference]: Start difference. First operand has 118 places, 166 transitions, 1611 flow. Second operand 5 states and 178 transitions. [2024-05-12 10:38:45,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 210 transitions, 2347 flow [2024-05-12 10:38:45,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 2259 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-05-12 10:38:45,989 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1699 flow [2024-05-12 10:38:45,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-05-12 10:38:45,990 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 62 predicate places. [2024-05-12 10:38:45,990 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1699 flow [2024-05-12 10:38:45,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:45,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:45,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:45,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:38:45,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:45,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:45,991 INFO L85 PathProgramCache]: Analyzing trace with hash -646691876, now seen corresponding path program 3 times [2024-05-12 10:38:45,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:45,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152378934] [2024-05-12 10:38:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:46,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:46,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:46,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152378934] [2024-05-12 10:38:46,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152378934] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:46,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:46,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:46,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217928726] [2024-05-12 10:38:46,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:46,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:46,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:46,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:46,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:46,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:46,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1699 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:46,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:46,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:46,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:47,590 INFO L124 PetriNetUnfolderBase]: 8003/11749 cut-off events. [2024-05-12 10:38:47,590 INFO L125 PetriNetUnfolderBase]: For 114027/114036 co-relation queries the response was YES. [2024-05-12 10:38:47,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61118 conditions, 11749 events. 8003/11749 cut-off events. For 114027/114036 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 72491 event pairs, 2474 based on Foata normal form. 9/11749 useless extension candidates. Maximal degree in co-relation 61063. Up to 10713 conditions per place. [2024-05-12 10:38:47,697 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 176 selfloop transitions, 35 changer transitions 0/225 dead transitions. [2024-05-12 10:38:47,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 225 transitions, 2419 flow [2024-05-12 10:38:47,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:47,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 237 transitions. [2024-05-12 10:38:47,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6155844155844156 [2024-05-12 10:38:47,700 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1699 flow. Second operand 7 states and 237 transitions. [2024-05-12 10:38:47,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 225 transitions, 2419 flow [2024-05-12 10:38:47,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 225 transitions, 2325 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:47,900 INFO L231 Difference]: Finished difference. Result has 127 places, 178 transitions, 1753 flow [2024-05-12 10:38:47,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=127, PETRI_TRANSITIONS=178} [2024-05-12 10:38:47,901 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 66 predicate places. [2024-05-12 10:38:47,901 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 178 transitions, 1753 flow [2024-05-12 10:38:47,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:47,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:47,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:47,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:38:47,902 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:47,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:47,903 INFO L85 PathProgramCache]: Analyzing trace with hash -646683940, now seen corresponding path program 1 times [2024-05-12 10:38:47,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:47,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363506057] [2024-05-12 10:38:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:47,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:48,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:48,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363506057] [2024-05-12 10:38:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363506057] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:48,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478062210] [2024-05-12 10:38:48,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:48,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:48,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:48,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:48,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 178 transitions, 1753 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:48,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:48,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:48,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:49,463 INFO L124 PetriNetUnfolderBase]: 7741/11711 cut-off events. [2024-05-12 10:38:49,463 INFO L125 PetriNetUnfolderBase]: For 122274/122303 co-relation queries the response was YES. [2024-05-12 10:38:49,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60038 conditions, 11711 events. 7741/11711 cut-off events. For 122274/122303 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 75560 event pairs, 3324 based on Foata normal form. 18/11634 useless extension candidates. Maximal degree in co-relation 59982. Up to 10208 conditions per place. [2024-05-12 10:38:49,566 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 174 selfloop transitions, 18 changer transitions 0/214 dead transitions. [2024-05-12 10:38:49,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 214 transitions, 2347 flow [2024-05-12 10:38:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 177 transitions. [2024-05-12 10:38:49,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6436363636363637 [2024-05-12 10:38:49,567 INFO L175 Difference]: Start difference. First operand has 127 places, 178 transitions, 1753 flow. Second operand 5 states and 177 transitions. [2024-05-12 10:38:49,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 214 transitions, 2347 flow [2024-05-12 10:38:49,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 214 transitions, 2247 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:38:49,781 INFO L231 Difference]: Finished difference. Result has 127 places, 181 transitions, 1750 flow [2024-05-12 10:38:49,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1750, PETRI_PLACES=127, PETRI_TRANSITIONS=181} [2024-05-12 10:38:49,782 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 66 predicate places. [2024-05-12 10:38:49,782 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 181 transitions, 1750 flow [2024-05-12 10:38:49,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:49,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:49,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:49,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:38:49,782 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:49,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:49,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1781163424, now seen corresponding path program 1 times [2024-05-12 10:38:49,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:49,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736458863] [2024-05-12 10:38:49,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:49,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:50,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:50,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736458863] [2024-05-12 10:38:50,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736458863] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:50,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:50,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:38:50,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141675534] [2024-05-12 10:38:50,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:38:50,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:38:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:38:50,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:38:50,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 181 transitions, 1750 flow. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:50,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:50,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:38:50,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:51,198 INFO L124 PetriNetUnfolderBase]: 7330/11267 cut-off events. [2024-05-12 10:38:51,198 INFO L125 PetriNetUnfolderBase]: For 147816/148242 co-relation queries the response was YES. [2024-05-12 10:38:51,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59747 conditions, 11267 events. 7330/11267 cut-off events. For 147816/148242 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 74570 event pairs, 3154 based on Foata normal form. 98/11107 useless extension candidates. Maximal degree in co-relation 59690. Up to 9616 conditions per place. [2024-05-12 10:38:51,308 INFO L140 encePairwiseOnDemand]: 47/55 looper letters, 146 selfloop transitions, 16 changer transitions 0/198 dead transitions. [2024-05-12 10:38:51,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 198 transitions, 2138 flow [2024-05-12 10:38:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:38:51,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:38:51,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-05-12 10:38:51,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6409090909090909 [2024-05-12 10:38:51,310 INFO L175 Difference]: Start difference. First operand has 127 places, 181 transitions, 1750 flow. Second operand 4 states and 141 transitions. [2024-05-12 10:38:51,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 198 transitions, 2138 flow [2024-05-12 10:38:51,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 198 transitions, 2071 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:51,563 INFO L231 Difference]: Finished difference. Result has 129 places, 183 transitions, 1769 flow [2024-05-12 10:38:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1769, PETRI_PLACES=129, PETRI_TRANSITIONS=183} [2024-05-12 10:38:51,564 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 68 predicate places. [2024-05-12 10:38:51,564 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 183 transitions, 1769 flow [2024-05-12 10:38:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:51,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:51,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:51,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:38:51,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:51,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2112205880, now seen corresponding path program 1 times [2024-05-12 10:38:51,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:51,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694129285] [2024-05-12 10:38:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:51,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:51,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:51,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694129285] [2024-05-12 10:38:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694129285] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714145763] [2024-05-12 10:38:51,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:51,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:51,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:51,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:51,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 183 transitions, 1769 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:51,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:51,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:51,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:53,259 INFO L124 PetriNetUnfolderBase]: 7892/11552 cut-off events. [2024-05-12 10:38:53,259 INFO L125 PetriNetUnfolderBase]: For 141987/142020 co-relation queries the response was YES. [2024-05-12 10:38:53,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62724 conditions, 11552 events. 7892/11552 cut-off events. For 141987/142020 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 71296 event pairs, 2117 based on Foata normal form. 15/11558 useless extension candidates. Maximal degree in co-relation 62665. Up to 10098 conditions per place. [2024-05-12 10:38:53,383 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 166 selfloop transitions, 41 changer transitions 0/231 dead transitions. [2024-05-12 10:38:53,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 231 transitions, 2505 flow [2024-05-12 10:38:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 210 transitions. [2024-05-12 10:38:53,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 10:38:53,384 INFO L175 Difference]: Start difference. First operand has 129 places, 183 transitions, 1769 flow. Second operand 6 states and 210 transitions. [2024-05-12 10:38:53,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 231 transitions, 2505 flow [2024-05-12 10:38:53,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 231 transitions, 2487 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-05-12 10:38:53,738 INFO L231 Difference]: Finished difference. Result has 135 places, 191 transitions, 2026 flow [2024-05-12 10:38:53,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2026, PETRI_PLACES=135, PETRI_TRANSITIONS=191} [2024-05-12 10:38:53,739 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 74 predicate places. [2024-05-12 10:38:53,739 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 191 transitions, 2026 flow [2024-05-12 10:38:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:53,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:53,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:53,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:38:53,740 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:53,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2109348920, now seen corresponding path program 2 times [2024-05-12 10:38:53,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:53,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679705554] [2024-05-12 10:38:53,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:53,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679705554] [2024-05-12 10:38:54,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679705554] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:54,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:54,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:38:54,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441692589] [2024-05-12 10:38:54,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:38:54,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:54,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:38:54,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:38:54,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:38:54,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 191 transitions, 2026 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:54,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:54,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:38:54,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:55,428 INFO L124 PetriNetUnfolderBase]: 7848/11756 cut-off events. [2024-05-12 10:38:55,429 INFO L125 PetriNetUnfolderBase]: For 161164/161189 co-relation queries the response was YES. [2024-05-12 10:38:55,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64712 conditions, 11756 events. 7848/11756 cut-off events. For 161164/161189 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 75001 event pairs, 3241 based on Foata normal form. 29/11708 useless extension candidates. Maximal degree in co-relation 64650. Up to 10276 conditions per place. [2024-05-12 10:38:55,542 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 167 selfloop transitions, 34 changer transitions 0/225 dead transitions. [2024-05-12 10:38:55,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 225 transitions, 2510 flow [2024-05-12 10:38:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-05-12 10:38:55,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2024-05-12 10:38:55,544 INFO L175 Difference]: Start difference. First operand has 135 places, 191 transitions, 2026 flow. Second operand 6 states and 204 transitions. [2024-05-12 10:38:55,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 225 transitions, 2510 flow [2024-05-12 10:38:56,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 225 transitions, 2332 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:56,021 INFO L231 Difference]: Finished difference. Result has 138 places, 191 transitions, 1925 flow [2024-05-12 10:38:56,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1925, PETRI_PLACES=138, PETRI_TRANSITIONS=191} [2024-05-12 10:38:56,022 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 77 predicate places. [2024-05-12 10:38:56,022 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 191 transitions, 1925 flow [2024-05-12 10:38:56,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 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) [2024-05-12 10:38:56,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:56,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:56,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:38:56,022 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:56,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:56,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1642930348, now seen corresponding path program 1 times [2024-05-12 10:38:56,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:56,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723623977] [2024-05-12 10:38:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:56,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:56,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:56,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723623977] [2024-05-12 10:38:56,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723623977] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:56,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:56,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:56,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462069183] [2024-05-12 10:38:56,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:56,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:56,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:56,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:56,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 191 transitions, 1925 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:57,823 INFO L124 PetriNetUnfolderBase]: 8145/11920 cut-off events. [2024-05-12 10:38:57,824 INFO L125 PetriNetUnfolderBase]: For 161512/161523 co-relation queries the response was YES. [2024-05-12 10:38:57,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65555 conditions, 11920 events. 8145/11920 cut-off events. For 161512/161523 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 73375 event pairs, 2858 based on Foata normal form. 8/11876 useless extension candidates. Maximal degree in co-relation 65492. Up to 10821 conditions per place. [2024-05-12 10:38:57,916 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 162 selfloop transitions, 48 changer transitions 0/224 dead transitions. [2024-05-12 10:38:57,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 224 transitions, 2500 flow [2024-05-12 10:38:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:38:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:38:57,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 176 transitions. [2024-05-12 10:38:57,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-05-12 10:38:57,918 INFO L175 Difference]: Start difference. First operand has 138 places, 191 transitions, 1925 flow. Second operand 5 states and 176 transitions. [2024-05-12 10:38:57,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 224 transitions, 2500 flow [2024-05-12 10:38:58,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 224 transitions, 2427 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:58,176 INFO L231 Difference]: Finished difference. Result has 139 places, 195 transitions, 2051 flow [2024-05-12 10:38:58,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2051, PETRI_PLACES=139, PETRI_TRANSITIONS=195} [2024-05-12 10:38:58,177 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 78 predicate places. [2024-05-12 10:38:58,177 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 195 transitions, 2051 flow [2024-05-12 10:38:58,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:58,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:58,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:38:58,178 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:38:58,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 272387528, now seen corresponding path program 2 times [2024-05-12 10:38:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:58,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240647823] [2024-05-12 10:38:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:58,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:58,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240647823] [2024-05-12 10:38:58,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240647823] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:58,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:58,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:58,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095818237] [2024-05-12 10:38:58,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:58,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:58,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:58,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:58,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:58,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:38:58,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 195 transitions, 2051 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:58,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:58,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:38:58,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:59,778 INFO L124 PetriNetUnfolderBase]: 8169/12065 cut-off events. [2024-05-12 10:38:59,778 INFO L125 PetriNetUnfolderBase]: For 182090/182101 co-relation queries the response was YES. [2024-05-12 10:38:59,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68200 conditions, 12065 events. 8169/12065 cut-off events. For 182090/182101 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 75638 event pairs, 2583 based on Foata normal form. 8/12042 useless extension candidates. Maximal degree in co-relation 68136. Up to 10798 conditions per place. [2024-05-12 10:38:59,896 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 172 selfloop transitions, 57 changer transitions 0/243 dead transitions. [2024-05-12 10:38:59,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 243 transitions, 2862 flow [2024-05-12 10:38:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:38:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:38:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-05-12 10:38:59,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 10:38:59,898 INFO L175 Difference]: Start difference. First operand has 139 places, 195 transitions, 2051 flow. Second operand 6 states and 209 transitions. [2024-05-12 10:38:59,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 243 transitions, 2862 flow [2024-05-12 10:39:00,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 243 transitions, 2723 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:00,216 INFO L231 Difference]: Finished difference. Result has 142 places, 203 transitions, 2215 flow [2024-05-12 10:39:00,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=142, PETRI_TRANSITIONS=203} [2024-05-12 10:39:00,217 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 81 predicate places. [2024-05-12 10:39:00,217 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 203 transitions, 2215 flow [2024-05-12 10:39:00,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:00,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:00,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:39:00,218 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:00,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:00,218 INFO L85 PathProgramCache]: Analyzing trace with hash 272656298, now seen corresponding path program 3 times [2024-05-12 10:39:00,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454266231] [2024-05-12 10:39:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:00,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:00,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454266231] [2024-05-12 10:39:00,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454266231] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:00,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:00,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:00,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297801062] [2024-05-12 10:39:00,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:00,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:00,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:00,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:00,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:00,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:00,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 203 transitions, 2215 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:00,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:00,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:00,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:01,854 INFO L124 PetriNetUnfolderBase]: 8193/12006 cut-off events. [2024-05-12 10:39:01,854 INFO L125 PetriNetUnfolderBase]: For 201855/201866 co-relation queries the response was YES. [2024-05-12 10:39:01,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70544 conditions, 12006 events. 8193/12006 cut-off events. For 201855/201866 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 74290 event pairs, 2386 based on Foata normal form. 8/11993 useless extension candidates. Maximal degree in co-relation 70479. Up to 10823 conditions per place. [2024-05-12 10:39:01,975 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 168 selfloop transitions, 62 changer transitions 0/244 dead transitions. [2024-05-12 10:39:01,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 244 transitions, 2946 flow [2024-05-12 10:39:01,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:01,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:01,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-05-12 10:39:01,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-05-12 10:39:01,976 INFO L175 Difference]: Start difference. First operand has 142 places, 203 transitions, 2215 flow. Second operand 6 states and 207 transitions. [2024-05-12 10:39:01,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 244 transitions, 2946 flow [2024-05-12 10:39:02,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 244 transitions, 2773 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-05-12 10:39:02,400 INFO L231 Difference]: Finished difference. Result has 146 places, 207 transitions, 2269 flow [2024-05-12 10:39:02,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2064, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2269, PETRI_PLACES=146, PETRI_TRANSITIONS=207} [2024-05-12 10:39:02,401 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 85 predicate places. [2024-05-12 10:39:02,401 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 207 transitions, 2269 flow [2024-05-12 10:39:02,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:02,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:02,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:02,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:39:02,402 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:02,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:02,403 INFO L85 PathProgramCache]: Analyzing trace with hash 272656639, now seen corresponding path program 1 times [2024-05-12 10:39:02,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:02,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542772793] [2024-05-12 10:39:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:02,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:02,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:02,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542772793] [2024-05-12 10:39:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542772793] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:02,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:02,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670932149] [2024-05-12 10:39:02,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:02,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:02,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:02,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:02,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:02,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:02,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 207 transitions, 2269 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:02,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:02,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:02,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:04,137 INFO L124 PetriNetUnfolderBase]: 8361/12338 cut-off events. [2024-05-12 10:39:04,137 INFO L125 PetriNetUnfolderBase]: For 210365/210382 co-relation queries the response was YES. [2024-05-12 10:39:04,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72724 conditions, 12338 events. 8361/12338 cut-off events. For 210365/210382 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 77119 event pairs, 2423 based on Foata normal form. 15/12337 useless extension candidates. Maximal degree in co-relation 72657. Up to 10855 conditions per place. [2024-05-12 10:39:04,271 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 190 selfloop transitions, 84 changer transitions 0/288 dead transitions. [2024-05-12 10:39:04,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 288 transitions, 3511 flow [2024-05-12 10:39:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:04,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 302 transitions. [2024-05-12 10:39:04,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101010101010101 [2024-05-12 10:39:04,273 INFO L175 Difference]: Start difference. First operand has 146 places, 207 transitions, 2269 flow. Second operand 9 states and 302 transitions. [2024-05-12 10:39:04,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 288 transitions, 3511 flow [2024-05-12 10:39:04,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 288 transitions, 3368 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:04,709 INFO L231 Difference]: Finished difference. Result has 155 places, 231 transitions, 2686 flow [2024-05-12 10:39:04,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2686, PETRI_PLACES=155, PETRI_TRANSITIONS=231} [2024-05-12 10:39:04,709 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 94 predicate places. [2024-05-12 10:39:04,709 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 231 transitions, 2686 flow [2024-05-12 10:39:04,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:04,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:04,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:04,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:39:04,710 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:04,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:04,710 INFO L85 PathProgramCache]: Analyzing trace with hash 940726749, now seen corresponding path program 2 times [2024-05-12 10:39:04,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:04,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48587676] [2024-05-12 10:39:04,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:04,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:05,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:05,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48587676] [2024-05-12 10:39:05,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48587676] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:05,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:05,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:05,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950979209] [2024-05-12 10:39:05,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:05,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:05,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:05,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:05,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:05,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 231 transitions, 2686 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:05,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:05,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:05,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:06,508 INFO L124 PetriNetUnfolderBase]: 8675/12751 cut-off events. [2024-05-12 10:39:06,508 INFO L125 PetriNetUnfolderBase]: For 246865/246876 co-relation queries the response was YES. [2024-05-12 10:39:06,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80526 conditions, 12751 events. 8675/12751 cut-off events. For 246865/246876 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 79361 event pairs, 2397 based on Foata normal form. 12/12746 useless extension candidates. Maximal degree in co-relation 80455. Up to 11140 conditions per place. [2024-05-12 10:39:06,646 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 191 selfloop transitions, 92 changer transitions 0/297 dead transitions. [2024-05-12 10:39:06,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 297 transitions, 4004 flow [2024-05-12 10:39:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-05-12 10:39:06,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6545454545454545 [2024-05-12 10:39:06,648 INFO L175 Difference]: Start difference. First operand has 155 places, 231 transitions, 2686 flow. Second operand 6 states and 216 transitions. [2024-05-12 10:39:06,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 297 transitions, 4004 flow [2024-05-12 10:39:07,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 297 transitions, 3814 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:07,214 INFO L231 Difference]: Finished difference. Result has 159 places, 257 transitions, 3229 flow [2024-05-12 10:39:07,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2533, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3229, PETRI_PLACES=159, PETRI_TRANSITIONS=257} [2024-05-12 10:39:07,215 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 98 predicate places. [2024-05-12 10:39:07,215 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 257 transitions, 3229 flow [2024-05-12 10:39:07,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:07,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:07,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:39:07,215 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:07,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:07,216 INFO L85 PathProgramCache]: Analyzing trace with hash 940934139, now seen corresponding path program 3 times [2024-05-12 10:39:07,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196708527] [2024-05-12 10:39:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:07,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196708527] [2024-05-12 10:39:07,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196708527] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:07,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064108810] [2024-05-12 10:39:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:07,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:07,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:07,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:07,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 257 transitions, 3229 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:07,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:07,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:07,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:09,116 INFO L124 PetriNetUnfolderBase]: 8697/12864 cut-off events. [2024-05-12 10:39:09,116 INFO L125 PetriNetUnfolderBase]: For 279611/279622 co-relation queries the response was YES. [2024-05-12 10:39:09,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84952 conditions, 12864 events. 8697/12864 cut-off events. For 279611/279622 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 80958 event pairs, 2433 based on Foata normal form. 12/12847 useless extension candidates. Maximal degree in co-relation 84878. Up to 11168 conditions per place. [2024-05-12 10:39:09,252 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 194 selfloop transitions, 106 changer transitions 0/314 dead transitions. [2024-05-12 10:39:09,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 314 transitions, 4252 flow [2024-05-12 10:39:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 275 transitions. [2024-05-12 10:39:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 10:39:09,254 INFO L175 Difference]: Start difference. First operand has 159 places, 257 transitions, 3229 flow. Second operand 8 states and 275 transitions. [2024-05-12 10:39:09,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 314 transitions, 4252 flow [2024-05-12 10:39:10,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 314 transitions, 4087 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-05-12 10:39:10,046 INFO L231 Difference]: Finished difference. Result has 165 places, 266 transitions, 3457 flow [2024-05-12 10:39:10,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3457, PETRI_PLACES=165, PETRI_TRANSITIONS=266} [2024-05-12 10:39:10,047 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 104 predicate places. [2024-05-12 10:39:10,047 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 266 transitions, 3457 flow [2024-05-12 10:39:10,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:10,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:10,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:39:10,048 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:10,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:10,048 INFO L85 PathProgramCache]: Analyzing trace with hash 940726408, now seen corresponding path program 4 times [2024-05-12 10:39:10,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108685689] [2024-05-12 10:39:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:10,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:10,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108685689] [2024-05-12 10:39:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108685689] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:10,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:10,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86114719] [2024-05-12 10:39:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:10,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:10,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:10,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:10,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 266 transitions, 3457 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:10,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:10,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:10,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:11,813 INFO L124 PetriNetUnfolderBase]: 8690/12739 cut-off events. [2024-05-12 10:39:11,813 INFO L125 PetriNetUnfolderBase]: For 288992/289003 co-relation queries the response was YES. [2024-05-12 10:39:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 12739 events. 8690/12739 cut-off events. For 288992/289003 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 79541 event pairs, 2372 based on Foata normal form. 8/12726 useless extension candidates. Maximal degree in co-relation 85537. Up to 11501 conditions per place. [2024-05-12 10:39:11,954 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 230 selfloop transitions, 52 changer transitions 0/296 dead transitions. [2024-05-12 10:39:11,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 296 transitions, 4095 flow [2024-05-12 10:39:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:39:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:39:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-05-12 10:39:11,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6472727272727272 [2024-05-12 10:39:11,955 INFO L175 Difference]: Start difference. First operand has 165 places, 266 transitions, 3457 flow. Second operand 5 states and 178 transitions. [2024-05-12 10:39:11,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 296 transitions, 4095 flow [2024-05-12 10:39:12,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 296 transitions, 3763 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:12,861 INFO L231 Difference]: Finished difference. Result has 164 places, 266 transitions, 3245 flow [2024-05-12 10:39:12,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3125, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3245, PETRI_PLACES=164, PETRI_TRANSITIONS=266} [2024-05-12 10:39:12,862 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 103 predicate places. [2024-05-12 10:39:12,862 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 266 transitions, 3245 flow [2024-05-12 10:39:12,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:12,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:12,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:12,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:39:12,863 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:12,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash 940942075, now seen corresponding path program 1 times [2024-05-12 10:39:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:12,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620309505] [2024-05-12 10:39:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:13,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:13,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620309505] [2024-05-12 10:39:13,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620309505] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:13,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:13,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:13,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131997348] [2024-05-12 10:39:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:13,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:13,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:13,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:39:13,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 266 transitions, 3245 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:13,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:13,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:39:13,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:14,857 INFO L124 PetriNetUnfolderBase]: 9010/13282 cut-off events. [2024-05-12 10:39:14,858 INFO L125 PetriNetUnfolderBase]: For 321140/321203 co-relation queries the response was YES. [2024-05-12 10:39:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87541 conditions, 13282 events. 9010/13282 cut-off events. For 321140/321203 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 84308 event pairs, 2445 based on Foata normal form. 60/13295 useless extension candidates. Maximal degree in co-relation 87464. Up to 10894 conditions per place. [2024-05-12 10:39:15,011 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 221 selfloop transitions, 49 changer transitions 0/303 dead transitions. [2024-05-12 10:39:15,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 303 transitions, 4027 flow [2024-05-12 10:39:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 209 transitions. [2024-05-12 10:39:15,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-05-12 10:39:15,012 INFO L175 Difference]: Start difference. First operand has 164 places, 266 transitions, 3245 flow. Second operand 6 states and 209 transitions. [2024-05-12 10:39:15,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 303 transitions, 4027 flow [2024-05-12 10:39:15,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 303 transitions, 3852 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:15,660 INFO L231 Difference]: Finished difference. Result has 165 places, 268 transitions, 3250 flow [2024-05-12 10:39:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3250, PETRI_PLACES=165, PETRI_TRANSITIONS=268} [2024-05-12 10:39:15,661 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 104 predicate places. [2024-05-12 10:39:15,661 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 268 transitions, 3250 flow [2024-05-12 10:39:15,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:15,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:15,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:15,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:39:15,662 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:15,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:15,663 INFO L85 PathProgramCache]: Analyzing trace with hash -194074019, now seen corresponding path program 1 times [2024-05-12 10:39:15,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:15,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991507948] [2024-05-12 10:39:15,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:15,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:15,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991507948] [2024-05-12 10:39:15,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991507948] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:15,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:15,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:39:15,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894357870] [2024-05-12 10:39:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:15,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:39:15,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:39:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:39:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:39:16,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 268 transitions, 3250 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:16,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:16,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:39:16,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:17,475 INFO L124 PetriNetUnfolderBase]: 8481/12898 cut-off events. [2024-05-12 10:39:17,476 INFO L125 PetriNetUnfolderBase]: For 297304/297968 co-relation queries the response was YES. [2024-05-12 10:39:17,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84232 conditions, 12898 events. 8481/12898 cut-off events. For 297304/297968 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 86189 event pairs, 3184 based on Foata normal form. 166/12773 useless extension candidates. Maximal degree in co-relation 84154. Up to 10797 conditions per place. [2024-05-12 10:39:17,634 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 194 selfloop transitions, 44 changer transitions 0/289 dead transitions. [2024-05-12 10:39:17,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 289 transitions, 3776 flow [2024-05-12 10:39:17,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:39:17,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:39:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 174 transitions. [2024-05-12 10:39:17,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2024-05-12 10:39:17,635 INFO L175 Difference]: Start difference. First operand has 165 places, 268 transitions, 3250 flow. Second operand 5 states and 174 transitions. [2024-05-12 10:39:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 289 transitions, 3776 flow [2024-05-12 10:39:18,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 289 transitions, 3650 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-05-12 10:39:18,275 INFO L231 Difference]: Finished difference. Result has 166 places, 268 transitions, 3235 flow [2024-05-12 10:39:18,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3235, PETRI_PLACES=166, PETRI_TRANSITIONS=268} [2024-05-12 10:39:18,275 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 105 predicate places. [2024-05-12 10:39:18,275 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 268 transitions, 3235 flow [2024-05-12 10:39:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:39:18,276 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:18,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1260605537, now seen corresponding path program 4 times [2024-05-12 10:39:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:18,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936376887] [2024-05-12 10:39:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:18,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936376887] [2024-05-12 10:39:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936376887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:18,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607668267] [2024-05-12 10:39:18,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:18,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:18,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:18,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:18,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 268 transitions, 3235 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:18,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:18,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:18,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:20,256 INFO L124 PetriNetUnfolderBase]: 9322/13982 cut-off events. [2024-05-12 10:39:20,256 INFO L125 PetriNetUnfolderBase]: For 283275/283284 co-relation queries the response was YES. [2024-05-12 10:39:20,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89389 conditions, 13982 events. 9322/13982 cut-off events. For 283275/283284 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 89583 event pairs, 2789 based on Foata normal form. 5/13969 useless extension candidates. Maximal degree in co-relation 89310. Up to 11838 conditions per place. [2024-05-12 10:39:20,421 INFO L140 encePairwiseOnDemand]: 43/55 looper letters, 254 selfloop transitions, 123 changer transitions 0/391 dead transitions. [2024-05-12 10:39:20,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 391 transitions, 5175 flow [2024-05-12 10:39:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:20,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 377 transitions. [2024-05-12 10:39:20,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231404958677685 [2024-05-12 10:39:20,423 INFO L175 Difference]: Start difference. First operand has 166 places, 268 transitions, 3235 flow. Second operand 11 states and 377 transitions. [2024-05-12 10:39:20,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 391 transitions, 5175 flow [2024-05-12 10:39:21,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 391 transitions, 5061 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:21,076 INFO L231 Difference]: Finished difference. Result has 175 places, 297 transitions, 3907 flow [2024-05-12 10:39:21,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3137, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3907, PETRI_PLACES=175, PETRI_TRANSITIONS=297} [2024-05-12 10:39:21,076 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 114 predicate places. [2024-05-12 10:39:21,077 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 297 transitions, 3907 flow [2024-05-12 10:39:21,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:21,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:21,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:21,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:39:21,077 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:21,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:21,078 INFO L85 PathProgramCache]: Analyzing trace with hash 495931307, now seen corresponding path program 5 times [2024-05-12 10:39:21,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:21,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307166903] [2024-05-12 10:39:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:21,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:21,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:21,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307166903] [2024-05-12 10:39:21,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307166903] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:21,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:21,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:21,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480745919] [2024-05-12 10:39:21,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:21,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:21,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:21,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:21,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:21,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:21,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 297 transitions, 3907 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:21,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:21,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:21,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:23,334 INFO L124 PetriNetUnfolderBase]: 9558/13949 cut-off events. [2024-05-12 10:39:23,334 INFO L125 PetriNetUnfolderBase]: For 314701/314712 co-relation queries the response was YES. [2024-05-12 10:39:23,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96425 conditions, 13949 events. 9558/13949 cut-off events. For 314701/314712 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 87636 event pairs, 2452 based on Foata normal form. 9/13937 useless extension candidates. Maximal degree in co-relation 96343. Up to 12524 conditions per place. [2024-05-12 10:39:23,506 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 263 selfloop transitions, 86 changer transitions 0/363 dead transitions. [2024-05-12 10:39:23,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 363 transitions, 5303 flow [2024-05-12 10:39:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:39:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:39:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-05-12 10:39:23,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303030303030303 [2024-05-12 10:39:23,507 INFO L175 Difference]: Start difference. First operand has 175 places, 297 transitions, 3907 flow. Second operand 6 states and 208 transitions. [2024-05-12 10:39:23,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 363 transitions, 5303 flow [2024-05-12 10:39:24,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 363 transitions, 4985 flow, removed 125 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:24,336 INFO L231 Difference]: Finished difference. Result has 177 places, 332 transitions, 4457 flow [2024-05-12 10:39:24,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3619, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4457, PETRI_PLACES=177, PETRI_TRANSITIONS=332} [2024-05-12 10:39:24,337 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 116 predicate places. [2024-05-12 10:39:24,337 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 332 transitions, 4457 flow [2024-05-12 10:39:24,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:24,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:24,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:24,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:39:24,338 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:24,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1299384251, now seen corresponding path program 6 times [2024-05-12 10:39:24,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:24,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477933045] [2024-05-12 10:39:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:24,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477933045] [2024-05-12 10:39:24,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477933045] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:24,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:24,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090904413] [2024-05-12 10:39:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:24,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:24,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:24,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:24,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 332 transitions, 4457 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:24,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:24,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:24,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:26,641 INFO L124 PetriNetUnfolderBase]: 9792/14414 cut-off events. [2024-05-12 10:39:26,641 INFO L125 PetriNetUnfolderBase]: For 342087/342096 co-relation queries the response was YES. [2024-05-12 10:39:26,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100754 conditions, 14414 events. 9792/14414 cut-off events. For 342087/342096 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 91660 event pairs, 2702 based on Foata normal form. 9/14396 useless extension candidates. Maximal degree in co-relation 100670. Up to 12142 conditions per place. [2024-05-12 10:39:26,810 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 223 selfloop transitions, 199 changer transitions 0/436 dead transitions. [2024-05-12 10:39:26,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 436 transitions, 6450 flow [2024-05-12 10:39:26,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:39:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:39:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 348 transitions. [2024-05-12 10:39:26,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6327272727272727 [2024-05-12 10:39:26,811 INFO L175 Difference]: Start difference. First operand has 177 places, 332 transitions, 4457 flow. Second operand 10 states and 348 transitions. [2024-05-12 10:39:26,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 436 transitions, 6450 flow [2024-05-12 10:39:27,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 436 transitions, 6230 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:27,654 INFO L231 Difference]: Finished difference. Result has 185 places, 361 transitions, 5287 flow [2024-05-12 10:39:27,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5287, PETRI_PLACES=185, PETRI_TRANSITIONS=361} [2024-05-12 10:39:27,654 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 124 predicate places. [2024-05-12 10:39:27,654 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 361 transitions, 5287 flow [2024-05-12 10:39:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:27,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:27,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:39:27,655 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:27,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1293670331, now seen corresponding path program 7 times [2024-05-12 10:39:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:27,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029220437] [2024-05-12 10:39:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029220437] [2024-05-12 10:39:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029220437] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:27,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:27,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:27,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848738111] [2024-05-12 10:39:27,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:27,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:28,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:28,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 361 transitions, 5287 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:28,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:28,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:28,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:30,487 INFO L124 PetriNetUnfolderBase]: 9827/14435 cut-off events. [2024-05-12 10:39:30,488 INFO L125 PetriNetUnfolderBase]: For 379972/379978 co-relation queries the response was YES. [2024-05-12 10:39:30,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105925 conditions, 14435 events. 9827/14435 cut-off events. For 379972/379978 co-relation queries the response was YES. Maximal size of possible extension queue 655. Compared 91426 event pairs, 2496 based on Foata normal form. 10/14418 useless extension candidates. Maximal degree in co-relation 105839. Up to 12182 conditions per place. [2024-05-12 10:39:30,653 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 227 selfloop transitions, 213 changer transitions 0/454 dead transitions. [2024-05-12 10:39:30,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 454 transitions, 6963 flow [2024-05-12 10:39:30,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 377 transitions. [2024-05-12 10:39:30,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231404958677685 [2024-05-12 10:39:30,655 INFO L175 Difference]: Start difference. First operand has 185 places, 361 transitions, 5287 flow. Second operand 11 states and 377 transitions. [2024-05-12 10:39:30,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 454 transitions, 6963 flow [2024-05-12 10:39:31,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 454 transitions, 6705 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-05-12 10:39:31,997 INFO L231 Difference]: Finished difference. Result has 192 places, 373 transitions, 5662 flow [2024-05-12 10:39:31,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5662, PETRI_PLACES=192, PETRI_TRANSITIONS=373} [2024-05-12 10:39:31,998 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 131 predicate places. [2024-05-12 10:39:31,998 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 373 transitions, 5662 flow [2024-05-12 10:39:31,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:31,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:31,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:31,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:39:31,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:31,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:32,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1100082461, now seen corresponding path program 8 times [2024-05-12 10:39:32,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:32,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101818643] [2024-05-12 10:39:32,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:32,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:32,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:32,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:32,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101818643] [2024-05-12 10:39:32,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101818643] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:32,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:32,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:32,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659438377] [2024-05-12 10:39:32,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:32,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:32,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:32,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:32,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:32,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 373 transitions, 5662 flow. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:32,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:32,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:32,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:34,945 INFO L124 PetriNetUnfolderBase]: 9819/14363 cut-off events. [2024-05-12 10:39:34,945 INFO L125 PetriNetUnfolderBase]: For 370136/370142 co-relation queries the response was YES. [2024-05-12 10:39:35,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104956 conditions, 14363 events. 9819/14363 cut-off events. For 370136/370142 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 90473 event pairs, 2465 based on Foata normal form. 4/14356 useless extension candidates. Maximal degree in co-relation 104868. Up to 12176 conditions per place. [2024-05-12 10:39:35,098 INFO L140 encePairwiseOnDemand]: 42/55 looper letters, 211 selfloop transitions, 199 changer transitions 0/424 dead transitions. [2024-05-12 10:39:35,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 424 transitions, 6826 flow [2024-05-12 10:39:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 251 transitions. [2024-05-12 10:39:35,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6519480519480519 [2024-05-12 10:39:35,099 INFO L175 Difference]: Start difference. First operand has 192 places, 373 transitions, 5662 flow. Second operand 7 states and 251 transitions. [2024-05-12 10:39:35,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 424 transitions, 6826 flow [2024-05-12 10:39:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 424 transitions, 6340 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:36,188 INFO L231 Difference]: Finished difference. Result has 192 places, 373 transitions, 5585 flow [2024-05-12 10:39:36,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5176, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5585, PETRI_PLACES=192, PETRI_TRANSITIONS=373} [2024-05-12 10:39:36,189 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 131 predicate places. [2024-05-12 10:39:36,189 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 373 transitions, 5585 flow [2024-05-12 10:39:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:36,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:36,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:36,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:39:36,189 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:36,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:36,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1293678267, now seen corresponding path program 2 times [2024-05-12 10:39:36,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:36,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399350008] [2024-05-12 10:39:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:36,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:36,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:36,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399350008] [2024-05-12 10:39:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399350008] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:36,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139343922] [2024-05-12 10:39:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:36,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:39:36,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 373 transitions, 5585 flow. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:36,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:36,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:39:36,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:39,065 INFO L124 PetriNetUnfolderBase]: 10112/14856 cut-off events. [2024-05-12 10:39:39,065 INFO L125 PetriNetUnfolderBase]: For 412280/412286 co-relation queries the response was YES. [2024-05-12 10:39:39,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107214 conditions, 14856 events. 10112/14856 cut-off events. For 412280/412286 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 95078 event pairs, 2556 based on Foata normal form. 58/14884 useless extension candidates. Maximal degree in co-relation 107125. Up to 12295 conditions per place. [2024-05-12 10:39:39,266 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 324 selfloop transitions, 64 changer transitions 0/434 dead transitions. [2024-05-12 10:39:39,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 434 transitions, 6767 flow [2024-05-12 10:39:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 280 transitions. [2024-05-12 10:39:39,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-05-12 10:39:39,269 INFO L175 Difference]: Start difference. First operand has 192 places, 373 transitions, 5585 flow. Second operand 8 states and 280 transitions. [2024-05-12 10:39:39,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 434 transitions, 6767 flow [2024-05-12 10:39:40,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 434 transitions, 6360 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:40,588 INFO L231 Difference]: Finished difference. Result has 194 places, 375 transitions, 5381 flow [2024-05-12 10:39:40,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=194, PETRI_TRANSITIONS=375} [2024-05-12 10:39:40,588 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 133 predicate places. [2024-05-12 10:39:40,588 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 375 transitions, 5381 flow [2024-05-12 10:39:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:40,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:40,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:40,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:39:40,589 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:40,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1307010747, now seen corresponding path program 3 times [2024-05-12 10:39:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:40,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411576897] [2024-05-12 10:39:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:41,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:41,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411576897] [2024-05-12 10:39:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411576897] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879041637] [2024-05-12 10:39:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:41,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:41,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:41,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:41,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 55 [2024-05-12 10:39:41,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 375 transitions, 5381 flow. Second operand has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:41,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:41,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 55 [2024-05-12 10:39:41,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:43,723 INFO L124 PetriNetUnfolderBase]: 10882/15976 cut-off events. [2024-05-12 10:39:43,724 INFO L125 PetriNetUnfolderBase]: For 452406/452412 co-relation queries the response was YES. [2024-05-12 10:39:43,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114646 conditions, 15976 events. 10882/15976 cut-off events. For 452406/452412 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 103608 event pairs, 2596 based on Foata normal form. 52/15998 useless extension candidates. Maximal degree in co-relation 114556. Up to 11851 conditions per place. [2024-05-12 10:39:43,915 INFO L140 encePairwiseOnDemand]: 45/55 looper letters, 326 selfloop transitions, 72 changer transitions 0/444 dead transitions. [2024-05-12 10:39:43,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 444 transitions, 6719 flow [2024-05-12 10:39:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:43,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:43,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 285 transitions. [2024-05-12 10:39:43,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6477272727272727 [2024-05-12 10:39:43,916 INFO L175 Difference]: Start difference. First operand has 194 places, 375 transitions, 5381 flow. Second operand 8 states and 285 transitions. [2024-05-12 10:39:43,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 444 transitions, 6719 flow [2024-05-12 10:39:45,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 444 transitions, 6564 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:45,317 INFO L231 Difference]: Finished difference. Result has 196 places, 378 transitions, 5461 flow [2024-05-12 10:39:45,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5461, PETRI_PLACES=196, PETRI_TRANSITIONS=378} [2024-05-12 10:39:45,318 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 135 predicate places. [2024-05-12 10:39:45,318 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 378 transitions, 5461 flow [2024-05-12 10:39:45,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.0) internal successors, (176), 8 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:45,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:45,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:45,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:39:45,318 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:45,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1993939967, now seen corresponding path program 2 times [2024-05-12 10:39:45,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:45,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962301528] [2024-05-12 10:39:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:45,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:45,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:45,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962301528] [2024-05-12 10:39:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962301528] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:45,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:45,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107471338] [2024-05-12 10:39:45,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:45,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:45,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:45,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 55 [2024-05-12 10:39:45,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 378 transitions, 5461 flow. Second operand has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:45,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:45,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 55 [2024-05-12 10:39:45,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:48,310 INFO L124 PetriNetUnfolderBase]: 10474/15563 cut-off events. [2024-05-12 10:39:48,310 INFO L125 PetriNetUnfolderBase]: For 484360/484872 co-relation queries the response was YES. [2024-05-12 10:39:48,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113499 conditions, 15563 events. 10474/15563 cut-off events. For 484360/484872 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 103266 event pairs, 3054 based on Foata normal form. 71/15382 useless extension candidates. Maximal degree in co-relation 113408. Up to 13225 conditions per place. [2024-05-12 10:39:48,509 INFO L140 encePairwiseOnDemand]: 46/55 looper letters, 279 selfloop transitions, 72 changer transitions 0/420 dead transitions. [2024-05-12 10:39:48,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 420 transitions, 6471 flow [2024-05-12 10:39:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2024-05-12 10:39:48,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-05-12 10:39:48,511 INFO L175 Difference]: Start difference. First operand has 196 places, 378 transitions, 5461 flow. Second operand 7 states and 240 transitions. [2024-05-12 10:39:48,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 420 transitions, 6471 flow [2024-05-12 10:39:49,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 420 transitions, 6352 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 10:39:49,856 INFO L231 Difference]: Finished difference. Result has 199 places, 385 transitions, 5599 flow [2024-05-12 10:39:49,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5599, PETRI_PLACES=199, PETRI_TRANSITIONS=385} [2024-05-12 10:39:49,857 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 138 predicate places. [2024-05-12 10:39:49,857 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 385 transitions, 5599 flow [2024-05-12 10:39:49,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.428571428571427) internal successors, (164), 7 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:49,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:49,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:49,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:39:49,858 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:49,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:49,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1053871839, now seen corresponding path program 1 times [2024-05-12 10:39:49,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:49,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091677938] [2024-05-12 10:39:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091677938] [2024-05-12 10:39:50,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091677938] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:50,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:50,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:50,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939475820] [2024-05-12 10:39:50,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:50,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:50,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:50,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:50,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:50,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 385 transitions, 5599 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:50,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:50,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:50,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:53,415 INFO L124 PetriNetUnfolderBase]: 12694/18448 cut-off events. [2024-05-12 10:39:53,415 INFO L125 PetriNetUnfolderBase]: For 532967/532970 co-relation queries the response was YES. [2024-05-12 10:39:53,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131665 conditions, 18448 events. 12694/18448 cut-off events. For 532967/532970 co-relation queries the response was YES. Maximal size of possible extension queue 902. Compared 120412 event pairs, 3063 based on Foata normal form. 36/18469 useless extension candidates. Maximal degree in co-relation 131572. Up to 14987 conditions per place. [2024-05-12 10:39:53,611 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 403 selfloop transitions, 53 changer transitions 0/470 dead transitions. [2024-05-12 10:39:53,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 470 transitions, 7412 flow [2024-05-12 10:39:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2024-05-12 10:39:53,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6597402597402597 [2024-05-12 10:39:53,612 INFO L175 Difference]: Start difference. First operand has 199 places, 385 transitions, 5599 flow. Second operand 7 states and 254 transitions. [2024-05-12 10:39:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 470 transitions, 7412 flow [2024-05-12 10:39:54,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 470 transitions, 7285 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-05-12 10:39:54,992 INFO L231 Difference]: Finished difference. Result has 204 places, 393 transitions, 5785 flow [2024-05-12 10:39:54,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5472, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5785, PETRI_PLACES=204, PETRI_TRANSITIONS=393} [2024-05-12 10:39:54,992 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 143 predicate places. [2024-05-12 10:39:54,993 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 393 transitions, 5785 flow [2024-05-12 10:39:54,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:54,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:54,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:54,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:39:54,993 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:39:54,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -438775987, now seen corresponding path program 2 times [2024-05-12 10:39:54,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:54,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231833125] [2024-05-12 10:39:54,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:55,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:55,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231833125] [2024-05-12 10:39:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231833125] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:55,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:55,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752511566] [2024-05-12 10:39:55,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:55,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:55,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:55,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:55,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:39:55,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 393 transitions, 5785 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:55,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:55,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:39:55,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:58,677 INFO L124 PetriNetUnfolderBase]: 13177/19443 cut-off events. [2024-05-12 10:39:58,677 INFO L125 PetriNetUnfolderBase]: For 598435/598438 co-relation queries the response was YES. [2024-05-12 10:39:58,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139208 conditions, 19443 events. 13177/19443 cut-off events. For 598435/598438 co-relation queries the response was YES. Maximal size of possible extension queue 951. Compared 130114 event pairs, 4906 based on Foata normal form. 42/19389 useless extension candidates. Maximal degree in co-relation 139113. Up to 17134 conditions per place. [2024-05-12 10:39:59,241 INFO L140 encePairwiseOnDemand]: 44/55 looper letters, 380 selfloop transitions, 53 changer transitions 0/447 dead transitions. [2024-05-12 10:39:59,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 447 transitions, 7078 flow [2024-05-12 10:39:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:59,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 241 transitions. [2024-05-12 10:39:59,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625974025974026 [2024-05-12 10:39:59,242 INFO L175 Difference]: Start difference. First operand has 204 places, 393 transitions, 5785 flow. Second operand 7 states and 241 transitions. [2024-05-12 10:39:59,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 447 transitions, 7078 flow [2024-05-12 10:40:00,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 447 transitions, 6963 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-05-12 10:40:00,708 INFO L231 Difference]: Finished difference. Result has 209 places, 395 transitions, 5852 flow [2024-05-12 10:40:00,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=5670, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5852, PETRI_PLACES=209, PETRI_TRANSITIONS=395} [2024-05-12 10:40:00,709 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 148 predicate places. [2024-05-12 10:40:00,709 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 395 transitions, 5852 flow [2024-05-12 10:40:00,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:00,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:00,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:40:00,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:40:00,710 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-05-12 10:40:00,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash -438923857, now seen corresponding path program 3 times [2024-05-12 10:40:00,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:00,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889990922] [2024-05-12 10:40:00,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889990922] [2024-05-12 10:40:00,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889990922] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:00,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:00,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:40:00,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325272958] [2024-05-12 10:40:00,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:00,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:40:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:00,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:40:00,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:40:01,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 55 [2024-05-12 10:40:01,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 395 transitions, 5852 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:01,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:01,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 55 [2024-05-12 10:40:01,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:04,575 INFO L124 PetriNetUnfolderBase]: 14069/20683 cut-off events. [2024-05-12 10:40:04,575 INFO L125 PetriNetUnfolderBase]: For 642313/642316 co-relation queries the response was YES. [2024-05-12 10:40:04,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148807 conditions, 20683 events. 14069/20683 cut-off events. For 642313/642316 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 139013 event pairs, 4966 based on Foata normal form. 36/20656 useless extension candidates. Maximal degree in co-relation 148710. Up to 17361 conditions per place.